Dynoed 1170hp/1180ft/lbs today.
05-05-2010, 01:13 AM
#202
Interested in a set of these as well. I'm running a stock bore 6.0 iron block/crank with forged rods/pistons. Plan so far is TFS 220cc as cast heads with a little clean up and Inconnel exhaust valves. Shooting for 1000rwhp+ reliably. In another 2800lb RX-7 I have collecting dust.
06-01-2010, 07:02 AM
#206
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Wait a couple of days. They are sent from the factory to us. I will post pics,price and all info when i have them here. And it would be much better if a US company bought a couple of sets. It´s the same price for shipping on 1-10 gaskets from sweden to US.
06-26-2010, 12:33 AM
#208
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The process he does is what is called a stepped deck, but he does it differently. It is something done on lots of open deck honda engines. How its done is they mill the outside edge of the hondas open deck down .002 - .006 thousands of an inch. The cylinder sleeve is left untouched and higher then the rest of the deck surface. For a LS based engine you'll need a cnc milling machine to remove material around the cylinder sleeves and leaving a step of similar size as stated above. Hope this help clarify some of the confusion.
Last edited by 3rdGenLS; 06-26-2010 at 09:02 AM.
06-26-2010, 04:28 AM
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03-17-2016, 06:53 PM
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this is really cool. the only thing I saw similar to this was running a "stretched liner" the block had new ductile iron sleeves installed, that stick up above the block deck by just a smidge. Then the head is very precisely measured and for this build a very precise "receiver groove" was cut into the head. same type of concept but the pyramid rings and even better the pyramid gasket sounds interesting.
the old buick turbo guys might remember the "lock wire" felpro gaskets, similar to the pyramid concept but designed for iron buick heads a receiver groove is machined into the head and the thick "fire ring" of the HG mates into the receive groove.
very expensive and tough to do! My only concern is the ring "cutting" into the head by just torquing it down, seems like it would stress the head and make the head distort, but I guess the alum is pretty soft and the ring cuts into it easy. very innovative!
thanks for bringing this old thread back from the dead. interesting stuff!
the old buick turbo guys might remember the "lock wire" felpro gaskets, similar to the pyramid concept but designed for iron buick heads a receiver groove is machined into the head and the thick "fire ring" of the HG mates into the receive groove.
very expensive and tough to do! My only concern is the ring "cutting" into the head by just torquing it down, seems like it would stress the head and make the head distort, but I guess the alum is pretty soft and the ring cuts into it easy. very innovative!
thanks for bringing this old thread back from the dead. interesting stuff!