If you have access to a milling machine you can groove your pulleys to help with the slip. I did it to one of mine and went from 8 lbs to 12 lbs with no other changes. Here is the website I got the idea from. http://www.reichardracing.com/ultra_grip_pulley.php

 

NORCAL TBSS ..... I run 275/45/R17 MT ET STREET Drag Radials on the factory Z71 rims at the track (Looks Funny) and 305/40/R22 on the street. I travel alot on the highway and I dont want to lose alot of gas milage. I heard 3.42 to 3.73 was worthless but is 3.90 worth the swap. 4.10 I heard eats 2-3mpg more.

 

If 4.10's eat 2-3 mpg then 3.90's will too. No free lunch - go 4.10's or keep your 3.42's.

 

suburban I will get my small pulley milled this week and try it out that would be great because i dont feel like spending a thousand bucks on a 8 rib set up or 6 hundred on a bigger crank pulley.

 

How do you like the sound with that intercooler - takes a while to get used to eh!

 

jamesbond I made my inercooler from your design and pat help me through the way I see you are from Canada I am to i live in toronto. the inercooler sounds great but i dont hear it much when i open it up My exhaust sounds like a dragster custom 3 inch dual high flow cats and solo performance mufflers. are you running an 8 rib set up to get 12 pounds i was getting 10-11 before the inercooler went in so i bought a 2.5 pulley and it slips so i bought a new gates tensioner and have not tried it but i am going to mill the 2.5 pulley like suburban said and try it out, any way i would love to see your truck maybe we can meet up some time pm me and i will give you my number. my name is Mike and live near the 400 and 401

 

well I got it done milled the pulley put it on and ran a 2 inch shorter belt have not opened it up yet but looks very tight all nos is in place just waiting for some dyno time and my tuner.

 

At 12 lbs Im beginning to slip at 5500 rpm. I even went to a smaller idler pulley to increase the belt wrap. Ive looked at every option to avoid an 8 rib setup buts it's becoming reality now that I have morepower on tap from the intake changes. Might start off with an 8 inch crank pulley and try to do something to increase belt wrap or mill out a pulley similar to your picture above. Good luck and I sent you a PM.

 

Wow, 12psi on 42lb. injectors, on a 6.0 with a 2.8L KB Big-Bore? You must be maxed out. What kind of power are you putting down?

 

my wifes stone stock tahoe on 5 psi with a tvs 1900 on the 22s. not super fast, but its cool for what it is. full weight, 3rd row seat, 3 car seats, and the stroller...lol... waiting for the tranny to go.....