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What gears to run with T76

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Old Jun 28, 2009 | 07:31 PM
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Default What gears to run with T76

I have a M6 camaro with the stock 342s an sts kit with T76 turbo what would be the best gear to run for that set up? I don't hit boost till around 3500 rpm

Last edited by Jerred p; Jun 29, 2009 at 03:31 PM.
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Old Jun 28, 2009 | 09:23 PM
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I run 3.25 gears full boost at 2900-3000rpms. But I have a very different setup.
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Old Jun 28, 2009 | 09:47 PM
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3:55.....
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Old Jun 28, 2009 | 10:56 PM
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I'd run the 3.55 as well
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Old Jun 29, 2009 | 08:25 AM
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3.23 i run
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Old Jun 29, 2009 | 08:42 AM
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Gear it to redline at the end of the quarter in 4th gear.
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Old Jun 29, 2009 | 09:21 AM
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I've seen good results with 3.55s in a ~3000 lbs car.
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Old Jun 29, 2009 | 10:30 AM
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3.42-3.55 works good for most 6spd cars.
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Old Jun 29, 2009 | 10:35 AM
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The real question is, why is it coming in so late at 3500?

exhuast?, coatings? wrap? quick spool? housing size?current gear ration, tire size, injectors, fuel delivery........etc etc.

Any one of those could effect the set up .....it wont do any good to gear it for 130 mph, if you dont have enough injector to make the power to go 130....People are telling you a gera to run, but dont know what gear you run now, or what tire, or what tire size? Lets see,,,,,,,,here is my blindfold, let put it on first.
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Old Jun 29, 2009 | 03:46 PM
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Originally Posted by 1320
The real question is, why is it coming in so late at 3500?

exhuast?, coatings? wrap? quick spool? housing size?current gear ration, tire size, injectors, fuel delivery........etc etc.

Any one of those could effect the set up .....it wont do any good to gear it for 130 mph, if you dont have enough injector to make the power to go 130....People are telling you a gera to run, but dont know what gear you run now, or what tire, or what tire size? Lets see,,,,,,,,here is my blindfold, let put it on first.
I have in line an in tank 255 fuel pumps with 60lbs inj so that shouldn't be the problem it has the stock 342s now.... will 390s be to much?
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Old Jun 29, 2009 | 03:58 PM
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Originally Posted by Jerred p
I have in line an in tank 255 fuel pumps with 60lbs inj so that shouldn't be the problem it has the stock 342s now.... will 390s be to much?
you want a taller gear when you have a turbo to keep load on it and help spool quicker...

wrap the whole hot side and keep your gears if they're 3.42's or go to 3.23's

just wrapping the hot side will increase your spool time a decent amount
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Old Jun 29, 2009 | 04:38 PM
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Originally Posted by nastychevelle
you want a taller gear when you have a turbo to keep load on it and help spool quicker...
If that were the case, just start off in 6th gear. You should have lightning-quick spool like that!
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Old Jun 29, 2009 | 04:47 PM
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Originally Posted by engineermike
If that were the case, just start off in 6th gear. You should have lightning-quick spool like that!

lulz!
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Old Jun 29, 2009 | 10:55 PM
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3.23's work nice on the street for a properly setup turbo LS1 6-speed car, sweet mph from a roll too . Since its a sts rear mount i wouldnt go too high in gear (numerically) since it would kill it even more, i'd leave the 3.42's or lower in there. Nothing more than 3.55's like mentioned above for sure.
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