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#1 | |
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Ed Wright 4156 SS/JA |
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#2 |
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A smart guy told me one time that the lighter you make it on the valve side and the stronger you make it on the push rod side the better off you are. That being said the lighter the valve the less pressure you need.
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Greg Hill 4171 STK |
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#3 |
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I was watching a video with Billy Godbold and Scooter Brothers and they said they built a system for a restrictor plate NASCAR engine that had 70 pound spring pressure on the seat and something like 140 pounds over the nose. I'd like to know the rest of the details on that build.
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Mopar 2 Ya! |
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#4 | |
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Join Date: Mar 2005
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Nevertheless, those low spring pressures and rocker ratios don't seem to work for drag racing. |
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#5 |
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Ed. that was my thinking originally throw the biggest valve springs but once again the spintron proved me wrong. Went from 850# to 700# ...Luke SS 311
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#6 |
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Ed
One thing everyone forgets is the results on exhaust side can be questionable because in the real world the exhaust valve is trying to open against cylinder pressure on the spintron there is no cylinder pressure! |
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#7 |
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Correct. But that force goes away the moment you lift at the stripe and the engine is still at high rpm for a few seconds....
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#8 |
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My intake valves are the close ones. I run both as close as I have learned I can get away with. I run my intakes at .040". Have gotten by with .036". Lose 100 on the seat, they hit.
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Ed Wright 4156 SS/JA |
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