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Author Topic: Listeroid intake porting  (Read 802 times)

38ac

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Re: Listeroid intake porting
« Reply #30 on: January 03, 2021, 01:48:42 AM »
Shrouding may not be the technically correct term but the 45 seat angle starts at the deck and continues down past the full face of the valve and below it. The head of the valve recessed at .100 below the deck. Certainly not conducive to good flow past the valve,, or great seating either.
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gadget

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Re: Listeroid intake porting
« Reply #31 on: January 03, 2021, 04:08:44 AM »
Shrouding may not be the technically correct term but the 45 seat angle starts at the deck and continues down past the full face of the valve and below it. The head of the valve recessed at .100 below the deck. Certainly not conducive to good flow past the valve,, or great seating either.

Ah yes, I see what you mean. Just curious, what kind of life are you seeing out of the factory seats? Are they prone to sinking?