jeff huffman
New Member
- Joined
- Nov 11, 2015
I am trying to understand how the Timing works. On a sbc the timing gears line up dot to dot on compression. Which is at the start of the intake cycle. So when putting in the distributor you turn the crank 360 which opens and closes the #1 intake and that puts fuel charge in the cylinder and then it fires on compression strock. Which puts the dots on the timing chain both at 12 oclock. Now on the gn national the dots in line at crank up and the cam dot down should be the start of the intake cycle. Is this when the injectors start the fuel charge and after the the intake cycle after the 360 on the crank it fires through the ecm with the timing marks at 12 oclock on both gears? Just thinking the timing set on the crk sensor at the start of the intake cycle is when the injectors should start . Is that why you set the cam sensor with gears at 12 oclock crank and 6 oclock cam?