Lets say I planned on a s/c or turbo in the future and i wanted to lower the compression on my car (assuming all of the other goodies forged parts etc..) which would be the better way to lower the compression, dished pistons or a bigger cc volume with the heads? How much can you lower the compression with just altering the the cc size of the heads on a LT1??
Thanks for the input and knowledge,
Tony semper fi

 

If you have the "goodies forged parts", then simply order the pistons to fit the application. Even better would be a set of small dish JE pistons with a set of 72cc AFR 220s.

If you try to lower your compression by trying to enlarge the stock casting combustion chambers, sooner or later you'll end up hitting water.

 

Going with a thicker head gasket is another way to get the compression down a tad.

 

but if you go with a sc you dont want a thicker gasket you want a thinner gasket. Best way is larger combustion chambers, and pistions like -30cc dish pistons. It looks to me you want to keep stock heads, so deep dish pistions are the way to roll. As for just lowering cr with just stock lt1 heads not enough.

 

Thinner head gaskets raises compression.

 

Does the words Quench distance mean anything to you people. I know if I was to bolt on a sc I would want a thinner gasket.

 

First of all by your post I guess I assumed that you mentioned that a thinner head gasket would lower compression. And yes I do understand the term "quench distance". Explain to me how is works since you are an expert.

 

you got a bug up your *** guy, I simply correct your misinturptation of my post. No need for your smart *** comments.

 

It is the way you came off. If I mis-interpreted your post than say so. Don't go off assuming that I do not know what quench distance. I think I have learned a little something after 4 years of engineering.

 

Anyways....a proper piston/combustion chamber combination is really the way to go. You can tweak maybe a half a point with a head gasket change, but it pretty much comes down to piston/chamber. And you can't run too much of a piston dish or it weakens the piston. So...if you wanna make serious power, my opinion is a mild dish with some bigger chamber heads such as AFRs.

 

How do you calculate compression with Combustion chamber size, the dish of the piston, stroke, head gasket...? Is there actually a formula or just guess work?
-Tony

 

https://www.camaroz28.com/services/calcs/

it under compression ratio, yes there is a forumla but Im to lazy to type it.