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Old 07-03-2003, 11:04 AM
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GM forged Pistons made by TRW

I recently started rebuilding a 67 327 and when I gathering up the parts I noticed that I had lost two pistons somehow, These pistons are GM forged Pistons made by TRW, the # on the top of the piston is: #B503 also there is stamped 04 (.040 over?) on the inside of the piston the only markings are: 0.3-99 My budget for this rebuild wont allow for a new set of forged pistons and Id really like to find two pistons to match the six I already have...I have searched everywhere but I cant find anything on these pistons...PLEASE HELP!!!! Im sure someone somewhere has the info that could help me find two more....Thanks in advance, Tim

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Old 07-03-2003, 11:37 AM
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More than likely you have a set of 327-365 horse type pistons ore 327-350 horsepower pistons (which are the same).
Your pistons should probably have a very small dome on them, which will yield about 10.5:1 compression with the 64 CC heads. Actual factory listed compression was 11.0:1, but usually didn't come up that high.
You can get a replacement type piston similar to the ones you have through federal mogul. These will be Speed Pros, which has absorbed TRW. I have a set like this, but they are std bore.
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Old 07-03-2003, 12:18 PM
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Quote:
Originally posted by NAIRB
More than likely you have a set of 327-365 horse type pistons ore 327-350 horsepower pistons (which are the same).
Your pistons should probably have a very small dome on them, which will yield about 10.5:1 compression with the 64 CC heads. Actual factory listed compression was 11.0:1, but usually didn't come up that high.
You can get a replacement type piston similar to the ones you have through federal mogul. These will be Speed Pros, which has absorbed TRW. I have a set like this, but they are std bore.
Yep, after spending most of the day on the phone, I found that these pistons are Badger forged pistons...the Speed Pro Cross # came up as L2166NF40, I must say these guy's were great and really took the time to find what I had..I spent alot of time listening to that "elevator" music but it was worth while...even though 47.75 each is pretty high, at least I wont have to spend 400, on the set....If you have any problems like the one I had, call 1-800-325-8886 and they will tranfer you to the appropriate people...Cudo's for speed pro and long live my 327!!!!!!
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Old 07-03-2003, 02:37 PM
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NAIRB RIGHT AGAIN

JUST FOUND THIS OUT LIKE Yesderday in hot rod. NO MORE TRW. NOW SPEED PRO, like nairbee said!
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Old 07-03-2003, 03:44 PM
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You might want to check the weight on the replacements.

Troy;
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Old 07-03-2003, 07:58 PM
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off topic--Is that Camaro near your name the same one I have seen in the world of wheels a couple years ago?
CAD
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Old 07-04-2003, 08:23 AM
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Cad;

Yep it is the same one,I finally won the Grand Championship in 98.
They said I couldn`t do it on my budjet, but I did.
What shows did you go to, did I meet you?

Check out my albumn.

Troy;
69s Forever;
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Old 07-04-2003, 11:18 AM
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They're making better pistons these days. You should consider replacing them as a set
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Old 01-15-2009, 07:07 AM
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identifying pistons??

can anyone tell me wot these pistons are plz in the engine photo / are these two types the same other is a L2166NF .. 327 thks the ones in the engine look deeper or is that my welders eye sight
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Old 01-15-2009, 08:19 AM
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pistons

, darn it u got to laugh

Last edited by neilyo; 01-15-2009 at 09:31 AM.
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Old 01-15-2009, 09:43 AM
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pistons

hey man is that wot these are //??? trying to identify thx ,.. the dome height is 4mm
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Old 01-15-2009, 10:24 AM
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The thread merged here is over 5 1/2 years old.

I have no idea what your question is here.....
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Old 01-15-2009, 10:29 AM
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piston

sorry man ive got a 327 and im trying to identify my pistons they look like the ones in the pkky but im getting no joy thats all
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