Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - cam timing
Thread: cam timing
View Single Post
  #16 (permalink)  
Old 09-08-2010, 12:33 PM
Adam65 Adam65 is offline
Registered User
 
Join Date: Feb 2010
Location: Ohio
Posts: 112
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
Straight up timing is defined as when the lobe separation angle and the intake centerline angle are the same. Most racing cams are ground with no advance in them, so if they are installed "dot to dot", that is straight up: a 110 lobe separation cam will be installed at 110 intake centerline. Most aftermarket street cams are ground with 4 degrees advance. If you have a aftermarket street cam with 110 degrees lobe separation angle and put it in dot to dot, your intake centerline will be 106 degrees. You would have to put in a 4 degree bushing and retard it back to 110 degrees intake centerline to be straight up, even though dot to dot is what everyone thinks is automatically straight up timing. It is dependant on how the cam is ground.
Reply With Quote