Cam timing:

one tooth off = how many degrees +/-?

Thank you!

 

Divide 360 by the number of teeth, and you get the number of cam degrees per tooth. IIRC, it's something like 17, which is quite a lot!

 

I believe its 7* off the top of my head. but its alot no matter what!

 

From this pic:

http://www.hksusa.com/images_products/2613.jpg

I count 48... so 360 / 48 = 7.5 cam degrees = 15 crank degress

If you give us the cam specs maybe someone can calculate how much valve lift that might be at a particular crank position?

 

It is not the fact that they skipped off mark that's bad, it is the direction they skipped with the curent overlap already there from duration and/or mivec.

Retarding (late) exhaust and advancing (early) intake is the bad direction. This means if the belt skipped over both sprockets the exhaust valve has the greatest chance of touching but the intake valve has more clearance. Not sure if one tooth will caust this, depends on duration or even rpm (torsional travel increases with inertia).

If the car still runs without problems after you fix this mess you should be OK.

 

Or are you asking this as a poor mans adjustable cam gear? If so it's too much

 

it is 15 degrees, I know for a fact and have the broken valve and piston to show for it. fyi, when using HKS adj gears use the timing marks at 12 o'clock on the gear, not the marks at 9 and 3 o'clock. If you lined the gears up with the 9 and 3 o'clocl marks straight across horizontally your exh cam will be OK but your int cam will be advanced 2 teeth or 30 degrees which I found with a degree kit. In case youre wondering that is NOT good.