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.

Re:is 20 vac. normal?
 

yep 20 here

Re:is 20 vac. normal?
 

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

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?) ...

Re:is 20 vac. normal?
 

I've heard that aggresive cams give a lower vac reading. ???
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Re:is 20 vac. normal?
 

Really ?

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

Re:is 20 vac. normal?
 

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

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)

Re:is 20 vac. normal?
 

I'm not a "big cam V8 guy" so I don;t know. :P
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

Re:is 20 vac. normal?
 

Haha.

Well if you were.. lol

Yea anyway. When I get my 272 cam for my y7 head ill let you all know the difference.