alexcraiggtv
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 posted on 29/6/10 at 11:29 PM |
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blackbird clutch, please help
Just wondered if anyone can help me on this one. I have a blackbird powered Indy with a super sharp clutch. I got about an inch movement from
disengaged to fully engaged. Its like a bloody switch! Someone said about a master cylinder with a smaller piston. Is there any blackbird powered
peeps on here that can tell me what they are using to get more feel in my pedal? Cheers
Not yet KATO!
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Hellfire
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| posted on 29/6/10 at 11:40 PM |
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To be honest I would do a few runs; 10 or more, to get used to the feel before you assume something is awry.
Most clutches on BECs are sharp, they require more revs and more careful "feathering on"... if it really is sharp after you have really
tried. you could try to move the fulcrum of the pivot nearer to the fulcrum of the pedal. this will increase movement of the pedal in relation to
movement of the piston. Or by reducing piston size you will reduce fluid flow thereby reducing clutch sharpness.
The trouble with reducing piston movement it becomes more critical from clutch fully OFF to clutch fully depressed.
My advice is to keep trying with the current setup... hydraulic clutches are not so easy to alter.
Steve
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JF
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| posted on 29/6/10 at 11:40 PM |
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Why not change your pedal ratio? In other words, get the MC closer to the rotating point of the pedal.
If it's to extreme a smaller bore MC would prob be better. Possibly still with a different ratio.
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probablyleon
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| posted on 30/6/10 at 07:39 AM |
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I was in exactly the same position. I also did the 'trying to live with it' thing, it took so much concentration to just pull away it
completely ruined the whole car. I'm very pleased to say I now have what I'd describe as a fairly civilised clutch (haven't stalled
it for ages). I use an R1 rear brake master cylinder (Brembo unit). I attached the push rod almost on top of the rotating point of the pedal. I needed
to modify the pedal to do this (brazed a disc of steel into the 'add lightness' hole and re-drilled). I needed to use a longer clevis to
accept, what is now a fairly extreme angle. I also sprung loaded the pedal to add some resistance. It now feels like a car (albeit a fairly mental one
 )
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alexcraiggtv
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| posted on 1/7/10 at 02:35 AM |
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Thanks for all your help everyone. Nice one!
Not yet KATO!
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