Quote:
Originally Posted by preston
Yeah my mistake - I'm totally using the phrase "blower efficieny" incorrectly. By that I mean you gain 5% power per psi of boost. The max "efficiency" possible is 7% (100 % / 14.7) which is close to what turbos get. Blowers (especially PD style) usually dip down to 5% per psi of boost.
When I say the "base engine makes 550whp" I mean with (theoretically) no boost or blower restriction the base engine makes 550
I was under the impression those dyno results I saw were chassis numbers, but I went back and those are engine dyno numbers. So if I run my little rule of thumb -
5% * 12 psi = 60% more power
875/1.6=550 base engine power at the flywheel. That actually makes more sense to me as a 550 hp Ls 427 is well within a streetable, tractable envelope.
Either way a tour de force, especially as we know the work has been done so it can live under track abuse.
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Now I understand.
550 n/a FHP is probably close, knowing his conservative boost level. Hopefully Mark can share the engine specifics that aren't secret.
