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auto clutch pull
oadamo - 27/12/07 at 03:50 PM

has anybody had a go at msking some sort of clutch pull. so if you where to have a paddle shift it would pull the clutch just before it went into gear.because mine clutch is hydraulic i could overide it with the pedal.i could just put a tee in the hydraulic line.
adam

[Edited on 27/12/07 by oadamo]

MikeRJ - 27/12/07 at 04:07 PM

quote:
Originally posted by oadamo
has anybody had a go at msking some sort of clutch pull. so if you where to have a paddle shift it would pull the clutch just before it went into gear.because mine clutch is hydraulic i could overide it with the pedal.i could just put a tee in the hydraulic line.
adam

[Edited on 27/12/07 by oadamo]


A Tee in the clutch slave hydraulic line wouldn't work, you'd just push fluid into the other master cylinder. You'd have to plumb a master cylinder with no reservoir in line as is done for hydraulic handbrakes.

Anyway, I doubt you could get this working very well, it would make the gearchange heavy and getting the clutch biting point at the right place would be tricky. Why not use an ignition cut as most competition cars with sequential boxes do?

nitram38 - 27/12/07 at 04:15 PM

If you are going bec, just fit a trickshifter. After 1st gear, you can do clutchless changes.
With the auto-blip function, these can be down-changes too.

jacko - 27/12/07 at 05:01 PM

NSU ro80 cars had a device were when you put your hand on the gear lever it pressed a switch that worked a clutch servo
These cars were miles ahead of the time
could you rig a micro switch on the paddle shifter to do the same
Jacko

nitram38 - 27/12/07 at 05:21 PM

Ignition cut is the safest option........

ReMan - 27/12/07 at 06:18 PM

quote:
Originally posted by jacko
NSU ro80 cars had a device were when you put your hand on the gear lever it pressed a switch that worked a clutch servo
These cars were miles ahead of the time
could you rig a micro switch on the paddle shifter to do the same
Jacko

I used to have one
To this day one of the best car's i've had, might get another one day
Points of note were:-
The faster you went the quieter it got.
It was VERY quiet!
tDisd about 25 mpg
Looked way ahead of its time.
Engine was knackered at 25000.

Just off to have a look on the Bay of E now

matt_claydon - 27/12/07 at 08:41 PM

quote:
Originally posted by jacko
NSU ro80 cars had a device were when you put your hand on the gear lever it pressed a switch that worked a clutch servo
These cars were miles ahead of the time
could you rig a micro switch on the paddle shifter to do the same
Jacko


VW Beetle Semi-Auto had the same thing.

As said above though, why bother with the clutch? Just use ignition cut and (if desired) auto-blip, eg Trickshifter.

oadamo - 27/12/07 at 08:52 PM

ive spent a bit taking a starter solenoid apart. theres a bit of power in one of theses and there small. night work ill have to see ????.
adam


tks - 27/12/07 at 09:55 PM

guys...

the best way to change gears is pneumaticly.

i know electrics saves hassle with air etc.

what you need:
- 1 small piston like 50mm stroke 20mm bore
- 1 5/3 valve (in middle position it should be open)
- 1 air reg. (to operate cilinder at 3bars)
- 1 fire extinguiser (small) only the bottle is needed
- 1 12volt air compressor.

- small stuff like hose and connectors.

i also made an injection cut (its easyer then an spark cut and also better for your CAT/PLUGS)

--- Needings for an injection cut ---
- 1 P channel mosfet with as low RDSON as you can get (i used an 0,02ohm one)
- 2 200Ohms 1,5watts resistors
- 1 to feed the injectos always with 14volts (accros the mosfet - to fool the ECU--)
- 1 to charge up the gate of the mosfet
- 1 NPN 1 amp transistor.
- to pullup/down the fet

the sheme is very basic (can draw on command)

now if some one tells me how a auto blib works......

then i can build that to!

tks