group buy! Wiseco Pistons

[AveoSSSupercharged]

ok. i would say put me down for 8.5 and 79mm then. i should have the money by the end of the month.

[khan4rtist]

hmm.....is there a way to calculate compression ratio with a thinner gasket? im thinking of getting the thinnest one you have which is the .030, also, is there any danger of the piston hitting the valves with the thinner head gasket and higher cp pistons?

[gse_turbo]

hmm.....is there a way to calculate compression ratio with a thinner gasket? im thinking of getting the thinnest one you have which is the .030, also, is there any danger of the piston hitting the valves with the thinner head gasket and higher cp pistons?

yes, most piston manufacturers have a calculator on their site but you have to know ALL the specs. for the ones you don't know look HERE or HERE.

I would like to say no because they wouldn't have been made if they caused damage but I really don't know. I'll be getting my first 1.6 in the next couple days/weeks and i'll know 100% then.

[xstevex]

I'll get you the money by the deadline.

[mikedudley17]

i as well, just waitin on school still...

[AveoSSSupercharged]

you have me on the list right gse?

[gse_turbo]

g0ast, 8.5:1, 79.0mm ?
xstevex, 10.5:1, 79.0mm
khan4rtist, 10.5:1, 79.0mm
mikedudley, 8.5:1, 79.0mm ?
aveosssupercharged, 8.5:1 79mm

AS AN ADDED INSENTIVE... I'll give the Cometic MLS head gaskets at a better than ever price!
.030, .036, .040, .045, .051 and .051 thick...retail price $95.00, DAE price $87.00, WITH PISTONS $75.00
.065 thick...retail price $110.00, DAE price $95.00, WITH PISTONS $85.00

[g0ast]

Noob question again, what do head gaskets do again?
And what is the importance of the thickness?

[gse_turbo]

Well as you know it's the gasket between the head and block.

An MLS head gasket is stronger than the OE type and will resist blow out from high compression and turbo applications

The true pupose of the different thicknesses is so that you can have the head or block shaved and maintain the original specs.
Some people use the different thicknesses to dial in the comression ratio to sizes that aren't typically available with the pistons (ie: 10.75:1 instead of 10.5 or 11.0). That takes a tone of math and unless you are strictly racing it's more work than needed.

Some people try to drop or raise their compression with just the gasket (thicker gasket=lower compression, thinner gasket=higher compression).
The only thing about this is it does change the CR but not as much or as correctly as pistons.
By using a gasket alone to change compression ratio you affect the "Squish Band" where pistons do not.
here is a link to explain the "Squish Band"

[mikedudley17]

still waitin on school...