Has anyone ran a thinner copper head gasket on a P650 to raise the compression with a stock piston to 11:1?

Yes or no. If yes please give the website or email where the gasket came from.

Thanks
Tim

 

Head gasket post
I think they are about $70 from comet, wiseco 11:1 i think are only $120.

 

Just a word of caution, incase you didn't already know. You run a higher risk of blowing the head gasket when using a thinner one. Just to let you know! [img]i/expressions/face-icon-small-happy.gif[/img]

 

Thanks cueball, Im getting ready to port and polish the intake and heads on my P650. Also going to go with a new 11:1 stock size piston or hopefully just change the head gasket to get the 11:1 out of my stock one. Im also going to go with Mickey D cams but havent talked with him about those yet.

Im wanting to make my P650 run with the new BF750 for as little money as possible.

 

Even if its copper?

 

I'm not sure. All I know is that the thinner the gasket, the higher the risk of blowing it. Rasing your compression ratio one full point sounds like a big jump in gasket sizes. I really can't say too much, I'm not that educated on a Prairie. lol

 

KOD;

I think the Cometic gaskets are made to go with the high comp pistons. If your getting new pistons, just buy the 11:1 ones, the price will be the same, they'll have the valve pockets made in them.

be careful of how much squish you have with thinner gaskets,

 

I agree with the "squish" thing, there is very little ( in reality ), difference in compression ratio, between a good quality ( thicker ) head gasket, when properly torqued, & a thinner, harder head gasket, when properly torqued...

 

Thanks guys, I seen the comet gasket last night on their site for $70. I havent called or emailed them but I wonder if that is for 1 or 2 gaskets. Thats a high price it should be for two. The reason for trying to find thinner head gaskets is to save money over buying new pistons. I will be doing this work myself with the help of my brother in law and I want as little money invested in this job as possible.

However I will do what it takes to run with a stock BF750.

 

I would think with your modds, just a degree key and cam timeing advance would put the BF in your rear view mirror.