hotwheelsrs1

i just hooked up my boost gauge, its an autometer phantom 30in. hg. to 15psi, first off im running the trd s/c, and when at idle my gauge is registering 20in. hg. the most i hit was like 5 psi at like 5000 rpm, and im running the nst 9.5lb. pulley, is this normal or whats up? i thought at idle it should read almost 0, please help. all info is appreciated.

DK01

At idle 20in. hg is normal because you're in vaccum but if your registering 5 psi with that pulley then you might have a boost leak somewhere. Where are you tapping the boost gauge line into?

hotwheelsrs1

well theres a diy someone did on here and he put it right at the end of that line that goes into that sensor thing gosh i dont know exactly what its called

Scotty

wen i installed my boost gauge i wasnt reading anything i rechecked everything and the vaccum hose had a kink in it which was causing the gauge to be wack!!...maybe that could be something to check into

hotwheelsrs1

no theres no kinks, i already when back and checked everyhting again

DK01

Are you running any type of intercooler system with your s/c?

DK01

Also did you zip tie the end of the hoses that connect to the t-fittings to make sure you are not leaking boost from the hoses? Just make sure you don't zip tie them too tight to crush the t-fittings.

hotwheelsrs1

no im not.

hotwheelsrs1

do you think it could be because im running the stock bpv?

DK01

That idk.. I run a turbo kit so maybe someone with a s/c can help with that question.

hotwheelsrs1

thats cool well thanks for they try.

hotwheelsrs1

anyone else got some kind of input?

06scionsc

I would suggest changing out the bpv. That is more than likely your issue. The stock bpv is known for leaking boost. When brand new they only allow 5psi of boost. Even though you added the new pulley it's still only going to allow 5psi. It will bleed out the other 4.5. Keep in mind you will only see the 9.5 at redline. Most of the time all you will see is 5psi when driving.

hotwheelsrs1

really? so changing out the bpv should make a pretty big difference then? which bpv would u recomend?

zucc

i have a s/c and and autometer boost guage and i run around 5-6 every time are you sure ur letin it rev high enough to get peak boost?

hotwheelsrs1

yeah i ran it to 5500 rpm

zucc

oh idk maybe it is the BPV cuz im leaking 1-2 lbs, but leaking that much idk about that.

hotwheelsrs1

yeah i dunno either, but its all i can think of so far.

zucc

did u check the line to ur boost guage maybe its not on all the way, idk it would have 2 be a leak in the line you ran through ur firewall from the vaccum line or the PBV so but that would be a bit of a pain 2 check the line, i ran mine like right above the shifter u can see a vid of mine at my cardomain in my sig

hotwheelsrs1

im not sure what line ur talking about, my gauge has an electric sending unit, there is no line going to my gauge. i dont understand what u mean.