When racing - use race parts!

Non-engine, eg: aerodynamics, gearboxes, brakes, suspension
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Abarthnorway - Remi L
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When racing - use race parts!

Post by Abarthnorway - Remi L » June 24th, 2012, 9:39 pm

Never really thought of the importance of the clutch quality before - now I do.
clutch failure net.jpg
clutch failure net.jpg (99.3 KiB) Viewed 4866 times
This clutch exploded at approx 9500 rpm (going to 3rd instead of 5th.....) and completely tore the bellhousing 360`, cutting cables, crushing the radiator, breaking parts off the gearbox casing and even made a hole in the bonnet. Pressure plate and clutch plate totally gone - nothing left.

I have used this manufacturer twice before without problems, but not anymore. For racing - use proven racing parts only.

BEWARE.


Remi Lovhoiden
IMG_0382.jpg
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Last edited by Abarthnorway - Remi L on July 17th, 2012, 2:59 am, edited 1 time in total.
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TomLouwrier
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Re: When racing - use racing parts!

Post by TomLouwrier » June 24th, 2012, 11:42 pm

I hope you're OK, Remi?

Tom
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Guy Croft
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Re: When racing - use racing parts!

Post by Guy Croft » June 25th, 2012, 9:51 am

Not good!

Read my post on Rishal's thread...

G

Abarthnorway - Remi L
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Re: When racing - use racing parts!

Post by Abarthnorway - Remi L » June 25th, 2012, 11:37 am

Hi!

Guy - I have read Your comments on Rishals thread.......

Everyone is ok - condition of engine/gearbox unknown - will begin to strip down on wedensday.

Steep learning curve for me - but loads of fun as well - GC head with the right setup deliver good power!!! Car now much more powerful than the last race with old engine.

Will keep You posted regarding damages - not funny - might be a tough, but useful lesson:-)


Remi
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tricky
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Re: When racing - use racing parts!

Post by tricky » June 27th, 2012, 10:46 pm

Whoah ! That made a bil ol' mess, lucky no one was hurt there.
Twice as many valves

Abarthnorway - Remi L
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Re: When racing - use racing parts!

Post by Abarthnorway - Remi L » June 29th, 2012, 10:32 pm

Hi All!


Got lucky this time - engine still in one piece, gearbox and differential seems ok when turning, but is not opened yet.

Upgrade to steel flywheel and race clutch this time - an incident like this should not happen at all - at least not twice.

Gearbox barely hangs on to engine by the bar going to the rear engine mount, and the differential housing.


Remi Lovhoiden
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tricky
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Re: When racing - use racing parts!

Post by tricky » June 30th, 2012, 6:57 pm

Makes me pleased I had the flywheel doweld to the crank now !
Twice as many valves

robert kenney
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Re: When racing - use racing parts!

Post by robert kenney » July 2nd, 2012, 8:15 pm

Yes, very happy to hear no one was injured.
There are many grim stories of deaths from clutch explosions in drag racing. So big was the problem that in the NHRA SFI approved bellhousings (clutch cans) and surrounding balistic blankets are required. The problem still exists and drivers are still injured from these events.
You might consider a more robust bell yourself. Google clutch explosions for further reading and carnage...
Robert Kenney # 111

Abarthnorway - Remi L
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Re: When racing - use racing parts!

Post by Abarthnorway - Remi L » July 17th, 2012, 2:34 am

Hi!

Lesson learned here....seems the pressure plate didn`t handle the abuse. GC prepped flywheel still fine - but I will only use pure steel from now on.

I will post some more pics when I get the time - looked like Hiroshima in there. Smoke from car is gear oil from smashed diff housing. Only damage discovered so far is one bearing on colotti diff - ....and - of course - the complete bellhousing/gearbox housing.

Remi
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Guy Croft
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Re: When racing - use race parts!

Post by Guy Croft » July 17th, 2012, 10:32 am

Actually shows how good the OE FW is. Assuming it had no cracks (only in my exp ever induced by abuse - clutch slipping/loose bolts etc) and properly fitted.

We stopped using them for purely commercial/practical reasons (we only use steel with integral ring gear now).

I've never actually heard of a sensibly machined/balanced cast-iron FW burst per-se through any inherent fault in the FW.

GC
Guy Croft, owner

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