H Drive Racing Dog Box Transmissions - TOYOTA VITZ SEPANG CIRCUIT
H.DRIVE RACING Products
Dog Box Transmission on Toyota VITZ Super 1500 - SEPANG INTERNATIONAL CIRCUIT
H.Drive Racing Dog Box Transmissions
Dog engagement is normally used in racing applications where fast, precise shifting is needed. Dog gear engagement is facilitated by numerous large teeth (dogs) that mate into matching openings machined into the opposite surface of the drive gear. Unlike the synchro engagement, there is no synchronizing mechanism to assist in equalizing speed. Ideal gear selection—e.g. minimal clashing and wear of the dog rings—is achieved by quick shifts; the motto here is "the quicker the better", so bang away.
There is no depressing the clutch in the conventional sense like with the synchromesh transmission. A momentary break in engine load until the shift is achieved by a quick throttle blip or clutch depression. The driver will then experience the dog ring engaging with the next gear and the throttle can be reapplied. With practice this can be done in milliseconds. In fact, a driver can preload the stick shift in the direction of the next shift, and then when he either blips the throttle or clutch the shifter will quickly click in the desired gear.
With all else equal, dog-engagement gears are much stronger than synchro-engagement gears because without needing to make space for synchro rings, the gears themselves can be made thicker. The number of dogs (teeth) and the size of the openings determine the window of opportunity that the dogs have to engage during the shift event. Rings with a smaller number of teeth provide a more efficient, smoother shift quality. The downsides to this easier engagement are increased noise and abruptness on the shift.
MTI Racing Six Shooter Sequential Transmission
Shot by ChadBee Photography at Atlanta Motorsports Park.
MTI Racing proudly announces their new Six Shooter Sequential Transmission
Conversion System. This conversion comes complete with everything you will
need for no-lift, clutch-less upshifts and automatic rev-matching down
shifts. The conversion system is comprised of:
- sequential transmission
- shift linkage
- load cell shift knob
- neutral/reverse lockout
- electronic control unit (ECU)
Corvette platforms currently supported include: C5, C6, C6 Z06, and ZR1.
The upgraded transmission fits without vehicle modification and bolts
directly to a factory differential and driveline.
MTI Racing has partnered with Pfitzner Performance Gearboxes (PPG) for this
exciting endeavor. PPG is an Australian based company with a well-built
reputation as being one of the world's leading providers of gears for track
and motorsports. Specifically, PPG supplies many of the gears for the
Australian V8 Super Cars Series. With over 600 HP, these cars see massive
abuse every time they take the track.
Think how long it takes to blink your eye just once; the average speed is
about 300 milliseconds. With shift times as low as 50 milliseconds, gear
changes are done in a fraction of the time that it takes to complete one
blink of the eye. This gives you, the driver, the ability to shift faster than other drivers and creates a
true competitive edge over your opponents.
While the full video is still in production, enjoy the intro video created
from our exciting test program. Stay tuned for updates!
Gearbox operation with clutch
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1st cruise with dogbox & HKS T51R,
First night out testing my new PAR dogbox.
1st to 3rd straight cut gears with dog engagement, 4th helical gear with
dog engagement, 5th standard.
DSG Transmission - Explained
What is a DSG transmission? How does a direct shift gearbox work? A DSG
transmission is a dual clutch transmission used by Volkswagen. A DSG uses
two wet, multi-plate clutches to activate separate drive shafts which send
torque via the even or odd gear sets. Because the gear sets are on separate
shafts, this allows for preselecting the next gear, allowing for nearly
instantaneous gearshifts without a total loss in torque. DSG tranmissions
operate a lot like manual transmissions, but they are electronically
controlled and thus the gear selection can be either automatic or manual,
but does not require the use of a clutch pedal as this is all activated
Dual Clutch Transmission - http://youtu.be/oOciX6kdexE
VR6 Engine - http://youtu.be/Y0LKWt3Ttic
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