2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

S4 to S5 conversion

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Old Sep 19, 2004 | 10:52 AM
  #1  
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S4 to S5 conversion

Sorry fot the double post but I thought this may get more traffic over here, I have it posted on the Engine mgmt forum anyway.

I have an ITS 2nd gen racecar with a S4 ECU. I would like to convert the electronics to an S5 ecu, maf, OMP and injectors to be able to plug and play a spare S5 motor that I am rebuilding. As a racecar all the emissions have been removed so the harness is down to the maf, injectors, cas and tps.

Can I simply bolt in the S5 ECU and use the S5 harness?
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Old Sep 19, 2004 | 02:43 PM
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The harness pinouts are different..
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Old Sep 19, 2004 | 06:05 PM
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The harness pinouts to what? If I bring over all the S5 attachments ie omp, maf, injectors etc. what pinouts would be wrong?
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Old Sep 19, 2004 | 06:08 PM
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The wiring harnesses aren't compatible.
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