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Forced Induction Superchargers | Turbochargers | Intercoolers

turbo advice please

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Old Aug 28, 2011 | 12:46 PM
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Default turbo advice please
Well I just bought a 97 c5 vette. It has a 408 forged iron block with ls3 heads and intake. With epp blower cam. hinson single t76 turbo. And a water to air intercooler. And 60# injectors. In doing research I find that this Turbo is to small for the 408. This is my first Turbo car. And like to make750+ rwhp. I plan on swapping out intercooler to a air to air. What Turbo would I need to feed it. A t88 is what I'm think. Any advise is welcome. Thanks
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Old Aug 28, 2011 | 12:51 PM
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I am not familiar with Gibson turbos do you have a link to where specs can be found?
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Old Aug 28, 2011 | 01:01 PM
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sorry my phone changed the word. its a hinson super cars single turbo kit
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Old Aug 28, 2011 | 01:04 PM
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What brand of turbo is more important than the size.

I would think atleast a 80mm would be in need though.
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Old Aug 28, 2011 | 01:20 PM
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also i have to have a 3inch down pipe and t4 flange.
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Old Aug 28, 2011 | 01:55 PM
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what kind of power can i make with the t76 i have now on a 408. car need to just be finshed up and takin to tuner. also sd tune or use a maf?
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Old Aug 28, 2011 | 01:59 PM
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you would definately see a gain from upgrading from 76 to 88
i would also upgrade down pipe to 4"
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Old Aug 28, 2011 | 02:25 PM
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What brand turbo? That 76mm will still be the choke point of the setup though.
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Old Aug 28, 2011 | 02:28 PM
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3inch dp has to stay. No room for bigger. Probably do a cut out once the pipe gets down under the car.
Last edited by regblkss; Aug 28, 2011 at 03:29 PM.
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Old Aug 28, 2011 | 06:27 PM
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3 in will hold that 408 back big time. Make the 4 in work, notch or oval if you have too...use 3.5 in at least...
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Old Aug 29, 2011 | 07:01 AM
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Originally Posted by turbo iroc
3 in will hold that 408 back big time. Make the 4 in work, notch or oval if you have too...use 3.5 in at least...
i agree
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