DIY_EFI Digest Thursday, August 26 1999 Volume 04 : Number 490 In this issue: Wide range O2 sensor Re: 1226870's and eprom UPDATE Mime-Version: 1.0 See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Thu, 26 Aug 1999 05:42:33 -0700 From: garfield@xxx.com (Gar Willis) Subject: Wide range O2 sensor On Wed, 25 Aug 1999 12:06:50 -0700 (PDT) Orin Eman wrote: >Speaking of EGOR, is he ready yet? > >Orin. If he was, you'da heard about it right here onlist. All we're saying, either public or private, is "soon". Please yous guys don't be asking me via private email for any inside scoop; it ain't gonna happen that way. All product announcements, schedules, pricing, etc. will be POSTED here onlist. NO stealth info will be given out via private email. After EGOR is announced, there will be a private list called "EIOsig" (the sig stands for 'special interest group') clients will be joined on to automatically (unless you wish not to be), for support and continued tech discussion. Hey, if yous guys'll agree to the charter and stick to EFI topics, you can depart this digest crap (nuthin personal, Orin :) and expand the topics beyond EGOR and ION to general EFI. But JUST EFI, thank you, and NO chat-monkey's like that "!!" guy, OK? :) Gar ------------------------------ Date: Thu, 26 Aug 1999 04:46:19 -0800 From: Ludis Langens Subject: Re: 1226870's and eprom UPDATE Mike Poore wrote: > I successfully copied my stock prom to a new eprom without a hitch. If I > change one parameter it won't work correctly. The ses light flickers. Someone > mentioned a problem with the checksum. > > Is there a difference between the checksums for a TPI Camaro and Vette? The checksum will change with any change in the EPROM. If the Camaro and Vette have different data, the checksum will likely be different too. > How can I find out how the checksum is calculated using my stock bin? For the 6870, the first two bytes of the EPROM contain the 16 bit (big endien) sum of all the other bytes. > Is there a way to bypass this problem and disable checksum? Changing location 5 from $1F to $AA, will probably disable checking of the checksum. This is sometimes called experimental mode. I don't like it because it leaves no way to know if the data has been corrupted. - -- Ludis Langens ludis (at) cruzers (dot) com Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/ ------------------------------ Date: Thu, 26 Aug 1999 07:26:29 -0700 From: neilaura@xxx.com Subject: Mime-Version: 1.0 Subject: Re: Idiot qestions for lazy newby Bill Shaw Wrote: > I don't think you said what type of car it is, Groan... I figured that would rear its ugly head! You are quite right, I didn't say... because I didn't want to be laughed out before I was ever in, and even I have a certain amount of pride. No, I don't think I'm going to let you people do that to me. The car is my business, thank you very much. The engine... oh, screw it. You people will laugh at me anyway, so I might as well... The engine is a Lotus 907E. Just to put the record straight, Lotus used the bottom end of exsisting production engines and used their own heads and cams. In the case of your engine, it was the Ford (you have my sympathy). But take some consolation, the other option was the French Renault. Basically it is your textbook modern econobanger, except it came from England, so it doesn't work most of the time. Canted, DOCH, 16V, 2L, redline somewhere around peak HP... a nice little engine if you don't mind the little things like needing to break your wrists to reach the distributor. Looking through the list archives I notice at least one other person was interested in EFI for it, but I think he was buying an aftermarket system. It has a pair of nifty thingimawhatsit carbs... a rather snazzy design if you are into such things, sort of a MAP sensor and throttle body with mechanical feedback system to balance the air flow against fuel flow. You don't actually control the throttle, you richen the mixture, and it regulates based on MAP... at least that's how I understand the damn things. They were designed for emissions. Anyway, they are British, and I don't need to tell any of you what that means. I'm British, please explain what it means. Neil ------------------------------ End of DIY_EFI Digest V4 #490 ***************************** 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".