what the diff lt1 and lt4?
Thread Starter
Pro
Joined: Feb 2005
Posts: 654
Likes: 4
what the diff lt1 and lt4?
ok so whats the difference from a 95lt1 6spd and a 96lt4? cam/rockers? whats the diff parts wise and whats the diff power wise. how much faster is a stock lt4 to a stock lt1? ive read you can make a lt1 an lt4....how, how much and how invalved is it.....is it worth the time and money?
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
The major differences between the LT1 and the LT4 is in the heads and intake The LT4 has raised runner heads that flow more than the LT1s and the LT4 comes with 1.6 roller rockers, whereas the LT1 has 1.5 stamped rockers. The LT4 also has a different crank, rods, and cam as well.
You can put an LT4 topend on an LT1, but it's usually cheaper, and makes more power, to have your current LT1 heads and intake ported and put in a nice cam, such as the LT4 HotCam.
The LT4 was listed from GM at 330HP, however most think that it was underrated, and it more likely putting out around 350HP. Most LT4s dyno around 295-305RWHP in stock form.
Some people have taken a stock LT4 into the 12.8 range in the 1/4 mile, but that's kind of rare. I wouild say most are in the 13.0-13.3 range...but of course that's more driver dependant than anything else!
Here's a link to get a better idea of the differences between them;
http://www.grandsportregistry.com/lt1vslt4.htm
You can put an LT4 topend on an LT1, but it's usually cheaper, and makes more power, to have your current LT1 heads and intake ported and put in a nice cam, such as the LT4 HotCam.
The LT4 was listed from GM at 330HP, however most think that it was underrated, and it more likely putting out around 350HP. Most LT4s dyno around 295-305RWHP in stock form.
Some people have taken a stock LT4 into the 12.8 range in the 1/4 mile, but that's kind of rare. I wouild say most are in the 13.0-13.3 range...but of course that's more driver dependant than anything else!
Here's a link to get a better idea of the differences between them;
http://www.grandsportregistry.com/lt1vslt4.htm
Last edited by Zix; Sep 30, 2005 at 04:09 AM.
Team Owner
Joined: Sep 2001
Posts: 62,153
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Read the link from the GS registry, its the best of the ones I've found. Most of the difference is in the heads/cam.
LT4 is usually about .3-.5 faster, if you look at the average.
LT4 is usually about .3-.5 faster, if you look at the average.
