DIY_EFI Digest Saturday, 13 February 1999 Volume 04 : Number 114 In this issue: Re: VIRUS alert.... Re: Photos and ECU7 EFI Schematics are online! Re: Virus alert Re: Motorola fuel pressure sensors (IPS) PWM fuel pump Re: Ford ISC-BPA Re: PWM fuel pump TBI questions Re: TBI questions No hot start Re: TBI questions Re: PROM emulation Re: HOLDEN PCM Re: No hot start Re: [Fwd: Bins] Re: accelerometer based dyno ideas Re: TBI questions Emulators Re: TBI questions Re: TBI questions RE: accelerometer based dyno ideas Re: TBI questions Re: Code Work Re: TBI questions Re: TBI questions Fw: Liner O2 sensor Re: Liner O2 sensor Re: TBI questions Re: PWM fuel pump Re: PWM fuel pump Re: TBI questions Re: CRYOGENICS PUMP? B-O-P 215 cu in V-8 question.... See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: "David A. Cooley" Date: Fri, 12 Feb 1999 07:32:01 -0500 Subject: Re: VIRUS alert.... At 08:38 PM 2/11/99 -0800, you wrote: >Hi there >I got the attachment and opened it !!!!! >( a little picture of fireworks) >Then I deleted it. >What are the effects of this worm? > Aidan, it gathers info from the computer and posts to news groups through your mail program. =========================================================== David Cooley N5XMT Internet: N5XMT@xxx.net Packet: N5XMT@xxx. Member #7068 I am Pentium of Borg...division is futile...you will be approximated. =========================================================== ------------------------------ From: "Georg Lerm" Date: Fri, 12 Feb 1999 15:10:57 GMT-2 Subject: Re: Photos and ECU7 EFI Schematics are online! Hi Al Sorry that I am only responding at this stage. I am currently busy with another big project, non-efi that is. I would just like som clarity on cetain points. Are you talking about the new ecu7 design. AT29C010 flash ram? [noticed that you have to write 128bytes at a time- would this be a problem. They talk about sectors on the chip] Will have to get the pdf to figure it ou. Do you have a low-level asm type patch to write to the flash ram as part of the ecu6 design.How do you pass variables from basic to the assembler patches. Regards Georg Georg Lerm Chief Technician Clinical Engineering Red Cross Hospital Cape Town South Africa E-mail. georg@xxx.za Tel. +27 21 658-5120 Fax. +27 21 658-5120 ------------------------------ From: Teller.John@xxx.com Date: Fri, 12 Feb 1999 09:38:45 -0500 Subject: Re: Virus alert For a complete description check out http://www.Europe.DataFellows.com/v-descs/ska.htm This is a really thorough description of the Happy99 worm (trojan horse, whatever). Don't confuse this with the happy.exe virus - a different sort of beast. Since it patches your WSOCK32.DLL (basicly the code windows uses to access the internet) but leaves a copy of it WSOCK32.SKA, you should be able to get rid of it by deleting WSOCK32.DLL and renaming WSOCK32.SKA to WSOCK32.DLL. Delete the SKA.EXE and SKA.DLL files while you are there. These files should be located in your C:\windows directory. It seems that this worm can only attack windows 3.X with the WIN32 extensions, since Win 95 & 98 use a file called WINSOCK.DLL instead... Hi there I got the attachment and opened it !!!!! ( a little picture of fireworks) Then I deleted it. What are the effects of this worm? Thanks Aidan - -----Original Message----- From: Barry Tisdale To: diy_efi@xxx.edu> Date: Wednesday, February 03, 1999 8:22 AM Subject: VIRUS alert.... >There's a virus (worm, actually), that attaches itself to your outgoing email w/o your knowing about it. I got it & may have passed it to this group, or individual members. Goes by the name HAPPY99.EXE - please check your drive - if you find it, do NOT run it, delete it. > >If there IS a problem w/ it, contact me for the fix. > >Sorry about that - Barry > > ------------------------------ From: rauscher@xxx.com Date: Fri, 12 Feb 99 09:58:11 -0500 Subject: Re: Motorola fuel pressure sensors (IPS) Chris wrote: >So a little while back Tom Sharpe posted about some Motorola specialty >sensors, one of which measured fuel pressure relative to MAP: > >http://www.mot.com/AECS/General/AIEGSensors/Graphics/IPS.html > >The better news, for me, is the variety of fuel-rated pressure sensors >that people have posted about in the past few days. That's all I needed, >really. I can already measure MAP, and I can subtract - so PWM fuel >pressure system, here I come! I was wondering if you have come up with a feedback control loop to do this yet. I'm working on an analog method to read a fuel pressure sensor and feedback a signal to a PWM controller. This is to mantain a constant fuel pressure. I already have the basics working. If you've been working on something already, maybe two of us can get it done faster... BobR - -- ------------------------------ From: dave.williams@xxx.us (Dave Williams) Date: Fri, 12 Feb 1999 09:55:00 -0500 Subject: PWM fuel pump All of the FI systems I've looked at so far use a fuel pressure regulator referenced to manifold pressure. The regulator normally bypasses excess fuel back to the main tank or surge tank. Some newer cars use a resistor switched into the fuel pump power wire to adjust fuel pressure for hot start. Some newer cars use deadhead or "returnless" fuel rails. On an add-on EFI conversion, running a fuel return line back to the tank is a hassle, at least if you're paranoid like I am. What problems would be involved in controlling an in-tank pump by pulsewidth modulation, to keep the fuel rail pressure constant and to not have to run a return line? ------------------------------ From: Mike Brown Date: Fri, 12 Feb 1999 11:57:36 -0800 Subject: Re: Ford ISC-BPA Dave, You know the duty cylce of the pulse width so you know how much air you are passing, at least percentage wise. The feedback path is RPM. Mike Dave Williams wrote: > > How does the Ford idle air valve work? > > From the initial descriptions I found, it was a solenoid, pulsed > rapidly to shuttle the valve open and closed to meter air. Now I've > found some descriptions that make it sounds like it's fed a pulsewidth > modulated signal that varies the voltage, pulling the solenoid only > partly open as needed to meter air. > > Using it like a shuttle valve would be easier in software; using it pwm > would be harder since you could never know exactly how much air the > valve was passing, since there would be no feedback from the solenoid's > position. > ------------------------------ From: rauscher@xxx.com Date: Fri, 12 Feb 99 15:18:12 -0500 Subject: Re: PWM fuel pump Dave wrote: > All of the FI systems I've looked at so far use a fuel pressure >regulator referenced to manifold pressure. The regulator normally >bypasses excess fuel back to the main tank or surge tank. > > Some newer cars use a resistor switched into the fuel pump power >wire >to adjust fuel pressure for hot start. > >Some newer cars use deadhead or "returnless" fuel rails. > > > On an add-on EFI conversion, running a fuel return line back to the >tank is a hassle, at least if you're paranoid like I am. What >problems >would be involved in controlling an in-tank pump by pulsewidth >modulation, to keep the fuel rail pressure constant and to not have >to run a return line? There are some here who are now working on a PWM fuel pump system. I've provided a PWM controller that takes an analog input to control the duty cycle of a PM DC motor. I'm now working on a feedback control system to close the 'loop', and maintain a consistent fuel pressure. But, I think that you will still need a return line of some sort in order to bleed vapors out of the system. Any vapors or air bubbles will cause hesitation and possibly stalling. A carb vents vapors and air bubbles to the atmosphere. Don't have that luxury with a 'closed' EFI system. Even the lowly GM TBI has several bleeds in it to purge vapors out and back to the tank. A possible better use of the PWM system will be to provide a rising rate fuel pressure. This will allow the pump to relax at idle, and to run harder as required by the right foot. Just my thoughts (IMHO)... BobR - -- ------------------------------ From: Geoff Potter Date: Fri, 12 Feb 1999 15:20:49 -0500 Subject: TBI questions Does anyone know if there's a site on the 'net where I can find out what size injectors were used in stock TBI GM engines? Specificly an 87 Chevy full size truck with 5.7L engine. I've got a project I'm working on and I'd like to know what I'm dealing with. Thanks, Geoff P ------------------------------ From: kv@xxx.com Date: Fri, 12 Feb 1999 13:39:51 -0700 Subject: Re: TBI questions My 87 K5 TBI uses 55#/hr injectors. Curious about your "project"- contact me off list if you want to compare notes- kv@xxx.com >From the archives... GM TBI There is a color coding on the top of the injector, in the center of where the electrical connector goes, that does wear off, but is the flow rate code? Grn/Wht 305 CID eng about 40 #/hr Org/Blk 350 PU about 55 #/hr Yel/Brn 350 Cop Car about 65 #/hr Blu/Blk Late BBC PU about 80 #/hr EarlyBBC PU about 90 #/hr Purple?? ________________________________________________ Kevin Vannorsdel IBM Arm Electronics Development 408-256-6492 Tie 276-6492 kv@xxx.com Geoff Potter on 02/12/99 12:20:49 PM Please respond to diy_efi@xxx.edu To: diy_efiefi332engohio-stateedu , Atlanta F-Body Mailing List , third-genf-bodyorg cc: (bcc: Kevin Vannorsdel/San Jose/IBM) Subject: TBI questions Does anyone know if there's a site on the 'net where I can find out what size injectors were used in stock TBI GM engines? Specificly an 87 Chevy full size truck with 5.7L engine. I've got a project I'm working on and I'd like to know what I'm dealing with. Thanks, Geoff P ------------------------------ From: jolliffe Date: Fri, 12 Feb 1999 15:44:28 -0500 Subject: No hot start My 89 Formula 350 starts fine cold but after it reaches about 100 degrees it will not restart. If I give it some starting fluid it will start and run. All the sensors are reading normal on my OTC scanner. I tested the injectors with a "noid" light and it blinks the same way whether the engine is hot or cold. If I start the car with the stock chip and then shut it off, insert the chip from my 87 GTA, it will start and run. What could be the difference between the two chips that makes it start with the 87 chip? What controls the injectors while cranking? Thanks for your help as I have run out of things to try. Rich Jolliffe ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 16:04:01 -0500 Subject: Re: TBI questions - -----Original Message----- From: Geoff Potter To: diy_efiefi332engohio-stateedu ; Atlanta F-Body Mailing List ; third-genf-bodyorg Date: Friday, February 12, 1999 3:32 PM Subject: TBI questions >Does anyone know if there's a site on the 'net where I can find out what >size injectors were used in stock TBI GM engines? Specificly an 87 >Chevy full size truck with 5.7L engine. I've got a project I'm working >on and I'd like to know what I'm dealing with. > Thanks, > Geoff P You got 55 #/Hr cop Car are 65, color coded yellow/Brn by connectors (top of injector) Early BBC P-U 90 Late BBC PU 80 Bruce ------------------------------ From: John Andrianakis Date: Fri, 12 Feb 1999 14:16:56 +0200 Subject: Re: PROM emulation Michael Kent wrote: > > I'm interested in trying out tuning the auto with an EPROM emulator. > What levels of success have you guy's had? What systems did you use? > I'd like to find something that I can use with a laptop, emulate a 27c256, > and not cost to much. If it could do real-time changes all the better. > > This is the only inexpensive unit I could find. Don't know what to think > about getting power from the target, seems like it would be pretty hard to > start the car... > > http://www.ldti.com/hom.htm > > diy stuff: > > http://www.concentric.net/~Sanjaya/svt/smartROM.shtml > http://www.personal.u-net.com/~paulandmark/electron/Computer/ > > The second link also has some EPROM programmer designs. > > thanx, > > MK I am using the 16 bit emulator from Racelogic U.K.(link in the diy_efi links page). It works pretty well and can do real time changes- that is with out turning the engine off. It costs a lot though, around £1800 for the 16bit version. For 27c256 you dont need that so you can check if they have any 8bit emulators left at a better price. Something else to consider is the software that works with the emulator, standard comercial software wont meke yout life easier with chip tuning. Does anybody know if the software lets say from racelogic will work with another emulator? John Andrianakis. ------------------------------ From: "Ross Myers" Date: Fri, 12 Feb 1999 17:56:30 +1100 Subject: Re: HOLDEN PCM >If you or anyone have any bins for this pcm, I'd appreciate a copy. >Bruce As far as I know, the 16199728 is VERY similar to the 16210672 PCM, of which I have uploaded 2 Bin's to the DIY_FTP, look for BSTK1451.BIN & BWPJ1640.BIN (Both 27010's) They look the same on the outside, 3 connectors, 2x pink, 1x Blue. I think the 728 came out a bit later than the 672. Bye Ross Myers ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 17:01:22 -0500 Subject: Re: No hot start - -----Original Message----- From: jolliffe To: diy_efi@xxx.edu> Date: Friday, February 12, 1999 4:47 PM Subject: No hot start 89 chip is for 8 injectors 87 chip is for 9 Just use the proper chip and diagnos from there. Sounds like you may have an injector sticking, try some fuel system cleaner (something that comes in a metal can). Then the diagnostics for sticking injectors Bruce >My 89 Formula 350 starts fine cold but after it reaches about 100 >degrees it will not restart. If I give it some starting fluid it will >start and run. All the sensors are reading normal on my OTC scanner. I >tested the injectors with a "noid" light and it blinks the same way >whether the engine is hot or cold. If I start the car with the stock >chip and then shut it off, insert the chip from my 87 GTA, it will start >and run. What could be the difference between the two chips that makes >it start with the 87 chip? What controls the injectors while cranking? >Thanks for your help as I have run out of things to try. > >Rich Jolliffe > ------------------------------ From: "Ross Myers" Date: Sat, 13 Feb 1999 09:23:03 +1100 Subject: Re: [Fwd: Bins] >Three new bins have been uploaded to the incoming directory: > >> >> aujp 92 camaro 350 auto 730 >> aujmv.bin 89 350 camaro 250 auto >> bafl.bin 93 LT1 cam auto.bin Only 32k for the LT1 Auto, that seems small?. Ross Myers ------------------------------ From: Jay Wallace Date: Fri, 12 Feb 1999 17:39:17 -0500 Subject: Re: accelerometer based dyno ideas I've got a pair of AD ADXDL-05 accelerometers and have been looking for a cheap 10 -12 bit 8 channel serial port or parallel port A/D to make my own mini dyno / skidpad / engine monitor / data acquisition system. I finally found a parallel port kit (#8418-KT) at Marlin P. Jones and Associates (www.mpja.com) for $55.00. It seemed neat beacuse it also comes with C, VB, QB and Win95 routines. When I called to ask about specifications, the (ahem) gentleman on the phone said without any hesitation, rustling of papers or click of keys that it could sample at 5k samples /sec. Further conversation convinced me that he was making up values and he couldn't come up with a spec sheet. He gave me the telephone number of the manufacturer in Hong Kong but I think that I'll pass on the phone call. Does anybody have experience with this unit or know of a (cheap) replacement? TIA, Jay ------------------------------ From: "Walter Sherwin" Date: Fri, 12 Feb 1999 18:28:55 -0800 Subject: Re: TBI questions >You got 55 #/Hr >cop Car are 65, color coded yellow/Brn by connectors (top of injector) >Early BBC P-U 90 >Late BBC PU 80 >Bruce Do you happen to have a part number for the early 90 BBC TBI injectors, or an idea of what years they were available in? 90's would be useful in a new project that is underway. Thanks; Walt. ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 18:47:16 -0500 Subject: Emulators Why the worry about on the fly?. The program ain't changing, why not just edit the look up tables (etc). No need to reload all the program stuff. Since we know the address of what we're editing can't we just change that some how?. Maybe "burn" a chip with no tables switches setting, and use the emulaotor, to edit/memorize those values. This may really show, that I don't have any idea of what's really going on. Bruce Doc is already going tisk tisk tisk.............. ------------------------------ From: "Walter Sherwin" Date: Fri, 12 Feb 1999 18:47:00 -0800 Subject: Re: TBI questions >>From the archives... > GM TBI >There is a color coding on the top of the injector, in the >center of where the electrical connector goes, that does >wear off, but is the flow rate code? > Grn/Wht 305 CID eng about 40 #/hr > Org/Blk 350 PU about 55 #/hr > Yel/Brn 350 Cop Car about 65 #/hr > Blu/Blk Late BBC PU about 80 #/hr > EarlyBBC PU about 90 #/hr > Purple?? Now I am confused. I have two sets of what are supposed (??) to be 80 #/Hr BBC TBI injectors, in my hand. One set has blue/black markings, and this number etched into it, GM17084304RPD. The other set has orange/black markings, and has this number etched into it, GM5235206*RPD. Are these the same? Which one is the 80 BBC injector? Has my parts guy goofed up? Anyone got some advice? Thanks; Walt. ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 18:51:54 -0500 Subject: Re: TBI questions - -----Original Message----- From: Walter Sherwin To: diy_efi@xxx.edu> Date: Friday, February 12, 1999 6:37 PM Subject: Re: TBI questions If you find a parts house that carries Standard Brand Ignition Parts their application chart is easy to read. I "think it was" 87-88 BBC Trucks that had em. Bruce > >Do you happen to have a part number for the early 90 BBC TBI injectors, or >an idea of what years they were available in? 90's would be useful in a new >project that is underway. >Thanks; >Walt. ------------------------------ From: "James Montebello" Date: Fri, 12 Feb 1999 15:53:48 -0800 Subject: RE: accelerometer based dyno ideas > I've got a pair of AD ADXDL-05 accelerometers and have been looking > for a cheap 10 -12 bit 8 channel serial port or parallel port A/D > to make my own mini dyno / skidpad / engine monitor / data > acquisition system. I finally found a parallel port kit (#8418-KT) > at Marlin P. Jones and Associates (www.mpja.com) for $55.00. It > seemed neat beacuse it also comes with C, VB, QB and Win95 > routines. When I called to ask about specifications, the (ahem) > gentleman on the phone said without any hesitation, rustling of > papers or click of keys that it could sample at 5k samples /sec. You'd probably find a lot of relatively cheap stuff if you lowered your sights a bit. 8-bit should be quite adequate for most auto related data acquistion. A sampling rate above 100Hz is overkill. james montebello ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 19:14:16 -0500 Subject: Re: TBI questions - -----Original Message----- From: Walter Sherwin To: diy_efi@xxx.edu> Date: Friday, February 12, 1999 6:58 PM Subject: Re: TBI questions >> Grn/Wht 305 CID eng about 40 #/hr >> Org/Blk 350 PU about 55 #/hr >> Yel/Brn 350 Cop Car about 65 #/hr >> Blu/Blk Late BBC PU about 80 #/hr >> EarlyBBC PU about 90 #/hr >> Purple?? > >Now I am confused. I have two sets of what are supposed (??) to be 80 #/Hr >BBC TBI injectors, in my hand. One set has blue/black markings, and this >number etched into it, GM17084304RPD. The other set has orange/black >markings, and has this number etched into it, GM5235206*RPD. > >Are these the same? Nope Which one is the 80 BBC injector? Has my parts guy >goofed up? Anyone got some advice? You got a pair of 80s, and a pair of 55s Bruce > > >Thanks; >Walt. ------------------------------ From: Scot Sealander Date: Fri, 12 Feb 1999 18:45:03 -0800 Subject: Re: Code Work Bruce Plecan wrote: > Anyone know of a shareware/freeware for doing text editing split > screen?. How about numerous open files, along with the binary too? I use the shareware editor at http://www.idmcomp.com, called Ultraedit. I really like being able to use both the hex editor on the bin and the text editor on the code, all in one program. I usually put the bin in a smaller window at the bottom of the screen, and the text portion above that. Side by side when needed to compare two files. Program does have some nice features.... Only 30 bucks to register, too. Scot Sealander Sealand@xxx.com ------------------------------ From: "Fran and Bud" Date: Fri, 12 Feb 1999 17:01:46 +0000 Subject: Re: TBI questions I have one BBC TBI (2") that I believe is pretty early - had the hot water heated adapter that opened out to match Q-jet manifold. The injectors in it are Maroon (Dark Red?) - Lt.(Baby) Blue. Your parts guy may be able to tell what its original application was from the Production Number on the throttle body casting - PN17087021. I have never attempted to find out what it was from. - ---------- >From: "Walter Sherwin" >To: >Subject: Re: TBI questions >Date: Sat, Feb 13, 1999, 2:47 AM > >>>From the archives... >> GM TBI >>There is a color coding on the top of the injector, in the >>center of where the electrical connector goes, that does >>wear off, but is the flow rate code? >> Grn/Wht 305 CID eng about 40 #/hr >> Org/Blk 350 PU about 55 #/hr >> Yel/Brn 350 Cop Car about 65 #/hr >> Blu/Blk Late BBC PU about 80 #/hr >> EarlyBBC PU about 90 #/hr >> Purple?? > > > > >Now I am confused. I have two sets of what are supposed (??) to be 80 #/Hr >BBC TBI injectors, in my hand. One set has blue/black markings, and this >number etched into it, GM17084304RPD. The other set has orange/black >markings, and has this number etched into it, GM5235206*RPD. > >Are these the same? Which one is the 80 BBC injector? Has my parts guy >goofed up? Anyone got some advice? > > >Thanks; >Walt. > ------------------------------ From: "Walter Sherwin" Date: Fri, 12 Feb 1999 20:10:26 -0800 Subject: Re: TBI questions >>> Grn/Wht 305 CID eng about 40 #/hr >>> Org/Blk 350 PU about 55 #/hr >>> Yel/Brn 350 Cop Car about 65 #/hr >>> Blu/Blk Late BBC PU about 80 #/hr >>> EarlyBBC PU about 90 #/hr >>> Purple?? >> >>Now I am confused. I have two sets of what are supposed (??) to be 80 #/Hr >>BBC TBI injectors, in my hand. One set has blue/black markings, and this >>number etched into it, GM17084304RPD. The other set has orange/black >>markings, and has this number etched into it, GM5235206*RPD. >> >>Are these the same? > >Nope > > Which one is the 80 BBC injector? Has my parts guy >>goofed up? Anyone got some advice? > >You got a pair of 80s, and a pair of 55s >Bruce >> >> >>Thanks; >>Walt. > > ------------------------------ From: "Ord Millar" Date: Fri, 12 Feb 1999 20:29:50 -0400 Subject: Fw: Liner O2 sensor This came on the ford EEC list... does anyone know anything about these sensors? - -----Original Message----- From: Emmett To: list EEC mail Date: Friday, February 12, 1999 7:41 PM Subject: EEC: Liner O2 sensor >This is more then EEC But I know there are some people from DIY-EFI >witch I had to drop are listening. You there Bruce & Doc? > >I read an article today about new 1999 cars and there was mention of a >liner O2 sensor in the new Cadillac Catera. >It said: >No toggling below and above .5 volt just liner voltage and High voltage >meaning RICH and low voltage meaning LEAN > >-- >Emmett Stanicki stanicki@xxx.net > >Web Page http://www.cgocable.net/~stanicki > ------------------------------ From: "Bruce Plecan" Date: Fri, 12 Feb 1999 21:13:34 -0500 Subject: Re: Liner O2 sensor - -----Original Message----- From: Ord Millar To: diy_efi@xxx.edu> Date: Friday, February 12, 1999 8:46 PM Subject: Fw: Liner O2 sensor I've read the 99 Northstar shop manual, and yes they talk of a new O2 sensor (4 wire) but I haven't seen any claim of it being a true wide range unit. The only really accessible wide ratio O2 still seems to be the Honda. Bruce >This came on the ford EEC list... does anyone know anything about these >sensors? >-----Original Message----- >From: Emmett >Subject: EEC: Liner O2 sensor >>This is more then EEC But I know there are some people from DIY-EFI >>witch I had to drop are listening. You there Bruce & Doc? >>I read an article today about new 1999 cars and there was mention of a >>liner O2 sensor in the new Cadillac Catera. >>It said: >>No toggling below and above .5 volt just liner voltage and High voltage >>meaning RICH and low voltage meaning LEAN >>Emmett Stanicki stanicki@xxx.net >>Web Page http://www.cgocable.net/~stanicki ------------------------------ From: bearbvd@xxx.net (Greg Hermann) Date: Fri, 12 Feb 1999 19:17:33 -0700 Subject: Re: TBI questions >-----Original Message----- >From: Walter Sherwin >To: diy_efi@xxx.edu> >Date: Friday, February 12, 1999 6:37 PM >Subject: Re: TBI questions > >If you find a parts house that carries Standard Brand Ignition Parts their >application chart is easy to read. I "think it was" 87-88 BBC Trucks >that had em. >Bruce > > >> >>Do you happen to have a part number for the early 90 BBC TBI injectors, or >>an idea of what years they were available in? 90's would be useful in a >new >>project that is underway. >>Thanks; >>Walt. Talk to MSD Fuel Mgmnt. --They have 'em Greg ------------------------------ From: Tom Sharpe Date: Fri, 12 Feb 1999 20:19:36 -0600 Subject: Re: PWM fuel pump rauscher@xxx.com wrote: > Dave wrote: > > But, I think that you will still need a return line of some sort > in order to bleed vapors out of the system. Any vapors or air > bubbles will cause hesitation and possibly stalling. A carb vents > vapors and air bubbles to the atmosphere. Don't have that luxury > with a 'closed' EFI system. I'm going to test it with no regulator and a pill in the return line. If that works, I'll try smaller and smaller pills until I get to the dead-end system. I want to watch the speed that the pressure rises and falls to see if it can "keep up" with guestimated requirements and see if I can determine an optimum bypass size or if it's not required. Wish me luck Tom S ------------------------------ From: Tom Sharpe Date: Fri, 12 Feb 1999 20:23:51 -0600 Subject: Re: PWM fuel pump rauscher@xxx.com wrote: > A possible better use of the PWM system will be to provide a rising > rate fuel pressure. This will allow the pump to relax at idle, and > to run harder as required by the right foot. Bob and I are on the same wave length. I would like to see a pic driving it from a tach lead, MAP sensor and fuel pressure sensor. I would like to see 25 psi delta @ 0-2K rpm rising to a constant 75 psi delta above 6K rpm. Use the maps to tune the system from here.. This could be a stand alone unit or controlled by an analog signal from the ECU.. More later when we get the proto's done. Tom S ------------------------------ From: EFISYSTEMS@xxx.com Date: Fri, 12 Feb 1999 21:49:45 EST Subject: Re: TBI questions Hi Everyone, I beleive it was in 94 that GM changed the 454 injector, at that time they changed the fuel pressure from 12lbs to 30 lbs and from what I have heard they use the 12lb(fuel pressure)350 injector in it's place...although I don't know if it's the police injector or the standard injector...but.....if you want to buy an early BBC injector the best place to buy them is from Holley under part number 522-40 and can be had for around $60 jobber price,,,,,these are brand new injectors.....Holley doesn't claim them to be GM injectors as they are for single butterfly TB that they sell.....I have verified this in a vehicle. It sure is better than the $125. ea exhange from the dealer or $185 new(no core) You can see these at: http://www.holley.com/HiOctn/ProdLine/FuelInj/FIPA/522-40.html I believe this URL to be case sensitive....anyway hope that helps the group.... - -Carl Summers In a message dated 2/12/99 6:21:38 PM Pacific Standard Time, bearbvd@xxx.net writes: << Subj: Re: TBI questions Date: 2/12/99 6:21:38 PM Pacific Standard Time From: bearbvd@xxx.net (Greg Hermann) Sender: owner-diy_efi@xxx.edu Reply-to: diy_efi@xxx.edu To: diy_efi@xxx.edu >-----Original Message----- >From: Walter Sherwin >To: diy_efi@xxx.edu> >Date: Friday, February 12, 1999 6:37 PM >Subject: Re: TBI questions > >If you find a parts house that carries Standard Brand Ignition Parts their >application chart is easy to read. I "think it was" 87-88 BBC Trucks >that had em. >Bruce > > >> >>Do you happen to have a part number for the early 90 BBC TBI injectors, or >>an idea of what years they were available in? 90's would be useful in a >new >>project that is underway. >>Thanks; >>Walt. Talk to MSD Fuel Mgmnt. --They have 'em Greg >> ------------------------------ From: WATCHmeDRV@xxx.com Date: Fri, 12 Feb 1999 22:25:31 EST Subject: Re: CRYOGENICS PUMP? In a message dated 2/12/99 4:28:47 AM Eastern Standard Time, james@xxx.ca writes: << I've never seen such a pump. Liquid N2 is delivered in a pressurized container (like propane). We just open a valve and pour it out of the hose into the container we need it in. It lasts for a surprisingly long time before evaporating. What's your application? HTH jw I am pumping N2O not N2, N2O is nitrous oxide it is stored in a container at 1100psi. It boils at -130 to -140F at atmosphere pressure. I would have to have a pump to do it or have my supply bottle at about 90 to 100F and the bottle that I want to fill at about 32F (put it in the freezer overnight) This works I have done it several times to fill my NOS bottles for my drag car. The problem is that I have to then heat the bottle back up to about 100F to get my pressure of about 1000 to 1100psi that I need for nitrous injection in my dragcar. An air operated pump would will fill a 10lbs. bottle in about 5 to 7mins. NOS, COMPUCAR, and NITROUS WORKS sell these pumps but they are to proud of them, I would like to find a pump that is in the $100 to $200 range. THANKS, DETROIT AMERSON ------------------------------ From: "Michael D. Porter" Date: Fri, 12 Feb 1999 22:04:22 -0700 Subject: B-O-P 215 cu in V-8 question.... Well, I probably wasn't paying attention, and someone was probably talking about this last week , but would anyone know of the availability of a TPI manifold for the above engine? It would actually be for a Rover 3.5 liter, but should be same-same, I think. TIA. Cheers. ------------------------------ End of DIY_EFI Digest V4 #114 ***************************** 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".