F1 style transmission?
Originally Posted by kozak
sequential is deff your best bet. you just need to hook up either an air cylinder and run a mini compressor and tank or find a solenoid operated linear actuator, these things are super fast but hard to find in the correct force requirements. air shifting and clutchless shifters are used alot on our FSAE cars.
Originally Posted by blown2kss
a t-56 rebuild with g force gears and a trans brace has held 1300rwhp
and as for the actuator astin martin is running a t-56 with paddle shifter in the v12 vanquish. From what I heard ford worked on this setup.
and a ford mustang race car has the same paddle shifter setup making 800 hp.
and as for the actuator astin martin is running a t-56 with paddle shifter in the v12 vanquish. From what I heard ford worked on this setup.
and a ford mustang race car has the same paddle shifter setup making 800 hp.
TECH Regular
Joined: Dec 2005
Posts: 400
Likes: 0
From: Down Under
We made our FSAE car a "paddle shifter" every year. Granted its a bike motor that is already sequential.. but still, not having to take your hands off the wheel helps tons when every 0.1 counts
TECH Fanatic
Joined: Jul 2005
Posts: 1,084
Likes: 1
From: Keller, Texas
http://www.popularhotrodding.com/tec...wst/index.html
this was a cool article in PHR a while back. im pretty sure the guy used a 4l60/80 i bet that thing would be a blast to drive. good luck wioth the project.
this was a cool article in PHR a while back. im pretty sure the guy used a 4l60/80 i bet that thing would be a blast to drive. good luck wioth the project.
http://www.hewland-engineering.co.uk/
They say that they can make anything to customer requirements, seem to have a great reputation. (their straight-cut gears are noisy when compared helical-cut gears, but WILL NOT break)
They say that they can make anything to customer requirements, seem to have a great reputation. (their straight-cut gears are noisy when compared helical-cut gears, but WILL NOT break)
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Originally Posted by johnpate01
their straight-cut gears are noisy when compared helical-cut gears, but WILL NOT break
Chris.
PS, the early sequential shifter (inc the Alfa selaspeed!) where cr*p! notcy and didn't respond when you wanted them to. but the new stuff id gettting much better! i guess like everything it takes a little time to get things sorted! and when you are combininding a complex gearbox with complexe electronics it just makes things worse! but it will be there oneday!
the next thing will be the vw/a DCG! that thing is amazing!
Originally Posted by johnpate01
http://www.hewland-engineering.co.uk/
They say that they can make anything to customer requirements, seem to have a great reputation. (their straight-cut gears are noisy when compared helical-cut gears, but WILL NOT break)
They say that they can make anything to customer requirements, seem to have a great reputation. (their straight-cut gears are noisy when compared helical-cut gears, but WILL NOT break)
Originally Posted by CTSmechanic
Theres no such thing in racing that will not break
http://news.thomasnet.com/fullstory/473624/rss
http://www.rsgear.com
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Originally Posted by Zeus
what about the transmissions they use in supras? It seems like 1200 FWHP is basically a joke to them and I'm almost positive there's at least one in the 8's on a stock 6-speed. Would this be worth looking into or would the low end torque of the TT SBC tear it apart?
Staging Lane
Joined: Jun 2006
Posts: 63
Likes: 0
From: Michigan
How will this car be used? Straight cut spur gears, especially, the thick, low tooth count ones like hewland makes are insanely noisy. Sounds like you're inside a tank when you're driving. You wont be able to talk to a passenger without headsets. A dog box needs to be torn down and the dogs checked for wear periodically. A dog box will allow clutchless shifting(you must lift or use an ignition kill/retard on upshifts, blip throttle on downshifts) but it wears out the dogs fairly rapidly. The majority of rally and race car drivers clutch when they shift. When you're sitting at a light, and you put it in 1st gear, there's a metallic crunch and the car shudders from gears impacting. Every shift, even when using a clutch, brings another crunch. A dog box with straight gears is really a race only item.
Al
Al
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
Posts: 4,983
Likes: 13
From: Texas
A air shifted planetary transmission wouldnt work..... sure up shifting like a 1/4 mile pass but constant up shifting and down shifting with auctuators would be a major pain in the ***.... plus you wont find many more trannys that suck more hp
Something like what is used in the C6R Le Mans cars would be the simplest - looks like a hewland sequential trans, conventional clutch, fuel/spark cutout tied to pressure sensors on the shift lever. You still pull and push on the lever to shift, but get full throttle upshifts, with the engine being cut as you start to put pressure on the shift lever.
Now all you need is to program the throttle blip on the down shift
Now all you need is to program the throttle blip on the down shift
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Originally Posted by under_construction
Something like what is used in the C6R Le Mans cars would be the simplest - looks like a hewland sequential trans, conventional clutch, fuel/spark cutout tied to pressure sensors on the shift lever. You still pull and push on the lever to shift, but get full throttle upshifts, with the engine being cut as you start to put pressure on the shift lever.
Now all you need is to program the throttle blip on the down shift
Now all you need is to program the throttle blip on the down shift
The WRC guys gearboxes will change faster than they can pull the padles on the stearing wheel! they can go form first to swith 9eaither way) in less than a second!!!
now that could come in habdy on the 1/4 mile!
and you dont need throttle blips on the downshifts! well if you can left foot break anyway!!
Chris.
