I have an 04 gibbs with the radix and 5 speed. I did a quick search and didn't find to much. My question is what cam do you reccomend for my 4.8? I have a 2.8 pulley on the radix with a CAI and headers. At the dyno I put down 379hp and 420tq but my peak torque is at 1870rpm and the max hp is at 4800. I would like the torque to move up a little bacause it is giving my traction issues off the line, even with the et streets. I am hoping to spend a max of $500 but if there is a better cam I can go higher.

 

just a real quick search of "cam radix" I found quite a few threads. The only thing I don't know about you is the 4.8. Most who swear by the GT2-3 Lingenfelter's are 5.3's. Have you read the truck cam thread yet. Sorry not to helpful, just waaaaay too much info out there. I personally think you'd be fine and really happy with the GT2-3 Lingenfelter. Goto their website and get the springs and cam package. It's like 400 bucks.

 

Yea there are a few threds out there but I don't know really to much about cams so all the info I see there isn't really that helpful. I don't understand what makes a cam better than others, or what makes it good for a supercharged application. I am a newbie to cams, I know how to change them and pretty much anything else. Just don't know what i'm looking for.

 

yeh, I feel ya. Sorta the same here with cam's. I understand them enough, but no where near enough. My opinion, if you are gonna mod your truck past an "out of the box" blower, do some research. Learn your new hobby. Google the **** out of how stuff works. Hell just throwing a blower on there is enough to motivate to learn more. There are some good threads on here about the pros and cons of blower cams specs. But I believe the general consensus is the GT2-3 is a good stick. LOL Welcome to the world of more traction problems with each mod.

Your first lesson on cams...don't pay 500 bucks for one.

 

I was planning on $500 for cam, pushrods, and springs. I know how a cam works and what it does but I don't get lobe seperation and stuff like that. I have built several older engines but the ls style engine is completely new to me, and I never have understood cam numbers. How does that GT2-3 cam idle?

 

It idles smooth as glass on a 5.3.

Typically a cam for a supercharged application is a striaght split since less intake duration is needed to fill the cylinders due to the super charger, and it has a wide LSA to limit overlap so that boost is not bled off.

 

What do you want to rev to in the 4.8?
A reverse split seems to be the most common advice. And a wide lobe seperation angle (LSA)

Read this....

https://www.performancetrucks.net/fo...d.php?t=366243

 

Do not put a reverse split cam in a blower motor.
You will have high-temp problems.
If you boost the engine with 7 pounds, you are filling the cylinder with 1.5 times the amount of air that the engine would see without the blower.
The blower helps air get into the cyl, but it doesn't help it get out. The piston is responsible for that, and if you cut down the degrees the exhaust valve is open, you will increase the pressure working against the piston and increase the temps in the cyl.

If you give me the stroke and RPM you want to make peak power at, I can tell you what cam you need.

 

So after reading around a bit I found out lope is bad for a blower motor and I need a wide LSA.

I don't know what the stroke is it's just a stock 4.8. I just want to moves the torque up some so it's more useable, Somewhere around 2500- 3200 is what I would guess.

 

Reverse split is one with more intake than exhaust.
Camking is right the GT2-3 from Lingenfelter and the GT-7 for that matter are forward split cams and are recommended for supercharged applications. Specifically radix.