| I was just browsing my email and have no time to reply at work. Sorry about that. One thing I find strange with your cam card is that both center line for the intake and exhaust are 115 degree which conflict with Tomei website [ http://www.tomei-p.co.jp/_2003web-catalogue/e082_cam_VG.html ] It should be 110 BTDC for intake and 115 ATDC for exhaust.(That’s how I adjust the cam initially before dyno tuning).
For the camcard (intake side),
10.25mm = lift
0.45 = valve lash
115 = Cam center line (imo you need to adjust the intake cam to 110 instead of 115 for installation, adjust this later during dyno)
3 = degree (before top dead center) when intake open
54 = degree (after bottom dead center) when intake close Exhaust side,
10.25 = lift
0.38 = valve lash
115 = cam center line
53 = degree (before bottom dead center) when exhaust open
4 = degree (after top dead center) when exhaust close In a nutshell, here’s what I did:
1) Find top dead center
2) Degree both intake to 110
3) Degree both exhaust to 115
I used cylinder #1 to degree right banks and #4 to degree left banks so top dead center is always the same. To make it simple (forget about the camcard), take 2 readings from the degree wheel. One reading is when the dial gauge shows 0.050 inch before the cam’s max lift. And one reading when dial gauge move 0.050 inch after the cam’s max lift. Add this 2 readings and divide by 2 and that’ll be your centerline of the cam. Here’s picture of the setup when degreeing one of local customer’s car. (JWT500 cam with JUN sprockets)
Hope this helps.
1990 300ZXTT Twin Greddy TD06L2-20G (No Nitrous) - SOLD
823rwhp 700rwtq @ 30psi on Mustang Dyno
Best et/mph :10.56 / 142.47mph
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