Is anyone running or has run one of these, just before I purchase one I thought I'd ask for any experience or thoughts, it would be going on a cross flow for road and track use

I have lightweight flywheel and multiplate clutch on a 5L RR engine and it works well. No issues with drivability or bite despite the dire warnings that were mooted when I had the idea.
Engine is in a light chassis which reduces the demands of course.

Cheers!

An ultra light flywheel will be a real bitch on the road, and unless your good with the required downshift procedure you'll get very proficient at changing clutches.

Would stick with lightweight - no less than 1% of vehicle weight

HTH

1100cc xflo flywheel is a !ot lighter than the 1600.
For road use go light but not ultra light .

How light is ultra light?

I have a 5kg flywheel on my Xflow and it's great! Nothing at all dodgy to report, pulls away fine with an AP Racing clutch. Hill starts, the lot, no issues at all.

I've seen one as low as 2.6 kilo , but I think that's taking the pi$$, Ill go with what's been said and go light which I around the 5 mark

quote:

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Originally posted by mark.s
I've seen one as low as 2.6 kilo , but I think that's taking the pi$$, Ill go with what's been said and go light which I around the 5 mark

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Be very careful and buy from a reputable source especially if going for the 'skeleton' type

Mate bought one for a Pinto off ebay and it proved a nightmare to balance
Infact iirc it came loose and wrecked the end of the crank

I don't want to be going there !
I'll go for a steal one around the 5 kilo mark , thanks for the info lads


Mark

My pinto is about 4kg. perfect, my mates RH is running a fast pinto, bike carbs etc. has gone very light. Picks up in an instant but has lost engine braking and bottom end grunt, forever changing down. Very quick off the mark though, pays your money etc.