DIY_EFI Digest Thursday, March 16 2000 Volume 05 : Number 106 In this issue: Atmel 8535 for engine management - Genesis Re: Crack valve availability Re: Atmel 8535 for engine management - Genesis 18mm sparkplugs turbocharger repair dual cataclysmic perverters in tandem TCom_MAP EFax sparkplug reading - Color Tune Re: dual cataclysmic perverters in tandem Re: sparkplug reading - Color Tune Re: sparkplug reading - Color Tune RE: sparkplug reading - Color Tune Mime-Version: 1.0 Re: sparkplug reading - Color Tune RE: sparkplug reading - Color Tune Re: sparkplug reading - Color Tune Sophisticated scan tool? Re: sparkplug reading - Color Tune Re: dual cataclysmic perverters in tandem Re: 18mm sparkplugs Re: sparkplug reading - Color Tune Re: sparkplug reading - Color Tune Re: sparkplug reading - Color Tune See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 17 Mar 100 00:36:48 +0800 (WST) From: Bernd Felsche Subject: Atmel 8535 for engine management - Genesis Howdy, I've started documenting the design ideas for an AVR-based ECU to "replace" a Volkswagen Digifant unit. Tha aim is a unit which is not only a plugin replacement, but also one which is expandable and can take advantage of better sensor technology. A large proportion of the design provides for communicating with "slave" chips; initially an Intersil knock chip and another AVR in a "head unit" for tuning, data logging and display. Several "spare" chip select lines are as yet to be reserved for other possible slaves. http://www.perth.dialix.com.au/~bernie/tech/EFI/vapour/Resources.html Note that this is completely untested and liable to change markedly before a working prototype is built. Hence the "vapour" :-) I'll be adding more information about allocation of internal chip resources (timers, etc) later. URLs for references will also fester. - -- Real Name: Bernd Felsche Email: nospam.bernie@xxx.au http://www.perth.dialix.com.au/~bernie - Private HP - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 2000 01:02:50 From: "Mike (Perth, Western Australia)" Subject: Re: Crack valve availability At 02:10 PM 15/3/2000 -0500, you wrote: >> part of engine if derived from manifold alone - ? > >Your plan vs a well done bulk manifold setup, what % of increase do you >really think you can attian, and at what cost? Well I've no idea - but I suppose thats one reason I'd like to explore it. I would imagine with direct incylinder injection the boil/expand from chamber heat - whereas from an inlet manifold the water is already hot before it gets into the chamber - hence not as effective... ? >> If I can do it cost effectively then i would like to pursue it, I have >spare >> heads and knowledge of controls, all I need are the crack valves and a >> way to insert them in the appropriate place (there's a joke somewhere;). > >Not trying to rain on your parade, just, thought there migh be larger gains >to be made else were for the amount of work your talking about, is all. Sorry, I should have mentioned, its not raw power gains I'm after initially, though I could sequence the flow different with boost etc. What I'm really interested in is economy via cylinder cycling... >I've gone off and done lots of stuff that a "normal" guy wouldn't bother >with, and while I've found some gains, alot have been a large project with >min gains. Very few ideas are new, just now we have better materials, dat >processing, so theings can be a bit better executed. mmmm This is what I find tantalising to some degree - the better materials and controls may well find an exploitable anomaly, >Ya might look at how Mercedes did FI on the 300SL coupes. Oh - really, did they use water injection or was that incylinder fi ? >> > Earl's Plumbing, used to have some low pressure cracking valves >> is "Earl's" a synonym for 'any' plumber or am I being too technical >;-) > >Sorry, they are a USA, kinda surplus house for Aircraft Fittings, most >usually AN stuff. They used to carry a ton of other stuff, for hydralics, >ie fuel vapor seperators, actually they were for the trannies in >helicopters. OK fair enough - I would expect similar in Australia, especially after our local Mobil fuel issue >> I never thought any (conventional) plumbers would have a small enough and >> perhaps alterable valve to suit in cylinder insertion - I suppose I >> should start ringing around plumbing engineering firms ? > >Try Aircraft first. > >> Any machinist's, hydraulic engineers on this list ? >> Saw a diesel crack valve the other day *very* large but, it was around >> 1000psi for a 500cc or so single cylinder. >> SHouldn't it be possible to find/make a valve thats around 1/4" dia >> and around 1/2 to 3/4" long for 1/8th pipe - or thereabouts ? > >OK, shouldn't Tah :) Mike - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 2000 01:09:32 From: "Mike (Perth, Western Australia)" Subject: Re: Atmel 8535 for engine management - Genesis At 12:36 AM 17/3/2000 +0800, you wrote: >Howdy, > >I've started documenting the design ideas for an AVR-based ECU to >"replace" a Volkswagen Digifant unit. Tha aim is a unit which is not >only a plugin replacement, but also one which is expandable and can >take advantage of better sensor technology. Oh great - this is what I'll be doing for my VL turbo - but I'm sort of pre-disposed to the 8051 series, like an 89S53 and maybe a 89c2051, I've programming 8051 stuff for something like 15 years so I'm fairly comfortable with it - the other good ones are 68HC11 variants. It will be interesting to see how atmels avr chips compare with their 8051 series for an application like this... >A large proportion of the design provides for communicating with >"slave" chips; initially an Intersil knock chip and another AVR in a >"head unit" for tuning, data logging and display. Several "spare" >chip select lines are as yet to be reserved for other possible >slaves. mmmm - Yep me too, think I posted something about this last couple of weeks, makes things a lot more 'top down' :) >http://www.perth.dialix.com.au/~bernie/tech/EFI/vapour/Resources.html Will have a look, incidentally, heres an AUstralian efigas site:- http://www.sunstar.com.au/efigas/ (For Bill the Arc-STarter too :) >Note that this is completely untested and liable to change markedly >before a working prototype is built. Hence the "vapour" :-) Nature of the creative mind, my lab has lots of protos for odd things that were changed when I had a 'vision' or received an email ;-) >I'll be adding more information about allocation of internal chip >resources (timers, etc) later. > >URLs for references will also fester. hehe -look forward to updates, look like I won't be doing anything practical for about 4 months - way too much bloddy work :( Tah, Rgds Mike Massen Ancient Sufi saying: "Should your God save you from adversity, choose another God" Pictures of site installation at Mendulong near Sipitang, Sabah (Malaysia) for container based RAPS... http://www.wantree.com.au/~erazmus Vehicle modifications on GMH Turbo, twin tyres, possible 175Kw at wheels Preliminary pictures at http://www.wantree.com.au/~erazmus/Twin_tyre_vehicle/ My editorial on twin-tyre opinion and good reference about tyres:- http://www.geocities.com/MotorCity/2195/ttyreopinion.html - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 08:47:49 PST From: "mike mager" Subject: 18mm sparkplugs Some Ford experts out there, I'm sure: Why did Ford use 18mm sparkplugs in 'late-model' engines, when pretty much no-one else did? Not a trick question, I am curious. Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 09:07:59 PST From: "mike mager" Subject: turbocharger repair Turbocharger parts needed: Are there any good suggestion for low-cost repair parts for a turbocharger? The application is a friend's 1980 Porsche 924 Turbo. This unit has had the usual coked mineral oil pushing out the seal failure. A remanufactured cartridge costs somewhere around 300$USD, at first check. (I'm innocent here - I didn't pour in the mineral oil, and I didn't heat-soak it.) Thanks, Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 09:13:39 PST From: "mike mager" Subject: dual cataclysmic perverters in tandem Emissions result: pass That 1994 Jeep Wrangler YJ with 2.5 liter engine (crank-triggered ignition, no EGR) did get the extra converter welded in (by a trailer-hitch mechanic), and the fresh-air aspiration leak was 'repaired' (with Great Neck locking pliers); the NOx was then within standards (the HC and CO were already fine). I am greatly amused by the whole thing, and again, I feel innocent - I did none of this silliness! (silliness that worked!) Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 12:14:08 -0500 From: mswayze@xxx.com (Mike Swayze) Subject: TCom_MAP EFax This is a multi-part message in MIME format. - ------=_NextPart_000_00BC_01BF8F41.21592600 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable just got the Efax from Jeff at Superior and have posted the .efx to = ftp://ftp.diy-efi.org/incoming/ the name of the file is TCom_MAP.efx. it has the transmission (T_Com) = info and some mapsensor info. I can if need be bust it out as .gif's later this evening. the .efx can = be viewed with free software from www.efax.com. byE Mike Swayze mswayze@xxx.com kswayze@xxx.net - ------=_NextPart_000_00BC_01BF8F41.21592600 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
just got the Efax from Jeff at Superior = and have=20 posted the .efx to  ftp://ftp.diy-efi.org/incoming/<= /A>
the name of the file is TCom_MAP.efx. = it has the=20 transmission (T_Com) info and some mapsensor info.
I can if need be bust it out as .gif's = later this=20 evening. the .efx can be viewed with free software from www.efax.com.
 
byE
Mike
Swayze

 - ------=_NextPart_000_00BC_01BF8F41.21592600-- - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 09:21:18 PST From: "mike mager" Subject: sparkplug reading - Color Tune The "New Color Tune" is here! I was greatly relieved to find that TRF (The Roadster Factory) had the Color Tune in stock (not out of production); I got mine (with no shipping delay!) for about 50USD. Do any of you have experience with Color Tune? David Vizard says that sparkplug reading is a very unreliable way of setting mixture strength; he likes to use an EGO and a Color Tune. I won't just automatically believe everything that I read, but his suggestion does at least pass a first check of reasonableness. Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 2000 01:45:57 From: "Mike (Perth, Western Australia)" Subject: Re: dual cataclysmic perverters in tandem Blimey my email filter put this in the trash, good thing I checked, you can guess from the subject title why it went there, ;-) Rgds Mike PS: I've always though it should be possible to run a 2nd cat with a little air bleed to reduce nox and HC's. At 09:13 AM 16/3/2000 PST, you wrote: >Emissions result: pass > >That 1994 Jeep Wrangler YJ with 2.5 liter engine (crank-triggered ignition, >no EGR) did get the extra converter welded in (by a trailer-hitch mechanic), >and the fresh-air aspiration leak was 'repaired' (with Great Neck locking >pliers); the NOx was then within standards (the HC and CO were already >fine). > >I am greatly amused by the whole thing, and again, I feel innocent - I did >none of this silliness! (silliness that worked!) > >Mike > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > >---------------------------------------------------------------------------- >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) >in the body of a message (not the subject) to majordomo@xxx.org > > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 12:36:31 -0500 From: "nacelp" Subject: Re: sparkplug reading - Color Tune > I was greatly relieved to find that TRF (The Roadster Factory) had the Color > Tune in stock (not out of production); I got mine (with no shipping delay!) > for about 50USD. > > Do any of you have experience with Color Tune? David Vizard says that > sparkplug reading is a very unreliable way of setting mixture strength; he > likes to use an EGO and a Color Tune. Ya, right, if your working on a dyno, or an idling engine. Want to seat under the hood while someone makes a pass at 110MPH?. EGO, ya fine, ya got $5K for a good one. Can't use either in some catagoryies of racing. Both have there places, and lots of folks happen to be pretty good reading plugs. Technology won't replace talent. Using $$$$ equipment might be handy for a pro, and a crutch for the lessers, but experience can make up for either. It boils down to starting conservatively, and optimizing from there. Yes, at times I use an ancient Color Tune for working on 1951 MG/TDs. Just seems right..... I won't just automatically believe > everything that I read, but his suggestion does at least pass a first check > of reasonableness. Not in my book Grumpy > Mike - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 2000 02:03:42 From: "Mike (Perth, Western Australia)" Subject: Re: sparkplug reading - Color Tune At 09:21 AM 16/3/2000 PST, you wrote: >The "New Color Tune" is here! >Do any of you have experience with Color Tune? David Vizard says that >sparkplug reading is a very unreliable way of setting mixture strength; he >likes to use an EGO and a Color Tune. I won't just automatically believe >everything that I read, but his suggestion does at least pass a first check >of reasonableness. By colour tune, do oyu mean that special spark plug with quartz window, because I've got one of those and could do with 5 more ;-) Tried it on a 4 cyl 1600 - very difficult to look at the plug when its on load, *grin* A helpful tool though for for idle tuning, Rgds :) Mike - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 10:23:28 -0800 From: Carl Summers Subject: RE: sparkplug reading - Color Tune Hi, Whats a Color Tune??? - -Carl Summers Click on this link below to see the easiest way to handle internet transactions. https://secure.paypal.com/refer/pal=drsagan%40pacbell.net - -----Original Message----- From: owner-diy_efi@xxx.org]On Behalf Of mike mager Sent: Thursday, March 16, 2000 9:21 AM To: diy_efi@xxx.org Subject: sparkplug reading - Color Tune The "New Color Tune" is here! I was greatly relieved to find that TRF (The Roadster Factory) had the Color Tune in stock (not out of production); I got mine (with no shipping delay!) for about 50USD. Do any of you have experience with Color Tune? David Vizard says that sparkplug reading is a very unreliable way of setting mixture strength; he likes to use an EGO and a Color Tune. I won't just automatically believe everything that I read, but his suggestion does at least pass a first check of reasonableness. Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 15:13:33 From: Bob Tom Subject: Mime-Version: 1.0 Hi, all. I have picked up a custom programmed PCM for my Dakota (normally aspirated). I'm fairly new to the EFI learning curve and have, to date, what might be described as 'surface knowledge'. I'm turning to the experts, and am requesting for all/any opinions. Below are listed the custom programming features which originally ran on a super-charged Ram ST. The company which did the programming had put it on a computer meant for the Dakota at first. Top speed limiter is 199 mph * all delays are removed-instant throttle response raised idle to 900 rpm (full charge for underdrive pulleys) raised rev limiter to 6500 raised shift points to 5600 rpm * calibrated for larger injectors (24-30 lbs will work) will work with stock injectors (19 lbs) perfectly also leaned out at idle( emissions legal on even the most wild setups) * will work on supercharged engines up to 10 lbs or nitrous up to 150hp with no detonation calibrated for higher lift cams but will work with stock perfectly also calibrated for larger throttle bodies including the 4 barrel !!! * calibrated for 160 degree thermostat The general question that I have is "is it possible to program in one PCM timing and fuel maps to cover such a broad range of performance mods". I especially welcome comments for those items with the * beside them. Any ideas what kind of delays are being referred to? Is it possible to calibrate for so many different sized injectors all at once? Does the item on SC and N2O suggests that timing is being retarded? Does calibrating for a 160 tstat involve more than not triggering a MIL? I've been holding back on installing the computer, injectors and tstat as I'm getting a SPX OTC diagnostic scanner to see what's going on. Any comments much appreciated. Thanks. Bob. Southern Ontario, Canada. 97 Dakota CC Sport,5.2L,3.55SG, auto.,4x2: best 14.917s, 90.78mph 85 Shelby Intercooled Turbo Charger,2.2L,5-spd man. 78 B100 Dodge van, '69 340-4bbl 70 Challenger,383-4bbl,slap-stik auto.,3.23SG,hemi orange,46,700 orig.mi. - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 14:30:06 PST From: "mike mager" Subject: Re: sparkplug reading - Color Tune Mike asked: (complete quotation below) >By colour tune, do oyu mean that special spark plug with quartz window, >because I've got one of those and could do with 5 more ;-) That's the Color Tune, yes. >Tried it on a 4 cyl 1600 - very difficult to look at the plug when its on >load, There is a 'view scope' with it in the box; it is just a tube to extend it a bit, and to block the ambient light, and there is a little adjustable mirror on it for sparkplug holes that are at bad angles. Mike >From: "Mike (Perth, Western Australia)" >Reply-To: diy_efi@xxx.org >To: diy_efi@xxx.org >Subject: Re: sparkplug reading - Color Tune >Date: Fri, 17 Mar 2000 02:03:42 > >At 09:21 AM 16/3/2000 PST, you wrote: > >The "New Color Tune" is here! > >Do any of you have experience with Color Tune? David Vizard says that > >sparkplug reading is a very unreliable way of setting mixture strength; >he > >likes to use an EGO and a Color Tune. I won't just automatically believe > >everything that I read, but his suggestion does at least pass a first >check > >of reasonableness. > >By colour tune, do oyu mean that special spark plug with quartz window, >because I've got one of those and could do with 5 more ;-) > >Tried it on a 4 cyl 1600 - very difficult to look at the plug when its >on load, > >*grin* > >A helpful tool though for for idle tuning, > >Rgds > >:) Mike > >---------------------------------------------------------------------------- >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the >quotes) >in the body of a message (not the subject) to majordomo@xxx.org > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 14:40:45 PST From: "mike mager" Subject: RE: sparkplug reading - Color Tune Carl Summers asked: (complete quotation below) >Hi, Whats a Color Tune??? Hi, Carl, this may be redundant, but the Color Tune is a weird little thing that you can screw into a sparkplug hole, and it works both as a window (to see the combustion color) and as a spark plug. You can adjust your combustion color (AFR) as appropriate, and as several have pointed out, a dynamometer would be a handy 'accessory' for higher loadings; the Color Tune is made for tuning only, it has 'no' heat range, and is not meant for high temperature or high pressure for over "2-3 minutes", they say. Maybe just a toy, but I wanted one. Mike >From: Carl Summers >Reply-To: diy_efi@xxx.org >To: diy_efi@xxx.org >Subject: RE: sparkplug reading - Color Tune >Date: Thu, 16 Mar 2000 10:23:28 -0800 > >Hi, Whats a Color Tune??? >-Carl Summers > > >-----Original Message----- >From: owner-diy_efi@xxx.org]On >Behalf Of mike mager >Sent: Thursday, March 16, 2000 9:21 AM >To: diy_efi@xxx.org >Subject: sparkplug reading - Color Tune > > >The "New Color Tune" is here! > >I was greatly relieved to find that TRF (The Roadster Factory) had the >Color Tune in stock (not out of production); I got mine (with no shipping >delay!) for about 50USD. > >Do any of you have experience with Color Tune? David Vizard says that >sparkplug reading is a very unreliable way of setting mixture strength; he >likes to use an EGO and a Color Tune. I won't just automatically believe >everything that I read, but his suggestion does at least pass a first check >of reasonableness. > >Mike ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 23:50:58 +0100 From: "Espen Hilde" Subject: Re: sparkplug reading - Color Tune Hi! Maybe a advanced colortune for the next century with fiber optics ,is the ansver for the DIY_EFI minded.Until ION arrives.... Espen - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 2000 10:31:02 +1100 From: Peter Gargano Subject: Sophisticated scan tool? Heard about the US$99 scan tool? : http://www.wired.com/news/technology/0,1282,34977,00.html Well maybe? - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 18:49:10 -0500 From: Shannen Durphey Subject: Re: sparkplug reading - Color Tune Spark plug with a "window". I have one. It's not for high rpm use, or sustained loads, or high temp stuff. Reach and heat range never actually match the plug you're replacing. But the idea is to watch the flame color to tune a carb. It's fun, and it can work at times. Really neat to use on efi, watch flame color go from yellow to blue as the ecm cycles lean to rich. Eastwood Co. sells 'em. They're on the web. Shannen Carl Summers wrote: > > Hi, Whats a Color Tune??? > -Carl Summers > > Click on this link below to see the easiest way to handle internet > transactions. > > https://secure.paypal.com/refer/pal=drsagan%40pacbell.net > > -----Original Message----- > From: owner-diy_efi@xxx.org]On > Behalf Of mike mager > Sent: Thursday, March 16, 2000 9:21 AM > To: diy_efi@xxx.org > Subject: sparkplug reading - Color Tune > > The "New Color Tune" is here! > > I was greatly relieved to find that TRF (The Roadster Factory) had the Color > Tune in stock (not out of production); I got mine (with no shipping delay!) > for about 50USD. > > Do any of you have experience with Color Tune? David Vizard says that > sparkplug reading is a very unreliable way of setting mixture strength; he > likes to use an EGO and a Color Tune. I won't just automatically believe > everything that I read, but his suggestion does at least pass a first check > of reasonableness. > > Mike > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com > > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Fri, 17 Mar 100 08:44:59 +0800 (WST) From: Bernd Felsche Subject: Re: dual cataclysmic perverters in tandem mike mager writes: >Emissions result: pass >That 1994 Jeep Wrangler YJ with 2.5 liter engine (crank-triggered ignition, >no EGR) did get the extra converter welded in (by a trailer-hitch mechanic), >and the fresh-air aspiration leak was 'repaired' (with Great Neck locking >pliers); the NOx was then within standards (the HC and CO were already >fine). I'd have expected there to be too little CO to reduce the NOx after the first conversion, if that was already "clean". - -- Real Name: Bernd Felsche Email: nospam.bernie@xxx.au http://www.perth.dialix.com.au/~bernie - Private HP - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 19:17:29 -0700 From: "Programmer" Subject: Re: 18mm sparkplugs Probably a couple reasons...note distance from shell to centre electrode--harder to foul--promotes less miss-firing ?? I don't really have a concrete reason. Lyndon. - -----Original Message----- From: mike mager To: diy_efi@xxx.org> Date: March 16, 2000 9:56 AM Subject: 18mm sparkplugs >Some Ford experts out there, I'm sure: > >Why did Ford use 18mm sparkplugs in 'late-model' engines, when pretty much >no-one else did? Not a trick question, I am curious. > >Mike > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > >--------------------------------------------------------------------------- - - >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) >in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 19:19:42 -0700 From: "Programmer" Subject: Re: sparkplug reading - Color Tune Can a colortune be sensitive enough to read differences in runner lengths on a regular intake manifold ?? Just curious...I'd think you'd need at least 4 of em to do a V8--then set the other half carb. Lyndon. - -----Original Message----- From: nacelp To: diy_efi@xxx.org> Date: March 16, 2000 10:40 AM Subject: Re: sparkplug reading - Color Tune > >> I was greatly relieved to find that TRF (The Roadster Factory) had the >Color >> Tune in stock (not out of production); I got mine (with no shipping >delay!) >> for about 50USD. >> >> Do any of you have experience with Color Tune? David Vizard says that >> sparkplug reading is a very unreliable way of setting mixture strength; >he >> likes to use an EGO and a Color Tune. > >Ya, right, if your working on a dyno, or an idling engine. Want to seat >under the hood while someone makes a pass at 110MPH?. EGO, ya fine, ya got >$5K for a good one. Can't use either in some catagoryies of racing. Both >have there places, and lots of folks happen to be pretty good reading plugs. >Technology won't replace talent. Using $$$$ equipment might be handy for a >pro, and a crutch for the lessers, but experience can make up for either. > It boils down to starting conservatively, and optimizing from there. >Yes, at times I use an ancient Color Tune for working on 1951 MG/TDs. Just >seems right..... > > I won't just automatically believe >> everything that I read, but his suggestion does at least pass a first >check >> of reasonableness. > >Not in my book >Grumpy > >> Mike > > >--------------------------------------------------------------------------- - - >To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) >in the body of a message (not the subject) to majordomo@xxx.org > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 21:14:38 -0500 From: "Swayze" Subject: Re: sparkplug reading - Color Tune when I ran a CO2 laser, the tune-ups we did, one of the last steps was to set the focus, the arc would go from a bright yellow to bright blue like plasma. what effect does changing the spark gap have on 'colortune' byE Mike Swayze mswayze@xxx.com kswayze@xxx.net - ----- Original Message ----- From: "Shannen Durphey" To: Sent: Thursday, March 16, 2000 6:49 PM Subject: Re: sparkplug reading - Color Tune > Spark plug with a "window". I have one. It's not for high rpm use, > or sustained loads, or high temp stuff. Reach and heat range never > actually match the plug you're replacing. But the idea is to watch > the flame color to tune a carb. It's fun, and it can work at times. > Really neat to use on efi, watch flame color go from yellow to blue as > the ecm cycles lean to rich. Eastwood Co. sells 'em. They're on the > web. > Shannen > > Carl Summers wrote: > > > > Hi, Whats a Color Tune??? > > -Carl Summers > > > > Click on this link below to see the easiest way to handle internet > > transactions. > > > > https://secure.paypal.com/refer/pal=drsagan%40pacbell.net > > > > -----Original Message----- > > From: owner-diy_efi@xxx.org]On > > Behalf Of mike mager > > Sent: Thursday, March 16, 2000 9:21 AM > > To: diy_efi@xxx.org > > Subject: sparkplug reading - Color Tune > > > > The "New Color Tune" is here! > > > > I was greatly relieved to find that TRF (The Roadster Factory) had the Color > > Tune in stock (not out of production); I got mine (with no shipping delay!) > > for about 50USD. > > > > Do any of you have experience with Color Tune? David Vizard says that > > sparkplug reading is a very unreliable way of setting mixture strength; he > > likes to use an EGO and a Color Tune. I won't just automatically believe > > everything that I read, but his suggestion does at least pass a first check > > of reasonableness. > > > > Mike > > ______________________________________________________ > > Get Your Private, Free Email at http://www.hotmail.com > > > > ---------------------------------------------------------------------------- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > in the body of a message (not the subject) to majordomo@xxx.org > > > > ---------------------------------------------------------------------------- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > in the body of a message (not the subject) to majordomo@xxx.org > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org > > - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Thu, 16 Mar 2000 21:02:39 -0500 From: Shannen Durphey Subject: Re: sparkplug reading - Color Tune That's interesting. I've never adjusted the gap size. Shannen Swayze wrote: > > when I ran a CO2 laser, the tune-ups we did, one of the last steps was to set the focus, the arc would go from a bright yellow to bright blue like plasma. what effect does changing the spark gap have on 'colortune' > > byE > Mike > Swayze > mswayze@xxx.com > kswayze@xxx.net > > ----- Original Message ----- > From: "Shannen Durphey" > To: > Sent: Thursday, March 16, 2000 6:49 PM > Subject: Re: sparkplug reading - Color Tune > > > Spark plug with a "window". I have one. It's not for high rpm use, > > or sustained loads, or high temp stuff. Reach and heat range never > > actually match the plug you're replacing. But the idea is to watch > > the flame color to tune a carb. It's fun, and it can work at times. > > Really neat to use on efi, watch flame color go from yellow to blue as > > the ecm cycles lean to rich. Eastwood Co. sells 'em. They're on the > > web. > > Shannen > > > > Carl Summers wrote: > > > > > > Hi, Whats a Color Tune??? > > > -Carl Summers > > > > > > Click on this link below to see the easiest way to handle internet > > > transactions. > > > > > > https://secure.paypal.com/refer/pal=drsagan%40pacbell.net > > > > > > -----Original Message----- > > > From: owner-diy_efi@xxx.org]On > > > Behalf Of mike mager > > > Sent: Thursday, March 16, 2000 9:21 AM > > > To: diy_efi@xxx.org > > > Subject: sparkplug reading - Color Tune > > > > > > The "New Color Tune" is here! > > > > > > I was greatly relieved to find that TRF (The Roadster Factory) had the Color > > > Tune in stock (not out of production); I got mine (with no shipping delay!) > > > for about 50USD. > > > > > > Do any of you have experience with Color Tune? David Vizard says that > > > sparkplug reading is a very unreliable way of setting mixture strength; he > > > likes to use an EGO and a Color Tune. I won't just automatically believe > > > everything that I read, but his suggestion does at least pass a first check > > > of reasonableness. > > > > > > Mike > > > ______________________________________________________ > > > Get Your Private, Free Email at http://www.hotmail.com > > > > > > ---------------------------------------------------------------------------- > > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > > in the body of a message (not the subject) to majordomo@xxx.org > > > > > > ---------------------------------------------------------------------------- > > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > > in the body of a message (not the subject) to majordomo@xxx.org > > ---------------------------------------------------------------------------- > > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > > in the body of a message (not the subject) to majordomo@xxx.org > > > > > > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ End of DIY_EFI Digest V5 #106 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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