Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Pinging on cruise part throttle acceleration?
View Single Post
  #29 (permalink)  
Old 07-13-2010, 09:59 AM
Custom10's Avatar
Custom10 Custom10 is offline
my KARMA ran over my DOGMA

Last journal entry: SS
Last photo:
Join Date: May 2009
Location: Saskatchewan, Canada
Age: 51
Posts: 1,128
Wiki Edits: 0

Thanks: 23
Thanked 43 Times in 38 Posts
Originally Posted by kyle86
What? That's my manifold vacuum reading at cruse rpm. What's wrong with that?
The cruise RPM he listed was low about 2300 if I remember, now every engine will have its own characteristics but at that RPM with the cam he is running 20" does seem high. From my experience with my 383 and a 221 duration cam at 50 thou (less duration than his) I am pulling only about 14-15" at that RPM at a steady state cruise, the only time I come to 20" is if I am off the pedal and the gearing is causing the truck to decelerate but I have an 1405eddy and am on manifold vacuum. That is why I asked about checking his vac gage to be sure it was accurate. If the gage is off then it will hamper his tuning setup.
Reply With Quote