head gasket

[EGB16A]

I searched stopper head gaskets to find out the difference between that and a normal gasket but with not much luck. Can someone explain the differnce? And in the high budget area of that turbo bang for your buck thread it recomends the use of a stopper style gasket, and i've searched to see what is available but there is afew thicknesses. Which is better, thicker or thinner?

[BLKCRX]

I use a custom Cometic gaskets if that helps ;-)

Regards James

[tinkerbell]

With ever improving tuning technology, the pressure increases found in the combustion chamber can become a problem. Improved gas sealing is a high priority when increasing the power output of any engine.
Pressed steel type. The sealing system is made of two sections, a ring and bead, forming a strong seal.

http://www.todaracing.com.au/html/bo...nda_civic.html

[tinkerbell]

I use a custom cosmetic gaskets if that helps ;-)

Regards James

and i hope you mean Cometic, lol!!!

http://www.cometic.com/

[BLKCRX]

yes ..

[EGB16A]

thanks guys, but would a thinner or thicker be more advisable?

[BLKCRX]

Very much depends on your setup / your aim / how much boost / what fuel / what compression ....

[EGB16A]

Very much depends on your setup / your aim / how much boost / what fuel / what compression ....

aim= 250+wkw
boost= about 15psi give or take (should be enough to achieve my aim)
fuel= pulp (optimax)
compression= fairly high

i hope i'm not asking to much!!

[tinkerbell]

high compression + boost is probably not an ideal area to be raising/lowering compression for the sake of it.

in such a situation, and BLKCRX will hoepfully agree, a better sealing HG would be what to look for over higher CR...

i know James was/is running much higher boost than you intend, but he might be able to indicate when a custom HG is required...

also IMO thicker headgaskets can cause more problems than they solve,

basically - your pistons will determine compression ratio, the HG is only there to keep it all sealed and tight

[TODA AU]

I use 0.6mm on most turbo applications & adjust compression in the chamber & with pistons.

[ProECU]

Head gasket thickness should be chosen according to optimise piston quench pad to cylinder quench pad distance.

Cometic gaskets are the best

[TODA AU]

Cometic gaskets are the best

LOL.... I call BULLSHIT!

They are cheap & nasty. Certainly not exellent.
The only place I would ever use a cometic head gasket is on a B20~B16 conversion.
Only because nothing else is available.
Not in a million years would I ever use one by choice.
They are over rated & certainly no better than stock.
Some are bordering on absolute crap (SR20) with an aluminium centre shim.