CMonakar

Last night while I was bolting up the 60-2 wheel, basically a stock FD wheel with a 60-2 ring welded onto the outside of it, I noticed that the bolt holes in the FD wheel center are larger than the 4 bolts that hold the wheel to the e-shaft. My 20b wheel is the same way.

I screwed the bolts in, but did not tighten them, and tried moving the wheel to see how much free play there is. I found I could move it about 8/10th of a tooth which is roughly 4-5 degrees. Since the timing wheel is sandwiched between the belt pulley and the e-shaft, I think it's possible that the wheel could shift a bit from the engine's torque on one side and the accessory resistance on the pulley side.

I don't think there is any real danger since I believe it would retard the timing unless it shifted the other way, and I can't think of a reason how it could (abrupt up shifting??).

FWIW . . . .

GtoRx7

iTrader: (5)

You need to get a FD front boss/hub along with the trigger wheel/pulley. Reason being the FD has two "pins" that the wheel goes onto, making zero slop. But that is only if you are really worried about it.

C. Ludwig

iTrader: (27)

Drill it for a pair of roll pins. Or even blind rivets like Mazda used on some of the pulleys. That will positively locate it and you can forget about the slop.

CMonakar

Thanks guys. I think I am going to try to buy or have shims made to fill the gap. Pins are a good idea, but since it is already on the motor it would be difficult to drill precisely. If the shims don't work I guess I'll take the hub off and replace it with the FD hub .