oem piston deck clearance

[br549]

anyone know what the stock piston deck clearance is on a 10 ????

 

[rottenronnie]

anyone know what the stock piston deck clearance is on a 10 ????

Normally it should be .030 down the hole.

 

[Ironhead]

i and br are trying to figure compression ratio on me sled ,and what is the best gasket size to get me on 10.8 to 1 ratio


I pulled my heads and checked them ,they are 72 c.c
here is a pic of my piston build from wiseco
the math is giving me a brain fart

 

[rottenronnie]

i and br are trying to figure compression ratio on me sled ,and what is the best gasket size to get me on 10.8 to 1 ratio


I pulled my heads and checked them ,they are 72 c.c
here is a pic of my piston build from wiseco
the math is giving me a brain fart

The new style (Gen IV) gaskets are .038" crushed.
As for your final ratio, it depends how far down the hole your piston is. If you are using the stock length rod and your piston is .-030", you will be very close to your target of 10.8.
Phone Tony, he should be able to tell you about what he sold you.??.

 

[Ironhead]

cant be ,,using this calculator that would be way more than your saying .And Tony is off the grid today lol

Engine Compression Ratio (CR) Calculator

 

[rottenronnie]

cant be ,,using this calculator that would be way more than your saying .And Tony is off the grid today lol

Engine Compression Ratio (CR) Calculator

Well then you aren't using a flat-top piston..

If you were using those, and you have a stock length rod, "close to" a stock bore and you have a 72cc chamber and you are using the newer style Gen IV gaskets, the calculations are accurate.

If you are using some kind of a domed piston then yes, you answered your own question: Your compression ratio is higher than 10.8:1

 

[yellowfever#154]

Don't cha think you shoulda had this figured out before having pistons made?

 

[Ironhead]

Don't cha think you shoulda had this figured out before having pistons made?

Thanks for the smart elic remark .
Fact is i did ,,then I happen to get a set of striker heads that changed everything ,but i had already received the pistons .:chain: