LS1AC-Cobra

so far I'm almost done with my SC install and all that goes with it, after firing it up I realised that I'm not making any Boost. If I remove the tube from the SC to the TB I can feel it blowing pretty strong.
Its a Paxton Novi2000
I have a 6.8 Balancer and a 2.75 pulley so Impeller Speed at 6200rpm should be 53650 (6.8:2.75x6200x3.5)
Paxton says max. Impeller speed is 55000 so I'm already close to the max.
I also Installed a LS6 Intake and a CompCams Xr269 with 1.8 rockers
could it be that the Intake is leaking somewhere, or is the cam not good for use with a SC, but I think its a pretty mild cam.
what could cause the problem?

hellbents10

iTrader: (10)

No boost when its idling? If so that is good.

You should see vacuum when there is no load on the engine.

LS1AC-Cobra

at idle I have Vacuum -18 at 2000, 3000 and 4000 I have Vacuum of -20

ls1290

iTrader: (20)

Is the gauge installed correctly? At 4000 RPMs there should be way less vacuum even with a NA motor.

LS1AC-Cobra

the gauge is connected in the rear of the intake just underneath the MAP-Sensor

LS1AC-Cobra

btw, I was not driving the car when I checked the vacuum
when there's load on the engine I think then its way less

Johnv

It's unlikely you will make much if any boost just free reving, engine needs load.

'Trust'

iTrader: (24)

You won't hardly make any boost in Park/Neutral, you need to get it out on the street.

LS1AC-Cobra

ok guys, I'll try and get the rest of the things sorted out and then I take her out for a spin, lets see what happens....