98 ls1 swap into third gen problem
#1
Junior Member
Thread Starter
Join Date: Jun 2010
Location: lansing mi
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91Z28
Transmission: 700R4
Axle/Gears: 3.23
98 ls1 swap into third gen problem
Hey guys i am looking to do a ls1 swap into my 91z28 camaro,however i read that the 98 pcm has problems with pcm limitations?......i dont want to buy this engine if thats the case because the plan would be to build it......can anyone help ?.....thanx!
#2
Supreme Member
iTrader: (30)
Join Date: Sep 2005
Location: O'Fallon, MO
Posts: 6,258
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: 98 ls1 swap into third gen problem
You don't have to use the '98 ECM just because that's what year the engine is. Just make sure whatever year the ECM, the harness is the same.
#4
Supreme Member
iTrader: (7)
Join Date: Jun 2008
Location: Minnesota
Posts: 1,468
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 IROC-Z
Engine: 370 LSX, LS3 Top End
Transmission: Built T-56
Axle/Gears: 9" Aluminum Center 3.89's
Re: 98 ls1 swap into third gen problem
Or you could just swap out to a 99+ like what's in my TA
#5
Supreme Member
iTrader: (30)
Join Date: Sep 2005
Location: O'Fallon, MO
Posts: 6,258
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: 98 ls1 swap into third gen problem
If you use the '98 block just get a newer ECM and harness, and then you'll just need to change a few small things on the exterior of the block like the coolant temp sensor, as the '98 is a different sensor from the '99+ I believe.
#6
Re: 98 ls1 swap into third gen problem
Or you can repin the PCM connectors to use the newer PCMs
98's use a different CTS, but most swaps revert back to it because it is quite handy. The alt wire also changed. They used a dummy light in the 4th gens. Swaps need an inline bulb or 470ohm resistor. 99+ alts are regulated directly by the PCM
Knock sensors had a special connector, but thats contained in the under intake mini harness. It interchanges freely with all GEN III LSx harnesses
They also had the coils mounted directly to the valve covers, so you cant upgrade to the stringer truck coils or use pretty much anything aside from a Fbody coil
98's use a different CTS, but most swaps revert back to it because it is quite handy. The alt wire also changed. They used a dummy light in the 4th gens. Swaps need an inline bulb or 470ohm resistor. 99+ alts are regulated directly by the PCM
Knock sensors had a special connector, but thats contained in the under intake mini harness. It interchanges freely with all GEN III LSx harnesses
They also had the coils mounted directly to the valve covers, so you cant upgrade to the stringer truck coils or use pretty much anything aside from a Fbody coil
#7
Supreme Member
Join Date: May 2004
Location: Kingston, Tn
Posts: 2,924
Likes: 0
Received 1 Like
on
1 Post
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: 98 ls1 swap into third gen problem
Nothing at all wrong with the '98 model motors, I have a 4th gen that's a '98 and it just turned over 184k miles on it (yes it is all stock.....for now) but my 4th gen guru said that anything you can do to a 99+ you can do to a '98.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
NBrehm
Engine/Drivetrain/Suspension Parts for Sale
1
08-25-2015 11:49 PM
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
08-08-2015 08:16 PM