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| jonboy22 |
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jonboy22
Crazy Courier
Joined: 18 Apr 2006
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| Barry_M2 |
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Barry_M2
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 Posted: 17:25 - 25 Apr 2006  Post subject: |
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Do search mate, this has been covered a few times.  |
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| no_shad |
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no_shad
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| NSR Mick |
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NSR Mick
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| Posted: 23:23 - 25 Apr 2006 Post subject: |
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dead easy you just need to apply pressure on the gear lever whilst backing of the throttle slightly, comes naturally after a bit of practice.
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If you dont like the way that I ride.......Stop trying to keep up!!! |
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| colin1 |
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colin1
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| veeeffarr |
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veeeffarr
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| Barry_M2 |
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Barry_M2
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| kawakid |
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kawakid
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| NSR Mick |
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NSR Mick
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| colin1 |
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colin1
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| Posted: 14:09 - 26 Apr 2006 Post subject: |
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| Toby R wrote: | Surely the clutch actually disengages the final drive from the engine, so you're slotting cogs together rather than easing them onto each other when clutchless changing?
I am a mechanical fucktard though, so that may be lies. |
| Barry_MC21 wrote: | | colin1 wrote: |
all a clutch does is make the two match |
No it doesn't. |
the clutch doesnt slot things together
when clutch plates are apart, pistons and cranks can spin without being connected to the wheels at all
when the clutch plates are together, the drive is transferred to the wheels
the bit in between is like when you apply your brakes
your brake pads are stationary and when you apply your brakes to the discs, it reduces their relative speed to the pads until they are going at the same speed, (ie stationary)
clutch plates do the same thing except usually neither the plates attached to the wheels or the plates attached to the engine are stationary.
if you pulled the clutch in and hit your kill switch, and then released you clutch, you would lock the back wheel as then the engine plate would be stationary like a brake pad, and the plate attached to the wheels would be like the brake disc attached to your front wheel.
so you can make the input to gearbox rpm match the engine output rpm by just getting the revs right rather than using the clutch
when people blip the throttle they are getting the two to match as closely as they can, then they use the clutch to make it a perfect match
you can still change gear even if your clutch doesnt work
my dad drove a vw camper van through the drakkensberg mountains without a working clutch by matching the revs
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| no_shad |
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no_shad
Trackday Trickster
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| Posted: 20:33 - 26 Apr 2006 Post subject: |
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| colin1 wrote: | | Toby R wrote: | Surely the clutch actually disengages the final drive from the engine, so you're slotting cogs together rather than easing them onto each other when clutchless changing?
I am a mechanical fucktard though, so that may be lies. |
| Barry_MC21 wrote: | | colin1 wrote: |
all a clutch does is make the two match |
No it doesn't. |
the clutch doesnt slot things together
when clutch plates are apart, pistons and cranks can spin without being connected to the wheels at all
when the clutch plates are together, the drive is transferred to the wheels
the bit in between is like when you apply your brakes
your brake pads are stationary and when you apply your brakes to the discs, it reduces their relative speed to the pads until they are going at the same speed, (ie stationary)
clutch plates do the same thing except usually neither the plates attached to the wheels or the plates attached to the engine are stationary.
if you pulled the clutch in and hit your kill switch, and then released you clutch, you would lock the back wheel as then the engine plate would be stationary like a brake pad, and the plate attached to the wheels would be like the brake disc attached to your front wheel.
so you can make the input to gearbox rpm match the engine output rpm by just getting the revs right rather than using the clutch |
You are describing friction and inertia, I could accelerate up to 120 on my sv, disengage the clutch, drop to 1st, redline the engine, release the clutch and still lock the rear wheel up. What does that prove? Apart from engine braking being greater than tyre grip, not much, it's a poor analogy.
Toby is correct, all a clutch does is disengage drive.
The engine spins all the time, whereas the rear wheel needs to stop.
| colin1 wrote: | when people blip the throttle they are getting the two to match as closely as they can, then they use the clutch to make it a perfect match |
How can you blip the throttle without using the clutch?
I assume their road speed blips too? 
When changing gear you basically need to take the load off the cogs you are engaging/disengaging, hence backing off the throttle or grabbing the clutch.
Matching revs on a downchange gives a smoother change of gear as you are not spinning the engine up using the rear wheel drive, this results in less chance of locking the rear, reduced wear etc. If you are not using the clutch when changeing down, how do you match revs?
you can still change gear even if your clutch doesnt work
my dad drove a vw camper van through the drakkensberg mountains without a working clutch by matching the revs[/quote]
I don't know if the camper had a synchro box, but he would probably already have to double clutch for smooth gear changes anyway.
Try driving an early mini for a similar experience.  |
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Old Thread Alert!
The last post was made 20 years, 168 days ago. Instead of replying here, would creating a new thread be more useful? |
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