BIGGER valve for SCJ Heads?

Im using a set of SCJ Kaase heads on a 572, what size valves should I squeeze into these, im gunna have these ported also.Thanks

thats good advice, was just on here and was thinking out loud for a moment and my fingers hit the key board.

probly hit up Randy, he is only a couple hours away from me I think.

stanggt wrote:Im using a set of SCJ Kaase heads on a 572, what size valves should I squeeze into these, im gunna have these ported also.Thanks

The intake seats in an SCJ head are just under 2.300" in diameter, (58mm plus the press), so, a cut down 2.300" valve to 2.280" with a thick margin works OK if the engine is not overheated and kept out of detonation. Otherwise a 2.250" is the largest if those things might happen.

thanks Randy, we'll talk soon. I know I need abigger better set of heads for this big cubes but thats what I have for now so I will have to do what I can to these unless I can move them to someone. I just remember seeing someone getting some good flow from these heads just dont remember where i read about it.

stanggt wrote:thanks Randy, we'll talk soon. I know I need abigger better set of heads for this big cubes but thats what I have for now so I will have to do what I can to these unless I can move them to someone. I just remember seeing someone getting some good flow from these heads just dont remember where i read about it.

Air flow wise - a well ported aluminum SCJ head is about like an "out of the box" P-51 would flow.

rmcomprandy wrote:

stanggt wrote:thanks Randy, we'll talk soon. I know I need abigger better set of heads for this big cubes but thats what I have for now so I will have to do what I can to these unless I can move them to someone. I just remember seeing someone getting some good flow from these heads just dont remember where i read about it.

Air flow wise - a well ported aluminum SCJ head is about like an "out of the box" P-51 would flow.

that would be great get with ya soon,thanks Randy

chris