TRW 2329F pistons?
- Thread starter volaredon
- Start date
-
I'll see what I can find.
watching
With any of the old TRW forged pistons I can tell you two things I know about them.
1. They are really heavy
2. They require about .008" piston to cylinder wall clearance because they grow a lot when they heat up.
This causes them to make noise with rocking until they heat up, and they consume more oil than a newer pistons of better material that require less clearance.
However, this was all we had back in the day and they worked fine, so they will still work fine. You just need to make sure they get clearanced correctly and make sure the
engine oil and water temperatures are up before you start hammering on it.
Tom
1. They are really heavy
2. They require about .008" piston to cylinder wall clearance because they grow a lot when they heat up.
This causes them to make noise with rocking until they heat up, and they consume more oil than a newer pistons of better material that require less clearance.
However, this was all we had back in the day and they worked fine, so they will still work fine. You just need to make sure they get clearanced correctly and make sure the
engine oil and water temperatures are up before you start hammering on it.
Tom
Correct on both counts. Having said that, I had a .060 over Chevy 350 about 85 or so. Had the old 12.5 TRW forged domed pistons in it. I had the block first and it was already .060. I knew the forged pistons would be good in it without boring anymore. So I got them NEW from Summit on sale for 99 bucks. It sounded like a diesel until it got warm. But that was one runnin small block. lol It was loose and it would fling like hooker on payday. I had it in a 75 Chevy Monza we put a 12 bolt under.
Forged aluminum flat top with valve reliefs, 1.759 nominal compression distance, weight 592 + or - 10 grams, 1.5 cc total valve reliefs and chamfer, pin weight 154 grams, pressed or floating. Compression depends on deck clearance. Anywhere from 9.9 to 7.7 depending on head cc and deck clearance using a .039 thick head gasket. Not sure on clearance, I doubt recommended clearance is .008.
I believe I still may have a new set
(they would not be very valuable or expensive)
I was going to run then in the wagon BUT
they were set up for pressed pins which is
not how we run our stockers.
Although I guess you could especially if you ran
stock pressed pin rods which would be OK for a
budget Stocker.
I did when I ran them use a much much lighter pin,
the Pins in them are insanely heavy and I could take
off almost 100 grams.
Let me know if you every need help. (My O/SA
318 small valve runs 11's easily in Bracket Tune)
(they would not be very valuable or expensive)
I was going to run then in the wagon BUT
they were set up for pressed pins which is
not how we run our stockers.
Although I guess you could especially if you ran
stock pressed pin rods which would be OK for a
budget Stocker.
I did when I ran them use a much much lighter pin,
the Pins in them are insanely heavy and I could take
off almost 100 grams.
Let me know if you every need help. (My O/SA
318 small valve runs 11's easily in Bracket Tune)
Last edited:
-
