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Old 08-28-2009, 05:26 PM   #1

SGOS252382's Avatar
Drives: 2010 Camaro 2SS/RS
Join Date: Mar 2008
Location: S.W. Florida
Posts: 6,296
GM High Tech Performance Magazine's L99 Tune - +81 ft lbs at 3500 rpms!

Did you guy see the write up on the L99 in the November 2009 issue of
GM High Tech Performance Magazine?

Link to video:

It's a real good read and talks all about the stock L99 tune.
Jerermy Formato tunes an L99 in the article and talks all about Torque Managment, A/F ratios, etc.

The stock L99 made 318 rwhp, 310 lb ft (bone stock), and the car ran 13.3 @ 105 mph in Florida heat (bone stock).
With the tune it made 330 rwhp, 337 lb ft of torque.

But that doesn't show the entire picture. The car made 81 ft lbs at 3500 rpms! It still picked up 43 ft lbs at 3750 rpms. It also made 54 rwhp at 3000 rpms, 30 rwhp at 3750 rpms, and 20 - 25 rwhp for most of the pull.
The numbers under the curve were amazing.

So you can't just go by the peak HP and TQ increase. The L99 is leaving tons of HP and torque on the table at lower rpms.

To bad they didn't get any track times after the tune (rained out). But its a great read for anyone with an L99.

So if you have an L99 you should get the issue and check it out.

Last edited by SGOS252382; 08-29-2009 at 06:40 PM.
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