Argh one of them days...another broken part found!!
Turbo Mini Forums

I did lap it on, it looked like a nice even colour all round on the taper and crank. I reckon the bolts have worked loose and caused fretting, possibly causing the taper to loosen, which then caused the keyway to start shearing!

I think the outer section will be salvagable, need a new centre now. Oh and its wiped the clutch seal out and scored the primary bush. :(

Edited by matty on 15th Jun, 2009.

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1/4mile in 13.2sec @ 111 terminal on 15psi

bugger :(

ok, couple of thoughts,

I would ditch that clutch plate and fit one without springs in it, all they are doing is creating backlash.

I reckon the (more substantial) bit that fits on the flywheel could be treaded instead of the pressed plate and caphead bolts put in from the other side.

when reasembling use a high quality locktite on the bolts and the flange.

Matty, i have lots of centres if it help the job along, unfortunatly finding one thats a good fit in that centre[if you are gonig to salvage it] meens either accurate measuring of trying them for size, as the shoulder on the centre are all different sizes +or - .5mm .
so unless you find a cock on fit the flywheel will run excentris slightly and ned rebalancing,

carl

for get the bit about differnt sizes, i just realised the verto mounts on the front side , i was refering to the rear shoulder that i use to mount my flywheels,

Edited by fastcarl on 15th Jun, 2009.

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sorry to hear that mate, i hope you sort it soon.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

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do you think thats all that was making the noises matt , or are you having the primary gear cover off as well ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

http://www.kad-uk.com/media/kad-flywheel-washer.jpg



Mine used to chew washers try one of these!

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

Ive chewed up one of the washers previously too, now I just put in old genuine ones

Your testicles are bloody lucky

Joe - Ah I see what you mean about the bolts, I reckon thats a good call. There is at least double the amount of material to thread doin it the other way round.

Carl - If you've got a spare centre that would be good, just let me know how much you want for it.

Robert - Im undecided what to do about the transfer housing...It will come out in the car but its a PITA to do, If I do have to take it off or take the engine out im tempted to go flip front TBH. I might anyway thinking about it, as lapping the flywheel on in situ wasn't easy last time!

Nic - Yep damn lucky!

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1/4mile in 13.2sec @ 111 terminal on 15psi

i cant see what was making the noise in what you found so far ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

swaping the bolts to the otherside, the only prob i can see is if the head of the bolt causes an issue, whats in that space? the spring fingers?

if your going to have the centre section off the verto you could just lap that bit to the crank, much easier that fiddling with the wholer assy.

On 15th Jun, 2009 matty said:
Joe - Ah I see what you mean about the bolts, I reckon thats a good call. There is at least double the amount of material to thread doin it the other way round.

Carl - If you've got a spare centre that would be good, just let me know how much you want for it.

Robert - Im undecided what to do about the transfer housing...It will come out in the car but its a PITA to do, If I do have to take it off or take the engine out im tempted to go flip front TBH. I might anyway thinking about it, as lapping the flywheel on in situ wasn't easy last time!

Nic - Yep damn lucky!

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1/4mile in 13.2sec @ 111 terminal on 15psi

it was the loud 'metal tag in the spokes of a bike wheel' sound on the overrun matt that i couldnt relate to the flywheel , be a shame to wack it all together and not fix it ,thats what i was thinking ,flip front time lol!!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

As you say you have twice the material thickness to thread but in doing this the plain portion of the bolt is passing through material half the thickness so is going to be subject to double the shear loading, ie shear force remains the same but now its being applied to half the original area. Correct me if that sounds wrong.

Not an ideal scenario to be getting into. Just a thought.

But I have to agree with changing the clutch plate. The springs are being over powered by the engine and the force behind the 'whip' is hammering your key. much like having your pre-load to soft and bottoming out your shocks.

On 15th Jun, 2009 matty said:
Joe - Ah I see what you mean about the bolts, I reckon thats a good call. There is at least double the amount of material to thread doin it the other way round.

Carl - If you've got a spare centre that would be good, just let me know how much you want for it.

Robert - Im undecided what to do about the transfer housing...It will come out in the car but its a PITA to do, If I do have to take it off or take the engine out im tempted to go flip front TBH. I might anyway thinking about it, as lapping the flywheel on in situ wasn't easy last time!

Nic - Yep damn lucky!

Edited by Mr Joshua on 16th Jun, 2009.

Own the day

Im inquiring about a flip front as we speak...it may be a slightly different colour if I make it to Avon, but jobs like this aren't any easier with a steel front!

Do you reckon those bolts could take 60lb/ft of torquing. They look to be M10 x 1.5 thread and are 10.9 grade?

Joe - I thik the heads would just about clear the springs. :)

Edited by matty on 16th Jun, 2009.

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1/4mile in 13.2sec @ 111 terminal on 15psi

http://www.theminiforum.co.uk/forums/index...showtopic=60705

I had doubts in my own mind as to whether the sprung clutch plate was a good idea or not with these sorts of power levels

Apparently it was the only one available in 190mm at minispares?? I did ask (a couple of times to make sure) but I always seem to get served by the guy that has no idea!

I'll stick with it for now as money/time is tight. Ah so 45lbs it is then!

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1/4mile in 13.2sec @ 111 terminal on 15psi

Matty, this is your bollox your playing with mate, if it goes wrong it could be very painfull, if any doubts in the plate then change it. I'll lend you the cash till after avon if you want. Keep your nuts safe!

Team Racing

http://www.minispares.com/Product.aspx?ty=...ERTO%20PERFOR...

yo need the C-AHT594

On 16th Jun, 2009 matty said:
Apparently it was the only one available in 190mm at minispares?? I did ask (a couple of times to make sure) but I always seem to get served by the guy that has no idea!

I'll stick with it for now as money/time is tight. Ah so 45lbs it is then!

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1/4mile in 13.2sec @ 111 terminal on 15psi

Edited by Sprocket on 16th Jun, 2009.

doh!

also use high strenght lock tight on the bolts matty
i remember the treads let go on one of my clutches when tightening these to 40 ft pounds use 35 ftp more than enought with the lock tight