hi guys... i already have my radix installed and i am running fine, but i really need some more power other than that. its a 04 denali totally stock except for that radix.i was thinking about a 408 maybe. tell me what can i do to reach the 700 rwhp range. i dont have any dyno sheets but i think its about 380 rwhp. thanxx guys

 

Well from what I have read on this forum, you should have gone with a large front mount turbo if you want 700 rwhp. The Radix unit (from what I have read) is good for upwards around 500+ rwhp, but with that said the mods that I have heard of are: Long tube headers, high flow cats, larger pipes and a flow through muffler, 90mm j tube conversion, 90 mm throttle body, smaller pully, and of course custom tune.

 

i was thinking of some heads and a cam if that was possible. if i could do that what combo do you suggest me to go with and does need a different tune than the one that was provided by magnacharger. Oh by the way... how much diffrence will it make?

 

To my knowledge, the MP112 will not flow enough air for 700rwhp no matter the cubes. It is all a matter of airflow. 600rwhp has been obtained on a 408 I do believe. Sounds like you may be a good candidate of the 122 upgrade when it comes available, and a 90mm tb.

 

the easiest way right now to see 700rwhp would be the livernois kit with a gts76 turbo. you have to really think ahead if your talking that kind of power. you will need a built motor and a 4l80e swap. probably more of a fuel system than comes with that kit and custom tuning for sure.

if i had a radix i think my first upgrade would be a good meth kit and more boost but there are lots of ways to get more power out of what you have now. heads and cam would help for sure. you can prety much count on some custom tuning if you stray much from the stock radix set up.

 

if you can give me more info. on which heads and cam should i go with. by the way i have no idea what is a meth i always read your posts talking about it but never got the idea of it..