Measuring lift and duration of stock and perf cams - Page 2 - ZR-1 Net Registry Forums

Ccmano · 03-01-2021

Pete · 03-01-2021

Just a few questions.
1.What is best phasing of these cams for best performance?

2.Do you have before n after dyno #'s on these or previous cams?

3.How did you find out the specs of your previous cams?

Pete

efnfast · 03-01-2021

Quote:

Originally Posted by grahambehan

Lee, the flat area needs to be larger than the tip of your indicator, at least equivalent to the dia of the wear marks on a used lifter, for you to measure duration accurately.

Graham

That makes perfect sense. Where Lee's tool is falling off the edge, a larger diameter lifter would still be on the lobe creating more duration.

03-01-2021	#11
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Measuring lift and duration of stock and perf cams __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

03-01-2021	#12
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,680	Re: Measuring lift and duration of stock and perf cams Just a few questions. 1.What is best phasing of these cams for best performance? 2.Do you have before n after dyno #'s on these or previous cams? 3.How did you find out the specs of your previous cams? Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage