Modern Motorsports Ltd Posted August 22, 2001 Share Posted August 22, 2001 quote: Originally posted by Mike kZ: Originally posted by Ross C: I did see extensive efforts by another fella documented in relocating this sensor but can't find the URL Perhaps I sent it to you a long time ago? A wicked 30's hotrod... Replied by MikeKz: I found it Ross: http://www.sonic.net/~mikebr/main.html Anyone have any idea how to modify the 'maps' as mentioned in the above URL? I can relocate my MAT sensor but some of his closed loop and other adjustments sound v. good......I assume one has to 'copy' the 'maps' from their existing chip into a computer....alter those maps and burn a new 'chip'? I'm pretty clueless on that stuff....anyone here up on it? thanks Thanks for that URL MikeKz, that's the exact one I recalled...wicked documentation he did. Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted August 23, 2001 Share Posted August 23, 2001 Ross I've been in touch with Tom Harp, he knows that guy with the 34 Ford. Tom's got a Chevy II that he mounted the Pro-Flo into. Here is one of the emails from him. Maybe he could burn a chip for you. Mention my name, and my Z car he should remember me. From: Self <CELLBIO/MKRAETZ> To: Tom Harp <tomharp@pacbell.net> Subject: RE: Hello Date sent: Mon, 12 Mar 2001 12:08:23 EST Date sent: Thu, 08 Mar 2001 22:28:05 -0800 From: Tom Harp <tomharp@pacbell.net> Subject: RE: Hello To: 'Mike Kraetz' <mkraetz@cellbio.emory.edu> Mike Hi, Tom I found my chip number, hope it's the same as yours. It's 3523. That the same one I have. If you want I can burn you a chip just like mine, that is a chip with no closed loop idle for an automatic transmission. Or since you have a manual transmission I can also burn one with closed loop idle. Or both, just buy the chips. The closed loop modification is an additional non Edelbrock code change. There are also a few other modifications on this chip but I would have to check my notes to list them all. It has been several months since I worked with the code so I forgot some of changes I made. Well I guess that's why I write things down. I do not have a problem burning you one. I have the code on my PC. All you need to do now is find an electronics store that has 27C256 EPROM chips. The one that comes with the EFI is an AMD 27C256-250 Ceramic EPROM Chip. When I was shopping for blank chips I was only able to find Texas Instruments 27C256-25 chips from Halted Specialties Company (HSC) in Santa Clara, CA. They were $2.95 each. Just for comparison the local high priced Electronics store wanted $9.50 each for them. I think these chips are getting old and might be hard to find so the price might start going up. The -250 at the end of the chip is 250ns speed. Do not get any chips slower than 250ns. If you pick up some chips just mail them to me and pay for the return shipping and I will burn them for you and send them back in your packaging. No charge. I would work with the original chip first. Make sure it is up and working with no bugs. That way if you have a problem with the new chip you can blame it on the chip. What I am getting at is if you have a wiring, injector, fuel delivery, relay or any other hardware problem you might think it is the modified chip and not the hardware. If you decide to do it just email me to let me know. Tom Harp Tom, do you think I need both chips? Like you said I'm running a manual tranny. I found Halted Specialties on the net. If I order the chips, can I send them directly to you? Did you ever figure out the blower roll problem? Thanks again, Mike Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted August 23, 2001 Author Share Posted August 23, 2001 Great stuff! Did you have one burned yet? Now I just wish I didnt' have to unhook the harness/unmount the ECU/unbolt it and remove the old chip(lazy old me!). I have the ZZ4 chip so will have to check the numbers to see if he has that code and decide upon what changes I'd want. FWIW, I have a 'bigger' chip as well if you know anyone in need. Hmm, I know their's at least one guy in a NWFbody list that can burn chips/wonder if it'll do these same chips? Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted August 23, 2001 Share Posted August 23, 2001 No I haven't burned any chips yet, I wanted to see how my car runs first. He calls the surging that you discribed as blower roll encase you were wondering. Give him an email and see if he can help you, he's a nice dude! [ August 22, 2001: Message edited by: Mike kZ ] Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted August 23, 2001 Author Share Posted August 23, 2001 quote: Give him an email and see if he can help you, he's a nice dude! QB] I will, I see Tom notes that their are 2 series of chips now whereby 3512 is 'old' chip and 3522 is 'new' chip that has a forced maximum MAT value to alleviate the 'blower roll'. Only a few chips have been updated from his info. I'll assume mine's an old one....I wrote edelbrock EFI once and their answer was so mundane it seemed pointless. They should offer a free/cheap exchange given they're so cheap to burn. Thanks for defining that term/I have no idea where it comes from.... chip update Quote Link to comment Share on other sites More sharing options...
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