Who is using these in a strickly towing application, or in cold evironments, on a 2004 6.0 L GMC 2500 HD 4wd? How is your fuel milage when towing and has there been any issues with the unit itself or reliabilty with the vehicle drivetrain. I need more torque for towing and a diesel is not the answer for me. Thanks to all who reply.

 

I have been running my Radix for 90,000 miles and the only problem I had was with the original boost-a-pump that was installed, but the new systems have a separate inline fuel pump rather than the boost-a-pump. My intercooler pump is out right now too, but I think that may have something to do with the fact that I ran the truck for quite awhile with the intercooler system empty without knowing it. I'm sure that did some damage to the pump.

Anyway, I tow a 6000 lb trailer fairly regularly during the summer (110-115*) with my truck, and it makes a huge difference. I have also towed the trailer with a stock 2000 Suburban and there is loads of difference between the two. It frustrates me to drive the stock truck after being used to the Radix torque. If you have looked at a dyno chart for just about any Radix application, you will see the torque spike somewhere around 2500 rpm and its flat until you get up into the 4000+ range before it starts to tail off. If you are looking for low-end grunt, the Radix is definitely the way to go IMO. The only issue that a lot of people run into with the drivetrain is the tranny, but I believe you have the 4L80E in your truck, which is a much stronger unit than the 4L60E in the 1/2 ton trucks. A shift kit and servo would make the 4L80E essentially bullet proof unless you get up into the nasty-high power numbers.

The Radix will love cold weather much more than warm, so I wouldn't worry about any cold weather issues. As for gas mileage, mine sucks when towing, but I have a heavy foot and it sucked before I put the blower on as well.

 

There will not be any issues with towing in any climate with the Radix supercharger system. I towed a 13K trailer accross the country all summer two summers in a row, totaling 30k miles on the truck after the last trip. Only thing that needed to be done to the truck was change the oil (and I forgot that once).

If you are planning on doing alot of towing, I would highly suggest the towing packaged that magnuson provides.

 

Hey Brian,
Just courious what is the towing package?

 

5 psi insted of 7.

 

Well Thats no fun