is 20 vac. normal?

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01-05-2005, 02:25 PM

#11

D16Y8-Z6

3.0 BAR

Join Date: Feb 2004

Posts: 1,558

Re:is 20 vac. normal?

Im at 24 on a 40k block. But its got a spun bearing now.
Idle at 750. Y8 block/Y7 head

Bro's Gsr is 24 also at 750-800.

01-05-2005, 02:36 PM

#12

95civic

1.0 BAR

Join Date: Nov 2003

Posts: 471

Re:is 20 vac. normal?

yep 20 here

01-05-2005, 08:02 PM

#13

TsPek9

0.5 BAR

Join Date: Jun 2004

Posts: 54

Re:is 20 vac. normal?

was at 16 vac 2 days ago and now 21 vac after valve adjustment

01-05-2005, 08:36 PM

#14

turbohf

!! UNCONFIRMED EMAIL !!

Join Date: Dec 2002

Posts: 6,656

Re:is 20 vac. normal?

21-22 at idle, 24 on decel...use to be 20 all the time till i broke a piston...then it started pulling more vaccum? even with new pistons....Autometer gauges are gay (but damn for the price a couple inchs/PSI +/- who cares?) ...

01-05-2005, 09:42 PM

#15

Dr.Boost

3.0 BAR

Join Date: Mar 2003

Posts: 21,479

Re:is 20 vac. normal?

I've heard that aggresive cams give a lower vac reading.

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01-07-2005, 08:43 AM

#16

D16Y8-Z6

3.0 BAR

Join Date: Feb 2004

Posts: 1,558

Re:is 20 vac. normal?

Really ?

Why do you think all the big cam V8 guys get electric vacuum pumps to run power brakes ?

01-07-2005, 02:04 PM

#17

Spenser

3.0 BAR

Join Date: Aug 2003

Posts: 3,930

Re:is 20 vac. normal?

i've got 14 on mine, maybe my valves need an adjustment

01-07-2005, 02:28 PM

#18

Donald125

3.0 BAR

Join Date: May 2003

Posts: 6,279

Re:is 20 vac. normal?

is it just me or it happend to all the autometer boost gauges.
in hot weather the needle always stays BELOW 0 with the engine off
in cold weather the needle always stays ABOVE 0, the colder it is the futher it gets, this few day it sits at like 2 to 3 psi with the engine off. so my idel reads like 17 inches. (but it is still 20 after u do the math :P)