I have a 2.6 Inch pulley installed.

The ZZP adjustable tensioner comes with 3 possible settings.

Hole 1# stock to 3.0 Inch
Hole 2# 3.0 Inch - 2.6 Inch
Hole 3# 2.5 Inch

Right now I have it on Hole#2 and am getting 14 PSI before 4000rpm and about 15.5 PSI at redline. Weather here is 20 degree's this morning.
Elevation here is: 381 ft / 116 m above sea level.
My boost levels stock used to be about 11 PSI at redline and 14.5 PSI with a 3 Inch pulley to redline.

My question is: Are my low boost levels a result of weather, elevation here in (Ottawa, Ontario) or does it sound like my belt is slipping? Which if the case I will put it on Hole#3.

 

do you have anytuning done? or boost bypass mod? also keep it on level 2 and pick up a gm stg II belt... they're cheap and with that I have no belt slip whatsoever.

 

Are you saying that my belt is slipping?

I have a MAFT right now with Setting (C1) and I see no knock and my Injector pulse Width is Only about 16ms at 6000rpm on my interceptor.
So all is good tuning wise for now, until I get my car tuned at "NEW ERA PERFORMANCE" at the end of september.

If my belt is slipping, I was thinking of just using Hole#3, because my pulley is a 2.6 Inch its very close to the 2.5 Inch setting.

 

Well your stock ecu will only let you get 12.5 psi, with a smaller pulley it will let you get up to @15 but will bleed off after 6k,, do the boost bypass mod and youll see @18 psi, but the maf-t is only good to a 2.8 pulley, I would suggest putting back on the 3" til you get a tune. at least thats what intense told me (about maf-t)

 

belt might be slipping mine started to stretch after I put on the adj tensioner. but Its def your boost bypass on the low boost... do the mod.

 

O.k thanks bro I will try the boost bypass mod.

 

you got it man... should see a nice increase in psi.