.21 head gaskets

[Jack]

I used to have an XTM 24.7, now I'm running a Mach .26. Both motors had two headgaskets, has anyone tried running just the thinner gasket with 20%? That should bring up compression a bit, maybe run a cooler plug so it don't detonate?

[Tex]

why would it detonate?

[Mr. Tune]

I haven't, but if it works out for you, I definetaley try it out. How much more compression is there? I remember you telling me something about the pullstart being alot harder to pull at this past sunday.

[Tex]

I've never met or talked to you before bub.... hope to see you soon though

[Mr. Tune]

I've never met or talked to you before bub.... hope to see you soon though

Sorry, I should have used the quote button. I was replying to jack's post.

[Jack]

why would it detonate?

I don't know, I figured higher compression=more prone to detonation. I ran the motor last sat. and it seemed to run fine on the thinner gasket. It was a lot harder to pull the pullstart, though- it felt like I was about to rip the pullstart off the backplate. Don't know if it actually increased power, the mill is in a different car.