Thread: Affordable Piston Good For Atleast 500hp and 6500 rpm...Any Ideas??

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ohhh ya eric you said my carb is goona be too big? but you needed better cam specs... here they are
adv. duration 284in 296ex
@.050" Lift 240in 246ex
@valve .507in .510ex
what you think would be my best choice?????

170cc is going to starve your engine over about 4000 RPM or something without a blower, without porting you will stay under 400 hp, that's my guess. Together with that big carb you won't get good enough vacuum and port velocity to promote the mixing of fuel and air. Exhaust port size isn't that much of an issue I would say. I guess you will be running racing fuel if your shooting at the 500hp mark. I would change the following:

700cfm carb
AFR 195 heads (or comparable, i.e. bigger Edelbrock or Brodix)
forged pistons are OK (+.100 dome if you use the 70cc heads, TRW are prob the cheapest good ones)
Might try some block rock to tighten up the bottom end even further
Get rid of hp-killers: use a small oilpump (not high volume, so get your clearances right, at high engine speeds most of the oil goes through the bypass valve anyway, even with the small pump), use an electric waterpump, solid dampener (not fluidamper)
Use a big oil pan with scrapers

What it costs most is time. In the region of 500hp I guess there's a 50hp gain to be made in accuracy of the work you put into it, i.e. portmatching, detailing and polishing of exhaust port and chamber, if not already done, detailing the oil passages. Even with the most expensive aftermarket parts you might need to match some things here and there.
Just my 2 cents worth.
Max