Dished Flywheel
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Dished Flywheel
I recently removed a Mcleod Steel flywheel from an RV8 and found it to be dished concave showing 15 thou high at the perimeter compared to the centre. This is irrespective of the wear zone.
A second flywheel I have is exactly the same.
Anyone got any ideas as to the cause.
I've had it skimmed and hope it won't happen again.
A second flywheel I have is exactly the same.
Anyone got any ideas as to the cause.
I've had it skimmed and hope it won't happen again.
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I didnt think they were treated at all ?
A friend had a flywheel made a couple of years ago, and certainly it shown no signs of any heat treating etc and I've owned billet pieces before and again no indication of any heating prior to use.
What sort of friction disc was used ? Was the unit slipped a lot ? How many miles ?
They'll never stay flat their entire life, especially if a lot of heat is out into them
A friend had a flywheel made a couple of years ago, and certainly it shown no signs of any heat treating etc and I've owned billet pieces before and again no indication of any heating prior to use.
What sort of friction disc was used ? Was the unit slipped a lot ? How many miles ?
They'll never stay flat their entire life, especially if a lot of heat is out into them
The Clutch is a Mcleod 10.5" (2750lb) and was in the car for about 5000 miles.
It did do a couple of runs up the Pod.
We pulled it out when it started to slip and discovered the dish in the flywheel and as a result the friction plate looked like it had been making contact only for about 3/4" at the perimeter.
A little disappointed having spent £300 on a steel flywheel.
The same clutch in a similar car with a different flywheel has done 10k miles and had no problems --- so far.
It did do a couple of runs up the Pod.
We pulled it out when it started to slip and discovered the dish in the flywheel and as a result the friction plate looked like it had been making contact only for about 3/4" at the perimeter.
A little disappointed having spent £300 on a steel flywheel.
The same clutch in a similar car with a different flywheel has done 10k miles and had no problems --- so far.
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The plate is organic.
The info out there for the McLeod clutches is very inconsistent.
The 2400 lb version of this clutch is rated at 350 bhp and my clutch (part no 360700) is a 2750 lb version so slightly more clamping force. However some sites show this as 2900 lb. ???
By the way, the plate is not showing any signs of stress or damage. Centre springs still firm in place.
I will do some more asking on line. Thanks for your input.
The info out there for the McLeod clutches is very inconsistent.
The 2400 lb version of this clutch is rated at 350 bhp and my clutch (part no 360700) is a 2750 lb version so slightly more clamping force. However some sites show this as 2900 lb. ???
By the way, the plate is not showing any signs of stress or damage. Centre springs still firm in place.
I will do some more asking on line. Thanks for your input.
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- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
Maybe the same part changed over the years, hence different rating now vs before ?
15 thou isnt huge...but of course it should be flat. Although the friction disc would soon wear into that shape. Almost surprising it hadnt done so already.
But surely there are signs of lots of heat into the clutch if it has become out of true like that ? Heat is really the only thing that will cause it ?
Either way, definitely call McLeod and/or whoever it was bought from.
15 thou isnt huge...but of course it should be flat. Although the friction disc would soon wear into that shape. Almost surprising it hadnt done so already.
But surely there are signs of lots of heat into the clutch if it has become out of true like that ? Heat is really the only thing that will cause it ?
Either way, definitely call McLeod and/or whoever it was bought from.
The car is rarely used in traffic so plate ware is minimal and same thickness throughout.
Real Steel supplied the steel flywheel (some time ago) but I expect them to say it was overheated.
From what I've read, the cooling method used after the raw billet is manufactured is important to relieve any locked in stresses which, if present, I assume would be released when reheated.
Real Steel supplied the steel flywheel (some time ago) but I expect them to say it was overheated.
From what I've read, the cooling method used after the raw billet is manufactured is important to relieve any locked in stresses which, if present, I assume would be released when reheated.