thicker head gaskets for making 18:1

[HANK1948]

Has any one tried installing thicker head gaskets to achive 18:1? why wouldnt this work , get some copper gaskets made to the right thickness and wouldnt be any different than making the pistons shorter. I believe you remove .060 off the pistons to achive 18:1 why not make gaskets .060 thicker?

[Dvldog 8793]

Sounds like a good idea but would it create a problem with the intake manifold?
Something to think about!
L8r
conley

[HANK1948]

.060 is not much but if it posed a problem with the intake you could always double the intake gaskets.

[whatnot]

They heads angle away from each other. By moving them up you are moving them farther apart. It probably wouldn't be enough to cause a problem but if it did then the bolt holes not line up.

[Dvldog 8793]

Whatnot got it! I used thicker gaskets on my GTO to lower the compression so I could run pump gas.
I don't remember what thicknes they were, but it did not work because all my intake holes were off. I could have rebored the holes and then rematched my intake :D :mad: Not really worth it! I just buy gas at the Airport :D !!!
L8r
Conley

[eracers999]

Just for curiosity sake what is the compressed gasket thickness of a stock 6.5 head gasket.
Is the aftermarket fel pro thicker than a stock GM?
On the gassers it was common to loose compression when replacing the steel shim GM gasket with a fel pro.
Kent

[diesel65]

A another problem with thicker head gaskets is the pushrods for the valves will be shorter.
There is no provision to adjust the rocker arms.

[Kennedy]

"Squashed" thickness as .039" Later gaskets (GM are FelPro) are .049"

Sinking a piston below deck is NOT a practice that is widely accepted in gasoline engines, and IMHO, not the best plan for diesel either...

[AndyL]

Don't forget that a thicker gasket will also increase the surface area pushing outward. Could increase the chance of head gasket failure.

[C.K. Piquup]

No cheap way out when it comes to changing major characteristic of engine`s dynamic.Sorry.The thicker Fel-Pro gaskets are meant to compensate for material lost from resurfacing.Dished-top pistons is the way to go.