aer you full bolt on? If you don't already I would look into a set of stainless long tube headers first (1 3/4" minimum). Once you have a free flowing exhaust you can pulley down and retune. What injectors are you using?

 

Ya I got a set of Doug Thorley ceramic coated long tubes. Now with the injectors I'm a little stumped there. How big of injectors came with the magnacharger kit? Anyone know?

 

i thinky those come with 44?

 

So if thats the case how many psi of boost does a 44 support before those have to be upgraded??

 

on a cammed LQ9?
6-7# is prolly maxing them out.

 

my 8.1L marine injectors are at 63% at 6900 on my LQ4. their about 50 at 5800. so I would say about 7# before you need to start looking for some 60s

 

Yes the stock Maggie 42/44# injectors will be maxed out with your combination if you up the boost, and while you you should look into a larger set they will basically function. However if your looking to get anywhere near the amount of boost you say your after on a 6.0L with the GT2-3 camshaft, you will need to look more towards a 2.9 or even a 2.8-in pulley. Down the road something else that will help is also making the jump to a larger throttle body and also at this higher boost level, just like everyone has already suggested, a meth kit.

 

I guess i figured that a next step down on the pulley size like a 3.0 inch would get me over 400rwhp. So before I do a pulley swap I should look into injectors I spose. Then the other thing is my fuel pump that came with my maggie setup is it gonna handle this all or whens it gonna cave???

 

Here is what I would do, best bang for the buck.

Those injectors are good for about 450rwhp, so I'd drop the pulley to a 2.8, re-tune, have your tuner set the WOT shift points to 5800 rpm and probable about 14* of timing if the motor will take it safely on the fuel you run.

The lower shifting RPM's will stretch your injectors out and let you take advantage of that huge torque curve those blower have. MP112's are big heat pumps so you really don't wanna spin it much faster then that anyway. I think that will get the most out of what you have for the least amount of money and you'll be pretty happy with it.

Next, I'd add a meth kit and a couple degrees of timing.

 

Alrite thanx for the info. One more question is how much can my driveshaft and diff take before it craters?