Sequential Trannys

[GTR Dreamer]

do sequentials have a clutch, or is it just to start off or what ever.
thanks!

[Wouter Melissen]

Have you ever been on a motorcycle? They all have sequential boxes and a clutch. The modern paddle shift sequential gearboxes do have a clutch as well, but they are generally automatic. Ferrari's first paddle shift gearbox' main feature was the automatic clutch, it was not an automatic gearbox like most other similar systems.

[KnifeEdge_2K1]

err that would be a semi automatic for ferrari

they use hydraulics and electronics to shift gears

as for a normal sequential transmission they may or may not come with a clutch, in systems without a clutch the clutch is activated electronically by sensors on the shift mechanism which senses when a shift is being made, sequential transmissions may also come in standard control rods or cable shifted applications

[Matra et Alpine]

As you described it K_E they do ALL come with clutches. Some operate the clutch automatically and others still require the driver to control the clutch. Some of the smarter automatic-clutches are 2 clutches to improve gear change time and reduce the stresses in the clutches themselvs.

[taz_rocks_miami]

others still require the driver to control the clutch.

What cars have those Matra? Do you have to depress the clutch before you activate one of the paddles?

[Matra et Alpine]

not paddle ones which I think are all computer controlled semi-auto clutches.

But mechanical sequential.
Genrally kit cars and those using bike gearboxes still have the clutch but seldom used on the way up and even crashed on the way down by those with the budgets to replace cogs every few track days

The Radical's stick with clutch.

The big issue with these paddle systems is that without a LOT of money spent on them they're slow to change and don't offer any finesse in the clutch. So not for real racing outside the heady expensive world of F1

BUT watch the space, new ones are on there way for the Radical with the new Quaiffe 6-speed.

[taz_rocks_miami]

not paddle ones which I think are all computer controlled semi-auto clutches.

But mechanical sequential.
Genrally kit cars and those using bike gearboxes still have the clutch but seldom used on the way up and even crashed on the way down by those with the budgets to replace cogs every few track days

The Radical's stick with clutch.

The big issue with these paddle systems is that without a LOT of money spent on them they're slow to change and don't offer any finesse in the clutch. So not for real racing outside the heady expensive world of F1

BUT watch the space, new ones are on there way for the Radical with the new Quaiffe 6-speed.

Ok, thanks Peter What about modern rally cars? They're paddle shifted but I've seen they have a clutch pedal. What's the deal there? Is the clutch only used for reving the engine on the starting line?

[GTR Dreamer]

thanks everyone

[Egg Nog]

Ok, thanks Peter What about modern rally cars? They're paddle shifted but I've seen they have a clutch pedal. What's the deal there? Is the clutch only used for reving the engine on the starting line?

WRC Rally cars don't use paddle shifting. Instead, they have a sequential box using a shift lever. Pull back on the lever to gear up, push forward to gear down.

[taz_rocks_miami]

WRC Rally cars don't use paddle shifting. Instead, they have a sequential box using a shift lever. Pull back on the lever to gear up, push forward to gear down.

Actualy they do Shawn, I've seen them while watching the WRC on TV this season. But you're right to a point, they also have a lever in case the paddle shifters stop working

How was Mexico BTW? Nice to have you back.

[Matra et Alpine]

yep the WRCs have clutch AND most have adopted paddle shifts. The lever is retained in all cases as a manual backup as it will physical move through the sequential box.
The clutch pedal is there for launch and those times the driver needs to fiddle.
I don't know if the manual change requires driver to use the clutch or whethever there is a physycal clutch control via the lever.

[KnifeEdge_2K1]

matra is right, if your electronics somehow fail its alot easier just to use the backup system then try and fix the damned computer

im not sure about the clutch thing though since in most in car pics and videos ive seen its just a brake and throttle, or maybe the regulations changed since those were taken