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Old 09-26-2011, 02:28 AM   #1
GrumpyGoat
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My Dyno Day at 21st Century Muscle Cars

So, I went to 21st CMC to use my gift from Goatfest 7(free dyno tune) and found out my ECU is locked out from some previous tune. I was informed that I can purchase a new ECU and have it installed and then tune it, I also read in the Corvette Forum that I can have the ECU reflashed with a stock tune at the dealership and then retune it. I don't plan on doing any hardcore racing with my current car so I won't be getting anything reflashed for now. Anyway not all was lost as they went ahead and put my car on the dyno just to see what numbers I was putting down, on the second pull I got 366.5rwhp/387.7rwtq which isn't too bad I suppose. The other good news is they did it for free and threw in two free t-shirts and decals to boot, plus I can take my G8 GT and they will tune it instead, just need to make some time to make the trip again. Anyway it was cool spending time there and checking out all the cool cars and goodies on hand, hats off to Matt and the guys there at 21st Century Muscle Cars in Addison TX.



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05 GTO A4, CAI, Kooks LT, Catted, Corsa Sport, Drilled/Slotted Rotors, 18/19 Beyern Type 5,
BMR strut brace, LPE fuel pump, 6000K HIDs.
Dynoed at
21st Century Muscle Cars in Addison, TX
366rwhp/387rwtq

Last edited by GrumpyGoat; 09-26-2011 at 02:31 AM.
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Old 09-29-2011, 11:32 PM   #2
GrumpyGoat
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Where is everybody? Just wanted some comments on what you guys and gals think of the numbers, not sure where they should be, some feedback from the dyno savvy goats would be appreciated.

Hello, is this thing on???
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05 GTO A4, CAI, Kooks LT, Catted, Corsa Sport, Drilled/Slotted Rotors, 18/19 Beyern Type 5,
BMR strut brace, LPE fuel pump, 6000K HIDs.
Dynoed at
21st Century Muscle Cars in Addison, TX
366rwhp/387rwtq
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Old 09-30-2011, 12:12 AM   #3
MannyLobo
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I wish I could have more input for you...

I'm still running bone stock, and I only have an LS1. Don't the Stock LS2s dyno around 340 - 350 whp? So... with a CAI, and catted LTs, you went up to 366. Not bad, actually...

Even bigger gain on the TQ.

Sucks about the ECM lock, though. Do you plan on doing anything about that in the future?
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Old 09-30-2011, 02:33 AM   #4
Rabs
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Yeah dude 366 isnt bad at all. With exhaust, LT headers, ca intake, and tune, mine was at 357 rwhp... Haven't re-dyno'd since my cam install, though.
I'd be happy with your #'s at this point
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Old 09-30-2011, 03:41 AM   #5
GrumpyGoat
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Thanks guys for the reply, I was nervous about what the outcome would be but if it's fine with you guys then I shouldn't complain about it. As far as the ECM, I'm not sure if it will be changed unless I install other mods like a cam and then it might be a problem.
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05 GTO A4, CAI, Kooks LT, Catted, Corsa Sport, Drilled/Slotted Rotors, 18/19 Beyern Type 5,
BMR strut brace, LPE fuel pump, 6000K HIDs.
Dynoed at
21st Century Muscle Cars in Addison, TX
366rwhp/387rwtq
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Old 06-18-2012, 01:51 PM   #6
youngGOAT2004
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Hey Grumpygoat, you bought some tires from me awhile back, and told me to join the site! just wondering if you could help me out? Im looking to get my 2004 gto tuned wondering if you knew anyone with a computer that could flash mine/tune it for me?
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Old 09-17-2012, 06:19 AM   #7
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John Paige is a first class guy, 21st Century is a great shop. Those numbers are not out of line from what I have been seeing. Real test is in driveability and performance.
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