DIY_EFI Digest Friday, 12 January 1996 Volume 01 : Number 008 In this issue: Re: Re: Ford Sierra Cosworth ECU Prom Re: Adjustable electronic ignition MAP sensor calibration RISC microcontrolers for efi Re: Adjustable electronic ignition Re: RISC microcontrolers for efi See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Clint Sharp Date: Wed, 10 Jan 1996 17:34:17 GMT Subject: Re: Re: Ford Sierra Cosworth ECU Prom In your message dated Tuesday 9, January 1996 you wrote : > This is all very interesting. Are your Ford Electronic engine controls the > same > as FoMoCo of Usa EEC IV system? > > I would be interested in seeing data about your Ford ECU proms. > > > Kirk Davies > No, sorry, the EEC-IV ECU is a radically different beast although there are performance chips available for that unit in the UK at least. - -- We apologise for the lack of coherent humorous comments. Normal service will be resumed shortly. clint@xxx.uk ------------------------------ From: Craig Pugsley Date: Fri, 12 Jan 1996 09:52:53 +1100 (EST) Subject: Re: Adjustable electronic ignition > >Just a quick question, > > My Holden Commodore runs a Buick 3.8 litre > >V6 and uses a crankshaft sensor for the ignition timing. What I want to do > > Adam, > you can use a Haltech IG4 programmable ignition timing computer to > control the timing on your Commodore. It will give you even more load points > than the factory! plus data logging, etc. I guess it's not exactly a DIY > solution but I thought I would let you know it can be used in that way. > regards, > Mark Boxsell > MRB Design Also, haltech now have an F5GM which plugs straight into a VN/VP loom (& probably any other GM car running a P3 computer, but you'd have to check). One would presume that as it replaces the whole ECU it would do ign timing. Cost is around $aus 1200 (~us 870) Cheers, Craig. ------------------------------ From: eric_e@xxx.com (Eric Elliott ) Date: Thu, 11 Jan 1996 18:29:24 -0800 Subject: MAP sensor calibration These two pages contain calibration data for five models of intake manifold pressure sensors. The data was given to me, accuracy is not known. Sorry if the data is not formatted best for you. Not knowing the standard format, I used tabs for easy editing. Will format to suit and resend as directed! Eric Elliott - ----------------cut here--------------------------------------- GMC EFI engine MAP sensors calibration data, page one Input model 460 model 835 model 834 IN Hg output VDC output VDC output VDC 0 4.620 4.602 0.560 - -1.0 4.442 4.424 0.741 - -2.0 4.264 4.249 0.923 - -3.0 4.086 4.075 1.105 - -4.0 3.908 3.899 1.287 - -5.0 3.73 3.724 1.469 - -6.0 3.552 3.548 1.652 - -7.0 3.374 3.370 1.834 - -8.0 3.196 3.195 2.016 - -9.0 3.018 3.019 2.199 - -10.0 2.84 2.842 2.380 - -11.0 2.662 2.667 2.562 - -12.0 2.484 2.485 2.745 - -13.0 2.306 2.303 2.928 - -14.0 2.128 2.121 3.111 - -15.0 1.95 1.940 3.293 - -16.0 1.772 1.758 3.475 - -17.0 1.594 1.577 3.657 - -18.0 1.416 1.395 3.840 - -19.0 1.238 1.219 4.022 - -20.0 1.178 1.043 4.204 Connector green red gray output wire green green green sensor 0 to 28"Hg 0 to 28"Hg 0 to 28"Hg range direct acting direct acting reverse act. output volts 0.175V 0.178V 0.182V per inch Hg. input GMC EFI engine MAP sensors calibration data, page 2. Input model 833 Input model 886 ? output VDC IN H2O output VDC 0 4.629 0.0 2.347 0.1 4.612 0.5 2.435 0.2 4.593 1.0 2.522 0.3 4.575 1.5 2.610 0.4 4.557 2.0 2.698 0.5 4.539 2.5 2.786 0.6 4.521 3.0 2.874 0.7 4.502 3.5 2.961 0.8 4.484 4.0 3.049 0.9 4.466 4.5 3.136 1 4.448 5.0 3.224 1.1 4.429 5.5 3.312 6.0 3.395 sensitivity sensitivity 0.182V/inch Hg 0.175V/inch Hg Connector blue Connector yellow output wire gray output wire green wire stripe black trace wire stripe ?? sensor ??? sensor -25" to +9# range reverse act. range reverse act. Data was given in inches water for the 886. Unit of measure were not specified for the 833. Possibly the data represents about 0.18 volts output per inch mercury pressure input for both 886 & 833. ------------------------------ From: "Clinton L. Corbin" Date: Thu, 11 Jan 96 19:31:30 PST Subject: RISC microcontrolers for efi Folks, Just wandering if anyone has looked at he newer PowerPC based microcontrollers from Motorola and IBM. How well would they work for a efi application? It appears that both companys are pushing (and supporting) these chips pretty hard. Anything that would make them very difficult (or very expensive) to use an efi application? How good are the supporting chips? Any comments? Clint ccorbin@xxx.com Needless to say, my comments do not represent my employer in any way. ------------------------------ From: masmith Date: Thu, 11 Jan 96 22:39 PST Subject: Re: Adjustable electronic ignition At 10:16 PM 1/10/96 -0500, you wrote: >Design a bracket for the pick-up unit so that it can be advanced (turned >counter-clockwise relative to the front of the crank shaft) from the original >position. > >See ya, > >Mike > now thats thinking - its rmp independent and everything. Matt Smith - rocket scientist. - seriously. Matt Smith masmith089@xxx.com Mailer Eudora 1.5.2 ------------------------------ From: arthurok@xxx.com (ARTHUR OKUN ) Date: Thu, 11 Jan 1996 22:47:18 -0800 Subject: Re: RISC microcontrolers for efi You wrote: > >Folks, > Just wandering if anyone has looked at he newer PowerPC based >microcontrollers from Motorola and IBM. How well would they work for a efi >application? It appears that both companys are pushing (and supporting) these >chips pretty hard. Anything that would make them very difficult (or very >expensive) to use an efi application? How good are the supporting chips? >Any comments? > >Clint >ccorbin@xxx.com Needless to say, my comments do not represent > my employer in any way. > other than the high prices at the present time they should work great i bet in five years or so they will be the standard of the industry for many applications ------------------------------ End of DIY_EFI Digest V1 #8 *************************** 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".