sweenymick

Just a few questions about boring to 3.903 with my 5.3l. When doing so would running the wiseco 464x3903 piston be a good choice when running stock heads that have been ported and polished? I plan on using cali compstar rods 6.125 and my stock crank. With the pistons the have a -3.2 dish and I was thinking of running as thicker head gaskets so the compression stays in the 10 range. Would like to here feed back and if people have done simular things. Thanks

Ping King

iTrader: (20)

I would check the compression height/rod length on that combo. My calculations are showing that your pistons will be in the bore 0.175"

9.240" Deck - 6.125" Rod - 1.83" (3.66 stroke / 2) = 1.285"

1.285" - the compression height of 1.110 on those pistons = 0.175"


To calculate the compression ratio you also need the diameter AND thickness of the head gaskets you're using as well as the chamber size of the heads.

Sales2@Texas-speed

iTrader: (5)

That piston is for a 4.00 stroke. For a stock crank you need K398X3903. The compression height is 1.304 on that piston

RezinTexas

I recommend starting with a 6.0 block. for very little initial cost differential you'll have significantly more cubes. ask me how I know!

http://www.performancetrucks.net/for...2500-a-520418/

garygnu

if you have not bought any parts yet ,consider a ls 383 rotating assembly with a 4" stroke .

sweenymick

Yes that's the part number I meant to put down. Staring and parts all day gets a little overwhelming.

With the 4" stroke can you use the stock crank?

wildcamaro

iTrader: (15)

No sir...stock crank=stock stroke