I was blowin off belts with my 2.8 pulley. I got the upgraded tensioner and no problems since and no slipping or squeeking. I also got two of the 100mm metco pulleys. i think you are gonna run that little 112 out of air.

 

im gonna give it a try hopfully it works well

 

I have the upgraded tensioner and twin metco 100's on the 3.1 and I can get some belt squeak. I'll see what the 2.8 does. Another big concern with the 2.8 and especially your 2.6 is iats. You are really going to turn the mp112 into a heat pump.

 

where can u find an upgraded tensioner?

 

you can try a reichard racing pulley they claim it eliminates belt slip i got one for my vortech

 

if i add meth would it help alot with iats or is that pulley just too much should i down grade to a 2.8 or 7