What is SEAMLESS shifting?

What is SEAMLESS shifting?

What is SEAMLESS shifting?

In simple terms, a seamless shift refers to a gear change that does not require any ingnition cut, fuel cut or any other torque reduction method. Hence the „seamless" transition into the higher gear.

How does it work?

There are many ways of engineering the actual shift mechanism inside or outside of the gearbox to allow for a seamless shift, but the way that the dogring moves on the shaft in the gearbox is still the same. In a seamless shift gearbox, in the process of upshifting, there are 2 gears simultaneously engaged for a few milliseconds, however the gearbox will automatically kick out the previous engaged gear due to the angle cut of the dog gear and dog ring. The acceleration side of the gear and dogring will have the standard locking mechanism, whereas the deceration side has a ramp. 

So when the higher gear engages, the spinning speed of the lower gear is less and once the deceleration side of the dogring meets with the deceleration side of the dog gear, the mechanical force of the parts throws out the dogring, hence no drivetrain power loss and faster acceleration!

In the Kotouc Gearboxes seamless shift, we have engineered a special sequential mechanism that allows the seamless shift on a single selector barrel. Whereas formula one has 2 selector barrels and all controlled electronically, prostock dragracing have multiple shift rods and a special lockout mechanism externally, our special seamless shift mechanism is a new patent pending technological revolution that save both additional parts and weight.

How fast does the seamless gearbox shift?

FAST! As the name suggests, the seamless shifting gearbox has a seamless shift into the higher gear. As the gearbox doesnt require a torque reduction to shift gear, the power from the engine on the next gear is instantaneous. Whether the driver is physcially pulling the shifting lever slower or faster, this doesnt have any impact on the speed of the shift with regards to the dynamic movement of the car. 

What are the pros and cons of the seamless shift gearbox?

The major advantage of the gearbox is the improvement in acceleration of the car. It is unfair to compare to a standard sequential gearbox with shifting, because the standard shifting mechanism in our range of gearboxes is still extremely fast, however the seamless shift is another leve1. The car will accelerate much faster. For a drag racing car, this will signficantly improve the overall top speed of a run and lower the ET considerably! 

The cons of this gearbox is it is limited to drag racing. As the deceleration side of the gear has the automatic kick out, any release of the throttle will result in the gearbox jumping out of gear. Therefore, the limitation of the gearbox is to the drag strip.

When is it available and how can I order?

The Seamless Shift Technology is currently available for all our billet range of gearboxes. The gearbox is sold as a 6 speed. The For orders, contact us on info@kotoucgearboxes.com or by telephone Neal Mendham +420725790769.

SEAMLESS PRODUCTS HERE

IS THE SEAMLESS GEARBOX FOR ME?

If you are serious about drag racing and you want the highest performance, then the seamless is for you. It is a dedicated drag racing gearbox that will give you 0.5 seconds benefit on the quarter mile! The gearbox has been developed to withstand extreme HP and NM applications and generally so far have been installed in cars averaging 1400-1500HP and 1300-1400NM torque, however it is possible to put into a car with any power level.

KOTOUČ GEARBOXES

Jiří Kotouč

Přerovská 561
752 01 Kojetín
Czech Republic

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