Thread: boost gauge problems

so i installed the boost gauge on my 04 grind prix gtp and im gettin vaccume but when i floor it i hear my supercharger winnin but my boost gauge aint showin no boost i think i hooked it to the wrong place i hooked it up to what looks lk a vac source or something its on top the s/c

yea, you connected it to the wrong line.

Connect it to the line going around the LIM and supercharger. that line will show boost

Whats a LIM

lower intake manifold.

look under the snout of the supercharger, there will be a vacuum T there, follow it and find a spot where you can T into that line.

yep..pretty much T into the line right behind your alternator.

ok ill go take a look right now brb

Right around here......

Originally Posted by KeithGTP03

Right around here......

do you pull the vacumn line out of the MAP sensor or do you pull one of the lines off the T thats under the s/c snout

i went to look its like a hard plastic line right ?

correct.

ok so how to i T into that little ass line ?

Originally Posted by 04PrixGTP

ok so how to i T into that little ass line ?

take the L nipple off your MAP sensor (it will be the final place the vacuum line goes at the rear of the supercharger), replace it with a T, and continue the line to the cabin of the car.

yea i just hooked it up im runnin 6 psi is that normal for stock ?

Sounds about right for stock.

if i get a 3.2in pully how much boost would i get then or is there something esle i can do to get more boost

Do you have other mods done before you just slap on a pully??? better have a good amount for that size.


EDIT!!! On a 04!!! thats like dropping to a 3.0 on the 97-03 that would be insane without a ton of mods!!! plus a way to scan for that knock

yea i got wires intake and exhaust system

your going to need a tune for sure

yea im tryin to find a good tunning place around here no luck so far

You are going to need more like headers, intercooler/ cam, and a really good tune for that pulley