How to advance timing?

[MadisonMPG]

Originally Posted by thatguitarguy

I counted 40 teeth on the timing gear of a 1.0, so moving the belt one notch should result in a 9 degree change. I haven't done this, so check with people who know more about this before going on what I say.

It's 18, not 9. I know half a tooth is 9.

[thatguitarguy]

I just took the 360 degrees of the timing gear divided by 40 teeth to get 9. How is this supposed to work?

I'm not arguing, just asking for explanation.

[MadisonMPG]

I know it's 18 and for the life of me, I can't remember why. You'll just have to trust me on this one...lol

[TimG]

I think the confusion comes from not specifying crankshaft degrees vs. camshaft degrees. The cam rotates 360 degrees for every 720 degrees of crankshaft rotation. Moving the cam pulley one tooth on the belt will give 360/40=9 degrees of cam timing change or 18 degrees of crankshaft timing change.

[Gasoline Fumes]

Originally Posted by wyatt

Once again, the pictures are stolen from team swift. Mine are like this... sorry for the incomplete top gear picture. Rubber belt, 1 - 17mm bolt holding the top gear, 5 - 8mm bolts on the bottom. The reason I wonder is because people on here talk about advancing their timing by anywhere from 3 to 9 degrees, and they talk about it so casually that It seems to me it has to be something super simple like slipping the belt one notch, two notches, etc. The last picture shows the timing belt cover (not mine), but it will show you the 0 to 20, I wonder if that's the advancement...

If you have the 80C/60A cam sprocket, use the 60A timing mark. It's 2° advanced over the 80C mark.