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is a 90 corvette ZR1 the same ecm as a 90 third gen???

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Old Jul 31, 2009 | 02:06 PM
  #1  
slickfx3's Avatar
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From: So Pasadena, CA
Car: 1989 Chevy Corvette
Engine: 383 SuperRam 10.7 AFR 195 220/229
Transmission: Fancy Smansy 87 Corvette 700r4
Axle/Gears: 3.33
is a 90 corvette ZR1 the same ecm as a 90 third gen???

thanks
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Old Jul 31, 2009 | 03:29 PM
  #2  
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From: Chasing Electrons
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Re: is a 90 corvette ZR1 the same ecm as a 90 third gen???

Most likely they are not the same. I know that from '91 and newer the ZR-1 ECM's are not the same as used in the TPI cars.

If the '90 ZR-1 is SFI, which I believe all ZR-1's are, then it is a different ECM then the '90 TPI. The TPI ECMs are all batch fire.

RBob.
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Old Jul 31, 2009 | 04:12 PM
  #3  
slickfx3's Avatar
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Joined: Dec 2008
Posts: 145
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From: So Pasadena, CA
Car: 1989 Chevy Corvette
Engine: 383 SuperRam 10.7 AFR 195 220/229
Transmission: Fancy Smansy 87 Corvette 700r4
Axle/Gears: 3.33
Re: is a 90 corvette ZR1 the same ecm as a 90 third gen???

Originally Posted by RBob
Most likely they are not the same. I know that from '91 and newer the ZR-1 ECM's are not the same as used in the TPI cars.

If the '90 ZR-1 is SFI, which I believe all ZR-1's are, then it is a different ECM then the '90 TPI. The TPI ECMs are all batch fire.

RBob.
i just found out they are the memcals and everything just the mask , etc are diff, as is with all our cars...
thanks for your help!
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Old Aug 1, 2009 | 07:27 AM
  #4  
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From: Chasing Electrons
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Transmission: check
Re: is a 90 corvette ZR1 the same ecm as a 90 third gen???

The '90 & '91 ZR-1 used the 1228331 ECM.
The '92 through '95 ZR-1 used the 16163993 ECM.

Which neither of is used in a TPI setup.

The MEMCAL may be interchangeable. But as you mention the mask/code is completely different.

RBob.
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Old Aug 1, 2009 | 10:20 AM
  #5  
slickfx3's Avatar
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Joined: Dec 2008
Posts: 145
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From: So Pasadena, CA
Car: 1989 Chevy Corvette
Engine: 383 SuperRam 10.7 AFR 195 220/229
Transmission: Fancy Smansy 87 Corvette 700r4
Axle/Gears: 3.33
Re: is a 90 corvette ZR1 the same ecm as a 90 third gen???

Originally Posted by RBob
The '90 & '91 ZR-1 used the 1228331 ECM.
The '92 through '95 ZR-1 used the 16163993 ECM.

Which neither of is used in a TPI setup.

The MEMCAL may be interchangeable. But as you mention the mask/code is completely different.

RBob.
yes, the memcal's contents will be scrapped, bin read into tunerpro manipulated, for hardware changes....

again thanks!
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