PDA

View Full Version : G8 GXP Dyno Tune


sharkie
03-06-2009, 02:00 PM
Here's the results of the dyno tune for my GXP, M6. Only mod is a Cold Air Intake. Running on 93 Octane. There are a few extra baseline runs because we were having some issues with the A/F readings.

Baseline: (368hp / 372ft-lbs)
http://i637.photobucket.com/albums/uu96/sharkie0002/20090211-dyno.jpg

After Tune: (385hp / 391ft-lbs)

http://i637.photobucket.com/albums/uu96/sharkie0002/20090305-dyno.jpg

The timing retard in the Baseline between 3000-4200 was caused by torque management. We could never get rid of the retard at 5200-5400 RPM, though. Can any of you Dyno experts out there think of a reason for pulled timing at the 5200-5400 range?

Note: Although it was turned off between test runs, no attempt was made to cool the engine.
GRRRR8
03-06-2009, 02:21 PM
I think that is a combo of heat soak cat-overtemp.
It's A G8!
03-06-2009, 03:41 PM
Nice!!
fiveoh
03-06-2009, 09:40 PM
Very nice
p71
03-07-2009, 12:12 AM
Looks like these have a more aggressive tune from the factory than the GT... great numbers though.
Blackdevil77
03-07-2009, 03:16 AM
Insane numbers. So.....much.....jealousy!!!! This makes me want the cam even more now.
99-LS1-SS
03-07-2009, 05:18 AM
I wonder how much a set of headers will do for the GXP?
-Ray-
03-07-2009, 05:27 AM
Nice numbers. Now I need a cam too.
Blackdevil77
03-07-2009, 08:34 AM
I wonder how much a set of headers will do for the GXP?

Well over 400 rwhp. I'm gonna guess around 420 rwhp with the ARH system and some tuning.
xfactor
03-07-2009, 01:05 PM
Computer tells a great story, but now how does she feel to you?
GeorgeInNePa
03-07-2009, 01:10 PM
Well over 400 rwhp. I'm gonna guess around 420 rwhp with the ARH system and some tuning.

I'm going to say 410ish.
NAiLs
03-10-2009, 01:31 PM
Little late on my reply, but holy jebus. Quite the awesome numbers! :woohoo:

Much jealousy over here too!!
'02 ws6
03-13-2009, 05:17 AM
I'm going to say 410ish.

You think it'll be that low? I'm guessing in the 420s as well. The GTs are getting some pretty good #s out of their LT/Xpipe swaps. Regardless that's still unreal that its not even modded and knocking on 400rwhp's door. gonna be interesting when the guys with money to blow start going internal and FI on these badboys. I can hear 500rwhp NA, can anyone else?
BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104
MtbDoc
03-14-2009, 09:29 AM
You think it'll be that low? I'm guessing in the 420s as well. The GTs are getting some pretty good #s out of their LT/Xpipe swaps. Regardless that's still unreal that its not even modded and knocking on 400rwhp's door. gonna be interesting when the guys with money to blow start going internal and FI on these badboys. I can hear 500rwhp NA, can anyone else?
BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104

Remember, you are already starting out with a LOT more cam than the G8. As a result, you aren't going to see the same magnitude of improvement with a cam swap. Now, adding a blower will be like adding a small cam + blower to the GT. 500 rwhp is NOT going to happen NA without a RADICAL cam or increased cubes.