Rusty same number ,s 4 the 8

 

Well there ya go! Bore that puppy out to 4.050" and dont look back.

 

Thank you rusty for all your help on this one and yes i will be bore it out to 4.050 i will have to inport the pistons just chaseing up your choice of piston
now i can,t wait to hear it running in the old truck

 

Just to clarify you are looking for the Silvolite 1131 pistons, right?

 

yes i was looking for 1131 at there site i found 3144,3142 still looking for 1131

 

I found them 1131 they look better nices compress so they will go in ok ? with the deck height ? im still look for a 391 crankshaft over here the 1131,s will they go in if i find a 391 crankshaft ? i have ask beck raceing for a price to ship to australia just wait for a reply

 

If you're using the 330 bottom end, then yes it will work. You'll have the same deck height as an FE 360.

I just found this:

http://www.beckracing.com/slvpg50.htm

That link has specs on Silvolite pistons. It looks like you could build about the best compression in that motor with a number 3137 piston, if you can find one and the specs they list are correct. This is also an option for people wanting to build an FE 360 as it would give better compression than the stock pistons.

Edit: Those 1131 pistons would be perfect with a 391 crankshaft and rods! You need to find the rods to go with it however to make it work.

 

Rusty would the rods part number be c6ae-c ? if so they are in on the crank now as stock rods the 330 has two set of rods short and long i have both the one,s in the block are 6.488 part number c6ae-c ?

 

Oh those are short rods! All you need is the 391 crank.

So now, if you're building the 361, you'd want the 3144 pistons. Dont use the 1131 pistons in the 361, as they'll be too far below deck to give decent compression. If we assume 80cc chambers in those FT heads, and a standard Fel-Pro head gasket, with the 3144 pistons you would have 7.23:1 compression, which is stock FT 361 compression.

OR your other option to building the 361, is to use the long rods and a set of 3137 pistons. If we assume 80cc chambers in those FT heads, and a standard Fel-Pro head gasket, with the 3144 pistons you would have 7.92:1 compression. This is the way I'd go for building the 361.

If you're building the 391, then you want the 1131 pistons with your short rods. If we assume 80cc chambers in those FT heads, and a standard Fel-Pro head gasket, with the 1131 pistons you would have 8.7:1 compression.

OR your other option to building a 391 is to use a set of TRW / Speed Pro L2291 forged pistons. This would add a lot of strength to your motor. They would also add some compression. If we assume 80cc chambers in those FT heads, and a standard Fel-Pro head gasket, with the L2291 pistons you would have 8.92:1 compression. They are forged and do cost more though, but I think they would be perfect in a truck motor where added strength is a benefit.

It would probably be worth your time to track down a 391 crank.

 

hi rusty what rings do i need becking racing want to no if i want a 4 ring piston or a three ring piston ,do i need a iron top ring ?
i ask if he ships to australia they do

 

So you're still building the 361? I really dont think the iron top groove or the 4 ring pistons are essential for what you're doing.

The rings are listed on this page:
http://webpages.charter.net/beckracing//slvpg50.htm

 

thanks rusty , so what the 4th ring use for ? i get ther new oil pump this week ill tell alan beck the 1131 = piston and ring ok

 

Whoa! If you're building a 361, the 1131 is not the piston to use! In that case, you want the 3139. If you are building the 391, then use the 1131.

 

ok still can,t find a truck crank any where over hear so 3139 ,s

 

I mistyped the number above! You want 3144 pistons, not the 3139. Either would work good however, so if you already ordered it's not that big of deal.