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Old 02-10-2009, 06:28 PM   #1
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GXP Dyno and Weight results..interesting

Hey, decided to check out the G8 boards. Was interesting to see the GXP rated at 415hp put down 370hp to the wheels..sounds pretty good. Also the weight is supposed to be 4000+...came in at 3992 with 85lbs of gas in it. So looks like the GXP's might be closer to 3900lbs dry. They might be a better comparison to the camaro than previously thought.

Dyno pics
http://www.g8board.com/forums/showth...228#post164228

Weight pics
http://www.g8board.com/forums/showthread.php?t=10703
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Old 02-10-2009, 06:38 PM   #2
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interesting weight info
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Originally Posted by hsdguru View Post
31000 for ss1 no options and who in the hell would buy a SS1 V6 for kids SS1 for girls LS3 the only way to go G8 Gxp 200lbs more my bad so lets think here 200lb more 27 less hp so 5 tenths slower now 373 gear now mabe 3tenths slower 4 door car sad so so sad
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Old 02-10-2009, 07:04 PM   #3
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at your sig... I remember that EPIC FAIL of a thread!!
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Old 02-10-2009, 07:47 PM   #4
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What does GM say the GXP weighs, and what do they say the Camaro weighs? I would think that they did not weigh the cars differently, so I would think if they show a weight difference, there is a weight difference. Can't say for fact, but it seems to make sense to me, and cars are like snowflakes when it comes to dynos. Same car, factory set-ups and you might get quite a difference in hp. Like I said I am no expert. I have seen from experience 2 cars same factory yrs and models pull a difference of 30 hp and 20 ft-lbs of torque. Just a thought. Great hp numbers anyways, don't know bout the weight thing for sure though.

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Old 02-10-2009, 08:01 PM   #5
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Quote:
Originally Posted by CDBiker220 View Post
Hey, decided to check out the G8 boards. Was interesting to see the GXP rated at 415hp put down 370hp to the wheels..sounds pretty good. Also the weight is supposed to be 4000+...came in at 3992 with 85lbs of gas in it. So looks like the GXP's might be closer to 3900lbs dry. They might be a better comparison to the camaro than previously thought.

Dyno pics
http://www.g8board.com/forums/showth...228#post164228

Weight pics
http://www.g8board.com/forums/showthread.php?t=10703
so only 11% loss of power?

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at your sig... I remember that EPIC FAIL of a thread!!
I think you mean epic fail of a poster.
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Old 02-10-2009, 08:09 PM   #6
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I posted this here: http://www.camaro5.com/forums/showthread.php?t=13027 a few days ago. But yes, its still quite impressive what the LS3 can accomplish. What do you think, 380rwhp for the SS M6?
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Old 02-10-2009, 08:43 PM   #7
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from what ive seen with the vettes, ranging from 375-390whp, i think 380whp is a realistic estimate for the camaro. Also in that dyno thread, note the tuner said timing was at only 15.5 degrees in the GXP whereas it was at 22 in the stock vette LS3's they dyno'ed....that they tuned to 25 degrees. I have a feeling the camaro timing lies somewhere inbetween those two. Seams that the differences in horsepower in the LS3's are all in the tune.
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Old 02-10-2009, 08:49 PM   #8
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If the 11% loss at the wheel stays true we are seeing 379HP at the wheel.
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Old 02-10-2009, 09:03 PM   #9
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Also i just wanted to note that he also mentioned his car is a sunroof car, so it has added weight there too, still coming in at 3909 with an empty tank, one without a sunroof might be closer to 3880. The official dry weight of this car is 4050. Someone mentioned that the camaro is likely weight the same way. Maybe it will come in at a lower actual weight too.
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Old 02-11-2009, 12:24 AM   #10
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I think we will see about the same 370 at the wheels because the GXP has the same IRS and Trans that we will be getting.

How big are the wheels on the GXP? Heavier wheels really do make a difference on the dyno and on the streets.

And that weight is pretty close to the SS weight which is discouraging because the GXP is a FOUR door car and ours is a coupe!!!!

EDIT: That is about 70 more RWHP than the 4th Gen Camaros with about 450 more pounds. With the common 100lbs=10 RWHP conversion, the SS should be about 25 RWHP faster than a LS1 Camaro, or about the same as a 4th Gen with a set of Long Tube headers and lid, which usually results in a car that runs mid to mid-low 12's in the quarter mile.
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Old 02-11-2009, 05:59 AM   #11
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There is nothing to indicate that the Camaro should put more to the wheels. Same drivetrain so it should be in roughly the same area. Keep in mind the vett will always put more power to the wheel's. The torque tube and rear end are more effecient than the zeta system.
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Old 02-11-2009, 08:48 AM   #12
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The GXP is rated at 415hp whereas our camaro is rated at 426. Probably all in the tuning...but still..that gives a good reason why it probably will put atleast alittle more to the wheels with the same tranny and IRS. Also if the GXP is lighter than the official spec than who's to say the camaro wont be lighter than the official spec?
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Old 02-11-2009, 09:32 AM   #13
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Great numbers, IMO. I can't help but wonder if GM is underrating the LS3 or if that powertrain and IRS that efficient. Either way, our SS is going to rock!!! Great find. I go there to snipe information too, LOL!
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Old 02-11-2009, 11:10 AM   #14
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Glad im not the only one that goes there to find out info. I was over there looking at the CAI that will be coming from Vararam for the G8 GT. Hoping there is one for the Camaro soon after release.
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