I am having a motor build for my F350 4x4 4-spd. The engine shop says he can't find any pistions with a dish bigger than 22cc so that the compression ratio can be brought down, alowing me to us my D0VE heads and run on pump gas. I do have another 460 with a set of D3VE heads on it which he wants to use.

Is there any main difference between the two heads besides the cc's of the combustion chamber.

The rest of the build-up lists as:
-466 bored out
-Steath Intake
-ported heads w/ D0VE stock valves
-Comp cams extreme 4x4 cam (218/226 @.050 and .514/.524)
-600cfm Holley for now, possibly 770cfm truck avenger
-compression ratio in the low 9's
-Stock exhaust manifolds (need manifolds that last) w/ 2.5" exhaust

With this set-up he said the motor should have over 500tq and 380+ horse.
The truck needs to be daily driven, have plenty of pulling power and to run on regular unleaded for now.

Thanks again for you opinion and time.
Mudman

 

I would question that.. What are you looking for, cast or hyp, forged ? You also need to take into consideration deck height, which can vary 20 thousandths, and greatly affects compression ratio and quench. A lot of this has been covered about quench and detonation relationship. I think you would be better off with the Dove heads. Keith black list different pistons for early and late blocks because of pin height and deck height changes. Dig a little deeper before changing your plans.

 

I am running the D3VE's on my engine. The biggest differance other then combustion chamber cc'c, is the rocker arm mounts are bolt down and the smog passages are drilled for the bumps. I looked around for a set of dished pistons for my engine to use the D0VE's and I couldn't find anything to bring my compression down low enough. So I opted for squaring the block and milling the heads for rocker studs and a smaller combustion chamber. I have a 9.5-1 CR. But I also have flat top pistons and 2.19 I and 1.76 E valves.

 

I agree with that. I don't have the time to do a search but have used DOVE heads with 460 pistons for 9.5:1 c/r in the past.

For your application, I see nothing wrong with using D3 heads.

 

If you are using a later model block (taller deck height) and stock-type later model pistons, then the smaller combustion chambers on the D0VE's will be perfect. It will put you in the neighborhood of 9.4-9.5:1 depending on exact CC size, amount of milling, etc. If you are trying to put flat-tops in with D0VE's then your CR will be too high. What is your deck height and what pistons were you looking to use. What is your budget for pistons??

JJ