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Author Topic: Shifter ideas?  (Read 4001 times)

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Offline fabr

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Shifter ideas?
« on: May 16, 2010, 08:55:14 PM »
Do the words shifter and hydraulic conjure up any ideas? I have one I'll post up when the components get here about Thursday. Just curious if anyone else has come up with any ideas.
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Offline BDKW1

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Re: Shifter ideas?
« Reply #1 on: May 16, 2010, 10:07:58 PM »
They sell hydraulic shifters for VW's, shouldn't bee that hard for a bike motor. 2 CNC clutch slave cylinders and away you go.
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Offline fabr

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Re: Shifter ideas?
« Reply #2 on: May 17, 2010, 05:54:07 AM »
Nope ,easier than that. Besides, that way(2 slaves)sucks air into the system.
« Last Edit: May 17, 2010, 05:56:59 AM by masterfabr »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Shifter ideas?
« Reply #3 on: May 17, 2010, 07:07:05 AM »
Here's what BDKW is suggesting. Much has been written about it and how it will suck air into system and some ways to avoid it.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Shifter ideas?
« Reply #4 on: May 17, 2010, 07:41:58 AM »
Here's my idea. Closed system. Many years ago I saw an anti-sway setup on a mobile home that had hydraulic cylinders cross plumbed like that and mounted like shocks so that if one side dipped the other was pushed down an equal amount. Zero backlash push/pull linkage.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: Shifter ideas?
« Reply #5 on: May 17, 2010, 08:31:59 AM »
The problem is the shaft side volume is less than the other end of the cylinder. It would be better if you attached shaft end to shaft end then mount the cylinder on the appropriate side to get the correct movement.

My brother's pulling tractor has hydraulic steering since the steering wheel is right behind the distributor. Due to the volume change, it has a reservoir inline with a pressurized air bladder to take up the volume change.
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Offline fabr

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Re: Shifter ideas?
« Reply #6 on: May 17, 2010, 08:42:45 AM »
When you cross them it's a wash.Equal volumes are displaced and no need for the bladder or a reservoir.Oops,head in ass. :-[ Livewire you are of course correct. This is how I should have drawn it.
« Last Edit: May 17, 2010, 09:16:16 AM by masterfabr »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Shifter ideas?
« Reply #7 on: May 17, 2010, 09:23:33 AM »
Reason for the need of the double acting cylinders is to balance pressure on both sides of the ram to prevent air being sucked into the system as you "pull" the ram in one direction . At first glance a single acting cylinder would appear to work,and it will to a point but it will have the air issue from what all I have read. This may not work but IMO it's bound to be far better than morse cables ,easier to route and more positive feel.Bunch cheaper also.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Hammerworks

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Re: Shifter ideas?
« Reply #8 on: May 17, 2010, 10:14:29 AM »
I made something similar to adjust a very large belt grinder.It had a threaded rod in front of one cylinder,feeding the rod in and out.It worked perfect,very sensative.
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Offline fastcorvairs

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Re: Shifter ideas?
« Reply #9 on: May 17, 2010, 01:08:33 PM »
            I can see one problem here that applies to steering.   (BUMP STEER) only in this case to much up and down movement of the cyl rod. If your going to use a rod end to fix to.   Finding the proper pivot point mite be a fur ba.  Them type of cylinders the rod has to push pull straight in and out or you'll wear the seals out real fast.  They get around that on my AJ shift by having a roller on the bottom of the shifter that contacks the face of the rod that goes into the cyl. 
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Offline fabr

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Re: Shifter ideas?
« Reply #10 on: May 17, 2010, 01:52:37 PM »
I understand your point. I don't THINK it's going to be an issue though. It takes far less force to shift the busa and therefore the sideloads ,I hope/think will be tolerable. The cylinders I have coming are basically the same as the SS crimped end cylinders on my Fadal. Fadal gets like 250 bux for them. I bought these for 19 bux each!. Cheap enough to not worry about.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: Shifter ideas?
« Reply #11 on: May 18, 2010, 08:08:48 AM »
Where were the $19 cylinders from?
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Offline fabr

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Re: Shifter ideas?
« Reply #12 on: May 18, 2010, 08:13:38 AM »
Logged
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Shifter ideas?
« Reply #13 on: May 19, 2010, 09:09:54 PM »
Mounted cylinder today.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Grimm Reaper Racing

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Re: Shifter ideas?
« Reply #14 on: May 20, 2010, 06:37:18 AM »
Do you have to be careful of your travel limits?  I would think that you would be able to make a lot of force with the shifter, and therefore push the shifter linkage on the Busa too far and potentially break it.  Would I be correct in assuming that?  I don't know for sure.
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