how much boost should my gauge be reading with this pulley right now i see anything from 16.5-17.0 @78 degrees

 

You should only be seeing around 15-16, I believe. Regardless, it should not be 17 lbs.

 

yeah thats what everyone is saying maybe my gauge is off. but it sits at 0 when the car is off

and after the install of my intercooler i actually saw another lb. is this possiablee

 

my 2.9 hits at 15lbs

 

Well, the intercooler on the LSJ, is a liquid one as you know, so the only way it might help give you more boost is if it was dropping the temp a significant amount to actually help make a denser charge. Since it is only liquid to air, it probably isnt doing this, especially not enough to see another 1-2 lbs of boost.

 

that dosen't sound right

well maybe its just off then how can i check that

 

Sounds like your catalytic converter is starting to get clogged.

 

don't have one

 

i hit 16lbs on my 3.0 pulley

 

You could check using a mechanical gauge, but, that will mess with you more, mostly because it WILL read lower numbers than the stock digital one, about 1-2 lbs. So, you would think again that the stock one is off.

The Interceptor will show you the same as what that stock one is showing. The only way it wouldn't is if the gauge itself was broken or not calibrated, which is unlikely.

 

so maybe its possiable when its colder out that a denser charge could add a half pound or so, so maybe my guage isn't off

well i may get an interceptor where the cheapest place

 

78* is not cool by any means. Your gauge is off most likely

 

i'll get on it on may home and find out exactly what i max out at

 

ottperformance.com for the interceptor

 

When I said colder, I mean, in the low 40*s. Lol, 78 is a good temperature, but not one to cause added boost.

 

My 2.9 hit 16psi during tuning

 

With a 3.0 and full 3In exhaust i used to see around 14-14.5

 

mine was 12

oh wait. the monkies are still on stock cams

carry on

 

i heard 2.9 on 42 lbers you actually lose some power...some one on here did a test with different pulley sizes ran the most power with the biggest pulley on gm stage tune

 

no your iat2's rocket after 3rd gear and u trap a lower speed and worse time consideably different just by looking at ur 1/8 and 1/4 my 1/8 and 1/4 were 9.2 and 14.1 @101 now with the 2.9 they are 9.2 and 14.2 @99i had regular 3.06 pulley then swapped to 2.9 but i will swap back to 3.0 practically stg 3 pulley.

 

3.0 pulley with header and 3in down pipe with no cat i ran 15psi before a tune (way lean), but after u get tuned it just depends on who tunes ur car, after my tune I am running 13 and 14 max because my duty cycle is at 91% so the tuner turned my boosted down until I get bigger injectors.

 

were they 42 ib injectors?

i mean either way this thing is still fast i just wanted to know if my gauge was wrong or something

 

it also depends on your supporting mods. open things up and youll see less boost... ive got a ported blower and a huge intake so i will see less boost when i get on it... when it was stock i saw 15psi on my 3inch

 

my 3.0 ive seen 16...

 

me you and OP must be freaks...lol