I have a buggy (sandrail with paddle tires – and please note paddle tires makes heavy load on the engine/transmission in addition to the total weight of the sandrail) with Gen 1 Hayabusa Engine on it. Here’ are the specs of the engine:
• Upgraded gears, Back cut transmission, heat treat,30mm counter shaft
• Lock-up clutch
• Power commander 3 usb
• comp Turbo (being installed)
• 44mmV-band Tial Wastegate (being installed)
• 50mm Tial Blowoff Valve (being installed)
• In-line Fuel Pump (being installed)
• Fuel Pressure Regulator (being installed)
• Airbox/secondary injectors / Billet Aluminum Airbox/Intercooler and Secondary Injectors (being installed)
• Electric Waterpump + custom heat exchanger (being installed)
• Fuel Controller with 40psi Internal Map Sensor (being installed)
• Oil Blockoff Plates
• Crankcase Vent Filter
• High Flow Airfilter (being installed)
• Carrillo H Beam Rods (being installed)
• Wossner turbo pistons (being installed)
• Spacer Plate (being installed)
• Adjustable cam sprockets (being installed)
• ARP cylinder studs (being installed)
• Microtech data logger (with laptop adapter)
• HD valve springs (being installed)
I'm looking for clutchless system. WOT UPSHIFTING And WOT DOWNSHIFTING.
I have concerns on reliability considering the heavy loads on the engine/transmission.
I’ve been arguing with my friends about going forward with CLUTCHLESS SHIFTING. I will try to explain the sand load situation in here as much as I could so that you can imagine and understand the argument:
The sand here makes the movement of vehicles very tough even on flat surface, Imagine that you have a turbo haybusa engine installed on a full size car with full slicks rear tires and pressing about 20 to 25% or brake all the time (sand vs asphalt). This is almost a resemblance of the load I’m talking about on the engine and drive train.
The differential that we have on the sandrail is linked to the drive sprocket through a motorcycle chain not through a coupler or shaft or gears like quaife differentials. So, main bottleneck here is the chain.
Examples, when we release the clutch suddenly at WOT at first gear while the sandrail is at full stop, probably 2-3 times of doing that will break the chain. If we were upshifting at WOT and releasing the clutch suddenly while the sandrail at mid speed, probably 5-6 times will break the chain.
If the clutch is fully engaged, then we have absolutely no problem with the chain at all.
So, the use of clutch particularly sudden clutch release is a bad thing to do. My argument with my friends is that, using clutchless system upshifting/downshifting is the way to go and that will enable us to avoid using clutch.
However, during the uphill drive, the load is doubled cause the dunes here are huge (about 100 meters) and so steep (have a look at this dune: https://en.wikipedia.org/wiki/Moreeb_Dune) and in some cases we can’t make it over the top simply because when we downshift, we lose time/speed cause we can’t downshift at WOT.
I hope this explains the full picture.
Does anyone know of a system that allow UPSHIFTING AND DOWNSHIFTING at WOT that is safe and reliable and will not harm the transmission?
Thanks,
Abdulla
• Upgraded gears, Back cut transmission, heat treat,30mm counter shaft
• Lock-up clutch
• Power commander 3 usb
• comp Turbo (being installed)
• 44mmV-band Tial Wastegate (being installed)
• 50mm Tial Blowoff Valve (being installed)
• In-line Fuel Pump (being installed)
• Fuel Pressure Regulator (being installed)
• Airbox/secondary injectors / Billet Aluminum Airbox/Intercooler and Secondary Injectors (being installed)
• Electric Waterpump + custom heat exchanger (being installed)
• Fuel Controller with 40psi Internal Map Sensor (being installed)
• Oil Blockoff Plates
• Crankcase Vent Filter
• High Flow Airfilter (being installed)
• Carrillo H Beam Rods (being installed)
• Wossner turbo pistons (being installed)
• Spacer Plate (being installed)
• Adjustable cam sprockets (being installed)
• ARP cylinder studs (being installed)
• Microtech data logger (with laptop adapter)
• HD valve springs (being installed)
I'm looking for clutchless system. WOT UPSHIFTING And WOT DOWNSHIFTING.
I have concerns on reliability considering the heavy loads on the engine/transmission.
I’ve been arguing with my friends about going forward with CLUTCHLESS SHIFTING. I will try to explain the sand load situation in here as much as I could so that you can imagine and understand the argument:
The sand here makes the movement of vehicles very tough even on flat surface, Imagine that you have a turbo haybusa engine installed on a full size car with full slicks rear tires and pressing about 20 to 25% or brake all the time (sand vs asphalt). This is almost a resemblance of the load I’m talking about on the engine and drive train.
The differential that we have on the sandrail is linked to the drive sprocket through a motorcycle chain not through a coupler or shaft or gears like quaife differentials. So, main bottleneck here is the chain.
Examples, when we release the clutch suddenly at WOT at first gear while the sandrail is at full stop, probably 2-3 times of doing that will break the chain. If we were upshifting at WOT and releasing the clutch suddenly while the sandrail at mid speed, probably 5-6 times will break the chain.
If the clutch is fully engaged, then we have absolutely no problem with the chain at all.
So, the use of clutch particularly sudden clutch release is a bad thing to do. My argument with my friends is that, using clutchless system upshifting/downshifting is the way to go and that will enable us to avoid using clutch.
However, during the uphill drive, the load is doubled cause the dunes here are huge (about 100 meters) and so steep (have a look at this dune: https://en.wikipedia.org/wiki/Moreeb_Dune) and in some cases we can’t make it over the top simply because when we downshift, we lose time/speed cause we can’t downshift at WOT.
I hope this explains the full picture.
Does anyone know of a system that allow UPSHIFTING AND DOWNSHIFTING at WOT that is safe and reliable and will not harm the transmission?
Thanks,
Abdulla