Doing 5 speed swap on 91 z/28 350
Thread Starter
Joined: Sep 2005
Posts: 871
Likes: 4
From: Yreka, in the State of Jefferson
Car: 1991 red Z/28
Engine: 350 TPI
Transmission: T5 swap
Axle/Gears: 3.42
Doing 5 speed swap on 91 z/28 350
When I bought my car it didn't have an ecm under the dash. I know being a 91 Z, it needs a 7730 ecm and I still have to buy one. What do I need to do to the ecm and wiring harness to make it compatible with the 5 speed swap so everything works like its supposed to? I know nothing about ecms other than they help the car to run. lol
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From: Chasing Electrons
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Re: Doing 5 speed swap on 91 z/28 350
When I bought my car it didn't have an ecm under the dash. I know being a 91 Z, it needs a 7730 ecm and I still have to buy one. What do I need to do to the ecm and wiring harness to make it compatible with the 5 speed swap so everything works like its supposed to? I know nothing about ecms other than they help the car to run. lol
Odds are it will need some tuning because of the differences between a stick and and an automatic. But that is up to you as to whether it will be worth the effort.
RBob.
Thread Starter
Joined: Sep 2005
Posts: 871
Likes: 4
From: Yreka, in the State of Jefferson
Car: 1991 red Z/28
Engine: 350 TPI
Transmission: T5 swap
Axle/Gears: 3.42
Re: Doing 5 speed swap on 91 z/28 350
Ok thanks RBob!! Once I get to that point I will probably be back here asking more questions 
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Joined: Jun 2010
Posts: 93
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From: edmonton alberta canada
Car: 1991 Z28
Engine: 350 LT1
Transmission: T 56 (converted from 700r4)
Axle/Gears: 4.10 from a 2000 TA
Re: Doing 5 speed swap on 91 z/28 350
I did a swap from an auto to a t5. I didn't do any ECM changes and it seems to run fine. Im curious if there is any noticable differences between the 2 ecms and what they would be?
I bought the ECM for a 350 auto as it has the esc in there and correct me if im wrong these cars didn't come with a 5speed /350 so I think you would be stuck with the auto ECM either way. Good luck you are going to love it after the swap
I bought the ECM for a 350 auto as it has the esc in there and correct me if im wrong these cars didn't come with a 5speed /350 so I think you would be stuck with the auto ECM either way. Good luck you are going to love it after the swap
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