Should I switch to S3's?
 

This isnt so much a "help convince me" thread moreso than it is, technically, is it doable type question? I have S2's right now, its a BR long rod 2.4 (10:1 cr) with an FP Black and a BR stage 3 head. I want to do the S3's because theyll help the motor breathe a little better especially up top.4 and I feel like theyll push me an additional 25-40whp past where I am now. My biggest concern is piston to valve clearance.

Anyone have any input?

i belive youll be fine.. have them in my 2.1 br motor ill let you know how they are in like two weeks...

Are you a 9? I would run the custom Cams John Bradly had gsc make.

I would not throw any big cam in without checking ptv clearance though.

Fathouse

Call greg@gsc. Something custom may be best.

Fathouse what do you mean?

why didnt you go with the BR cams?

Its an Evo IX, there is no option from BR for those currently.

The custom cams we have done are hard to get billets for. Greg and I have talked about running S3s in my car to see what the difference is. However we just havent had a chance to get that testing done yet. The lift on the S3 is 11.7 both sides so its a little less than the crazy ones I am running. I think this would be a more accessible easier to obtain route.

It would require going to a specific valvespring for the combination though. Either the GSC spring with Ti retainer or a set of Kiggly Valvesprings.

Aaron

so the gsc s3 for the evo9 from gsc are what specs... and what are the specs for your and the price?

thanks rogerio

My specs are not being disclosed publicly other than they are bigger than an S2 and have 12mm of lift. As we can get them they are 685 a set. The GSC S3 cams are these specs-

S3 Specs .

6009S3 ADV Duration Duration @ 1mm Peak Lift CenterLine
Intake 280.........................................238 11.70mm 130
Exhaust 280......................................238 11.70mm 115

Ya I did think about the custom cams and spoke with Greg and Aaron at one point on them, and I then kind of swayed over to the S3's due to the fact that theyre a little more user friendly than the custom grind ones and the S3's are a bit more readily available than the custom grinds.

yea i would just go with the s3s or fp5rs ...

FP5rs are bigger than the s3 cams I belive. I run those in my setup now, nasty they are!

Fathouse

i know i would run those if i could sell mine...

5R's would be interesting, I think theyd do well for the 2.4, the extra breathability would be good.

Actually to say the truth i'm not impressed with my s2 cams that much if I had my choice I would have gotten the kelfords are even wait for the juns..If I was you get the fp5 cams.