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Do I have to flycut??

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Old 10-03-2006, 09:58 PM
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Default Do I have to flycut??

do you have to flycut the pistons if you are using stock 241 heads with the TREX or TRAK cam. I am trying to decide which cam to go with and I am trying to make a shopping list of things I need. Which springs are optimal for a cam this big? Will my stock lifters and rockers be ok?

Thanks!
Old 10-03-2006, 10:03 PM
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No flycutting required it was a design requirement by Thunder Racing that they fit in a stock motor. Your lifters and rockers will be fine. The PRC dual springs or even better the Comp 921s would work.

Ben T.
Old 10-03-2006, 10:09 PM
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Thanks Ben!!
Old 10-03-2006, 10:12 PM
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Originally Posted by Studytime
No flycutting required it was a design requirement by Thunder Racing that they fit in a stock motor. Your lifters and rockers will be fine. The PRC dual springs or even better the Comp 921s would work.

Ben T.
He's right, it will fit. But that's not with the textbook .080 intake/ .100 exhaust clearance. But people do it all the time.....
Old 10-03-2006, 10:15 PM
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Do you know where the clearance ends up or if anyone has had piston to valve clearance issues without flycutting?
Old 10-03-2006, 10:25 PM
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I doubt there are any common problems. This camshaft was designed for cam-only setups and to work with a stock motor. The fit is close, but it clears.

Perhaps give Thunder a call?

Ben T.
Old 10-03-2006, 10:28 PM
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Thanks guys. I will give them a call tomorrow.




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