I'm interested in peoples' thoughts on HP reliability. Example, what should the daily and lifetime reliability on an unabused car with 475hp (assuming using a well-engineered system as Buschur's)? That is getting roughly 75% more HP/liter than the stock car.

 

If you mean 475hp at the wheels then I'd build up the bottom end a little, for 475 at the crank which would equate to approximately 400 at the wheels I'd trust it with the proper tune.

 

I think if you run anything over 350 whp as a daily driver, you're asking for trouble... Of course, money solves everything, so if you've got enough to build up the motor, it should last. On stock internals and bottom end, 350 sounds reasonable.