valve springs on 305 heads!!

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04-21-2006, 09:39 AM

buttermantoast

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valve springs on 305 heads!!

I am building a .40 over 350 with a pair of oem 305 heads on them and the guy wants to put a cam and i was wondering how much the factory valvesprings can handle?

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04-22-2006, 09:39 PM

WheelsUp84z

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depends on the year i would think, im pretty sure they arent built to handle much more than .525 at most i would think

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04-22-2006, 10:04 PM

1FSTZ71

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They can't handle that much I don't think. The factory 305 cam is like .395 lift if I recall correctly. I doubt the factory springs can handle it, LT1 springs won't even handle .525 good stock

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04-23-2006, 10:28 AM

WheelsUp84z

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well i know that the 305 tpi and the 350 tpi used the same cam and im pretty sure it was bigger than .395 lift.. but like i said it would probably depend on the year and what the car came with

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