Stock piston Rev limit
Modest budget twin turbo ?? If your building a motor the foundation is important . What you're planning on building is not cheap , best do it right first time around . With turbos and superchargers I would not skimp on the pistons .
Good luck 550 hp and twin turbos is not modest budget territory , at least not for me . Hate to tell you what 412 hp out of a 340 cost me , but it's still running after 10,000 hard miles and many runs at the track
Well, yeah, the age old issue of cheap-fast-reliable pick two, but I've run into a connundrum. Quite simply there seems to be no consensus as to what the factory components are good for. on the one hand you have people who put thousands of dollars of forged lightweight components into a motor making only 30% more power than stock, but on the other you have people running nitrous on top of boost turning the motor 8000 rpm with factory parts.
There was a thread on here not too long ago asking about the power capacity of the stock block, and there were people recomending an aftermarket block at the 500hp level, and there were anecdotes of people making upwards of 700 horses trouble free on the original block.
And between these discussions here and talking with local racers, engine builders, and my machinist, it seems that stock components or aftermarket, an engine won't break just under it's own power. Engines break when the motor runs lean and detonates, or is starved of oil, or it's over revved, not from producing too much power. And the only thing that the expensive aftermarket components buy you is more tolerance of overrevving and detonation.
Admittedly this build isn't going to be bulletproof, but it's my understanding that boost (and turbochargers in particular) is easier, power for power, on bottom end components than high compression n/a builds and nitrous. (Imagine how much money I'd have tied up in the bottom end of this motor if I were trying to build a 550 hp 318 naturally aspirated.) And either way, if I break something in the bottom end of this motor I'll only be out a re-ring kit, and back to square one. (which will fasttrack me getting a 360 block, and a stroker kit)
It's a gamble, and it might be a timebomb, but if I can make my power goal with the parts I have, and have a little fun with it, it's mission accomplished. I don't need this to live for 200 passes, (hell, I'll get bored with it and build something else within two years I wager) But from the range of answers I've gotten, It's become clear that I won't know where I stand until I put it together and start running it.
