ROSHX7

How much VACUUM do you guys have at IDLE on your TIIs? I am worried mine is too low. Right now, at 800rpm I get 11. Is that the right amount? Also is it possible NOT TO SHOW A VACUUM LEAK AT IDLE, but it can HAPPEN under driving acceleration?

HAILERS

14 in/hg at 750rpm on a 87turboii. My 87na gets 16 in/hg at 750. Always puzzled me, the difference. Lower compression ratio on the turbo make a difference? Don't wanna hear anything about it being a worn out engine. Its possible to have a vac leak that is not detectable using normal methods. The egr diaphram could be ruptured internally and causing a vac leak and so could the switching diaphram in the acv(be busted and leaking causing a vac leak).

1FastT2

iTrader: (1)

I have about 11 but im kinda thinking my engines about to take a ****.

C. Ludwig

iTrader: (27)

My 90NA pulled 15 @ idle.

Chris

turborotor

iTrader: (1)

17-18 inches,
depeding how rich or lean i make the mixture, also how much timing advance I give it. I have a haltech which lets me do that. I also have a brand new rebuilt.
C

Gene

iTrader: (1)

My T2 does about 13 at idle I think (and it idles a little low, about 700)

I think the reason vacuum is less on a T2 is because the turbo is spinning just a little bit, and lessening the vacuum effect. or something

Brian P

I get between 15~17" depending on if the car is warm or not.

Geoffman72

16-18 @ 750rpm on 87 TII with 90k on original engine with leak between upper and lower intake

Scott 89t2

should be between 15 and 20. if it's lower then 15 you either have a vac leak or your engines almost dead.