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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 09-25-2011, 09:08 PM   #1
mag2camss
 
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a6 no good?

There is a guy I know with an a6 camaro ss with heads and cam and barely made it to 400rwhp. He told me the automatics dont respond well to mods and I have never heard such a thing but is this true?
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Old 09-25-2011, 11:41 PM   #2
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Quote:
Originally Posted by mag2camss View Post
There is a guy I know with an a6 camaro ss with heads and cam and barely made it to 400rwhp. He told me the automatics dont respond well to mods and I have never heard such a thing but is this true?
Typically you can figure on a 20% drive train power loss with the automatic... Most of the new Auto's are putting 320 or so to the ground bone stock, and the LS-3's are putting down 350-370 bone stock... The gearing makes up the difference when stock and so unless there is a good driver, the point and shoot cars will win a drag race... the manuals will win a rolling start race...

You didn't mention any exhaust modifications with the mods...If the stock exhaust is still on it... that would help, if he has long tube headers, he may still be in the ball park depending on a number of factors... cam specs, temp and type of dyno...

Dyno numbers should only be used as a tool... Do a baseline dyno and then after mods and tuning, do a follow up dyno to determine the gains... This tells you what you need to know... Dynos are almost always going to vary from shop to shop, and even within the same shop depending on who is running it, temps etc...
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Old 09-26-2011, 01:17 AM   #3
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to a tee.

Auto's respond to mods just as good as manuals do.
But they will always post lower numbers than an exact same modded LS3, due to the extra drivetrain loss. (About 15% compared to 20%)
But as stated, the auto will almost always win in a drag race, between two identically modded cars.
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Old 09-26-2011, 08:31 AM   #4
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Now I understand. Thanks for the info guys!!
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