Flywheel differences

[safe]

Hi
Of the nine bolt 915 flywheels between 78 and 86 there are 3 different variants: 78-79, 80-83, 84-86.

What are the differences, espacially 79-80, I know the DME reference signal came in 84.

In short I ask because a would like to know if I could use any of these flywheels on my 84 engine that doesn't use the stock flywheel sensor anymore?

[JP911]

I've recently been doing some research on flywheels, and from what I've found the difference between the early SC (78-79) and the later SC (80-83) is in the type of pilot bearing used. The early SC pilot bearing must be pressed on to the flywheel, whereas the later one is attached with 3 bolts. The biggest difference between the SC flywheel and the early (pre-87) Carrera flywheel is the teeth used for the DME reference signal. If you're using carbs or some other ignition that is driven by a crank pulley sensor then you should be fine with a SC flywheel. The pelican catalog shows the same pilot bearing part number for 80-86 911 (later SC to early Carrera).

[safe]

Jon, thanks. I thought it was something like that since the pressure plate and clutch are the same from 72 to 86.