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Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-11-2004, 01:25 PM   #11
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I like to think the 4.0L Aurora V8 is comparable to the GXP, based on those number ( and no I havent dynoed my car) I could probably match it if not exceed it.

Interesting...
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Old 07-11-2004, 03:08 PM   #12
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Quote:
Originally Posted by Jim W
I like to think the 4.0L Aurora V8 is comparable to the GXP, based on those number ( and no I havent dynoed my car) I could probably match it if not exceed it.

Interesting...
Yeah, Jim'* Rora had some balls back in March. And that was even before the K&N, gutted airbox, and the high-flo cat.

I bet Canadian snow ba.... er white Aurora can really scoot now and would probably give a stock GXP a run for it'* money.
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Old 07-11-2004, 03:34 PM   #13
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No replacement for displacement
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Old 07-11-2004, 03:46 PM   #14
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Quote:
Originally Posted by BonneMeMN
No replacement for displacement
Stickers. My buddy with a Geo told me just last week.

That'* hard luck starting out with numbers I hope to beat in my 231...
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Old 07-11-2004, 04:05 PM   #15
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GM reads this Forum quite regularly I've spied some obvious IP addresses over the last year or more. This is good info for them, and Scott Cook is no stranger to GM. They know very well who he is, and out of all of us, he has the chance to actually have some influence on them.

GM Engineers aren't fools. Leveraged design saves time and money.

Go Scott, GO!
(See Scott go )
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Old 07-11-2004, 04:09 PM   #16
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Quote:
Originally Posted by BonneMeMN
No replacement for displacement
I'm not so sure about that Forced induction engines while a little more tempramental and maybe more prone to breakage can compete quite handily with large displacement motors.
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Old 07-11-2004, 04:18 PM   #17
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I've been thinking about the breakin theory here. It has merit. I bet it would dyno closer to advertised numbers with about 30k on the ticker. My 98Z71 did. With no mods until that point.
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Old 07-11-2004, 04:35 PM   #18
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Default First GXP Dyno Numbers

http://www.caranddriver.com/article....&page_number=1

For Rogue from Marlon: Just trying to pass on some info read the above link. I'll be waiting for your discussion. Thanks
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Old 07-11-2004, 04:46 PM   #19
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We had forced air directly to the intake and a larger high CFM fan to take away engine heat. It wasnt a 7,000 fan pumping 75 mph winds, but it was adequate. I would suspect more the calculations the dyno used on ambient temp and moisture to calculate HP before I did wind speed although Scott says the GXP feels slow on the street and he can't get his tires to spin even standing on it from a dig.

The autotap log we did on his car showed him getting knock, im some cases quite a bit. He may have some sort of restriction in the engine due to an engine built on a Monday or Friday (not quite right) or it may have just been the heat of the day (cars were regestering about 90F) but somethign was off on it.
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Old 07-11-2004, 04:48 PM   #20
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Marlon, Scott Cook and the Intense crew know more about performance and dyno'* than any of us would ever hope to learn in 5 lifetimes. They cut their teeth on it, and everything they do is based on hard facts and true, definable numbers.

They have a very good dyno setup, and use it correctly. Including with air
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