Comp Cams Stage II Xtreme Energy XE270AH Camshafts Question
10-29-2010, 06:17 PM
#41
4th Gear Member
Join Date: Apr 2008
Location: Nebraska
Posts: 1,546
10-29-2010, 06:37 PM
#43
3rd Gear Member
Join Date: Jan 2009
Location: Florida
Posts: 570
Cam lift doesn't have anything to do with PTV on these motors. PTV happens around 5-10 degrees after TDC on the intake valve and the cam lift is in the 0.1-0.3" lift range then depending on duration and install centerline.
These 2V PTV on the flat outer edge of the piston as the intake valve is so close to the bore, dish size doesn't affect PTV either. You can see the notch needed for a large duration 2V cam below in this Chicago style deep dish piston and how far it is into the flat region:
These 2V PTV on the flat outer edge of the piston as the intake valve is so close to the bore, dish size doesn't affect PTV either. You can see the notch needed for a large duration 2V cam below in this Chicago style deep dish piston and how far it is into the flat region:
10-29-2010, 06:56 PM
#46
Mustang Nazi
Join Date: Sep 2004
Location: Texas, baby
Posts: 13,444
Sa'll good Jim and Nick!!!! And Jim you will always have my respect for all of your help with the Silver Bucket. We also appreciate you and Nick being here for solid info to assist our members with their builds!!!!!!!!
God knows both of you have forgotten more than I will ever learn when it comes to the technical aspects! I just have my experience from doing what has worked for me. THANK YOU both for your input!
Mitch
