I am planning for this next summer to put some more money into my truck but I am not sure what way to go anymore. I hear so much about the radix and how it is one of the best setups you can get to make the most power. I have a SS Silverado with the following mods Volant intake with ram air, TOG headers, magnaflow exhaust, new spark plug wires, custom tune, and a shift kit. I am hopping to have any where from $3000 - $5000 to spend next summer. I would like to get my truck into the 12’s without using nos! I have thought about a radix, STS or whipple. Also I have thought about putting in a 2600 stall and maybe a cam. How do you guys think I should spend my money?

 

Radix at 9-10 psi, dynotune, and a 3000 stall.

 

Sell your truck and Buy mine your in the 11's Easy and then 10's if you take it to the track !
Kidding I'd say go the turbo route for my money

 

Black Blown hit it about on the head. I would go with the RADIX, converter, and maybe a small cam.

 

I'd sy go with the STS turbo system

 

If you wanna go the cheap route go with Nitrous ( I know you said you didnt want to use it.), tires, and a stall converter and you are there.

Nitrous is extremely fun to use and is less expensive than alot of big power adders. It also can be as safe as a supercharger or turbo.

 

It may be kind of weak to just buy a truck that is already setup like that, but if I could sell my tahoe fast enough and werent in the process of buying a new house, GMC SKI's truck would be parked in my garage.
Back to the topic at hand. I say copy F8L's setup. He is hitting mid 12's with a 5.3 Youd be even faster being as you have a 6.0 and AWD. Of course I wonder with the higher compression of the LQ9 if youd have more problems than those with the 5.3 or LQ4 6.0.

 

I would go with a turbo system, a turbo cam, and a stall, meth injection, and a electronic 2 stage boost controller set for 13 psi. I dont know if the Radix alone will get you in the 12's there is a excellent series from Chevy High Performance, were they took a SS silverado added a Radix, 3.0 pulley, flowmaster exhaust, volant intake and ran a 13.67. I would call combination motorsports, and ask about their turbo truck kit, for 5000 (the same price as the Radix) you get a turbo system, including a air to water intercooler, fuel injectors, fuel pump, everything to make a complete install. Combination also sell turbo cam to suit the turbo as well. I was reading a older thread and Seth, that work at Combination and has a turbo on his ex cab made 446 rwhp at 8psi with just a magnaflo exhaust. A Radix at 8 psi cant touch that.

 

The Radix would have to be spun hard to get him there but it could... The base kit on a stockish SS is good for about 98mph. Put a mild stall and a small shot of nitrous or turn up the boost and you could have 12s... Hank on SilveradoSS.com runs a Radix and a 50shot and runs 12.4@108mph. You might want to check out his setup.

My combo would get you there EASY considering you already have the 6.0L and start off a full second faster than me. You can just do an intercooler or the meth and be just fine. I plan on making much more power than I am rigth now so I opted for both forms of cooling for when I upgrade.

The cheapest route has already been mentioned with nitrous but refilling the bottle is a pain in the *** IMO.

 

nitrous, nitrous, nitrous!!!