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Questions and suggestions about swapping a older l98 into a 91 rs

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Old Feb 18, 2018 | 08:31 PM
  #1  
88irocz91rally's Avatar
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From: Covington,Ga
Car: 1988iroc z and 1991 Camaro Rs
Transmission: 4 speed and 5 speex
Questions and suggestions about swapping a older l98 into a 91 rs

So I have a l98 from a 88 iroc with its older computer and harness and a 6 speed from a 95z. Swapping into a 91 rs with a 305 5 speed. My question is would I be better off using my tbi harness and finding a speed density computer or just use the older computer and harness?Anyone due a similar swap? have some tips?
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Old Feb 19, 2018 | 06:54 AM
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Re: Questions and suggestions about swapping a older l98 into a 91 rs

You'll need to use the L98 harness and it'll be easier to use its ECM as well.
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Old Feb 19, 2018 | 09:53 AM
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From: Orange, CA
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Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Questions and suggestions about swapping a older l98 into a 91 rs

That would take a lot of work to make an '88 harness work on a'91
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Old Feb 19, 2018 | 02:45 PM
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Re: Questions and suggestions about swapping a older l98 into a 91 rs

I'd either find a 91 TPI harness, mod the TBI harness, or find a 3.1L harness and mod it. Of course all of these options mean sourcing a 7730 ecm and the TPI memcal, which isn't easy to come by.
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Old Feb 19, 2018 | 02:57 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
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Axle/Gears: J65 pbr on stock posi 10bolt
Re: Questions and suggestions about swapping a older l98 into a 91 rs

https://www.thirdgen.org/forums/engi...d-density.html

You can allways get the memcal reprogrammed if it’s for a automatic.
As long as it’s not all spliced that’s a great deal for the harness and ecm.
Being from a bird some of the connections might be short like the ccp.
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Old Feb 19, 2018 | 06:48 PM
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88irocz91rally's Avatar
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From: Covington,Ga
Car: 1988iroc z and 1991 Camaro Rs
Transmission: 4 speed and 5 speex
Re: Questions and suggestions about swapping a older l98 into a 91 rs

Thanks everyone for the imput!
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