305 Tpi to 350 Tpi
Thread Starter
Junior Member
Joined: Jun 2010
Posts: 26
Likes: 0
From: North Carolina
Car: 1986 IROC Z28
Engine: 87 Small Block Roller Motor
Transmission: 700R4
Axle/Gears: 2.73
305 Tpi to 350 Tpi
I have a 1986 Z28 Tpi 305 and want to put a 1988 350 Tpi in. Will the Harness work for the 350. I think the computers are the same and i would have to use the 350 chip. Both are automatics. What else would i have to have?
Joined: Mar 2000
Posts: 43,187
Likes: 43
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
The harness is the same. In fact, all hardware is the same except for injectors and knock sensor.
And, in '87 they went to a different intake mount bolt angle for the center two bolts on each side. You can either buy an aftermarket base for '87-up pattern, or trade your '86-earlier base for someone's '87-later base. If you're getting the all of the '88 TPI hardware with the engine, never mind...
350 knock sensor & module, and injectors, are also different from their 305 counterparts.
Other than that (and the 350 chip you mentioned), you shouldn't have any issues.
And, in '87 they went to a different intake mount bolt angle for the center two bolts on each side. You can either buy an aftermarket base for '87-up pattern, or trade your '86-earlier base for someone's '87-later base. If you're getting the all of the '88 TPI hardware with the engine, never mind...
350 knock sensor & module, and injectors, are also different from their 305 counterparts.
Other than that (and the 350 chip you mentioned), you shouldn't have any issues.
Thread
Thread Starter
Forum
Replies
Last Post
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 12, 2015 03:41 PM