richard

Hi

I am having a job finding and identifying the pistons in my 350 twin turbo chevy's.

Unfortunately I need 2 of them, as water got in my engines over winter, from a bad cover.

The only ident on them seems to be "400F" printed on the inside, and it looks like some ID has been milled out on the under side, for which I dont know why.

I think the pistons are forged as they come out of a twin turbo application, and dont want the expence of new ones, as balancing is an issue, which would cost me a fortune as no one does it on my Island.

Also there is the issue of piston weight. These are heavy pistons. I will re weigh them tonight on some electronic scales. Ive only used a set of my moms cooking scales to weigh them so far, and they came out at 0.520kg with wrist in of 0.140kg totalling 0.660kg. Finding a weight match is near impossible as these are heavy and made around 1979- 1983.

Please have a look at the pics, and if any thing springs to mind, please post it.



Thanks

Ric

richard

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richard

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Crazyhorse

the milling you've noticed on the inside is most likely the work of the engine balancer, so that all the pistons weigh the same. I'm sure that when you find the new pistons you'll want to machine them to the same weight as the old ones.
Speed Pro offers a forged piston,around 8:1 compression depending on the cylinder head volume, that has the D-shape top like the one you have, L2441F, and L2441F30 (.030 overbore), but that's the best I can do. Hope this helps. Dave

carreraboat

i had the same number on my srp pistons my guess would be to weigh them and measure them then contact srp and see what tey have to match