Valve spring life
I hear talk of superstock racers that have to change valve springs after 10 runs, is this for real? I know they run nearly an inch of lift, and almost 9000 rpms, but nascar runs 9000 for 500 miles. THOUGHTS.
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Re: Valve spring life
NASCAR Cams are smooth cams and no where the jerk a good Drag Race cam has.
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Re: Valve spring life
It depend on what class you're running. Since I use the "441" casting SBC head i'm limited on how big my valve spring pocket can be cut for the 1.64 spring without hitting a water jacket, so I use the 1.55 spring and yes you get only 10-15 runs out of a set, and it could go either way depend on how high you rev your motor. Luke
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Re: Valve spring life
I was told the hot set-up in valve springs for Super Stock are PAC . Used on a lot of Pro Stockers and Comp engines. Suppose to have long life. Check them out at racingsprings.com.
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Re: Valve spring life
I really like the 1.5" dia PACs. Got mine from Patterson Racing Engines.
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Re: Valve spring life
It's like anything "You get what you pay for" Comp #26082 should last over a season
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Re: Valve spring life
I use 947 comp springs 1.85 installed ht 400 lbs on the seat will set in about 380 to 360 will last me 2 years or about 300 plus runs on my 283 520 head. I shift at 9000 same in the lights. Camshaft and rockers ratio have a lot to do with it along with harmonics. Tom
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Re: Valve spring life
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