Continuing our virtual checklist of things to do with the new 638-horsepower Corvette ZR1, a trip to dyno to see just how much power the new King of the Hill is sending to the rear wheels can now be checked off. Corvette Forum member “Alvin” had not one, but two Corvette ZR1′s to play with on a dynojet earlier this week. Word on the street and yet unconfirmed is that these two ZR1′s were part of the group purchase of 5 made by Hendricks Motorsports team.
The first Corvette ZR1 to hit the dyno was this Cyber Gray car which had all of 30 miles on her. The bone stock SAE adjusted number came in at 530 rwhp and 508 ft-Lbs of torque. After making some tuning adjustments, we see the SAE adjusted numbers rose to 567 rwhp and 532 ft-lbs of torque. The dyno sheet is below:
The second Corvette ZR1 was Black and unfortunately seemed to be having some clutch slipping issues which can skew the dyno numbers we’re told. Alvin mentioned in his post that the guy who brought the car into PCMforLess where the dyno was performed said the car was acting fishy and smelled of “clutch”. That’s too bad for a Corvette with all of 200 miles on her. We don’t see a sheet for the initial run, but read that it was 540 rwhp. With the tune, Alvin was able to boost rwhp an additional 17 but the clutch slip makes this a moot point.
Averaging the two Corvettes, you get 535 rwhp, which is on par with the 15% average loss rule of thumb. Alvin said that the stock tune was pretty rich as well as the fact that once the engines loosen up after a few thousand miles they will usually provide a higher base number.
UPDATE: Check out this VIDEO of another Corvette ZR1 that pulled 549.9 RWHP on the dyno.
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Corvette | Vette | 2009 | ZR1 | Dyno | Hendricks | Tune | Horsepower | Torque