Quote:
Originally Posted by preston
Well if it is more efficient than 5% than the base engine power number is lower than 550. I know you understand that - IF the blower is 6% efficient than the base motor would make 512 whp. This assumes 12 psi of boost.
550whp is about the max I've seen for the 427Ls motors that are in what I would call the "streetable envelope", and Mark has always setup his cars to have reasonably tractable drivetrains. So I don't think it is "under rating" it to arrive at 550, that is a huge number, somewhere north of 650 on the motor dyno. That's why I'm always very curious about idle speed and vacuum, its the only way I know of to get some idea of how aggressive the engine is.
Not trying to be "one of those guys", I'm just genuinely curious about what went into such an amazing engine.
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I think you and I have a different definition of efficiency. If I say a blower is 5% efficient then that means it's 95% inefficient, it costs nearly as much HP to run as it makes.
Since the stock ZR1's dyno in the 540-550 rwhp range (Dynojet) and make 638 flywheel HP, I'm not sure how you'd add 240+ flywheel HP and still dyno at 550 rwhp.
Yes, the blower costs HP to run. If he's making 880 HP he's probably using fuel for 1000 HP+ to cover running the blower.