2008 G8 GT reaches the dyno (with video) - G8Forum.com - Pontiac G8 Discussion Forum
User Tag List

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 03-19-2008, 09:51 AM Thread Starter
Join Date: Nov 2007
Posts: 77
2008 Pontiac G8 GT on the Dyno

The new Pontiac G8 GT on the dyno! The 6.0 liter small block V8 engine pumped out 286.62hp on the first run. With a bit more tuning the second run yielded 310.37hp. Remember, this is to the wheels so the 360hp that Pontiac claims is looking to be very accurate!
dascrow is offline  
Sponsored Links
post #2 of 4 (permalink) Old 03-30-2008, 09:47 AM
Join Date: Mar 2008
Posts: 3

Looks to be great numbers. What actual "tuning" was done to get to the 310rwhp?
Reading a review on how this car matched a Charger SRT8 on all accel tests makes me believe that these may be a little underated on advertised hp.

S351R is offline  
post #3 of 4 (permalink) Old 04-02-2008, 07:14 AM
Join Date: Mar 2008
Posts: 4
The days of "underrated" HP are gone. The combination of J2723 and J1349 requires that the rated HP be an accurate number. Previously, interpretations and loopholes allowed manufacturers to underrate or overrate their engines slightly. Long ago, they were able to do so by large amounts.

But now the rated number is the actual number, and production models are not allowed to vary from the rating by more than 2% in the U.S. and 5% in Europe.

If the dyno shows a number which results in someone believing that the engine isn't within 2% of the advertised HP, then either their assumed drivetrain loss is wrong, or the dyno isn't accurate, or something went horribly wrong in the production of that one specific vehicle and it is not the norm. The first two are most likely with today's production tolerances.
Scissors is offline  
post #4 of 4 (permalink) Old 04-03-2008, 08:02 PM
srg963's Avatar
Join Date: Dec 2007
Location: Carolinas
Posts: 30
I believe that manufactures can down tune the car, so that it yields a lower HP than the equal setup on a different vehicle?
srg963 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the G8Forum.com - Pontiac G8 Discussion Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome