Looking at pulleys and see there are aluminum ones out there. Just wondering if there are any issues between them.

 

Billet aluminum has a lighter rotating mass. It also does noot corrode and rust like some of the steel pulleys do. I have to repaint my Lingenfleter pulley every year. The Nelson billet pulley I used to have always looked great and it had a jam nut to help withj install/removal.

 

Thanks,
I just got one from Pulley Boy's. I was not expecting aluminum or the blue color but I'll run it.
I like the integrated hex for holding back.

 

What size are you going with?

 

From a 3.5 to a 3.4. Should be a big change being the 3.5 is with a Superchips tune and the 3.4 will be with a dyno tune. You think?
The tune is on for tonight! The current dyno tune is pictured below.

 

What were you hoping to gain with a .1" smaller pulley and a tune?

 

According to Magnuson and other experienced folk a 10th in pulley size equals a 1 pound of boost and 15-20 HP.
But other than that the original tune is a (2005) Superchips hand held generic tune configured to be easy on a stock transmission.
Now that the blower and truck are out of warranty and I have a new built up transmission there are gains to be had left on the table.

A Dyno tune over the handheld and the pulley should bring out a nice little gain. I hope.

I'll post it up, the tune is tonight.

 

****, im going from a 3.4 to a 2.9-3.0...hehehehe

 

I would at least drop to a 3.0 that will still be manageable. You paying for the tune now. Dont regret not going bigger later. 3.0 should make 10.5-11 psi on the L33

 

I agree, at least do a 3.2 or 3.0 to get your money's worth.