cobra w/ vortech blower - how much vacuum at idle ?

jimg92373 · 02-26-2008

Have a 98 cobra . has a vortech supercharger . I was wondering if anyone else is running this setup , or have a good idea of how much vacuum the boost gauge should read at idle

RedSnake · 02-26-2008

I'm not really sure on that, but I would bet that you should not register any boost on the guage unless you are getting down on it. Let me know.

gandara · 02-27-2008

I have the vortech blower and I see about 2-3 lbs at idle, and it also depends on what SIZE pulley you have on it(tuned obviously).

gandara · 02-28-2008

Quote:

Originally Posted by gandara

I have the vortech blower and I see about 2-3 lbs at idle, and it also depends on what SIZE pulley you have on it(tuned obviously).

Correction, checked my gauge when I left work and yeah I don't see anything over 1lb @ idle.

jimg92373 · 02-28-2008

1 lb of boost ? i read between 10-15 psi vacuum at idle ?
are you using the pully that came with the vortech kit ?

im using the v-2 sq blower

gandara · 03-01-2008

Quote:

Originally Posted by jimg92373

1 lb of boost ? i read between 10-15 psi vacuum at idle ?
are you using the pully that came with the vortech kit ?

im using the v-2 sq blower

Oh you asked for vacc. Sorry I was on the wrong page here.

Do you have the stock vortech pulley? What numbers did you put out on your last dyno?