| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
02-17-2026, 06:18 PM
|
||||
|
||||
L2394 Domed Piston Rings
I am wanting to use a set of .030 domed L2394 455 TRW pistons in an engine. I am guessing the ring size to be 1/16 1/16 and 3/16. Can anyone confirm that this is the ring size?
These are the rings that I am considering for the engine: https://www.summitracing.com/parts/TSR-CR3455-30 Should these work for these pistons? Thanks Last edited by John Milner; 02-17-2026 at 06:23 PM. |
|
#2
02-18-2026, 06:16 AM
|
||||
|
||||
|
I would have to confirm that for you this afternoon when I get home to dig out my old TRW catalog, but in general stock 455 pistons where not 5/64 5/64, the 2nd ring was smaller.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#3
02-18-2026, 07:53 AM
|
||||
|
||||
|
Does Summit show TRW/SP pistons for Pontiac?
It should be the same rings for all of them. Seems it was like in your link. Not sure of the oil rings though. 1/16" 1/16" and 1/8" maybe? Could be 3/16" for oil rings but wait for Steve's catalog info I guess. 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
|
#4
02-18-2026, 10:11 AM
|
||||
|
||||
|
Thanks for your replies. That would be great if you didn't mind looking these up in a catalog, Steve. It would be greatly appreciated. These appear to have different ring sizes than some L2359 flat top 455 Pistons that I have. The domed pistons have narrower ring grooves.
|
|
#5
02-18-2026, 10:23 AM
|
|||
|
|||
|
I have a 1999 Speed-Pro catalog.
It has a Power Forged piston listed under Pontiac with these numbers: L2394NF 4.151 bore L2394NF 30 4.181 bore Both listed with the following: 1/16 1/16 3/16 Rings 19.3 Dome Volume .476 Dome 1.500 Comp Dist. 0.0050 Bore Clearance .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 02-18-2026 at 10:29 AM. |
| The Following User Says Thank You to Steve C. For This Useful Post: | ||
|
#6
02-18-2026, 12:59 PM
|
||||
|
||||
|
Great, thank you for that information. I appreciate it. I will go with the Total Seal CR3455 30 rings.
|
|
#7
02-18-2026, 06:14 PM
|
||||
|
||||
|
Here yah go.
Before you order any set of rings measure how deep the ring grooves are in these pistons and call total seal to confirm that there rings will just tuck into the groove.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#8
02-18-2026, 06:32 PM
|
||||
|
||||
|
Thanks Steve, I will measure and will give Total Seal a call. Thanks to everyone who replied and helped. I appreciate the help.
|
|
#9
04-06-2026, 04:32 PM
|
||||
|
||||
|
Just to report back on this in case anyone else has this question, the total seal rings I listed worked perfectly on these pistons and sealed off nicely within the first 5 minutes of breaking the engine in.
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
