im going to be installing cosworth cams in my 9 soon and was wondering what the advantages are of doing springs and retainers also. are there and other vavle train items that can go along w/ this. i saw the supertech spring and retainers for sale and was wondering what they offer power wise as opposed to using the stock ones. ill also be doing arp head studs w/ this
thanks in advance, cj

 

People who are going to be raising their rev limiter usually like to upgrade their springs/retainers

If you're staying stock rev limiter though, there's really not an urgent need to upgrade

 

is it safe to rev til 8500 w/ all those above parts?

 

I wouldn't do it personally. I like a little margin for error, and I don't think that revving it that high leaves much room for safety.

Remember, this isn't a Honda, especially if you're still on stock turbo.

 

very true, im just gonna keep the limiter im at now and maybe later do the springs and retainers

 

You'll never make power high enough in the RPM range to warrant new springs and retainers with the stock turbo.

 

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