Identifying Pistons?

Reply Subscribe

Thread Tools

Search this Thread

Sep 24, 2002 | 11:50 PM

Langadorf

Thread Starter

Pro

Joined: Jun 2002

Posts: 544

Likes: 0

From: La Jolla California

Identifying Pistons?

I'm trying to identify which brand pistons I have and what sorta spec they have. I think they might be TRWs but don't know for sure. The only marking I can see on the top of the pistons are the numbers L2491. There are also some smaller numbers on them but they are different on every piston. The pistons are flat top with 2 valve reliefs. Any help would be appreciated.

Thanks

Sep 25, 2002 | 12:46 AM

gravismaximus

Racer

Joined: Jan 2002

Posts: 308

Likes: 0

From: central square NY

Re: Identifying Pistons? (Langadorf)

did you try calling jegs, or summit and see if the numbers match anything. also just so you now those valve relifes are called eyebrows, good luck :chevy

Sep 25, 2002 | 01:38 AM

jackson

Le Mans Master

Joined: Sep 2001

Posts: 7,739

Likes: 630

From: Unreconstructed, South Carolina

Re: Identifying Pistons? (Langadorf)

Quote:

L2491 is an aftermarket TRW/Speed-Pro forged piston with comp dist 1.430 and is flat top but has minus (-) 3.4cc volume. For a 5.7" rod in 4" bore with 3.75" stroke. Makes 377" or 383" or 388" stroker (depending if they're std or 0.030 or 0.060). 30 over makes 9.5:1 w/ 76cc heads or 10.75:1 w/ 64 cc heads ... also depending on deck height & gasket. Basically a very good stroker piston.

PS with a std 9.025" deck height, this piston will be 0.020" down in the hole.

[Modified by jackson, 12:51 AM 9/25/2002]

Sep 25, 2002 | 03:24 AM

Langadorf

Thread Starter

Pro

Joined: Jun 2002

Posts: 544

Likes: 0

From: La Jolla California

Re: Identifying Pistons? (jackson)

Thanks for the info!

Reply Subscribe