DIY_EFI Digest Monday, 15 September 1997 Volume 02 : Number 320 In this issue: RE: DIY_EFI Digest V2 #318 Re: All the non-DYI-EFI crap I've put up here Re: All the non-DYI-EFI crap I've put up here Re: L-jet over rich eprom programmer Re: fuel flow sensing Re: fuel flow sensing Re: eprom programmer Re: carb vs. efi Re: carb vs. efi Re: ? for you guys Re: L-jet over rich How to Build CFI. Re: fuel flow sensing Re: carb vs. efi Vs: eprom programmer RE: why is rich better for power ?? Re: fuel flow sensing Injector"spray"vs.evaporation Re: fuel flow sensing Re: How to Build CFI. Re: o2 sensors in Australia Re: fuel flow sensing Wideband O2 Sensor?? Re: Vs: eprom programmer RE: why is rich better for power ?? Re: fuel flow sensing Re: fuel flow sensing Re: How to Build CFI. A/F Meter readings Re: L-jet over rich [none] See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: talltom@xxx.com Date: Sun, 14 Sep 1997 03:24:43 PDT Subject: RE: DIY_EFI Digest V2 #318 ------------------------------ From: "Joe Chiasson" Date: Sun, 14 Sep 1997 07:30:36 -0500 Subject: Re: All the non-DYI-EFI crap I've put up here > Vehicle is a 34 foot long converted Immigration Bus - Basically a Ford C-600 > tilt cab with a 27 foot passenger bus body placed where the flat bed would be. > Engine is a 429, 5 speed with granny and 2 speed rear end. > Maybe I will move south, solid water sort of scares me too, even though I'm used to it. Sounds like this is going to be one mean RV. SInce you have everything figured into the computer concerning state of fuel etc... you shouldn't have a problem. Were just a couple of sugestions in case you wanted to fucntion in "The Great White North" off the propane. But do to your solid-water-phobia I'm sure you will avoid these areas. Again thanks, not too many people will go into much detail with their projects as you have, and thus we don't learn as much as we possibly could. As soon as I get off my lazy ass and start really working on something of my own I will be sure to post it, because I will surely need the help. J. ------------------------------ From: "Joe Chiasson" Date: Sun, 14 Sep 1997 07:42:00 -0500 Subject: Re: All the non-DYI-EFI crap I've put up here > Using a dry vapor regulator off the top of the tank (still looking - any clues)... Have you thought of using, or have you already played with, a bbq bottle regulator. You should be able to modify it (if needed) or adjust it properly to give constant X psi over atmosphere. J. ------------------------------ From: "Wilman Lee" Date: Sun, 14 Sep 1997 21:56:17 +0800 Subject: Re: L-jet over rich - ---------- > From: sjacobs914@xxx.com > To: diy_efi@xxx.edu > Subject: L-jet over rich > Date: Saturday, September 13, 1997 11:08 AM > > Hello all, > > I am trying to get a 74 914 with L-jet thru emissions. And we are > running rich, really rich. I have checked out every component of the > system, they are all fine. But I have playied with the air flow meter. > I notice if I hold back the plate physically I am running in the right > ball park. Is there a way of adjusting the flapper so more resitacance > from the spring is provided? Open the top plastic cover and adjust the flap spring tension underneath. I have not hooked up the CO2 meter yet, > don't need to as much black smoke that pours out the tail pipe. It is a > visual thing. Please help me with this one. > > Once past the test, this car wil be exempt then I will be build a new > intake system and using a PEFI of homebrew. > > Also I am looking for information on someone building a direct ignition > system. I have seen the stuff on the DTI-EFI web site, but I am looking > more for a premade kit. > > Take care, > Stephen Jacobs > SJacobs914@xxx.com ------------------------------ From: "Wilman Lee" Date: Sun, 14 Sep 1997 22:07:27 +0800 Subject: eprom programmer Can anyone tell me where I can buy an eprom programmer for 27C1024, 28F010 and 27512 chips? I use a laptop and I do not live in the U.S. LEE ------------------------------ From: bwmsbldr@xxx.com (Bill Williams) Date: Sun, 14 Sep 1997 10:33:15 -0600 Subject: Re: fuel flow sensing The pressure will be under 10 PSI so it will not pose much of a problem. The vane or turbine meters may not meet your requirements for accuracy. There is a positive displacement type pump that would be cheap, accurate and reversible called a peristalsis pump. It is usually used to meter chemicals etc. but with the right material choices would make an excellent flow meter. It is simply a tube arranged inside a circular housing with two or more rollers compressing the tube and rotating within the housing. A fixed volume is trapped between the rollers and the rotational rate is proportional to the flow. All hinges on the correct choice of tube for chemical compatibility and mechanical characteristics. Try the local chemical supply houses for one of these pumps and the tubing. - --- Bill in Boulder "Engineering as an Art Form" --- ------------------------------ From: clsnyde@xxx.net (Clare Snyder) Date: Sun, 14 Sep 1997 18:06:18 GMT Subject: Re: fuel flow sensing >On Sun, 14 Sep 1997 07:29:48 +1000, Justin Albury >wrote: > >>have you seen the setup on vk & vl 5.0 non efi commodores??? the fuel >>flow sensor screws in infront of the carbie......still very $$$$$ new >>but you should find a wecked calis with one on it ..... > >Eh, speak up man, that mumbling's entirely too faint for those dying to >get some true but inexpensive flow measuring scheme going...so, could >you say in more detail and slowly for the older folks, just what this >"vk & vl non efi commodores" is?? Please. > >Garfield > It's Ausi-Speak. A Commodore is a Holden, otherwize known as an Aussi GM - totally out of reach of us northern hemisphere guys. ------------------------------ From: Webb Date: Sun, 14 Sep 1997 10:23:31 -0800 Subject: Re: eprom programmer - --------------5A269C6876F4FCC7F84E7563 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit JDR Microdevices Wilman Lee wrote: > Can anyone tell me where I can buy an eprom programmer for > 27C1024, 28F010 > and 27512 chips? I use a laptop and I do not live in the U.S. > > LEE - --------------5A269C6876F4FCC7F84E7563 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit  JDR Microdevices

Wilman Lee wrote:

Can anyone tell me where I can buy an eprom programmer for 27C1024, 28F010
and 27512 chips? I use a laptop and I do not live in the U.S.

LEE

   - --------------5A269C6876F4FCC7F84E7563-- ------------------------------ From: Seth Date: Sun, 14 Sep 1997 11:39:26 -0700 (PDT) Subject: Re: carb vs. efi On Fri, 12 Sep 1997, Dave Compton wrote: > > he'p me out here .... have a friend that's a died-in-the-wool > > Holley carb fan and thinks I've made a big mistake going to efi > > (I'm not racing) > > > > He's an engineer, has worked as a mechanic, owned a speed shop > > and raced for a number of years, so I regard his opinion. > > > > He argues that no top racer (NHRA is his game) runs efi. I admit I wonder if you could even run EFI near a twin magneto system, due to the EMI? Seth ------------------------------ From: Seth Date: Sun, 14 Sep 1997 11:42:58 -0700 (PDT) Subject: Re: carb vs. efi On Fri, 12 Sep 1997, Bill Williams wrote: > Someone else out there has read Ricardo! > --- Bill in Boulder "Engineering as > an Art Form" --- > Ricardo Mantalban? or that boring guy who worried about combustion chambers for diesels and other acana? Seth ------------------------------ From: Seth Date: Sun, 14 Sep 1997 11:57:16 -0700 (PDT) Subject: Re: ? for you guys On Sat, 13 Sep 1997, Dave Stinar wrote: > Ok, here it goes, Ive been on the list for way to long. I just havent had > the time really consider doing a project, but a few things have come up in > which I problaby could shave off a lot of junkyard time and money. > > My wifes cavaler just blew a rod and the car is not worth fixing (thats why > we now have a 1997 geo metro) and my lebaron is problaby not far behind. > the computers and the electrics are all in good order its just the > engines/bodys that are shot. > > Now just a couple of months ago my rx7 had the thermostat froze closed and > the needel on the temp peged itself at the top, now the rear rotor is gone > (I think) no mater what I need to take the engine out and disasemble it. > What my thought was could I in any way that does not require me to go and > do to much reprograming on eather of thoses systems from the cavaler or > lebaron alow me to retrofit them to my rx-7's wankel engine. > > I have considered getting a efi system from a junked rx-7 but the only rx-7 > around here are the old 78-85 models, non have efi units on them. > > The cavaler has a tbi system and the lebaron has a multi port fi system. I > can see good and bad in using both systems. > > cavaler= 4cyl-tbi-2.0L > lebaron=4cyl-mpfi-2.2L > rx-7=2 rotor/6cyl-carb-1.1L > > Any advice I can get would be great, thanx in advance. > dave s > > > '70 vw bug > '76 cj5 jeep > '78 handa 550-4 > '82 rx7 gsl (my baby) > '85 chevy cavaler > '85 lebaron turbo > 97 geo metro > The 1985 rx-7 GSL-SE has efi, and it isn't bad, but it's for a 13B, not a 12A. Should work, though, if a bit rich Seth Allen ------------------------------ From: Seth Date: Sun, 14 Sep 1997 12:02:58 -0700 (PDT) Subject: Re: L-jet over rich On Sun, 14 Sep 1997, Wilman Lee wrote: > > > ---------- > > From: sjacobs914@xxx.com > > To: diy_efi@xxx.edu > > Subject: L-jet over rich > > Date: Saturday, September 13, 1997 11:08 AM > > > > Hello all, > > > > I am trying to get a 74 914 with L-jet thru emissions. And we are > > running rich, really rich. I have checked out every component of the > > system, they are all fine. But I have playied with the air flow meter. > > I notice if I hold back the plate physically I am running in the right > > ball park. Is there a way of adjusting the flapper so more resitacance > > from the spring is provided? > Open the top plastic cover and adjust the flap spring tension underneath. > > I have not hooked up the CO2 meter yet, > > don't need to as much black smoke that pours out the tail pipe. It is a > > visual thing. Please help me with this one. > > > > Once past the test, this car wil be exempt then I will be build a new > > intake system and using a PEFI of homebrew. > > > > Also I am looking for information on someone building a direct ignition > > system. I have seen the stuff on the DTI-EFI web site, but I am looking > > more for a premade kit. > > > > Take care, > > Stephen Jacobs > > SJacobs914@xxx.com > Stephen- my 1975 1.8 L-Jet gave black smoke with bad vacuum leaks. Wierd, huh? Try the coolant temp sensor first, the call automobile atlanta for a kit with all the new 20 year old vacuum hoses that need replacing. then plug in the vacuum lines to the vacuum advance/retard ports on the distributor, if your car is anything like mine. It's lots cleaner and starts and runs well. Also gets good mileage. Seth ------------------------------ From: MHR Racing Date: Sun, 14 Sep 1997 15:58:21 -0500 Subject: How to Build CFI. I have a dune buggy project in mind. I have alot of knowlegde in building engines and race engines and i'm building a vw 1835 as i dont want to overstress the motor or over heat it since its going to be in the mud. BUT i am building i really really really nicely built "to the hilt" motor and i wanted to do it as low buck as i can. now this is where you guys come in. I wanted to know how do i build a 1 sensor CFI system. Ok i know it exist because its going to cost me 1 damned thousand dollars. I know this. Its adjustable from the inside of the car and only works w/ 1 sensor. Also i know it's Throttle bodies look like the dual carbs you would normally buy....what do you all think? ------------------------------ From: garfield@xxx.com (Garfield) Date: Sun, 14 Sep 1997 20:51:00 GMT Subject: Re: fuel flow sensing On Sun, 14 Sep 1997 18:06:18 GMT, clsnyde@xxx.net (Clare Snyder) wrote: >It's Ausi-Speak. A Commodore is a Holden, otherwize known as an Aussi GM= - >totally out of reach of us northern hemisphere guys. Oh, not so fast, my good man. I have "mates" in Oz, who could do a pull or two, if only I knew what to ask them to get me. Yous guys in Oz, is the designation "off a VK or VL 5.0 non efi Commodore...get me the fuel flow sensor that screws into the front of the carbie" that JustinA posted, sufficient to home in on the object of interest?? Think that would do it, Justin? Lemme know so I can contact me friends DU. BTW, the Aussies are putting out some very fino vino, easily rivalling our Napa valley stuff. I've swilled quite a bit of it; good stuff. Might do to consider retirement down under. Garfield (genetic latent Aussie, me thinks) ------------------------------ From: "Christopher G. Moog" Date: Sun, 14 Sep 1997 16:26:28 -0400 Subject: Re: carb vs. efi Seth wrote: > On Fri, 12 Sep 1997, Bill Williams wrote: > > > Someone else out there has read Ricardo! > > --- Bill in Boulder "Engineering as > > an Art Form" --- > > > Ricardo Mantalban? or that boring guy who worried about combustion > chambers for diesels and other acana? > > Seth What are you a Visigoth? ------------------------------ From: "=?ISO-8859-1?Q?Jens_J=F8rgen_Larsen?=" Date: Sun, 14 Sep 1997 22:42:34 +0200 Subject: Vs: eprom programmer - ---------- LEE wrote: > > Can anyone tell me where I can buy an eprom programmer for 27C1024, 28F010 > and 27512 chips? I use a laptop and I do not live in the U.S. > > LEE Have you heard about the DATAMAN S4 ? It's a very nice piece of equipment !! You can see it on DATAMANs homepage: http://dataman.com The manufacturer is placed in the UK. JJL ------------------------------ From: Mario Tito Date: Sun, 14 Sep 1997 17:00:34 -0400 (EDT) Subject: RE: why is rich better for power ?? - ----------snip----- > Think about 50 men and 50 women blindfolded in a >room together. Now if we tell them to all find a partner of the opposite >sex and give them only a minute to do it you will find a few people left >without partners (How do you like this game so far?). So lets say, for >arguments sake that 4 people were left over. This would be an efficiency >of 96%. This is similar to what goes on in the combustion chamber as >fuel molecules are wandering around (blindfolded) looking for oxygen >molecules. >----------snip--------- >Jim Boughton >boughton@xxx.net Bet you could teach fuel injection to second graders. Can you explain Spark Advance Curves this way? :-> ..Mario T. ------------------------------ From: "Dean Flavell" Date: Mon, 15 Sep 1997 10:41:03 +1200 Subject: Re: fuel flow sensing Garfield wrote: >Yous guys in Oz, is the designation "off a VK or VL 5.0 non efi >Commodore...get me the fuel flow sensor that screws into the front of >the carbie" that JustinA posted, sufficient to home in on the object of >interest?? Think that would do it, Justin? Lemme know so I can contact >me friends DU. Would not any car that has a fuel trip computer have to have a fuel flow meter of some kind, so wouldn't the best bet be a wrecker in you own town or country? PS. Our New Zealand VH/SLE had them on too. About 4 inches upstream of the carb. Dean. (-; Many dead animals of the past changed to fossils, others preferred to be oil. ;-) ------------------------------ From: Mario Tito Date: Sun, 14 Sep 1997 18:50:41 -0400 (EDT) Subject: Injector"spray"vs.evaporation One possibly BS selling 'fact' of fuel injection was the consistency of the fuel droplets. These perfect drops would take the perfect, or at least longer, time to burn, decreasing engine knock, allowing more ignition advance, and increasing economy. The logic goes, carbs can't do this consistiently, but the high pressured injectors can atomize better. Yes. And fully evaporated gasoline 'explodes' rather than 'burns', right? Please- anyone with the scientific answers to this would be apreciated. I am afraid of sparking another "wonder-bra-carb-something-for-nothing" discussion. If this point is true, then to make the most eficcient engine, I should be concerned with not leaving gas-spray on the walls of the intake manifold, and consider sequential injection. Mario T. mailto:Freshmar@xxx.com-----'76 VW Camper FI A/T,,'79 Fiat X1/9 ------------------------------ From: garfield@xxx.com (Garfield) Date: Mon, 15 Sep 1997 01:07:48 GMT Subject: Re: fuel flow sensing On Mon, 15 Sep 1997 10:41:03 +1200, "Dean Flavell" wrote: >Would not any car that has a fuel trip computer have to have a fuel flow >meter of some kind, so wouldn't the best bet be a wrecker in you own >town or country? Oh well, you caught me. I have a confession to make. I'm so old and crusty that I've never owned an auto with a fuel trip computer, so by the time I entered the thread, I didn't realize that's the sensor we were talking about. I'd heard of said options, but never realized they did an honestTaGod flow sensor to obtain the results. Anybody recall roughly what the purported accuracy of such trip computers IS? Maybe some kind soul could help out this old fossil and suggest some suitable "donor" car models/years and where the sensor would be found, roughly (and please don't just say, "in the fuel line, you dummy", cause I can figure THAT out, heh). My interest is in an eXperimental aviation application, for both carb'd and FI engines. If these fuel trip meters only appeared in injected cars, please let me know that also. Most appreciated. Garfield ------------------------------ From: clsnyde@xxx.net (Clare Snyder) Date: Mon, 15 Sep 1997 00:30:49 GMT Subject: Re: How to Build CFI. > > >I have a dune buggy project in mind. I have alot of knowlegde in building >engines and race engines and i'm building a vw 1835 as i dont want to >overstress the motor or over heat it since its going to be in the mud. BUT i >am building i really really really nicely built "to the hilt" motor and i >wanted to do it as low buck as i can. now this is where you guys come in. I >wanted to know how do i build a 1 sensor CFI system. Ok i know it exist >because its going to cost me 1 damned thousand dollars. I know this. Its >adjustable from the inside of the car and only works w/ 1 sensor. Also i know >it's Throttle bodies look like the dual carbs you would normally buy....what >do you all think? > > > Just put a KE Jetronic system from a 1.8 Litre water cooled VW on it - simple and effective, and easy to tune rich or lean with the duty valve. ------------------------------ From: Steve Lamb Date: Mon, 15 Sep 1997 10:45:33 +1000 Subject: Re: o2 sensors in Australia >2) aftermarket. I haven't done *too* much looking in this department, >only that i've found a couple of exhaust shops want 150 bucks for an >unheated o2 senor, and about 250 for a heated one (i think). These prices are ridiculous. The best I've been able to do is: $A90 - single wire (unheated) $A150 - three wire (heated) These are a 'generic' type (FuelMiser) via a friendly local auto parts supplier, who gets all his stuff from Repco (well, these anyway). I've also looked into importing some from the US, but there is only a marginal saving once you take the conversion factor and shipping into account. Cheers Steve Lamb Department of Defence, DSTO Aeronautical and Maritime Research Laboratory 506 Lorimer Street Fishermans Bend VIC 3207 Australia Tel: +61 3 9626 7525 Fax: +61 3 9626 7089 IZCC #180 ------------------------------ From: "Lawrence S. Harris III" Date: Sun, 14 Sep 1997 17:46:14 -0700 (PDT) Subject: Re: fuel flow sensing > Maybe some kind soul could help out this old fossil and suggest some > suitable "donor" car models/years and where the sensor would be found, > roughly (and please don't just say, "in the fuel line, you dummy", cause > I can figure THAT out, heh). I'm sure that most manufacturers do this like Ford does. There is no actual sensor in the fuel system. The fuel consumption can be derrived by the on time of the injectors. The computer then sends this signal to the trip computer in the form of a PWM signal. In a Ford Computer this is done on a line labeled DOL (Data output link). The computer also has an input from the VSS (Vehicle Speed Sensor) and can thus calculate MPG. Larry Harris lharris@xxx.com (770)682-8842 (voice) '86 Mustang LX 5.8 Coupe (169K) '82 BMW 635CSi Euro (131K) '76 BMW 2002 EFI Project, RUNNING! Meyers Tow'd Dune Buggy (1776cc) '83 Toyota Tercel SR-5 (214K) ------------------------------ From: "Lawrence S. Harris III" Date: Sun, 14 Sep 1997 17:48:51 -0700 (PDT) Subject: Wideband O2 Sensor?? Does anyone know where I can purchase a Wideband O2 Sensor and how much this will set me back? I prefer one that is heated if possible. Larry Harris lharris@xxx.com (770)682-8842 (voice) '86 Mustang LX 5.8 Coupe (169K) '82 BMW 635CSi Euro (131K) '76 BMW 2002 EFI Project, RUNNING! Meyers Tow'd Dune Buggy (1776cc) '83 Toyota Tercel SR-5 (214K) ------------------------------ From: Sandy Date: Sun, 14 Sep 1997 18:54:18 -0700 Subject: Re: Vs: eprom programmer I have one of them (Dataman S4) and other then the price it is a great product. You can even use it for PROM emulation. Portable, and software is pretty good. The only thing it can do well is GAL devices. Sandy At 10:42 PM 9/14/97 +0200, you wrote: > > >---------- >LEE wrote: >> >> Can anyone tell me where I can buy an eprom programmer for 27C1024, >28F010 >> and 27512 chips? I use a laptop and I do not live in the U.S. >> >> LEE > >Have you heard about the DATAMAN S4 ? It's a very nice piece of equipment >!! > >You can see it on DATAMANs homepage: http://dataman.com > >The manufacturer is placed in the UK. > >JJL > > ------------------------------ From: James Boughton Date: Sun, 14 Sep 1997 22:13:51 -0400 Subject: RE: why is rich better for power ?? It took me a while to think this one up, but given enough time I might be able to come up with something:-) What's the question? Jim Boughton boughton@xxx.net - ---------- From: Mario Tito[SMTP:mario@xxx.com] Sent: Sunday, September 14, 1997 1:00 PM To: fi discuss 2 Subject: RE: why is rich better for power ?? - ----------snip----- > Think about 50 men and 50 women blindfolded in a >room together. Now if we tell them to all find a partner of the opposite >sex and give them only a minute to do it you will find a few people left >without partners (How do you like this game so far?). So lets say, for >arguments sake that 4 people were left over. This would be an efficiency >of 96%. This is similar to what goes on in the combustion chamber as >fuel molecules are wandering around (blindfolded) looking for oxygen >molecules. >----------snip--------- >Jim Boughton >boughton@xxx.net Bet you could teach fuel injection to second graders. Can you explain Spark Advance Curves this way? :-> ..Mario T. ------------------------------ From: Jason Lewis Date: Mon, 15 Sep 1997 12:11:32 +1000 (EST) Subject: Re: fuel flow sensing Larry, On Sun, 14 Sep 1997, Lawrence S. Harris III wrote: > is done on a line labeled DOL (Data output link). The computer also has > an input from the VSS (Vehicle Speed Sensor) and can thus calculate MPG. Do you know how the Vehicle Speed Sensor works? I am currently working on a system that uses magnets fixed onto the drive shaft, and a hall effect transistor. The problem i have found is that the shaft tends to move around quite a bit (in relation to the rest of the vehicle). As i have mounted the hall effect device onto the underside of the car, it sometimese cannot sense the magnet becaues the drive shaft is too far away. I haven't had a second attempt yet (with longer magnets/stronger and moving the hall effect device closer) but i was wondering if there is some other way that i should maybe try. Thanks Jason ------------------------------ From: garfield@xxx.com (Garfield) Date: Mon, 15 Sep 1997 03:14:22 GMT Subject: Re: fuel flow sensing On Sun, 14 Sep 1997 17:46:14 -0700 (PDT), "Lawrence S. Harris III" wrote: >I'm sure that most manufacturers do this like Ford does. There is no=20 >actual sensor in the fuel system. OK, so my interest in the Commodore sensor wasn't so "overly particular". Maybe it's kinda unique? Hope not. Let me rephrase the question, then. Can anyone point out an auto likely found in the US that DOES use an actual fuel sensor like this thing JustinA refered to? Plus, his original post refered to something that was on a carb's system. I'm keen to find something like that. Anyone with further hints, please carry on. Garfield ------------------------------ From: eric schumacher Date: Sun, 14 Sep 1997 20:40:50 -0700 Subject: Re: How to Build CFI. Here's a vote for the CIS I wrote this for another post but you get the idea. After some bad experiences with EFI I switched my loyality to CIS-E for fail soft reliability. The engine will run with nothing electrical functioning other than the fuel pump of course. The second vehicle in my stable is a California Orange VW Baja Bug based on a 70 body and 74 pan (to mount the comfy seats and the soft but high-torque-capable engine mounts). Engine started life as a 2.0 914 and is now 2.1 liters with hydraulic lifters and cam. The fuel injection is a KE-Jetronic from a 16V with a home-brew open-loop electronic controller and progressive throttle body. Home brew equal length exhaust that starts with 411 manifolds and ends with a Walker Dyno-Max.. Ignition is Bosch electronic from a late Rabbit that I recurved to be like a 009 and the vacuum advance altered to maximize economy when the engine is lightly loaded. Transaxle is stock except for 3.75 ring and pinion to deal with 250x75x15 rubber on Centerline rims on the rear with Monroe adjustable coil-over shocks . Rear brakes are 70 type 3drums with a proportioning valve to adjust front rear balance. Frendo brake shoes all around and wheel cylinders too weird to detail. All flexible brake lines are steel braid. 89 Jetta seats on 74 Bug convertible squabs (to get them the right height.) Stewart Warner gas heater (where the spare tire used to live) with 411 electronic temperature controller. Big mutha deepcycle battery to run the gas heater and ham stuff with the engine off. At 12:30 AM 9/15/97 +0000, you wrote: >> >> >>I have a dune buggy project in mind. I have alot of knowlegde in building >>engines and race engines and i'm building a vw 1835 as i dont want to > ------------------------------ From: John O Hornfeck Date: Sun, 14 Sep 1997 23:42:15 -0700 Subject: A/F Meter readings John O Hornfeck wrote: > > Ok, all you O2 experts: > I installed my K&N A/F meter today on my MR2T and all seemed fine. > The little lights: up&down,up&down, then I go out on the highway and > after 15 min of 70mph NO lights. "Oh damn, junk meter." BUT it starts > working during the cool down (~4min). So I drive it some more in town > and everythings fine. BUT when I take it out on the thru-way again the > read out is gone, returning only after during prolonged idle. > > What the heck???? > > John O Continue: Drove the car again today. The A/F meter stopped functioning after 15 min of 70mph. Used my multi meter at the Ox port and there was 0 volts. Drove the car another 10 min and the gauge began functioning and the Ox port was reading normally 0-.5 volts. Is it possible/likely that an open circuit can occur and be affected by the heat? Should I be ordering a new O2 sensor? John o ------------------------------ From: sjacobs914@xxx.com Date: Mon, 15 Sep 1997 00:16:21 EDT Subject: Re: L-jet over rich Thanks to all that have responded, I have ordered a new flapper valve, mine has a resistance of 1500 - 4000 Ohms on Pins 6&9 of the harness. It is supposed to have 200-400 Ohms. Also the reading was jumpy and none linear. Which may explain why I could set it up for one RPM range, but not the interior power band. And since this is the major source for determining pulse-width, I can see why I am running rich. Higher number longer pulse-width, with those numbers if it is a linear setting, my pulse would be 10X longer than needed. Also I know someone fiddled with it, duct tape a tell tale sign of a hack job. Yes I know duct tape has its uses, including as field band aids,but a silicone sealer worked better at this particular situation. Take care, Stephen Jacobs SJacobs914@xxx.com On Sun, 14 Sep 1997 21:56:17 +0800 "Wilman Lee" writes: > > >---------- >> From: sjacobs914@xxx.com >> To: diy_efi@xxx.edu >> Subject: L-jet over rich >> Date: Saturday, September 13, 1997 11:08 AM >> >> Hello all, >> >> I am trying to get a 74 914 with L-jet thru emissions. And we are >> running rich, really rich. I have checked out every component of >the >> system, they are all fine. But I have playied with the air flow >meter. >> I notice if I hold back the plate physically I am running in the >right >> ball park. Is there a way of adjusting the flapper so more >resitacance >> from the spring is provided? >Open the top plastic cover and adjust the flap spring tension >underneath. > > I have not hooked up the CO2 meter yet, >> don't need to as much black smoke that pours out the tail pipe. It >is a >> visual thing. Please help me with this one. >> >> Once past the test, this car wil be exempt then I will be build a >new >> intake system and using a PEFI of homebrew. >> >> Also I am looking for information on someone building a direct >ignition >> system. I have seen the stuff on the DTI-EFI web site, but I am >looking >> more for a premade kit. >> >> Take care, >> Stephen Jacobs >> SJacobs914@xxx.com > ------------------------------ From: Seth Date: Sun, 14 Sep 1997 22:57:17 -0700 (PDT) Subject: [none] Okay, I have a question. eric will probably know as he has dabbled dep in the VW parts bin. I am going to use the guts of an Audi 5000 distributor with the hall effect sensor to determine engine phase for my 68HC11 project. Does anyone know if it will run off 5v, or does it need 12v? 5v is nicer for my schmitt trigger. Just being lazy and seeing if anyone knows off the top of their head, rather than trying. By the way, I am making my own wheel for it, as the 5 tooth running at 1/2 engine speed woudn't give me much useful info. Seth Allen ps- anyone know where I can find a cross compiler for the 68HC11 that runs on a 68k mac? At 16Mhz, (Mac IIX) it's getting a bit slow for websurfing... ------------------------------ End of DIY_EFI Digest V2 #320 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".