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Discussion Starter · #1 ·
I have a 2005 gt Im wanting to put a turbo kit turbonetics kit or a hellion kit on. I was thinking dual t3, or t4s but I want to know how much the stock setup can handle. I plan on building the motor eventually
 

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most say 450 with a rich tune is safe, the internals of those GT's are not forged so gotta be careful. In the end its all about the tune (if its done right) and how you treat it.
 

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OP,

I would stay in the 425-440rwhp range. Anymore and you're really pushing the bottom end. Plus, if you plan on doing a lot of 5th gear pulls, I would stay close to 420rwhp range. Cast pistons do not like extended cycles of heat!

Shane
 

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Good info to know..was wondering that myself as im trying to decide if I want to keep and build up my 07 or get a 5.0. If I can get near the 425 range without having to build the motor to take it might just keep it.
 

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Brenspeed has a kit that they quote as 560hp on the 05-10 4.6. Sheer insanity!
 

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I have that brenspeed kit. I beat on her every once in awhile not problems yet. Brenspeed is awesome.
Did you upgrade to forged internals?
 

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Ya I know, I'm saying that kit probably makes 560ish HP to the flywheel
 
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