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Old 09-16-2010, 12:30 AM   #1
Ernie@P
 
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Top Secret: z28 dyno numbers

just got some info today from a lil birdy; GMPP used a local dyno here to do some testing. The Z28 made8 489RWHP. with a set of custom headers it picked up 44 rwhp. sorry to let the cat out of the bag
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Old 09-16-2010, 01:21 AM   #2
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Sure would like to know how accurate this info is.
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Old 09-16-2010, 01:22 AM   #3
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Old 09-16-2010, 01:59 AM   #4
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if true... that's around 575hp @ the crank w/ a 15% loss. interesting, but sketchy @ best (no disrespect)
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Old 09-16-2010, 02:35 AM   #5
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hope this turns out accurate, but i'm not getting my hopes up until gm says something or I see proof
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Old 09-16-2010, 05:24 AM   #6
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Quote:
Originally Posted by Ernie@PSR View Post
just got some info today from a lil birdy; GMPP used a local dyno here to do some testing. The Z2 made8 489RWHP. with a set of custom headers it picked up 44 rwhp. sorry to let the cat out of the bag
I know its fun to get specific info like this and let it out, but it can be potentially damaging the Z28 program and your local shops prospects of ever working with GM again. That being said, they sure have been going out of their way for the last month or so to tease everyone so it can only be expected. It sure would be cool if the factory could squeeze out an even 500 at the wheels.
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Old 09-16-2010, 07:22 AM   #7
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Hmm.

Why would GMPP need to go to a 'local dyno' to test an upgrade on GM's new engine?

GM has the facilities to do that sort of testing themselves ...
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Old 09-16-2010, 07:26 AM   #8
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Pre-messaging is all the rage these days in marketing. That's why you see spy shots of the z tooling around towns and "secrets revealed" articles in magazines. It helps build buzz.
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Old 09-16-2010, 07:51 AM   #9
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Yeah, GM had to go to some little shop to use their dyno....
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Old 09-16-2010, 08:42 AM   #10
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Quote:
Originally Posted by Ernie@PSR View Post
just got some info today from a lil birdy; GMPP used a local dyno here to do some testing. The Z2 made8 489RWHP. with a set of custom headers it picked up 44 rwhp. sorry to let the cat out of the bag
It made 8489WHP. Holy crap, I hope GM cand find a way to hook that $h!t up... Name:  thud.gif
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Old 09-16-2010, 08:48 AM   #11
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I hope Im not wasting my time building my SS up.
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Old 09-16-2010, 08:52 AM   #12
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If true the z28 will come well built up. But a built up SS is always a good thing. :-)
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Old 09-16-2010, 09:14 AM   #13
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Well, what does a CTS-v put down with a set of headers? I think it should be close to that same number then I'm sure a small tweaking of the tune will easily put 500 to the wheels
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Old 09-16-2010, 09:43 AM   #14
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Originally Posted by Evil35th View Post
Well, what does a CTS-v put down with a set of headers? I think it should be close to that same number then I'm sure a small tweaking of the tune will easily put 500 to the wheels
http://www.cadillac.com/ctsV/2010/features-specs/

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