What valve springs can I use on my sb chevy? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-02-2008, 12:12 PM
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What valve springs can I use on my sb chevy?

Lets say the aftermarket cylinder heads you are looking at have 1.430 diameter valve springs and are good for 600 lift. You can also buy these heads bare and assemble them yourself. I already have a set of new springs that are good for 510 lift and they have the stock diameter of 1.240. I don't plan on exceeding 510 lift so can I use the smaller springs on these heads? There are so many size diameter springs, I don't want to use a set that is rated for more than what I need. Obviously I would need the retainers to match the size of the springs. Are the 10 degree valve locks better than the 7 degree?
Thanks for your time

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Old 06-02-2008, 04:00 PM
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Quote:
Originally Posted by 4speed57
Lets say the aftermarket cylinder heads you are looking at have 1.430 diameter valve springs and are good for 600 lift. You can also buy these heads bare and assemble them yourself. I already have a set of new springs that are good for 510 lift and they have the stock diameter of 1.240. I don't plan on exceeding 510 lift so can I use the smaller springs on these heads? There are so many size diameter springs, I don't want to use a set that is rated for more than what I need. Obviously I would need the retainers to match the size of the springs. Are the 10 degree valve locks better than the 7 degree?
Thanks for your time
you can use the 1.240 springs, but you will have to get some spring seats for the 1.240 springs, to hold the bottom of the spring in place. make sure your heights are set with the proper seat and open pressures. you may or may not have to machine the guide post dia. for seals with 1.240 springs.

sam-missle
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Old 06-02-2008, 11:24 PM
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I guess the smaller spring can move around since the area its in is machined out. I would be better off just getting the large diameter psrings and be done with it.
Thanks,
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Old 06-03-2008, 12:27 PM
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You can do it any number of ways. If you need a stock dia spring use one, with the appropriate spring locator/cup/retainers etc. Everything is available for this use from various vendors suppliers. Even springs of the same diameter are available in different rates etc. Whatever is easiest and suits your needs would be the way to go, IMHO. Just what heads are you referring to???
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Old 06-06-2008, 12:02 AM
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Sorry for the delay in answering. The heads I'm talking about are the Pro Topline's. However I've heard alot of bad stuff about them and I may end up going with Vortecs.
Thanks again.
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Old 06-06-2008, 01:40 AM
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Quote:
Originally Posted by 4speed57
Sorry for the delay in answering. The heads I'm talking about are the Pro Topline's. However I've heard alot of bad stuff about them and I may end up going with Vortecs.
Thanks again.
Nothing wrong with the Pro Toplines. You must be thinking of ProComp JUNK.
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