📰 Auto News Corvette ZR1 Independently Dynos 530 Rear-Wheel Horsepower

[Mook]

NASCAR’s Hendricks Motorsports picked up five Corvette ZR1s at the Corvette Museum in Bowling Green last week with Jeff Gordon and Jimmie Johnson in tow. They promptly dropped two of the cars straight on a dyno in North Carolina to see just what the super-Vettes were making at the rear wheels. The results? 530 HP and 508 ft-lbs of torque. Considering the flywheel power is 638 HP, these figures are in line with the rule-of-thumb 15% driveline losses for rear-wheel-drive cars. After some tuning and adjustment, they managed to bump it up to 567 HP and 532 ft-lbs. Anyway, check out the complete dyno sheet yourself.

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[Shibby50]

yeehaww

 

[PANDA]

 

[02BlueGT]

Yeah, Lets dyno a motor before it is broken in, or the computer has had enough time to learn fuel trims.....if they had given the car 1 - 2 months of driving and then dynoed, I think it would have had 10 - 15 more HP

 

[Mook]

but really, would 10-15hp make a difference? factor in the 15% drivetrain loss, and its right on target

 

[02BlueGT]

Yeah, not much of a difference, but I still don't understand them taking a fresh motor onto the dyno, unless it is broken in at the factory

 

[esteinmaier]

Many people forget that the best break in uses higher cylinder pressures to press the rings against the cross-hatching. Considering that's the only place in the bottom end that there's metal moving against metal, a weak break-in seems like a really stupid idea. I broke mine in at about 25psi.

 

[CamaroSS]

works for me, its right on where it should be... dont forget, these motors dont appear to have the over the top underrating we saw with ls1's and such. those were dynoing within 20-30 hp of their advertised numbers and sometimes less than that.

 

[bluzohh6]

word

 

[Poopshinanigans]

It doesn't say if someone drove them from bowling green to the dyno place in NC. That would probably be enough mileage to break it in. if they go straight to charlotte then its a little under 500miles. Is that enough break in miles?

 

[bluzohh6]

Thats what I was thinking.

 

[Poopshinanigans]

the auto blog story says it had only 30miles on it, so i guess they trailered them.

 

[Turk]

All of GMs cars have the backing of some company proving their HP now, don't remember the name. The z06 went from 500hp to 505hp once this started happening. GM does NOT underrate any of their cars anymore.

 

[Mook]

thats what ive been reading...the days of that more or less stopped w/ the camaro

 

[Stink Star]

a hard break in is the only way to go! and by that i mean taking the revs up high and letting them back down several times in 2nd or 3rd gear within the first 20 miles. i did my civic like that and i never burned a drop of oil. just make sure the engine is warm first. ONLY PROPER WAY TO SEAT THE RINGS