atb

I know this has been kicked around some in the past, but I wanted to see if we could get all the info in one place.

The question:

What options are there for high performance cams and valve springs in an S4?

Cams:
GT
Modified 32v S
DEVEK B1/B2
Threshie 928 Developments
??????

Springs:
968
951
Threshie 928 Developments
????

Thanks for any input. My heads for the stroker motor are almost done, (New 968 Intakes Valves, S4 Exhaust Valves, new seats, guides, and ported for the Ott Engineering ITB intake.) and its time for me start sourcing cams and valve springs.

I have a set of S4 cams and GTS cams that I could send in to be reground.

What are people using, and how much did you pay? (if you don't mind sharing).

BC

The heads that motorsport promptly and professionally rebuilt (but were lost by Fedex in the first part of this month) had S3 springs in them which you can get through Mark at 928intl. Very nice springs, good tension for higher rpm or maybe heavier valves. 12 bucks each. You will need either 85/8632V spring seats or some other derivation.

Modified 32V cams are running about 400 bucks for the cams and about 4-500 for the mods. 1000 dollar GT cams would be a good option.

John Veninger

I don't think you can source GT cams for $1000.00 unless you get real lucky
You'll need to source those springs before the head work is done. You want to make sure you have the spring set correctly so there is no coil bind when using a high lift cam.