[rodneybutler]

Tom. I have lifted the heads on the dyno with a pump gas, 8-71 roots deal when I surpassed the timing threshold trying to make power. I actually saw the compression blow out. It had Cometic head gaskets on it and I figured they were done after that. Did leak down, all good. Backed two degrees out of it and finished the dyno tuning with no problems. No water leaking, no compression loss. I was pretty impressed that they stayed sealed up after I abused them so much! Was running 14 psi with BDS trying to make 900hp. Needless to say, I'm not impressed with that blower. That engine would make 750 NA pump gas.

[beastmaster]

" Travis Q " Another method is the one Marty used and he touched on it in the other thread, and that's the gas filled oring/sealing ring. The ring is compressed slightly in its groove as the head is torqued, and if the head lifts the ring expands to take up the gap. Also, as the hot combusion gases come into contact with the ring, the pressure in the ring increases, which tightens the seal further. This is a great method to use if you have room between the cylinders for the rings, which most engnes do, but some don't.

That method is the commonly used in the building of the hot section in a turbine engine . We call them the e-ring . Good ideal!

[Marty Palbykin]

Originally Posted by beastmaster

" Travis Q " Another method is the one Marty used and he touched on it in the other thread, and that's the gas filled oring/sealing ring. The ring is compressed slightly in its groove as the head is torqued, and if the head lifts the ring expands to take up the gap. Also, as the hot combusion gases come into contact with the ring, the pressure in the ring increases, which tightens the seal further. This is a great method to use if you have room between the cylinders for the rings, which most engnes do, but some don't.

That method is the commonly used in the building of the hot section in a turbine engine . We call them the e-ring . Good ideal!

It definatly is not a gas filled ring.
As soon a we got the tuneup right the gas filled ring failed.
But the solid ring did not.
Machining is also very simple.

[Travis Q]

Pretty trick, Marty.

[65nss4spdGTO]

Originally Posted by Travis Q

Pretty trick, Marty.

X2

Calvin Hill
Hill Performance
708-250-7420