nasty_ss

so i've been able to get the turbo on my car, and having a little bit of a vacuum issue. since it re-hooked up the vacuum gauge it's only pulling 3-4psi vacuum under idle. with the old turbo it would pull about 20psi vacuum at idle.

I have the gauge tapped in vacuum source at the map sensor line. it also is t-d to my BOV.

i've been told it might have to do with my camshaft. i'm using speedinc's TU2

Cam Duration Lift LSA
int. exh. int. exh.
TU2 236 236 .587 .587 112.5
it's on a 6.0 with wiseco -25cc pistons

looking for any advice or suggestions

nasty_ss

started looking for leaks today and didn't find anything. any input would be appreciated

madmax4499

iTrader: (3)

i have the TU-3 and get 12 vac at idle.

how does your car run? pinch off the hose before it gets to the map, bov and see if it improves.

nasty_ss

what's your compression ratio if you don't mind my asking?

madmax4499

iTrader: (3)

9.3 to 1

nasty_ss

mines supposed to be just under 8.5

rotary1307cc

iTrader: (5)

You are confused

Are you talking psi or Hg?

Big difference (two fold) most talk about vac in mm Hg not psi

rotary1307cc

iTrader: (5)

I have a 232/242 113 on a 10:1 370 and get 10-11 Hg at a 900rpm idle

nasty_ss

ran it today and it hit 8 and sorry it's def in/Hg

Ryan K

iTrader: (11)

Put the BOV on a separate line from the MAP sensor & gage.