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Discussion Starter #1
I would appreciate any info on the legitimate cause(s) of "tuliping" intake valves??

Have a 900+ HP SBC (blown) with 3 tuliped intakes and a 3000HP BBC (twin-turbo) with the same scenario, 3 intakes tuliped!

Thanks, Gary in N.Y.

P.S. There is no damage to either unit on the exhaust valves, none burnt/none tuliped. Will keep valve "brands" under wraps temporarily, I don't believe the brand to be a factor?
 

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The valve brands, therefore materials and construction make a lot difference. Put a good flat faced titanium intake with some margin in it and it will be fixed, barring tuning errors.
 

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Do all of the intake valves have the same margin, or close to the same? As pointed out above, lack of margin and excessive heat ate typical causes of valve tuliping.
 

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If it is 'heat' seems odd that the exh valves were not showing signs of heat stress. Without seeing the valve, maybe a combination of seat bounce, large diameter & a thin head.
 

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Too much timing or too hot of a spark plug, are typically the causes of problems on the intake side. A rich mixture can aggravate the situation.
 
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