How many of you guys actually see 19psi? I've had mine on for like a month now and I don't think I've ever seen it go over 16psi. I don't care what the temperature/humidity is there shouldn't be a 3psi difference. Just curious. I think it may just be my Stewart Warner boost gauge.

 

I see 19psi or higher. It may be the boost gauge or the almighty belt slip. You running the Stage 2 belt? I think I am going to order the Stage 2 belt with my next paycheck and run that in conjunction with my oversized tensioner.

 

Nope I just put on a brand new OEM belt and have the 3" tensioner pulley also. No way that could be it. But do you really think so? I was seeing the same boost with my 2.8" pulley.

 

I have my original belt on with the 3" tightener but mine may be slipping. I don't do much highway driving but I may take it out today at lunch and make sure its not slipping because right now it feels like it may be. Was it the same gauge you were seeing the boost with 2.8"? Or have you put in a different boost gauge?

 

I'm running a 2.6 and peak at 20.6 psi according to the data logging software... I"m at 19 from @4500 up.

 

I see 21.5psi depending on what gear I am in...3rd i see it, 4th I see about 19.6

 

Are you guys seeing ~20psi using a boost/vac gauge or the interceptor gauge?

 

Yeah. Exact same gauge. Exact same boost.

 

seeing 20-21 but I have zzp adj tensioner and gmpp stg 2 belt

 

Interceptor Gauge

 

Remember you have to really give in second, then 3rd and you will see your max boost. Going WOT in fourth won't be nearly as close as if you pounded it in 2nd and worked your way up.

 

Yeah dude, but peak I have ever seen is like 16 psi. It's usually around 15 or so. IT actually hit 17 today uphill in third.

 

If I just jam it in fourth I get 90kpa (14psi i think?) and If I stretch her legs I get 105kpa. (almost 16psi) With a 2.8 I should be able to peak 17psi easy.

 

I see 18.4 with the interceptor and I have a 2.7" pulley.

 

20-21 with stock gauge. Will be installing the Interceptor gauge today.

 

i run a lot hptuners seems to have a glitch where it doesnt record above 17psi..unless my 2.5 is really running that...idk

 

Iam seeing 19lbs with a 2.7

 

Be a Man go with the 2.4" pulley lol.

Pulley Boys makes the 2.4" if anyone cared.

 

give me the money to switch to a PB hub and ill do it

 

Im sure this has been asked before but ive been away from the board for a long time...I just got stage 2 (gm) today. My car is a whole different beast its insane...anyways...can the gm pulley that came with the kit be changed out with something else or do you have to leave it as it is?

 

http://www.pulleyboys.com/lsj28.html

 

i see 19 from 4500rpm then peak at around 20 with my 2.6"

 

I ONLY see 16 psi too. I have mods listed below w/stock belt.

 

BEFORE my CAI, I'd see 19.5 psi with my 2.5" pulley. That is via Aeroforce.

 

I need an exhaust I hit 21 with a 2.6 (on my log with hp tuners) pin the gauge out at 4500 rpm.... come on head gasket don't fail me now.