Quote:
Originally Posted by Dream20b
So, I'm looking to do some custom cams for my '13 FRS-
Stage 1 Sprintex 210 Kit (non IC)
Tomei EL Header
Perring 2.5" Resonated Exhaust
On E85
12.898@110mph
I'm shooting for 11s, trying to squeeze every bit of power out of it. Has anyone figured out what the optimal lift and duration etc is for a mild S/C camshaft set?
I would also be interested in seeing if there is any merit to the HKS claim that you have to use HKS/Custom pistons with their cams, or why that is if it is indeed true.
I'm also curious if i'd need more fueling for this setup. Obviously would require a retune. not going to buy $1400 cams for this car either.
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FIFY
"Optimum" turbo cams would be significantly different than "optimum" s/c cams for any car. The biggest differences would be duration, overlap, and timing.
Since there's no concern on the exhaust side of a s/c'd engine (besides evacuating it quick enough), you can cam it like an aggressive N/A engine and it will respond/perform accordingly. The HKS cams are designed that way; ideal for N/A & S/C. A little more lift, a little more duration, (tune controls overlap), and the geometry doesn't allow anyone to go much bigger without changing the heads.
The valve pockets in the HKS pistons are deeper to maintain the same p-to-v clearance as stock when using HKS cams.