NHRA Pro Stock 500ci Engine on the Dyno (10,500 rpm)

Snowmobile, 1000cc yamaha making 400+hp. Ive ridden. My buddy owns it.
Others that are drag racing them are over 600hp, same engine. Have to use a billet block over 450hp. They egg out.

6.5hp/ci
9.8hp/ci
Sure. But they aren't Naturally Aspirated, either.
 
Snowmobile, 1000cc yamaha making 400+hp. Ive ridden. My buddy owns it.
Others that are drag racing them are over 600hp, same engine. Have to use a billet block over 450hp. They egg out.

6.5hp/ci
9.8hp/ci
very nice
but clearly not bone stock ... like what i was talking about...that anyone with the cash can walk into a dealership and walk out with
a 3hp/ci vehicle. and with some $5 fuel (say ms103) and efi tuner make 3.2ish. bone stock. of course this is easy to do with small motors.
ie ktm 85sx is 5.1ci .. makes about 27hp. thats way over 5hp/ci puts a PS motor to shame on ratio. there are kids that are not teens that
rip on these that make over 30hp and 6hp/ci!!!

the impressive part of a PS motor is the 3hp/ci for the size at 500ci. not the ratio
 
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