The Diesel Project - Page 9

franque · 03-01-2021, 11:32 AM

As long as the gear ratios are spot on, overdrive isn't necessary if you get the primary ratio right as well.

Landsvw · 03-03-2021, 12:48 AM

I measure twice, cut, and it’s still too short!

**cheesy** · 03-03-2021, 07:09 AM

Quote:

Originally Posted by Landsvw

I measure twice, cut, and it’s still too short!

Right. Why bother doubling one step if there's a 50% chance you're going to be doing it over anyway.

**cheesy** · 03-14-2021, 10:00 AM

With a suggestion from a contact on another forum, Plan B has become Plan B 2.0. I am dumping CVT and gearboxes entirely and going hydrostatic. Why?

I work on hydraulic systems daily and know how to do it.

I have access to everything I need to do it.

Save for the drive motor, I can mount components anywhere I want to.

Okay, I gotta go dig in my stash.

Darkrider · 03-14-2021, 05:11 PM

With the Hydrostatic idea you could mount the engine like you would with the CVT to put the starter towards the middle of the frame correct? Allowing you to push the motor back further in the frame and minimize the stretch needed if any?

**cheesy** · 03-14-2021, 06:58 PM

Heck, I could mount the engine longitudinally if I wanted.

I'm doing some research on what my limits are to go hydrostatic. With 6.5 hp, those limits are pretty low, 5gpm@2000psi, but I can work with it.

The valving is going to take some thought. I want P to A in the neutral (run) position and P to T in the active (neutral) position. In English, when I pull the clutch lever, oil goes from the pump straight back to the oil tank, when I release the clutch lever, oil goes from the pump directly to the hydraulic motor.

Darkrider · 03-15-2021, 06:25 AM

So if i am understanding it correctly it will function much like the clutch would have on the original bike. pulled in to freewheel and disengage. Release to engage and take off.

**cheesy** · 03-15-2021, 06:43 AM

Yes.

bogieboy · 03-15-2021, 09:00 AM

stupid question Sir Fromage, but is a clutch really necessary with the hydro? i ask because i am familiar with them from working on hydro lawnmowers, they dont use a clutch, but a variable swashplate displacement pump to control the oil, and have a basic bypass valve for the motor if you need to push it (aka trueish neutral) where the actual neutral position is just the pump not changing displacement at all, so no flow to the motor....

**cheesy** · 03-15-2021, 01:14 PM

Good question, and you are correct, but I don’t have the necessary horsepower to run a variable flow pump.

TBH, I like the idea of going hydro but I am giving it a serious Pro vs Con look and Con looks like it may be winning.

bogieboy · 03-15-2021, 03:11 PM

Quote:

Originally Posted by cheesy

Good question, and you are correct, but I don’t have the necessary horsepower to run a variable flow pump.

TBH, I like the idea of going hydro but I am giving it a serious Pro vs Con look and Con looks like it may be winning.

there is always a pump out there that will run with your HP... Honda walk behind mowers come with an available variable hydrostat, as do their snow blowers... the question is will you achieve the flow rates to achieve the speed you desire...

**cheesy** · 03-18-2021, 06:45 AM

Quote:

Originally Posted by bogieboy

there is always a pump out there that will run with your HP... Honda walk behind mowers come with an available variable hydrostat, as do their snow blowers... the question is will you achieve the flow rates to achieve the speed you desire...

Hp wise, the max flow the stinker can handle is 5.7gpm. That’s not even enough to run one of our railsaws.

Em-Maybe. I’m going to ignore the problem until the Monday after Easter. Taking a well earned week off then.

franque · 03-15-2021, 01:39 PM

Yeah, I wouldn't think that would be much power for a hydrostatic motorcycle. Honda actually made one, called the DN 01... It was dreadfully ugly.

**cheesy** · 03-15-2021, 06:14 PM

It’s starting to look like no. I was on the phone with my buddies at the local hydraulic shop and the shuttle valve I need would be a custom job for lotsa lotsa money. On par with a Harley box.

Looks like I’m getting a Comet 30 CVT anyway.

Emerikol · 03-15-2021, 11:53 PM

Would a double-drive setup on a jackshaft make sense?

03-03-2021, 12:48 AM	#2
Landsvw Join Date: Jun 2016 Location: Myrtle Creek Oregon Posts: 873	I measure twice, cut, and it’s still too short! __________________ 1988 Kawasaki KLR250 1969 Honda Z50 silver tag 2002 Ford F-350 7.3 diesel 1975 Corvette 2017 Chevy Bolt “Throttle twisting geek” -LFN
	1

03-14-2021, 10:00 AM	#4
cheesy Moderator Join Date: Jul 2010 Location: Elburn, IL Posts: 5,846	With a suggestion from a contact on another forum, Plan B has become Plan B 2.0. I am dumping CVT and gearboxes entirely and going hydrostatic. Why? I work on hydraulic systems daily and know how to do it. I have access to everything I need to do it. Save for the drive motor, I can mount components anywhere I want to. Okay, I gotta go dig in my stash. __________________ Cheesy ______________________________________ 07 Hi Bird Enduro-Flown the Coop 07 Ural Gear Up 79 Honda CX500 77 VeloSolex 4600 V3 73 VeloSolex 3800 I'm making this up as I go.-Indiana Jones Telling me something 'is for my own good', is a fast way to a fat lip.-Me I don't even care about my own problems, why should I care about yours?-Quote on one of my favorite t-shirts
	3

03-14-2021, 06:58 PM	#6
cheesy Moderator Join Date: Jul 2010 Location: Elburn, IL Posts: 5,846	Heck, I could mount the engine longitudinally if I wanted. I'm doing some research on what my limits are to go hydrostatic. With 6.5 hp, those limits are pretty low, 5gpm@2000psi, but I can work with it. The valving is going to take some thought. I want P to A in the neutral (run) position and P to T in the active (neutral) position. In English, when I pull the clutch lever, oil goes from the pump straight back to the oil tank, when I release the clutch lever, oil goes from the pump directly to the hydraulic motor. __________________ Cheesy ______________________________________ 07 Hi Bird Enduro-Flown the Coop 07 Ural Gear Up 79 Honda CX500 77 VeloSolex 4600 V3 73 VeloSolex 3800 I'm making this up as I go.-Indiana Jones Telling me something 'is for my own good', is a fast way to a fat lip.-Me I don't even care about my own problems, why should I care about yours?-Quote on one of my favorite t-shirts
	1

03-15-2021, 06:43 AM	#8
cheesy Moderator Join Date: Jul 2010 Location: Elburn, IL Posts: 5,846	Yes. __________________ Cheesy ______________________________________ 07 Hi Bird Enduro-Flown the Coop 07 Ural Gear Up 79 Honda CX500 77 VeloSolex 4600 V3 73 VeloSolex 3800 I'm making this up as I go.-Indiana Jones Telling me something 'is for my own good', is a fast way to a fat lip.-Me I don't even care about my own problems, why should I care about yours?-Quote on one of my favorite t-shirts
	0

03-15-2021, 01:14 PM	#10
cheesy Moderator Join Date: Jul 2010 Location: Elburn, IL Posts: 5,846	Good question, and you are correct, but I don’t have the necessary horsepower to run a variable flow pump. TBH, I like the idea of going hydro but I am giving it a serious Pro vs Con look and Con looks like it may be winning. __________________ Cheesy ______________________________________ 07 Hi Bird Enduro-Flown the Coop 07 Ural Gear Up 79 Honda CX500 77 VeloSolex 4600 V3 73 VeloSolex 3800 I'm making this up as I go.-Indiana Jones Telling me something 'is for my own good', is a fast way to a fat lip.-Me I don't even care about my own problems, why should I care about yours?-Quote on one of my favorite t-shirts
	0

03-01-2021, 11:32 AM	#1
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	As long as the gear ratios are spot on, overdrive isn't necessary if you get the primary ratio right as well.
	1

03-15-2021, 09:00 AM	#9
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,054	stupid question Sir Fromage, but is a clutch really necessary with the hydro? i ask because i am familiar with them from working on hydro lawnmowers, they dont use a clutch, but a variable swashplate displacement pump to control the oil, and have a basic bypass valve for the motor if you need to push it (aka trueish neutral) where the actual neutral position is just the pump not changing displacement at all, so no flow to the motor....
	1

03-15-2021, 01:39 PM	#13
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	Yeah, I wouldn't think that would be much power for a hydrostatic motorcycle. Honda actually made one, called the DN 01... It was dreadfully ugly.
	0

03-15-2021, 06:14 PM	#14
cheesy Moderator Join Date: Jul 2010 Location: Elburn, IL Posts: 5,846	It’s starting to look like no. I was on the phone with my buddies at the local hydraulic shop and the shuttle valve I need would be a custom job for lotsa lotsa money. On par with a Harley box. Looks like I’m getting a Comet 30 CVT anyway. __________________ Cheesy ______________________________________ 07 Hi Bird Enduro-Flown the Coop 07 Ural Gear Up 79 Honda CX500 77 VeloSolex 4600 V3 73 VeloSolex 3800 I'm making this up as I go.-Indiana Jones Telling me something 'is for my own good', is a fast way to a fat lip.-Me I don't even care about my own problems, why should I care about yours?-Quote on one of my favorite t-shirts
	1

03-15-2021, 11:53 PM	#15
Emerikol Join Date: Oct 2016 Location: Carrollton, GA Posts: 1,465	Would a double-drive setup on a jackshaft make sense? __________________ First Rule of Aviation: -Never Pass Up The Opportunity to Pee I was struggling to get my wife's attention; I sat down on the couch and looked comfortable. That did the trick! My wife says I only have two faults. I don't listen and something else... If at first you don't succeed, try doing it the way I told you to... The Stable: 2005 Yamaha V-Star 650 - SOLD 2015 Suzuki DR 650 2015 RPS Hawk 250 - SOLD 2016 Ural Gear Up
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