Lightened flywheel

mercutio · Post by **mercutio** » Mon Nov 16, 2015 8:23 pm

they have used 2 different alloys to manage the heat movement i am sure given the same treatment even a solid flywheel would show warpage
Your the engineer Phil you now more than me about why they would use different materials together to cope with heat?

Post by **4thgenphil** » Mon Nov 16, 2015 8:39 pm

I wouldn't, you get warping when you have 2 different metals heated at the same time, like your ally head on a steel block.

like i said, im not sure how much abuse this flywheel had, it could have been smashed from new with a clutch and pressure plate like mine. For a road car with a sensible clutch probably will be ok but for a full on track/drag car i wouldn't consider it.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Nov 16, 2015 8:56 pm

mercutio wrote:they have used 2 different alloys to manage the heat movement

Not looked at a Fidanza, so I don't know where they have used one metal and where the other, but...
I can't see how heat soak would come into that choice at all - I would more suspect using 2 different metals for cost/durability trade-off.

Getting something light but also hard enough for the ring gear teeth, is expensive, so use something cheap and light for the main bulk of it and something heavier (but harder and more expensive) for the outer edge... (as I said though, I haven't seen a Fidanza, so I don't know where they've used what, so don't know if that's what they've actually done...)

chrismc · Post by **chrismc** » Mon Nov 16, 2015 9:57 pm

Yes Rich has advised that I avoid Fidanza.

Didn't ask for an exact reason but I believe it's quality related...& that's good enough for me

chrismc · Post by **chrismc** » Sat Nov 28, 2015 9:33 am

Still required!

njord · Post by **njord** » Sat Nov 28, 2015 3:18 pm

Ive got a solid one for sale. Not got it up yet. I want 60quid plus postage for it

Pm me if u need more info

njord · Post by **njord** » Sat Nov 28, 2015 3:28 pm

I might be wrong saying this but a flywheel should not really get that hot.

The only time it will heat up when the cluch slips due to either to to wore plates, too much torque for clutch or driver slipping cluch when setting off.

The flywheel probably failed due to the drive riding the cluch overheating it.

I am using a alloy flywheel for the 7.25 cluch and I have no worries about using it.

I would also happily use the fidanza flywheel if I was using a standard cluch plate.

chrismc · Post by **chrismc** » Sat Nov 28, 2015 6:08 pm

PM sent

Post by **Drax** » Sun Nov 29, 2015 12:11 am

ive been using a Fidanza and standard clutch on my track lude for around 4 years now, done many many trackdays and never had a single issue from it

chrismc · Post by **chrismc** » Sun Nov 29, 2015 10:07 am

Seems I can buy a new one for ~£150 so I think that's the route il take.

Thanks all

Chris