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Old 07-22-2012, 06:12 PM   #1
sorrowfulkiller
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Member#: 170439
Join Date: Jan 2008
Location: Sioux Falls, SD
Vehicle:
I <3 Lamp

Default Anyone wanna make me something?

I have the need for a shift knob. Before you think "well go out and buy one!" I need a shift knob of my design. I'll be using a dogbox transmission in my car and I'd like to get a shift knob made that I can put microswitches inside of that will allow me to cut ignition/fuel to switch gears when the shift knob is pulled or pushed either direction. I have yet to get in google sketchup or anything to design such a thing. What I can tell you is it will either have to be made of aluminum or delrin (or similar materials), will be 2-3 peices with a machined shafthole on the bottom as the pivot point. The upper portion will also need to have enough space to insert 2 micro switches into and obviously there will have to be a spot for 2 small (20-22 gauge) wires to come out near the bottom of the knob.

If anyone has any way of making this it would be greatly appreciated and obviously you would be reimbursed for your services. I'll see if I can draw up a rough draft tonight in sketchup after I take the GF to the batman movie.
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Old 07-22-2012, 09:36 PM   #2
bugeyesubie
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Location: Calgary
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2002 WRX
Silver STi swap 380wph!!

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Sounds like a ton of work for something you can do with your foot
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Old 07-22-2012, 11:24 PM   #3
sorrowfulkiller
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I <3 Lamp

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Quote:
Originally Posted by bugeyesubie View Post
Sounds like a ton of work for something you can do with your foot
A machine with a set job where the parameters will never change is much more precise than a man.

Plus I'm going to wire it so I can disable it for normal driving. I just want to use it while racing.
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Old 07-23-2012, 06:09 AM   #4
Zefy
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Location: Coquitlam, BC, Canada
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1979 BRAT / 01 RSTI
99 2.5TS (DEAD) / 87 GL

Default

so this is a sequential dog box?

this will be kinda bad for downshifting don't you think? You want to be able to blip the throttle while downshifting. Gonna be kinda tough if you're always cutting ignition/fuel every time you touch the shifter.
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Old 07-23-2012, 09:15 AM   #5
sorrowfulkiller
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I <3 Lamp

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Quote:
Originally Posted by Zefy View Post
so this is a sequential dog box?

this will be kinda bad for downshifting don't you think? You want to be able to blip the throttle while downshifting. Gonna be kinda tough if you're always cutting ignition/fuel every time you touch the shifter.
Already got that figured out, going to use the clutch switch to cutopen the signal while the clutch is engaged so on downshifts it wont mater.

Also no, not sequential.
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Old 07-23-2012, 12:50 PM   #6
tobylazur
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What size are the micro switches?
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Old 07-23-2012, 03:37 PM   #7
sorrowfulkiller
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I <3 Lamp

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Quote:
Originally Posted by tobylazur
What size are the micro switches?
Sorry came across some trouble reinstalling sketchup on win 7 64 bit. I'm working now so I can post up the microswitch after work.


EDIT: Nevermind, found it
http://www.digikey.com/product-detai...15PB-ND/523397
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Old 07-23-2012, 04:42 PM   #8
Zefy
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Location: Coquitlam, BC, Canada
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1979 BRAT / 01 RSTI
99 2.5TS (DEAD) / 87 GL

Default

Quote:
Originally Posted by sorrowfulkiller View Post
Already got that figured out, going to use the clutch switch to cutopen the signal while the clutch is engaged so on downshifts it wont mater.

Also no, not sequential.
pretty much all the dog box users I've seen do not clutch in while downshifting.

Interesting concept though. Other potential problem is bouncing. Depending on how sensitive the micro switches are they might get pressed from the shifter bouncing around. Perhaps it would be better to incorporate something like this into the shifter arms instead?

what is the intended purpose of the car? Drag racing?
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Old 07-23-2012, 08:08 PM   #9
sorrowfulkiller
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I <3 Lamp

Default

Quote:
Originally Posted by Zefy View Post
pretty much all the dog box users I've seen do not clutch in while downshifting.

Interesting concept though. Other potential problem is bouncing. Depending on how sensitive the micro switches are they might get pressed from the shifter bouncing around. Perhaps it would be better to incorporate something like this into the shifter arms instead?

what is the intended purpose of the car? Drag racing?
Now that I'm thinking of it... the rom that I'm using will only allow the fuel to be cut once certain conditions are met ( rpm and gear dependant) So honestly it shouldn't matter what the microswitches are doing. As far as tightness goes so they won't just bounce around I'm planning on giving them just enough room so they dont contact but are still on the wall of the shifter, possibly may add some small springs around the plunger portion of the switch to help out keeping it steady.

Also the intended purpose is street, road racing and occasional drag racing.
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Old 08-07-2012, 07:33 PM   #10
Strangerdanger
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WRB

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Have you had any one make this item for you?
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Old 08-07-2012, 08:25 PM   #11
sorrowfulkiller
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I <3 Lamp

Default

Quote:
Originally Posted by Strangerdanger
Have you had any one make this item for you?
Nope not yet
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Old 09-07-2012, 12:19 PM   #12
ejeighteen
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Join Date: Sep 2011
Default Industrial Design Student...

As the title states I'm an industrial design student and we have every tool in our lab you could possibly need, we use solidworks cause sketch up is extremely limited but if you can get the dimensions we can go from there...
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Old 12-17-2012, 01:04 PM   #13
DaFe 7
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hey u still need a knob made dude? let me know
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Old 12-22-2012, 10:57 AM   #14
CEdwards89
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Default

I talked to him a little bit about makjng it for him and never heard from him again
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