sschmid

I have recently installed a D1SC kit on my 02 SS. It came with the typical 4" pulley. I was only getting about 3 lbs boost, so I went to a 3.6". Now I am getting a little over 5. I live at 4500 feet, so you can expect lower boost numbers than at sea level. I am curious if my vacuum source is good enough and if the bypass valve is opening all the way? Where is the best source to pull the vacuum? I am currently pulling it off the line to the brake booster... Any help would be greatly appreciated...

anarchy99

iTrader: (7)

Ihokked my boost gauge up to the brake booster also. Works great!!!

kp

iTrader: (34)

Brake booster works fine, your boost seems a little low but it depends on whats done to the motor and you are at pretty high elevation..

sschmid

Good to know, I will leave it running off the brake booster line... I agree about the low boost numbers, I am hoping it is elevation... The motor is stock, just lt's, injectors, fuel pump...

kp

iTrader: (34)

Its probbaly about right with headers and your elevation, you can drop to a 3.4 but belt slippage starts to come into play. Also depends how high you turn it, I always ran my stock motor ATI car to 64-6500 rpm so you see a little more up there.

WAHUSKER

iTrader: (4)

Can you still use the brake booster hose if you have a vacuum modulator hooked up to it already?

Ferocity02

iTrader: (60)

Brake booster here too.

FYI... I am making only 4.75psi with a 3.6 pulley, at sea level....