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Author Topic:   14-1 COMPRESSION .... O-RING BLOCK DECK OR NOT ?
155fan
Member
posted May 24, 2002 08:25 PM
I'm running a 14 to 1 steel motor. its not ringed but we do run the head gaskets with the steel ring in them. I'm not sure with the alum. heads how it will work out. The first motor we built was a 14 to 1 and we didn't use the good head gaskets. The motor made it 3 laps then started melting down. It pumped compression past the gaskets and pushed all the water out of the motor. This was not a good thing!! gl ltr.


155fan
Member
posted May 24, 2002 09:44 PM
I have run 13.25 to one without anything special, Felpro gasket. I do not run that high any more. Very high compressions make the top of the cylinder walls ware bad and quick and do not seem to give enough power to justify the short time between rebuilds. On any racing engine however I run it one night and then retorque the head bolts,intake bolts and reset the valves. I think that retorquing is very necessary, often the short bolts by the exhaust turn 60 degress, the others are less. Like most of the rest I also run a lube in the methanol to help reduce the wear.


sdhnc29
Member
posted May 26, 2002 09:53 PM
You will have no problem's at 14:1 . We build our gas and alky engines with a minimum of 15.5:1 compression , most of our alky engines are at 16:1 with no problems . Be sure to retorque your heads before you race !! You will want to run your engine up to operating temp , and then let it cool back down to room temp . Crack your head bolt's , or nut's , loose about a 1/2 flat , and then come back up on your torque . Most people who have head gasket problems with aluminum head engines neglect to retorque the heads . Even though the head gasket say's "Perma-Torque" , this does not mean that they do not need to be retorqued !

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


155fan
Member
posted May 28, 2002 06:02 AM
30 Degress is half flat.



sdhnc29
Member
posted May 29, 2002 11:50 AM
George is right , about 30 degree's . You should only need to re-torque your heads once . Good luck with your new engine !

Steve

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


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