Looking to upgrade my cams. Im looking at the fp4r's but i havent been able to find any dyno charts for setups similar to mine. Anyone know how they will perform with a 35r, like how it will affect my powerband? I also see a lot of people like the gsc s2 cams but i hear the 4r's are more aggressive. Just looking for some input from the gurus here.

The car is stock block and head. I am upgrading the valve springs and retainers though when im in there.

 

Check out GSC's new line of R2 cams a little more aggressive than the S2's might be exactly what your looking for I bwlieve English Racing has them in stock.

 

The GSC R2 cams are for stroker motors, so I would suggest an S2 or similar on your set up. You can get with English racing, they have a lot of dyno graphs and real world info on all types of cams and set ups.

 

Couldn't have said it better myself.

 

Thanks for the input. S2's have caught my eye, but so have the S3's. its just hard to see how all these cams stack up against eachother. It would suck to spend $600+ on cams just to be disappointed

Can i ask a dumb question, but what makes those cams for a stroker motor? I can understand the rpm range, but besides that why couldnt you run them in a 2.0 withing that same rpm range? Can you even run them on a stock head/block combo considering how high the lift is?

 

I love my GSC S3's on my 2.0 FP Black setup.

If I were to choose again, I would still stick with the S3's


-Bink

 

I would suggest Kelford 272, FP4R or FP5R, GSC S2s/S3s/ BF 272s. I would go big with cams just in case you upgrade your turbo setup then you wont have to change down the road

 

i have the gsc s2 cams on my stock motor with the HTA gt3582r turbo and i love the cams. I gained 15whp over my old hks 272cams.
Heres my dyno on straight 91octane at 22psi of boost.

 

It isn't a dumb question at all, simply because not many truly understand the answer.

A stroker in 4G63 terms typically combines two significant differences - 20% more displacement and a shorter rod/stroke ratio. The greater displacement compensates somewhat for the reduced low speed torque as a result of longer effective duration. The shorter rod/stroke ratio causes the piston to move more slowly around BDC. This means an equivalent cam in a stroker motor requires longer effective duration to close the intake valve with the piston in the same position as it was in the 2.0.

In your case, the main limitations are the stock block and stock head ports. More power has been generated with something along the lines of a GSC S2 than you will ever achieve with this turbo setup, and especially with a stock block. What the S2 will do however is give it to you with minimal losses in the rpm ranges where the engine will spend most of its time.