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Old 09-06-2024, 08:48 AM
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slowbird slowbird is offline
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Am I missing something ?
Yes you are. Not everyone runs Butler pistons. Also did you check radial clearance on your pistons? .080 is a noticeable move.
Don did a good thing by moving the valves but he might have created other issues by doing so.

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Old 09-06-2024, 05:10 PM
Dragncar Dragncar is offline
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Yes you are. Not everyone runs Butler pistons. Also did you check radial clearance on your pistons? .080 is a noticeable move.
Don did a good thing by moving the valves but he might have created other issues by doing so.
I ran it all by Jeff at KRE so he knew exactly what pistons I was using. I did check piston to valve with a soft spring with the cam when it was a .447 lobe and it was fine. Then I had it re ground to a .431 lobe so the clearance got even larger.

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