Hi,

New to the board, awesome site. I'm thinking about buying a 2006 GT and upgrading the power N/A. I know nitrous or a blower is the cheaper route. I curious what you could do N/A. To make serious power this thing would have to spin over 6000 rpm. I want about 360-380 rwhp. I'm guessing its possible around 6000-6200 rpm. To take advantage of the high-end power, I would probably want a redline near 6,800 rpm. That way on a shift she's still on the cam. Can a stock GT block take this kind of rpm? I think the weak link is the valve train. The head work would fix that. I appreciate your input.

 

From my experiences at the dyno the engine with a tune/CAI/full exhaust will most likely stop making power at 6000 RPM. The engine does pull much higher without trouble but power drops off. As with any engine buildup the RPM limit is variable when you consider what internals you will be replacing as well as the flow characteristics of the intake/heads/exhaust you have. I would suggest speaking with someone at Sean Hyland Motorsports or Livernois Motorsports as these vendors have some experience in this area already and much experience with the 4.6 reciprocating assembly.

 

Maybe dangerous, but I have my rev limiter set at 7000 rpm. I powershift at 6400, giving me the room for the rev w/o shutting off the fuel.

 

To everyone thanks for the replies.

I'm thinking a Ford Racing intake, Cobra racing 4V heads and cam kit can bolt on the block. The modular family. These parts should rev and make power close to 7000 rpm if the block and accessories can take it. Looking at the math, I would probably need 320 rwtq to make 370 rwhp around 6200 rpn. Is this possible?

 

just get some good springs and a 03/04 cobra short block