apex head gasket

[Apex06]

hey guys
have a questions about head gaskets... boondocker kit says to put a head gasket on the top and bottom of the head shim.... alpine uses 1 head gasket and splits it.... i already bot 2 head gaskets, what do you guys think of both?

thanks mike

 

[TApeX_07]

I believe I used one and split it. Just save the other one as a "just in case".

 

[yammi4ever]

I would say you better check with them, they may be counting on the extra thickness of the extra gasket for their compression ratio they desire. I split mine also, but this was on a powderlites kit. not sure how much one gasket would change the ratio, but still better ask.

 

[julio]

shim

probably depends on what you want to run. if you want to run pump and be really safe put both in. I know mcx splits one and runs a smaller head shim than boondocker. mcx is 59thow. plus one gasket boondocker is 63thow and they recomend two gaskets. each gasket is about 20 thow. I have been wondering if there is anyone who knows what that gives you for compresion. julio

 

[Polarisrocks]

That octain fuel chart can show you your compression on ttl yamaha. You have enter your head shim thickness to get your dynamic comp ratio. I have a powderlites and have a .040 thou shim with 2 full gaskets. If you have a .060 and split a gasket, it ends up the same thickness. Yammy gaskets are like 18-19 thou. And of course subtract or any head decking. hope that helps