For you guys running a 2.60" upper (especially for the Eaton), I am wondering about a few things:

1) Are you gettting or have you ever had any belt slip with the 2.6? Is it a non-slip type pulley? Do you have the additional idler pulley installed?

2) How much boost over stock size upper pulley did you see with the addition of this 2.60? What lower pulley are you running with it?

3) How much did you grind off the Eaton to get it to fit... any pics?

Thanks for any info.

 

why not just go with a larger lower? less belt slip, and fitment issues

 

all i want is 4lbs over stock. what i need is a setup that allows me to switch very quickly back and forth from stock (or close to) to 4lbs, quick and often. i'm thinking the upper would give me the most flexibility and quickest changes, an interchangeable upper that is. but if the 2.60 is a real pain, then i may just throw on a 2lb lower and go with larger uppers. there are a couple different routes i can go, just trying to decide which is best. with an interchangeable lower setup only I can't get a stock boost config.

 

why do you need to switch it so often?

 

dragstrip friday nights (my hobby), horse shows saturday morning (wife's hobby). lot of interstate towing thru Blue Ridge Mtns.... looking to go quickly between +4lbs boost to +2lbs or maybe even +0 lbs boost. trying to keep everything from heating up so bad on the long haul. thanks

 

aha! you may look into getting a 2 lb. lower, and a quick change upper pulley system. and 2 tunes as well. performance/street, and towing.

 

I have a 2.6 upper on my truck with the stock lower and an Eaton. It's not the interchangeable type like you can get from SFPH. I have never had a problem with belt slipage even before I got a Metco Idler kit last month.....I got it for "looks". According to "Rob" the 2.6 is a 4# pulley but I couldn't tell you how much boost I'm actually getting with the stock guage. I do know that it pegs the guage though and performs well enough. No dyno! Or, racing here either so I can't give you any numbers.

 

how about just bypassing the whole belt system, turbo the L, and get a boost controller? I think thats the most simple and obvious solution

 

hope this helps..

I have a 2.6 upper from JLP. No grinding necessary.
With it, and a 4 pound lower, I see 16 pounds of boost on my autometer electronic boost gauge.

However, it is a total pain in the a s s to get an upper pulley on and off, unless you go with the interchangleable type.

Good luck.