What springs for 993SS cams in a boosted 3.2?

[Tippy]

As the title says, what should I use?

I'll probably stay at 6750 RPM due to heavy flat top pistons that are 3.4, 98mm's on stock rods with ARP's.

This is a boosted engine that may see 2 bar occasionally, mostly 1 to 1.4 bar on the street.

[cgarr]

sounds like the same motor I have except I am na with a 7K limit running stock springs and I hit the limit a lot:

But with that cam, which I am not running might require at least street springs? Check with John about that:

[Tippy]

Originally Posted by cgarr

sounds like the same motor I have except I am na with a 7K limit running stock springs and I hit the limit a lot:

But with that cam, which I am not running might require at least street springs? Check with John about that:

Craig, you got away with the stock springs?

You rebuilt my heads; will the retainers clear the seals with these cams?

[Black_Hat]

I work with some guys who have boosted Supra's
they went high lift aggressive cam and 2 bar without enough valve spring
they both blew the valves off the seat and had valve piston contact ....bent valves , keepers in oil ..ect
lots of fun before that happened ...

I would ask around ...at that boost level you are going where few have with some measure of reliability