Marty
Shifting
| Author | Comment | |||
|---|---|---|---|---|
Marty Nygard |
Shifting |
Lead | ||
|
OK, so just exactly how does one make multiple, sequential clutchless downshifts with a bike transmission?
Marty |
||||
|
|
||||
steve herrod |
Re: Shifting | #1 | ||
|
Apply pressure to the shifter, then a slight throttle blip. As the revs drop after the blip, the gears should unload enough to snick into the lower gear. Left foot braking can make the downshift process easier. Just make sure your road speed matches the rpm range of the lower gear or you can easily spin the car when the tires try to stop rotating!
|
||||
|
|
||||
GonMad SPBG |
Re: Shifting | #2 | ||
|
The impression that I have gotten is that many folks are just diving into the corner without downshifting at all, then downshifting multiple times (at low RPM) into the exit gear just as they are about to start turning in. That way you can concentrate on maximum braking without the possibility of downshifting upsetting the car.
Marty Bose |
||||
|
|
||||
David Arken |
Re: Shifting | #3 | ||
|
I do it the old fashioned way, under braking, with the clutch, match the revs when I get to the correct gear, I even count going down, 5,4,3 GO!
David |
||||
|
|
||||
Hasty Horn |
Re: Shifting | #4 | ||
|
I don't which method is the most effective (as in the fastest way around) but I'm reasonably certain that David's (Arken) method is the least abusive of the drive train. Strangely, drive-line failure doesn't seem to be a common failure regardless of technique.
Hasty Horn |
||||
|
|
||||
Unregistered(d) |
Re: | #5 | ||
|
1) start breaking appoaching corner
2) Heel and toe (or big toe, little toe depending on how much room your feet have and the way you are sat) brake and blip throttle 3) as revs drop release clutch 4) repeat until in correct gear for corner Get it right and it is the most satisfying feeling, get it wrong and it can be diasterous (i hillclimb on public roads and there is no run-off area). Mix it up with left foot breaking when you are not changing gear. If you are really good try some trailbreaking (on the breaks while still on the gas), its scary but the speed you will carry round the corner will blow you away! I modified my ford transit connect van throttle pedal so I could practice my breaking, I heel and toe without thinking now and it doesnt take too long before it comes natural, couple of days or so. It helps if you wear wide soled work shoes too! regards Tanky |
||||
|
|
||||
Unregistered(d) |
Re | #6 | ||
|
and a proper driver doesnt engine break
|
||||
|
|
||||
JNova |
Re: shifting | #7 | ||
|
I recently attended a shifter kart school at Bondurant at Firebird Raceway. Here is how the instructors told me how to do it.
Downshifts: 1. Left foot brake at your normal braking point 2. When you get close to the end of your braking zone, start downshifting through the gears to the intended gear without using the clutch. 3. Do all the shifting to the intended gear at one time. Example: You are in 6th & need to be in 2nd. In a continuous sequence count down through the gears, 5 - 4 - 3 - 2 - get on the gas at the appropriate point when reaching the correct gear. 4. Optimally you want to time the shift into the final gear & step on the gas at nearly the same momnent, 5. count your gears all the time, whether shifting up or down. While I was not able to do it correctly 100% of the time (maybe 50%) when I got it right it was SWEET. Upshifts: 1. Barely breath the throttle while pulling on the shift lever & it is in the next gear. I did not try no lift shifts as the karts did not have an ignition shifter cut-out interface. Now these were 125ccc shifter karts & have way less inertia than a DSR car, so not having driven a bike powered DSR I do not know if this would work in the same way. It certainly worked well on the shifter karts. Thanks ... Jay |
||||
|
|
||||
glenn cooper |
Re: shifting | #8 | ||
|
Yes it does
G |
||||
|
|
||||
Unregistered(d) |
Re: | #9 | ||
Quote: Dom |
||||
|
|
||||
ken kaplowitz |
Re: Re: | #10 | ||
|
Dom lighten up, most hillclimbs are on public roads but closed off at the time of the event.
ken kaplowitz |
||||
|
|
||||
Doug Miller |
hillclimb | #11 | ||
|
i hillclimb on public roads. can't speak about shifting gears doing it because i use a CVT clutch on my DSR.
For sure on a hillclimb you have to back WAAAAAAY down on the gutsy factor as running off the road REALLY sucks badly. I crashed a datsun 240z when my ego got way out in front of my talent, but somehow road the guard rail and came back down on asphalt. My codriver ran out of road and went off a cliff. he walked away.the car will never drive again. |
||||
|
|
||||
graham2411 |
Re: Shifting | #12 | ||
|
THE BEST AND BY FAR THE EASIEST WAY TO DOWNSHIFT IN A BIKE ENGINED CAR BIKE OR KART IS WITH A FLATSHIFTER I HAVE HAD ONE OF THESE ON MY R1 ENGINED RACE CAR FOR 2 YEARS WHEN CHANGING DOWN THROUGH THE GEARS IT BLIPS THE THROTTLE FOR YOU SO NO NEED TO HEEL AND TOE WORKS BRILLIANTLY YOU CAN ALSO DO FULL THROTTLE CLUTCHLESS UPSHIFTS, THE BEST PART OF IT I FOUND WAS BEING ABLE TO BRAKE AND KEEP THE CAR STEADY WHILL CHANGING DOWN IF YOU WANT MORE INFO GO TO
WWW.FLATSHIFTER.COM , |
||||
|
|
||||
Add Reply
- 2008 Races
- IMSA Lites
- General Discussion
- Vintage: H Modified
- Getting Started
- Driving Techniques
- Aerodynamics
- Car Building
- Engine, Carburation, EFI, Oiling
- Rules Discussion
- Suspension, Tires, Wheels
- Other Technical Discussion
- For Sale: Cars
- For Sale: Engines & engine parts
- For Sale: Misc. Parts, Trailers, . . .
- Wanted: Cars & Parts
- Links, HOW TOs?, Reference info.
- Sold Items, (kept for reference)
- 2007 Races
- 2006 Races
- 2005 Races
- 2000 - 2004 Race Results (read only)
- Weight Debate





















