Posted by Kaegi [108.162.245.235] on Saturday, May 13, 2017 at 22:07:05 :
In Reply to: vacuum question posted by John R [172.68.54.67] on Saturday, May 13, 2017 at 14:30:04 :
no they don't affect performance. its a very small draw. I had a hot rod with a 409 and a TH400 auto in a 53 Chieftain and I had to turn the wipers off so the vacuum modulator could let it shift gears.