Thread: Stock cam VS S4 dyno results

Made 30whp gain, with 22whp peak gain with no loss to bottom end. This is a stock W10 @ 6 psi, JWT computer and t28, 2.5" exhaust, stock cat.

Car runs consistently within 2whp between runs.

I know somebody is going to chime in and be like how is he running on 6psi. WHO CARES lol. Regardless of the boost level THAT is impressive! It would make more with a 3". But I think it would start losing bottom end then. The only problem I have with these cams is they cost 600

this is great... i have been hoping for someone to throw up a dyno comparison. I have my s4's in the mail and waiting for them. I will be installing soon also. Thanks

All you had to do was ask and everybody wouldve told you the S4's add about 25-30whp on turbo setups This is old news.

nice numbers. Thanks for sharing

I was running 4psi with a t28 for awhile but that was because I didn't have any kind of Boost controller at that time. I dynoed a whooping 191whp @ 4 psi with S3', 9.5:1 comp., 2.25 exhaust.

Pretty good gains, but the price and loopey idle is not worth it imo

What makes you think it might lose power at low revs with a larger exhaust?

S4 cams at 15 PSI will make about 35-45 WHP more with a larger GT28RS-GT35R turbo

Johnny Wangwang when you go 3 inch on a turbo car you will not lose low RPM power, you will actually gain more low end power as the larger exhaust will cause the turbo to sppol quicker.

S4 cams in my opinion is the best turbo cam out there.

There's a cam program to get rid of the lopey idle. But the 30hp gain is well worth it. You'd have to be crazy to say its not worth it.