Would sure like to hear as many details on the engine as you want to share.
All I know is that it is a "ZR1" supercharged 427 LS.
Heads ? Cam ? Idle vacuum ? Compression ?
Mods ?
I usually assume that even the modern compression style blowers are still only about 5% efficient (including drive losses), which means at 882 whp the base engine is making 550 to the wheels ?
Would sure like to hear as many details on the engine as you want to share.
All I know is that it is a "ZR1" supercharged 427 LS.
Heads ? Cam ? Idle vacuum ? Compression ?
Mods ?
I usually assume that even the modern compression style blowers are still only about 5% efficient (including drive losses), which means at 882 whp the base engine is making 550 to the wheels ?
Huh???!!!!!! I will guarantee it makes way more than 550 rwhp. 5% efficiency seems just a bit low................ I remember when they were first starting the dynoing of the ZR1's their first dyno pulls were making close to 700 rwhp. They definitely backed it down for the production cars.
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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This thing is sick, liking the colors and no bling approach, very impressive,
Just kidding Mark. 
I remember when they were first starting the dynoing of the ZR1's their first dyno pulls were making close to 700 rwhp. They definitely backed it down for the production cars.
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