Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

305 Tpi to 350 Tpi

Thread Tools
 
Search this Thread
 
Old Mar 9, 2011 | 10:42 AM
  #1  
rslickster's Avatar
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?
Reply
Old Mar 9, 2011 | 02:51 PM
  #2  
five7kid's Avatar
Moderator
25 Year Member
iTrader: (14)
 
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.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bamaboy0323
Tech / General Engine
2
Aug 15, 2015 07:20 AM
wruiz
TPI
15
Aug 13, 2015 09:07 PM
st.evel07
Engine Swap
5
Aug 13, 2015 06:15 PM
gta power
Exhaust
1
Aug 13, 2015 06:15 AM
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 12, 2015 03:41 PM




All times are GMT -5. The time now is 09:50 AM.