Does any company make a sequential manual transmission or gearbox that can be used in a DSM?
igs
RRE is working on one.
Pics:
http://www.roadraceengineering.com/parts/sequential_shifter/
Videos (cool!):
http://www.roadraceengineering.com/movies/sequential_shifter/
Pics:
http://www.roadraceengineering.com/parts/sequential_shifter/
Videos (cool!):
http://www.roadraceengineering.com/movies/sequential_shifter/
Not quite.autoxr37 said:
This is a sequential manual, not an F1 paddle-shifted computerized gearbox. This is more along the lines of a Champ car. You still have to push the clutch in and let it out, but this way you won't accidentally go from 5th to 2nd at 90mph and destroy your head. RRE is developing this for rally people AFAIK - look at the big gear indicator display.
The way the transmission works is
1. push in clutch
2. pull towards you to upshift or away to downshift
3. let clutch out
Pretty simple and just like the rally drivers.
Anybody hear any prices on it? I'm sure 5gs or more
Whats the difference between this and the dog box i keep hearing about?
Ray
1. push in clutch
2. pull towards you to upshift or away to downshift
3. let clutch out
Pretty simple and just like the rally drivers.
Anybody hear any prices on it? I'm sure 5gs or more
Whats the difference between this and the dog box i keep hearing about?
Ray
I don't know why your $5k estimate would be unreasonable. This doesn't replace the transmission, it's just a new way to control the stock transmission.Automekanika said:
ijsaul:
The goal with a real racing shifter is to have the shift knob as close as possible to the steering wheel, since you want to move your right hand right back to the wheel as soon as you're done shifting. Assuming the shift force required isn't too great, you could probably put a shorter shift level on there, though
Good point. -IanCornerHard said:ijsaul:
The goal with a real racing shifter is to have the shift knob as close as possible to the steering wheel, since you want to move your right hand right back to the wheel as soon as you're done shifting. Assuming the shift force required isn't too great, you could probably put a shorter shift level on there, though
on rre sequential shifter and RMR shifter:
looks to complicated for me to understand or install.
on sequential transmission:
Quaife 'makes' a sequential six speed for our cars, notice 'make', all they do is make a bellhousing that will match, nothing else, as with any company that makes a sequential transmission, they tend all to be custom, only with a vehicle specific bellhousing to mount to the engine, everything else would need to be custom(axles, linkage, etc.) ie not a bolt in job.
on what Automekanika said, slightly wrong, most professional rally car, Prodrive's WRX for example, use a fly by wire transmission, similar to those in F1 cars, and those tend to be around 95k used for purchase to people like us after they are finished with a rally, no clutch is needed on the prodrive's trannys, because they use hydrallically actuated clutches, but everything on most sequentials are mechanical, no fly by wire stuff.
And about the shift pattern of a sequential(why they are so quick in shifting):
standard H pattern shifters like what is in 99 % manual cars today, actuates a shift fork, which engages a set of gears. A sequential, uses a pattern of grooves wrapped on a drum, or cut into a disk to actuate the gears, and the shift lever becomes a ratchet, each rotating the drum one step at a time. THis makes it impossible to shift from 4th to 1st. without actually engaging 3rd and 2nd along the way, but is slightly difficult for the daily driver.
But for most sequentials that people buy for cars they use dog gears, which is why some of them are called "dog boxs" because, instead of using syncronizers to make all the gears go at the same speed, they use 'dogs' 4 teeth on a gear that slide into large slots on a bottom gear forcing them to go the same speed, why is this important, because then you can shift without using the clutch, because when you shift, all the gears(shafts) slam into the same speed, but creating more wear and tear on other things because it generates so much force because of the instant change of speed. And also this is also why you have to shift them very quickly or the dogs won't go into the slots all the way and bounce back out. Now a sequential can be used with syncros(as on your 5-spds) but that would eliminate the speed advantage of a sequential, but on the other side of the fence, dogs can be used with an H-pattern shifter.
People buy sequential trannys(prices any where from 10k on up depending on what you need) because they last pretty much any amount of abuse thrown at them, and the ablity to shift quickly, and custom gear ratios.
looks to complicated for me to understand or install.
on sequential transmission:
Quaife 'makes' a sequential six speed for our cars, notice 'make', all they do is make a bellhousing that will match, nothing else, as with any company that makes a sequential transmission, they tend all to be custom, only with a vehicle specific bellhousing to mount to the engine, everything else would need to be custom(axles, linkage, etc.) ie not a bolt in job.
on what Automekanika said, slightly wrong, most professional rally car, Prodrive's WRX for example, use a fly by wire transmission, similar to those in F1 cars, and those tend to be around 95k used for purchase to people like us after they are finished with a rally, no clutch is needed on the prodrive's trannys, because they use hydrallically actuated clutches, but everything on most sequentials are mechanical, no fly by wire stuff.
And about the shift pattern of a sequential(why they are so quick in shifting):
standard H pattern shifters like what is in 99 % manual cars today, actuates a shift fork, which engages a set of gears. A sequential, uses a pattern of grooves wrapped on a drum, or cut into a disk to actuate the gears, and the shift lever becomes a ratchet, each rotating the drum one step at a time. THis makes it impossible to shift from 4th to 1st. without actually engaging 3rd and 2nd along the way, but is slightly difficult for the daily driver.
But for most sequentials that people buy for cars they use dog gears, which is why some of them are called "dog boxs" because, instead of using syncronizers to make all the gears go at the same speed, they use 'dogs' 4 teeth on a gear that slide into large slots on a bottom gear forcing them to go the same speed, why is this important, because then you can shift without using the clutch, because when you shift, all the gears(shafts) slam into the same speed, but creating more wear and tear on other things because it generates so much force because of the instant change of speed. And also this is also why you have to shift them very quickly or the dogs won't go into the slots all the way and bounce back out. Now a sequential can be used with syncros(as on your 5-spds) but that would eliminate the speed advantage of a sequential, but on the other side of the fence, dogs can be used with an H-pattern shifter.
People buy sequential trannys(prices any where from 10k on up depending on what you need) because they last pretty much any amount of abuse thrown at them, and the ablity to shift quickly, and custom gear ratios.
There is a similar product that's been out for quite a while in Japan by Ikeya Formula, but so far I've only seen apps for the Silvia & Skyline They have 2 cool little vids here too though
http://www.takakaira.com/performance/ikeyaformula/main.html
They have 2 cool little vids here too though http://www.takakaira.com/performance/ikeyaformula/main.html
Ok well, I'm looking for a sequential transmission, not just a shifter. I found one here:
http://www.hewland-engineering.co.uk/svga/productrange/ftr.htm
Is there a similar company in the states?
http://www.hewland-engineering.co.uk/svga/productrange/ftr.htm
Is there a similar company in the states?
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