How to identify a Rover SD1 flywheel ?

[greenstream]

As per tittle ;-)

I have purchased some parts for putting a RV8 into a series, using the series gearbox.

There is a flywheel which is supposed to be from a SD1 - any of you who know how to verify this ?

Morten

[mickeyw]

AFAIK the SD1 flywheels were lightweight aluminium rather than the normal hefty LR steel versions. I seem to recall the clutch was smaller diameter than 90/110 clutch, but same as a series 4 cyl.

[Fatboy]

Don't think they were alloy. SD1 is thinner, the same width as the starter ring. The Range Rover one is twice the width of the ring gear.

[missingsid]

SD1 are thinner than a RRC one and they will take the correct size clutch.

There may be other considerations though.

SD1 manual cars are considered rare to get hold of (my engine was but I did not know about them it at the time) I did have a modified RRC flywheel anyway.

The RRC flywheel is significantly heavier offering a much better drive off road. My S1 will climb over a log bridige (across ways) at tickover even seemingly comming to a halt after dropping into and climbimg out of a gap without stalling. I doubt that an SD1 flywheel would do this.

On the road if giving it a raz changing up the RRC flywheel is a pain as the engine revs will not drop between gears which gives a huge kick in the back but knackers the gearbox.

So which is best? it Depends on if you want a fast(?) road car or great offroad car?

Hope this helps?

Marc.

[FridgeFreezer]

SD1 flywheel you don't go "hnnngg" when you pick it up, and it makes the car much easier to stall when bimbling round off-road (that was my experience anyway). RR one is, as said above, about an inch thick in the main part, visibly thicker than the ring gear (toothed) section.