TRW piston part number help

I picked up a set of 327 .030 over pistons for free the other day. Can ya help me cross the number?

The only number I can find is 1690P.

I have tried Google and TRW's page but not much luck.
Thanks

 

Someone on here works for Federal Mogul, yes?

 

Just going from memory here, but it kinda sounds like a sealed power number, I thought the TRW numbers had an "L" in front of them.

 

from what I remember the "L" prefix was the powerforged pistons only...that 1690P could be another make like sivolite or badger. TRW made stock cast pistons also but I don't have a book.

 

I am only guessing it is a TRW. Could be another brand. It's around 12:1.

 

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I am only guessing it is a TRW. Could be another brand. It's around 12:1.

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I have an old TRW Performance Engine Parts book at home, I'll check it out when I get home from work.

 

I have an old TRW Performance Engine Parts book at home, I'll check it out when I get home from work.


colorado, I asked on this board a long time ago, but still need the info...could you look up the part numbers for TRW 348 chevy piston also? Thanks

 

Much appreciated.

 

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I asked on this board a long time ago, but still need the info...could you look up the part numbers for TRW 348 chevy piston also? Thanks

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Sorry, my catalog is about 20 years old and doesnt list 348/409's .

 

Root,

Ok, that number doesnt come up in the TRW catalog. It really sounds like a SpeedPro / Sealed Power number to me.

The catalog also doesnt have a cross-ref.

BUT, I can give you some info out of the TRW book.

Are the pistons domed?

Any valve reliefs?

Also, what are the CC's of your heads?

 

32viper:

I sent you a PM with some old TRW piston numbers.

(Not sure if that is what you wanted.)

~~~Bruce

 

NAPA catalogue shows a 224-1690 and their numbers are supposedly Sealed Power with a prefix.
"62-69 327. 4" bore. 12.5:1 CP Forged, Length: 3.437", Comp Dist: 1.675", Pin dia: .927". 2 1/16" comp and 1 1/8 oil ring grooves. Note: heads less than 64 cc may have to be modfied for clearance."

 

That sounds just like em HotrodA. Thanks.

 

go to flatlanderracing.com look up pistons they will list trw pistons by # and give you the compression Ratio with different CC combos