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C3 Ecm Romless Conversion

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Old Aug 29, 2002 | 12:52 AM
  #1  
funstick's Avatar
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From: great lakes
C3 Ecm Romless Conversion

i hope bruce reads this. bruce i read somewhere that you had a romless conversion on yr GN buick. how is this done. i feel i could get some good code work done on the v6 maf stuff if i had acess to the rom. any help is apprciated. i assume that yr using the j3 edge car connector for this but what i need to know is how is this done ?????? whats involved what eprom do i use is there s shcematic for the adpater etc etc etc. thanx bruce.
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Old Aug 29, 2002 | 06:57 AM
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: C3 Ecm Romless Conversion

Originally posted by funstick
i hope bruce reads this. bruce i read somewhere that you had a romless conversion on yr GN buick. how is this done. i feel i could get some good code work done on the v6 maf stuff if i had acess to the rom. any help is apprciated. i assume that yr using the j3 edge car connector for this but what i need to know is how is this done ?????? whats involved what eprom do i use is there s shcematic for the adpater etc etc etc. thanx bruce.
It involves cutting out the oem socket, cutting a couple traces, installing a 28 pin socket. and adding a few wires. So instead of a 2732 eprom, it uses a 27128, or what I like to use is a 29C256.

What are you working on, or wanting to do?.
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Old Aug 29, 2002 | 04:41 PM
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From: great lakes
i wanna rework the code foe the 1227302 $3a for boost. its alot easier than building a new harness or swapping ecms. ive already checked the actuall maf for flow and itll handle the 255gs/sec as the max value. stock the 2.8 is only drawign about 114gs/sec max. so i fugre that with turbo it should e fairly close to the 255 running about 12-14 psi of boost. in esscen doubling the pressure is gonna double the flow of air. i suspect itll max around aroun 8-9 psi but well see. the engines is sort of breathing challenegd and is very ineffiecent volumetricaly sepaking.
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Old Aug 29, 2002 | 11:36 PM
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From: great lakes
so bruce how do i do this ??
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