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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 08-26-2009, 10:35 PM   #51
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This is interesting. When I first got my car the first 300 miles my car would report "shift denied" fairly easily. I thought that the acceleration was a little slugish. Somewhere after 300 miles it was like everything just "turned on". When I downshift the computer blips the throttle like I would with a manual and it will downshifts at higher RPM's than before. The performance all around just got better. I thought that there was something in the computer detuning it during a breakin cyle but it might have just been the computer reading a lower octane gas from the dealer's first tank.
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Old 08-27-2009, 10:26 AM   #52
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I luv that throttle blip
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Old 08-27-2009, 10:34 AM   #53
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Originally Posted by ibznu2010 View Post
Hey guys. Got 0-60 dynolicious 5.06 95 degrees Georgia heat. Added hennesey cold air. Adding headers & high flow cats & tune on monday 8-31-09. Also gets a dyno. Will let my state neighbors know the results. stay tuned. & how about that car ride you promised. Igot a car show coming up in Albany Ga. Lets get together. Power to the max.
Car ride? Who? Me?

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Heck I'd reset it anyway.


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Originally Posted by quickdraw View Post
This is interesting. When I first got my car the first 300 miles my car would report "shift denied" fairly easily. I thought that the acceleration was a little slugish. Somewhere after 300 miles it was like everything just "turned on". When I downshift the computer blips the throttle like I would with a manual and it will downshifts at higher RPM's than before. The performance all around just got better. I thought that there was something in the computer detuning it during a breakin cyle but it might have just been the computer reading a lower octane gas from the dealer's first tank.
Maybe it adjusted back to the upper table.
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Old 08-27-2009, 06:15 PM   #54
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No way it's just the octane rating. Sounds like some of these cars are putting out about 350hp at the crank the way they are running and dynoing.
That's LS1 power in a '04 GTO.
My '87 IROC advanced the timing when 91 octane or over was put in. It gained 10hp. I believe the 215hp rating was with the 91.
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Old 08-27-2009, 06:25 PM   #55
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No way it's just the octane rating. Sounds like some of these cars are putting out about 350hp at the crank the way they are running and dynoing.
That's LS1 power in a '04 GTO.
My '87 IROC advanced the timing when 91 octane or over was put in. It gained 10hp. I believe the 215hp rating was with the 91.

We're talking automatic (not 6 speed manuals). The L99 Camaro's that dynoed around 305 rwhp are off by about 20rwhp.
But the majority of the L99s are dynoing around 320 rwhp (on average).


On average, this is what most GTO's dyno. I owned two GTO's and I've seen more than my share of them dynoed.

04 GTO's (Automatics) dyno in the 280s rwhp.
04 GTO's (Manuals) dyno around 305 -310 rwhp.
05/06 GTO's (Automatics) dyno in the 320s rwhp.
05/06 GTOs (Manuals) dyno in the 330-340 rwhp range.
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Old 09-01-2009, 08:53 AM   #56
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The last run in this thread was like 5.4 in 90 degree temps and humid. If we had the 1 foot rollout it would be like 4.9-5.2 The 1 foot rollout is the same you get at the track and when they do 0-60 testing in the mags for wheel spin.
Right, Scott, rollout is just a way to mimick what happens at the track, which I've read a lot of mags and manufacturers do use. The Beltronics computer I used was set for a 12" rollout, so my best 0-60 of 4.80 (78degs., 63% humidity) might have been 5.1, 5.2 without it. The owners manual uses the example that if your car pulls .50G off the line, it will take .35sec. for it to travel 12 inches. Thus your times are .35sec. faster since the timer won't start until after the car travels 12 inches.



Yes, irpq, I couldn't take it any longer and finally got the nerve to see how quick it really was...or wasn't. Like JICPerformance suggested, I think a battery disconnect is a good starting point for guys with underperforming cars. Mine was disconnected for a couple of hours while the muffler delete was being done. That's the only thing that may have helped mine, although it may have been fine even before.
Have you gotten yours back yet???
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Old 06-12-2011, 12:26 PM   #57
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i have noticed my A6 is a bit slower then it feels like it should be... and i have after market CAI Exhaust mass airflow sensor and energy tune.
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Old 06-12-2011, 12:39 PM   #58
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i have noticed my A6 is a bit slower then it feels like it should be... and i have after market CAI Exhaust mass airflow sensor and energy tune.
This is a very old thread. This was an issue with a low octane tune. The fuse pull mod corrects this.

I see your tuned. I'm not familar with the "energy tune."
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