LLY vs LBZ Reluctor Wheel.

[McRat]

Somebody called and asked about this:

3 holes on LLY, 4 holes on LBZ. 57 teeth LLY, 58 teeth LBZ.
Same apparent "timing" based on TDC indicator and timing holes.

Both based on a 60 tooth wheel, with 3 or 2 teeth removed.

 

[BigWill_21]

Not to sound incompetent but.. What is the comparison for????

Is this the usual BIGGER IS BETTER SITUATION????

 

[McRat]

I'm going grind off one tab and use the LBZ wheel. This way I know next time which tooth to do.

 

[paint94979]

In the LBZ plate was there a different metal finish used? Why did GM add another tooth to the wheel? Any benefits?

 

[McRat]

In the LBZ plate was there a different metal finish used? Why did GM add another tooth to the wheel? Any benefits?

No, it's just different. Bosch computers use 58 teeth and LB7/LLY's use 57, they are NOT interchangeable without filing off a tooth.

If you build an LBZ engine for your LB7 or LLY, you need to remove the LBZ reluctor and swap for the old style or the truck will not run.

 

[SmokeShow]

Good FYI