Stock internals
Thread Starter
Heel & Toe
Joined: Apr 2025
Posts: 21
Likes: 15
From: Winder, GA
Stock internals
Have some quick questions.
What are the stock internals of a 92 LT1 i thought I read somewhere they cone with forged internals.
What rpm can you safely spin then to if you do the all the intake track mods?
What is a good set of 1.6 roller rockers that would just be bolt on?
Does anybody still tune these or would the only option be an off the shelf chip?
What are the stock internals of a 92 LT1 i thought I read somewhere they cone with forged internals.
What rpm can you safely spin then to if you do the all the intake track mods?
What is a good set of 1.6 roller rockers that would just be bolt on?
Does anybody still tune these or would the only option be an off the shelf chip?
Drifting
Joined: Oct 2004
Posts: 1,476
Likes: 80
From: Hawaii
Stock internals of the LT1 are shown here.
https://www.grandsportregistry.com/lt1vslt4.htm
Only thing different is 1992-1994 LT1 had forged rods, 1995-1997 had powdered metal rods.
Roller rockers, get a set of quality 1.6 narrow body, self aligning roller rockers. Usually you will have to trim the drip tabs in the valve cover to install the rockers.
For tuning.
https://www.pcmofnc.com/product-cate...tte-1986-1993/
https://www.grandsportregistry.com/lt1vslt4.htm
Only thing different is 1992-1994 LT1 had forged rods, 1995-1997 had powdered metal rods.
Roller rockers, get a set of quality 1.6 narrow body, self aligning roller rockers. Usually you will have to trim the drip tabs in the valve cover to install the rockers.
For tuning.
https://www.pcmofnc.com/product-cate...tte-1986-1993/
Race Director
Joined: Sep 2001
Posts: 14,641
Likes: 749
From: NEwhere Ohio
i wasnt sure if it was 1994 or 1995 when they switched
they went to the powdered metal rods bc they were easier (and prob cheaper) for their supplier to produce the 500000 a year or so they needed for all the lt1 engines
they went to the powdered metal rods bc they were easier (and prob cheaper) for their supplier to produce the 500000 a year or so they needed for all the lt1 engines
Advanced
Joined: Mar 2024
Posts: 76
Likes: 20
From: Dayton
I agree with James, but you'll also need a good valve spring. The right combination of parts will bring up the peak power on the stock motor. I dialed my 1993 lt1/4l60 in '05 at 6k rpm on an auto. Been that way for two decades. Alvin for the tune.
