Posted by Chris Case [108.225.237.33] on Saturday, April 04, 2015 at 18:58:11 :
In Reply to: "Normal" Vacuum Readings for a 230? posted by CSCameron [75.171.82.229] on Saturday, April 04, 2015 at 18:20:30 :
I wouldn't put to much faith in their accuracy.
That said, an idle of about 15 , then actually increasing as revs come up a bit. Big lumpy cam maybe down to 11-12. And what they are best for is engine condition- a wavering needle means valve not good, misfires, etc.