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View Full Version : GXP LT dyno numbers??



Oxygen
03-19-2009, 08:49 AM
I know a few guys have installed LT's on their GXP's. What happened to the dyno reports after the iinstall??

I am thinking maybe the improvement isn't as much as on the GT??

Oxygen

99-LS1-SS
03-19-2009, 09:22 AM
I didn't have time to get it dyno'd after my install. I will get it dyno'd in a couple of weeks though. The gains probably won't be as much because the GXP exhaust is less restrictive than the GT. We'll see though...

'02 ws6
03-20-2009, 07:34 AM
Curious as well.....I might even venture off to say it'll be close to the GT's gains.
BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104

p71
03-20-2009, 12:01 PM
bet you there will not be as big a gain as on a gt

99-LS1-SS
03-20-2009, 12:06 PM
bet you there will not be as big a gain as on a gt

I think you are correct.

c5racr1
04-09-2009, 02:47 PM
bet the opposite, bigger gains on the GXP then on the GT. same basic manifolds, and exhaust, but the ls3 is a much stouter engine than the l92. i would use 1 3/4 headers unless going with FI or nitrous. tried the 1 7/8 on my CTS v and lost a lot of TQ compared to gaining 3 hp way up top.

nino@gaypontiac
04-11-2009, 06:52 AM
Ill have dyno numbers by next weekend.

cowbiker
04-18-2009, 12:49 PM
Please note in posting if using 1 7/8" or 1 3/4" primary tubes on your LT's.

I would expect the GXP to make make more just based on the gains the LS3 vettes get with them.

Can't wait to do mine...soooon very soon.