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Author Topic: Black magic problem  (Read 4950 times)
Elnef
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« on: June 13, 2008, 16:39:58 pm »

As you can see on the picture I have some crack problems with my disk
is that normal for one year of use ? I have a spare one also short time used but that have also small beginning cracks so what disk do you guys use one your race engine ?
I have used the disk with a stage 1 kennedy
the engine is a 2979ccm type 4 276hp and 290nm

thanks John
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Udo
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« Reply #1 on: June 13, 2008, 17:27:54 pm »

I never had problems like this , but heard about it . Almost watch for cracks .

Udo
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K-Roc
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« Reply #2 on: June 13, 2008, 18:58:16 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,
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Frank LUX
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« Reply #3 on: June 13, 2008, 19:53:09 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,

Don't wanna play the Smart Ass here, but I noticed the Same...

PS: I joined a Picture of my Black Magic Disc...

Frank
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Oliver Frey
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« Reply #4 on: June 13, 2008, 20:33:51 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,

Don't wanna play the Smart Ass here, but I noticed the Same...



PS: I joined a Picture of my Black Magic Disc...

Frank

Off topic, but it sure is nice for RLR to include a set up guide for this clutch. I ordered mine elsewhere and was told basically figure it out on your own.
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K-Roc
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Posts: 194


« Reply #5 on: June 13, 2008, 23:20:18 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,

Don't wanna play the Smart Ass here, but I noticed the Same...

PS: I joined a Picture of my Black Magic Disc...

Frank

Ya I hope my comment isn't taken as a slam as it was not intended that way, (  Although I am known as a smart ass from time to time However)

Here is a link to the Chinese ones.

http://www.qscusa.com/clutch.htm

Thanks  K-Roc

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Steve D.
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« Reply #6 on: June 14, 2008, 01:23:03 am »

I've seen probably a dozen real black magic disks with loads of cracks in them, but none of them ever actually failed like that- the owners just noticed the cracks during teardowns/maintenance.

Also, all of those clutches had the clover stamp as well.
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Shubee2 (DSK)
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« Reply #7 on: June 14, 2008, 03:38:38 am »

Also look at the center hub where the splines are Franks is thicker then the other one Roll Eyes
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Elnef
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« Reply #8 on: June 14, 2008, 07:35:45 am »

Thanks for youre replys
There was a sfi label on it and if I renember right it says "SFI 1.3" and my spare one has the same center as Franks so maybe my spare one is a china copy or a RLR but what do you guys think buy a new black magic and replace it when the crack come and so on or change to a sort of a super disk and go up to stage 3 in presure plate ??

John
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Roman
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« Reply #9 on: June 14, 2008, 08:12:23 am »

I used a super Daikin and a stage 2 last year on my bug. It could just hold the torque, but started to slip after a like 8-10 runs. A stage 3 might have cured it, but I am going for a 4-puck and a stage2. 
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richie
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« Reply #10 on: June 14, 2008, 08:23:33 am »

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« Last Edit: June 14, 2008, 17:37:39 pm by richie,uk » Logged

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« Reply #11 on: June 14, 2008, 13:52:14 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,

Thanks for the link K-Roc. Jesus these guys copy about everything, check out those "racing Heads" and Aluminium cylinders.....
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Frank LUX
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« Reply #12 on: June 14, 2008, 14:27:09 pm »

Hi I looked as close as I could in your picture's but can not see the SFI label or the Mcleod "Clover" stamp on that disc and that would leave me to believe it is a Chinese Copy of the original American made product,

Where did you purchase that Disc from?

K-Roc,

Thanks for the link K-Roc. Jesus these guys copy about everything, check out those "racing Heads" and Aluminium cylinders.....

What I heard is that those Aluminium/Nikasil Cylinders are great... Wink

Frank
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1960 Ragtop, 2332cc, 48 IDA's, Joe Hunt Magneto, someday it will be back...
1953 Split Window, 1799cc, 48 IDA's, Don Zig Magneto,  OG BRM's...in da works...
SumFun Racecar, 2332cc, 48 IDA's, Magneto
Jay Aldred
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« Reply #13 on: June 14, 2008, 17:31:28 pm »

Mine has also cracked as well as destroying at least 3 brand new Kennedy Stage 2s, one of them on one pass.  I have now changed combo to the competition engineering twin floater set-up, hopefully this will work for me.

Cheers

Jay..
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GetBackOnTrack
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« Reply #14 on: June 15, 2008, 16:02:04 pm »

Hi John. The exact same thing happend to my black magic disc last year. Ran it with a stage 1 pressure plate for like 3 month before it end up cracked like yours, I didnt even ran slicks with it. Dont know if it had that stamp you all talk about. Besides the cracked black magic disc I cracked 2 of my syncroes in my gearbox.

I just shifted to a stage 3 with superdisc a couple of days ago, havnt had the chance to drive with it yet, but a stage 2 with superdisc couldent hold my engine, you know the specs John.

Spring.

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