98z28CamaroJG

iTrader: (7)

I'm building a 383 good for 500rwhp N/A, set up for road coarse racing, but capable of 10sec 1/4 miles. In the 383 rotating assemblies i'm looking at there is either a -4cc or -6cc dish piston option. What does the difference in cc mean/do and which would be better for my build? Thanks!

Black89Z51

iTrader: (2)

That tells you whether it is a dished or domed piston. The different cc's will move your compression up or down, depending on which way you go. You need to figure out your desired compression with the heads you want.

You really need to be talking to an engine builder if this kind of stuff puzzles you. Your other thread about reluctor wheels included. These types of differences can end up costing you big time if you get it wrong.

98z28CamaroJG

iTrader: (7)

I'll be calling a builder soon, I just wanted to get together a rough idea of what I want before I call them and say...hey walk me through this for 3 hours I have no idea what anything means...haha. Thanks for the awesome information again!

RezinTexas

I'm building a high compression (11.3 ish) 383 and here the primary variables for calculating compression ratio:

-3cc dish pistons
-.010 piston deck height
.040 head gaskets
64.5 cc head volume

Pumba

Go the following website and enter the particulars of your engine. You can vary the piston volume and it will show you how it effects your compression ratio:


http://www.kb-silvolite.com/calc.php?action=comp

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98z28CamaroJG

iTrader: (7)

Thanks for the info RT and good luck on your build!

Now that's a cool calculator right there, thank you