On the flip side, a properly sized turbo will exhibit most of the same characteristics, which is why there are turbocharged F1 engines. I mean, how often are you going to be below 3000rpm while racing?
Rarely. Unless it's diesel. And if you drive the track properly, you shouldn't be at partial throttle all that much either. In any case, I still like my all motor engines!
Why wouldn't people use forged pistons? It makes sense. Then again, there's that word that most people at my job don't know the meaning to...sense.
Cost.
Vitara pistons are from the Suzuki Vitara, which uses cast pistons like pretty much everyone else. The juxtaposed advantage and disadvantage is that they provide ~8.5:1 compression in a D16. Good if you're a cheap-ass and want 400whp, but that compression makes the engine have a lot less off-boost power. Where, with forged internals, you can run a little bit higher static compression and back the amount of boost off a tad so you get more off-boost power and similar peak power with less boost.
I thought they were stronger than the d-series pistons due to some sort of coating they have. And I priced out the parts for my head and I plan on going with skunk2 parts.
I'm pretty sure that it's the low compression that keeps them from blowing up.
The Vitara pistons that FJT sells on Honda-Tech are NOT OEM Vitara pistons. They're aftermarket replacements for OEM applications, and they are cast from a different aluminum alloy (T-6 I think) and also have a heat resistant coating on top. That plus the compression ratio in the D engines are what make them so desirable, along with the price!