Hello,
I was looking at the cam timing on the ROCAM 1.6 engine on the Ford TIS and came across this :
At 1mm lift,
intake opens 12 degrees after TDC
intake closes 24 degrees after BDC
exhaust opens 24 degrees before BDC
exhaust closes 12 degrees before TDC
now, using an online cam duration and overlap calculator (here :
Camshaft Calculator - Wallace Racing) the result is as below
Your cam has an Overlap of -24.00 degrees and has in Intake Duration of 192.00 degrees.
The Exhaust Duration is 192.00 degrees.
The Inlet Cam has an Installed Centerline of 108.00 degrees ATDC.
The exhaust cam has an Installed Centerline of 108.00 degrees BTDC.
what is the advantage of a negative overlap cam?
any responses appreciated.
thanks,
[SIZE=2]Madhu.[/SIZE}