Originally Posted by Dcuda69
Originally Posted by Moparmaniacc
You are right, Holley says you should have a little bit of transfer slot showing at idle. So for all you guys out there with a mild or stock cam, how much vacuum are you pulling at idle? thanks


470" low deck,10.2:1, Comp XR280R (242/248@.050)solid roller pulls 10-12" and idles nicely at 900 rpm with a Holley 800 DP that's essentially untouched.


Pretty sure that cam isn't "mild or stock".

My 51 pulls 20" at idle, bone stock. But's it's a flathead six and just about as relevant.