BIGGER valve for SCJ Heads?

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BIGGER valve for SCJ Heads?

Post  stanggt on January 21st 2012, 10:56 am

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
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Re: BIGGER valve for SCJ Heads?

Post  c.evans on January 21st 2012, 11:18 am

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

Simple enough question,,,, but imo the proper procedure would be to find a good head porter who is familiar with porting and flow testing the SCJ heads and then ask him that question and follow his advice.

Hope this helps,

Charlie

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Re: BIGGER valve for SCJ Heads?

Post  stanggt on January 21st 2012, 12:40 pm

thats good advice, was just on here and was thinking out loud for a moment and my fingers hit the key board. Laughing
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Re: BIGGER valve for SCJ Heads?

Post  stanggt on January 21st 2012, 12:42 pm

probly hit up Randy, he is only a couple hours away from me I think.
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Re: BIGGER valve for SCJ Heads?

Post  rmcomprandy on January 21st 2012, 12:48 pm

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.

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Re: BIGGER valve for SCJ Heads?

Post  stanggt on January 21st 2012, 3:34 pm

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.
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Re: BIGGER valve for SCJ Heads?

Post  rmcomprandy on January 21st 2012, 7:16 pm

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.

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Re: BIGGER valve for SCJ Heads?

Post  stanggt on January 21st 2012, 9:59 pm

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 Very Happy get with ya soon,thanks Randy

chris
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