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Old 08-28-2009, 04:26 PM   #1
SGOS252382


 
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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: http://www.gmhightechperformance.com...deo/index.html

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 05:40 PM.
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Old 08-28-2009, 05:01 PM   #2
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Is this the latest issue? I'll have to pick it up!!
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Old 08-28-2009, 05:02 PM   #3
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Originally Posted by toehead93 View Post
Is this the latest issue? I'll have to pick it up!!
Yes, I just got it in the mail.
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Old 08-28-2009, 05:04 PM   #4
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That's some great work! I may have to get this read.
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Old 08-28-2009, 05:14 PM   #5
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That's about 100 ft/lbs @ the crank!
Hey GM!
Release an OPTIMIZED updated tune for us PLEASE!!!!!!!

Last edited by patriotpa; 08-29-2009 at 06:46 AM.
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Old 08-28-2009, 07:37 PM   #6
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PCM FOR LESS, Brian Herter, tuned a L99 from 305/ 300 to 327/ 342 (before anyone knew about the 5/ 20 fuse) how I wonder what that Camaro is at.
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Old 08-28-2009, 09:44 PM   #7
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Thats awesome, I will have to read more about this... Good Find!
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Old 08-29-2009, 06:28 AM   #8
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Originally Posted by 1camaro70 View Post
PCM FOR LESS, Brian Herter, tuned a L99 from 305/ 300 to 327/ 342 (before anyone knew about the 5/ 20 fuse) how I wonder what that Camaro is at.
The fuse pull obviously helps the Camaro's stuck in the low octane tune. But even the high octane tune is weak under the curve (below 5000 rpms) as reported in the magazine article.

And wow, that's a serious jump in Torque. Even the "normal" L99's seem to be making a solid 30 ft lbs of torque under the curve (from 3500-5000 rpms) with a good tune.
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Old 08-29-2009, 07:16 AM   #9
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Quote:
Originally Posted by SGOS252382 View Post
Did you guy see the write up on the L99 in the November 2009 issue of
GM High Tech Performance Magazine?

Umm... November?! wtf? did you mean 2008?!? It's not even Sept and they're putting out a rag dated November?
... holy crap are you sure that's not a typo
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Old 08-29-2009, 07:34 AM   #10
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those are some serious gains for a tune, they detuned that thing to hell. im sure l99 owners will be happy to know the potential gains when they are ready for their first tune
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Old 08-29-2009, 07:55 AM   #11
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He is a very good tuner here in Florida

I am meeting with GM High Tech editors Sunday and our car will be in an up coming issue as well.
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Old 08-29-2009, 08:50 AM   #12
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Quote:
Originally Posted by Capstone View Post
Umm... November?! wtf? did you mean 2008?!? It's not even Sept and they're putting out a rag dated November?
... holy crap are you sure that's not a typo
No, its the November 2009 issue. I guess they give themselves a few months head start so the people in far away places don't think there getting the magazines late.
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Old 08-29-2009, 09:45 AM   #13
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They did screwed up months because the don't run 12 issues a year; they run 10.

I got that issue yesterday too, and I'm a little ticked they couldn't run any times. Considering they got similar gains on a G8 GT on a dyno', and picked up something like almost a half second improvement in the 1320', I think it'd be safe to say Camaro would get at least as good a gain. It seems, to me, like all the videos show the cars short-shifting before 6K RPMs. I think a lot of these tunes make the shifts closer to 6000-6200 RPMs. I think there are good gains to be had just from a simple engine tune and reprogramming shift points, firmness, and speed.

Good catch!!! I was going to post this article
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Old 08-29-2009, 09:49 AM   #14
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Every month I get my new issue.....late. Weeks late. Then with that issue I receive a "this is your last issue/resubscribe now" notice. Been like that since my first issue last year. Im paid through jan 2010. Awsome.
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