DIY_EFI Digest Friday, 8 January 1999 Volume 04 : Number 019 In this issue: Prom for 90 dodge trunks Re: What's this ECM? Re: Prom for 90 dodge trunks Digital contact breaker and timing advance eliminator Duty Cycle Meter / A/F Ratio Meter 1 Bar, 2 Bar, and 3 Bar MAPS Re: Turbo header design Re: Photo Radar See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: jq Date: Thu, 07 Jan 1999 23:07:11 -0800 Subject: Prom for 90 dodge trunks r there any performance prom for a dodge half size truck? not those tuner box that plug in on top of the ecm!! ------------------------------ From: "Peter Fenske" Date: Thu, 7 Jan 1999 23:05:51 -0800 Subject: Re: What's this ECM? Bingo Kinda off calpak ecm 16042431 stamped lists for 85-86 Fbody code F engine, MD8 trans.. Not sure what the heck this is but is cheep enough to order :peter ------------------------------ From: "David A. Cooley" Date: Fri, 08 Jan 1999 02:17:39 -0500 Subject: Re: Prom for 90 dodge trunks There are no eproms available for Dodge vehicles... you have to buy a complete computer assy with the perf cals in it. (You can get them from the dodge dealer... Mopar Performance is the only company I know of that makes them...) Dodge (all chrysler) PCM's are potted and sealed... you'd destroy it trying to get the epoxy off the circuit board to get at the prom to unsolder it. Later, Dave At 11:07 PM 1/7/99 -0800, you wrote: >r there any performance prom for a >dodge half size truck? > >not those tuner box that plug in on top of the ecm!! =========================================================== 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: HADJIASLANIS ARIS 1260 800 Date: Fri, 8 Jan 1999 09:29:00 +0200 Subject: Digital contact breaker and timing advance eliminator Hi there, could some body help. A first step to efi is surely a good intelligent ignition system. Especially with regard to old engines in classic cars, where the above can be applied expertly to preserve the ´original´ engine bay looks. The benefits to be had from such an approach are important, and definitely very considerable in the case of highly tuned old engines. So how about a digital ignition system for my Fiat Dino 1971 2.4 litre V6 engine (a Ferrari engine) currently on its original antiquated Magnetti Marelli twin points (!) distributor (to cope with the 8000 odd RPMs this engine is capable of), complete with original (read, horrible) centrifugal advance mechanism. The requirements are relatively simple: 1. Replace the existing twin contact breakers with an optical pick up arranged to fire every 60 degrees. 2. Disable the original advance / retard mechanism. 3. Feed the optical pick up output to a digital advance / retard unit implementing a simple, programmable advance curve capable of at least 16 sites. 4. Optionally add an imput for a detonation sensor to provide a few degrees of detonation induced retard. 5. The unit should just provide an output emulating a normal contact breaker, to drive a separate high energy electronic ignition unit (already fitted in my car). Your replies will be highly appreciated Regards, Aris ------------------------------ From: Aaron Willis Date: Fri, 08 Jan 1999 00:01:32 -0800 Subject: Duty Cycle Meter / A/F Ratio Meter Haven't been followignthis thread too closely, so I'm not sure if you've discussed commercially available units yet. I found this in the Racer Wholesale catalog ('97, p. 87), looking for the Air/Fuel Meter mentioned with the snake oil / polish discussion. NEW INJECTOR AIR/FUEL RATIO MONITOR "This new Injector Air/Fuel Monitor not only will help you tune your air/fuel ratio but monitors your engines injection system simultaneously. This unit precisely monitors your injectors duty cycles. As you add headers, cams, bigger turbo, etc., you can monitor the air/fuel mixture and injector performance. As the engine leans out and your injector duty cycle reaches 100%, it's time for bigger injectors or more flow through the system. This unit can save you thousands of dollars in the trial-and-error of replacing expensive injectors and expensive engine parts. The unit works on virtually any type of electronic fuel injection and comes with easy-to-follow instructions." TPI Air/Fuel Ratio Monitor...AUT-9902 $99.95 TBI Air/Fuel Ratio Monitor...AUT-9903 $99.95 Weld-on fitting.............K85-21688 $3.91 O2 sensor plug..............K85-21686 $3.55 High Resolution O2 Sensor....AUT-9900 $57.95 Looks interesting to me. Hopefully this will prove worthwhile to someone. Has anyone had any experience with thes units? Sorry if this has been discussed already. Aaron ICQ # 27386985 ------------------------------ From: Doug Bazarnic Date: Fri, 08 Jan 1999 01:10:04 -0700 Subject: 1 Bar, 2 Bar, and 3 Bar MAPS Has anyone used / tried a 2 or 3 bar MAP sensor? I have a '95 Chevy 1/2 ton truck with a small blower making 9 lbs of boost, and I'm thinking of trying a 2 BAR map sensor from Accel. I assume all I'll have to do is adjust my fuel settings. I'm also assuming the stock computer won't throw a fit with it. Any info would be greatly appreciated. Thanks Doug Bazarnic ------------------------------ From: Clarence Wood Date: Fri, 08 Jan 1999 03:03:59 -0600 Subject: Re: Turbo header design Thanks Tom! At 10:04 PM 1/7/99 EST, you wrote: >In a message dated 1/7/99 12:36:28 PM Central Standard Time, >clarencewood@xxx.net writes: > >I think it should look like this: > > 1 8 4 3 6 5 7 2 >1 0 P C I E > 90 P C I E >2 180 E P C I > 270 E P C I >3 0 I E P C > 90 I E P C >4 180 C I E P > 270 C I E P > >The first column counts the strokes, and the second column indicates degrees >from top dead center of the #1 piston. > >Visualize the #1 and #2 pistons, whose rods are mounted on the same crank >journal, firing. #2 fires (the P at the bottom right corner of the chart). >The #1/#2 journal rotates (along with the rest of the crankshaft, hopefully!!) >90 degrees, and #1 is at TDC (the P at the top left of the chart). After >another 90 degrees of crank rotation, the #7/#8 journal , which is 180 degrees >off from the #1/#2 journal, has brought #8 to TDC (P in the "8" column). 90 >degrees later, #7 is at TDC, but at the beginning of the intake stroke (I in >the "7" column). You'll get the idea if you picture the whole thing rotating. > >I hope after all that, I got it right!? > >Tommy >TMead17327@xxx.com > > > ><< Firing order > 1 8 4 3 6 5 7 2 > Stroke > 1. P C I E P C I E (P=power,C=comp,I=intake,E=exht) > 2. E P C I E P C I > 3. I E P C I E P C > 4. C I E P C I E P > >> > > ------------------------------ From: Clarence Wood Date: Fri, 08 Jan 1999 03:38:00 -0600 Subject: Re: Photo Radar Eric, Is it possible for you to get some of this stuff and sell it to the members of the list? I'd bet that if an individual ordered it they would have to buy a lot more than they needed. At 10:08 PM 1/6/99 -0800, you wrote: >3M makes some stuff they call Louver Film. It comes in a sheet (.062 or >,032 thick) and built like a venitian blind, so restricts the viewing >angle. Opaque off the design axis and clear on axis. We use it in the >dispay biz to control the viewing angle of flat panel displays. >Lotsa Luck Eric >85 GTI with VR6 Power > > ------------------------------ End of DIY_EFI Digest V4 #19 **************************** 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".