D3 compression ratio

I have a set of D3 heads available I could use for a build, is it possible to get the cr up to about 14:1 with them or would I be better off selling them and buying small chamber heads?

What the CID? Flat tops in a 466 usually get about 9.25-9.5:1 with D3's

Do you have an idea of what the chamber size is or will be after a valve job?

I had 13.5-1 with 95 cc heads, and dome pistons.

ci would be .060 maybe .080 over, stock 460 crank, no idea what the chamber size will be. Just wondering if it is practical to build a high compression engine with the D3 heads.

You need custom Pistons with D3's to get 14:1, Going to need about a +24-30 cc piston.

would you guys recommend using custom dome pistons, or sell the D3 heads and buy dove heads?

I would think that you would be better off just upgrading to a better head with a smaller chamber. The ford racing SCJ head would be a good head for you to check out. small chambers, good flow, updated valve angles and better chamber design. or you could get the P-51's which are very strong heads. JMO.

Maddmattmustangs wrote:I would think that you would be better off just upgrading to a better head with a smaller chamber. The ford racing SCJ head would be a good head for you to check out. small chambers, good flow, updated valve angles and better chamber design. or you could get the P-51's which are very strong heads. JMO.

I know these are good heads, but this is a budget build for a stock class puller that requires oem iron heads

It's going to be a lot easier to get there with the DOVE's, but it'll still take a set of dome pistons. DOVE heads are still relatively easy to come by and affordable.

I dont know what you have done to the heads, or your budget. if the heads are nicely ported, and money is tight, just run em with a 10cc dome. imho

a 10cc dome isnt going to get 14:1 with a D3 Head.

nope but gets him ready for a smaller chamber head in the future.
I dont know the ins and outs of the build but I wouldnt let it make it or break it as far as getting out there. I personally would rather be out there getting last place than watching from the stands. One of my friends ran D3 headed flat top piston 460 for 5 years and seldom if at all seemed to get last place...didnt win either but at least he was out there...fwiw.

true, but if your buying pistons, get what you need.

I'd start atleast with a set of C8's or C9ve.

I owned a set of super nice D3's and after being decked they still CC 94. I believe they are in the 100cc range from the factory. You will just be that much ahead of the curve if you start out with a non emmission cylinder head and smaller chambers.