Swapping my 305 TPI with an L98
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Junior Member
Joined: Aug 2005
Posts: 2
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From: Oneonta, NY
Car: 1985 Iroc-z
Engine: 305 TPI
Transmission: 700r4
Swapping my 305 TPI with an L98
I was given a motor and a tranny out of an 1987 'Vette, I want to put both into my 1985 IROC-Z. I wanna know how hard it is to swap the motors, I have heard many different answers, some say it's simple some say its a pain in the ***......I can take anything out of the 'Vette I need to make the swap work. PLEASE HELP!!
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Welcome aboard.
It shouldn't be that difficult. It's basically an engine change. I haven't heard the most glowing reports about the '85 TPI computer, and I couldn't tell you if the Vette computer will fit with the f-body harness, or if your harness would be compatible with a later f-body computer. But, I don't think it would be that difficult to sort out.
You may be able to get some information about the computer specifics on the TPI forum.
It shouldn't be that difficult. It's basically an engine change. I haven't heard the most glowing reports about the '85 TPI computer, and I couldn't tell you if the Vette computer will fit with the f-body harness, or if your harness would be compatible with a later f-body computer. But, I don't think it would be that difficult to sort out.
You may be able to get some information about the computer specifics on the TPI forum.
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Joined: Feb 2002
Posts: 1,081
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From: Florida
Car: 1992 Camaro RS
Engine: Yet another 350 TPI
Transmission: Borg Warner 6 spd
Axle/Gears: 3.73
It is alot of work, but none of it is difficult. Its a very straightforward swap. The only thing you need to worry about is that the vette fuel rails will have the lines pointing to the passenger side. Just use the fuel rails from your IROC (assuming your IROC has TPI), and the lines will point to the drivers side.
The vette and camaro both used the 1227165 ecm in 87.
The vette and camaro both used the 1227165 ecm in 87.
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