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> 917 balsa shift knob specs (now a progress thread), MK1 made, pics included
VaccaRabite
post Jan 16 2009, 09:38 AM
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Does anyone have the specs for the 917 shift knobs? I am talking about the ones that were laminated wood.

I am looking for:
What wood was used in the lamination
What are the dimensions
How was it attached.

I know someone already makes these, and I could just buy one. However, I am interested in learning how to use a wood lathe and my grandfather is going to give me his and all his tooling for it. Instead of just turning eggs until I get the idea of what I am doing, I figured this would be a more useful project to start with.

Zach
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dr914@autoatlanta.com
post Jan 16 2009, 09:59 AM
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Hi Zach. We have one here in the showcase



QUOTE(Vacca Rabite @ Jan 16 2009, 08:38 AM) *

Does anyone have the specs for the 917 shift knobs? I am talking about the ones that were laminated wood.

I am looking for:
What wood was used in the lamination
What are the dimensions
How was it attached.

I know someone already makes these, and I could just buy one. However, I am interested in learning how to use a wood lathe and my grandfather is going to give me his and all his tooling for it. Instead of just turning eggs until I get the idea of what I am doing, I figured this would be a more useful project to start with.

Zach
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r_towle
post Jan 16 2009, 10:11 AM
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Zach, post a picture.
It might be either rosewood or mahogany...gotta see it.
You can use either, both will gum up the tools.
First thing to learn with a lathe is how to hand sharpen the tools.
Its really important to learn this...
Rusty does pens..he can walk you through the sharpening process, or I can....dont use a machine, use oil stones, old school.
I have tried all the new fangled diamond stuff...oil is better for a razor like sharpness.

For the shape, you will have to take pretty precise measurements.
Quick and simple to do with a contour gauge, then trace that onto a piece of paper.
So, you could take the gauge into a car, get the contour, then trace it on the spot...fold that up and be on your way.

Mounting should be similar to the stock on.
That is a hole of dimension X and buy a new jam bushing to insert into the base of the knob.

Rich
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VaccaRabite
post Jan 16 2009, 10:14 AM
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Neat!
Any chance I could get you to pull some specs off it for me? Maybe some reference photos? I'm not planning on making these to sell (don't want to step on toes) but I'd like to have a better idea of what I am making.

Zach

QUOTE(dr914@autoatlanta.com @ Jan 16 2009, 10:59 AM) *

Hi Zach. We have one here in the showcase



QUOTE(Vacca Rabite @ Jan 16 2009, 08:38 AM) *

Does anyone have the specs for the 917 shift knobs? I am talking about the ones that were laminated wood.

I am looking for:
What wood was used in the lamination
What are the dimensions
How was it attached.

I know someone already makes these, and I could just buy one. However, I am interested in learning how to use a wood lathe and my grandfather is going to give me his and all his tooling for it. Instead of just turning eggs until I get the idea of what I am doing, I figured this would be a more useful project to start with.

Zach
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VaccaRabite
post Jan 16 2009, 10:16 AM
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Rich, I don't have any pictures of the original ones. I don't want to work off the repoped products if I can avoid it. Hence the call for specs and pictures, etc.

Zach
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Challe
post Jan 16 2009, 11:03 AM
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Well a balsa shift knob, was made of balsawood (IMG:style_emoticons/default/w00t.gif)

the Porsche Carrera GT has an shift knob in balsa.

(IMG:http://www.seriouswheels.com/pics-pqr/Porsche-Carrera-GT-Interior-Console.jpg)

917 version is more "ball"shaped
This is the best pic i found from a 917 cockpit

(IMG:http://www.porsche917.com.ar/Z917interior01_small.JPG)
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Richard Casto
post Jan 16 2009, 11:17 AM
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I would be interested in the specs as well. I have also considered making one for myself.

If someone could post a link to whoever makes repro version today, that would be helpful as well.
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jmill
post Jan 16 2009, 11:21 AM
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Looks like a laminate glue up with 2 types of wood. Balsa is pretty soft. I would think you could use just about any wood you wanted as long as you liked the colors.
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JoeSharp
post Jan 16 2009, 12:21 PM
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I thought it was clear pine and magohany. Balsa is to soft to hold up to the handling. Thomas has one and I'll take a look at it for you Zack.
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dr914@autoatlanta.com
post Jan 16 2009, 12:40 PM
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no not balsa. The one we have is original old stock so I think. I will take a pic in a moment and post
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sixnotfour
post Jan 16 2009, 01:24 PM
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huge bird thread about them;
http://forums.pelicanparts.com/showthread....alsa+shift+knob

here a pic/sale
http://www.tremotorsports.com/product.cfm?Node=10299
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Spoke
post Jan 16 2009, 02:28 PM
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Zach,

If you make a couple, I'll take one. I have a shifter for the red car that doesn't have a knob. Those 917 knobs look cool.

Spoke
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dr914@autoatlanta.com
post Jan 16 2009, 02:53 PM
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I do not know how to down load the image from my e mail! Sorry Jason is not here today so I need some help
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r_towle
post Jan 16 2009, 03:52 PM
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QUOTE(dr914@autoatlanta.com @ Jan 16 2009, 03:53 PM) *

I do not know how to down load the image from my e mail! Sorry Jason is not here today so I need some help

Open email.
Look at picture
Hover mouse on top of picture.
RIGHT click once on the mouse as its on top of the picture.
Left click, save attachment
Save the picture to /mydocument/pictures
Now you have it.

Rich
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r_towle
post Jan 16 2009, 03:52 PM
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like this


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r_towle
post Jan 16 2009, 03:55 PM
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Maple and mahogany.
1/8 inch maple
1/4 inch mahogany.

Hint.
Make a long laminated glue up that is 1.5 wide (if thats the width) and 2 feet long..
After its dry, cut a bunch of square blanks for the lathe process.

Another hunt for the learning curve
Go buy a fugly cutting board at a kitchen store made from these two woods, maple and mahogany
Cut a few square blanks and turn up a few practise knows to get a feel for how fast you can cut, how to mount it etc etc.

You will end up using a custom made deadman for the non driven side of the knob...not the pin it comes with.
You turn that up out of rock maple or any super hard wood..rock maple is easier to find.
It will be shaped like a cup, but very shallow to give you room to work.
Use soap to keep it from burning.


Rich
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VaccaRabite
post Jan 16 2009, 05:30 PM
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As I don't have a plane or a bandsaw to make the thick boards thinner, where can I find mahogany and maple in 1/8 and 1/4 inch thicknesses?

Its easy in balsa or pine, but I was unable to find it in other woods.

Zach
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scotty b
post Jan 16 2009, 05:37 PM
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QUOTE(Vacca Rabite @ Jan 16 2009, 03:30 PM) *

As I don't have a plane or a bandsaw to make the thick boards thinner, where can I find mahogany and maple in 1/8 and 1/4 inch thicknesses?

Its easy in balsa or pine, but I was unable to find it in other woods.

Zach



My dad does abunch of woodworking, If you want some catalogs let me know. He gets woodworking crap as often as I get car crap.


http://www.woodcraft.com/depts.aspx?deptid...amp;topnav=true
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jimkelly
post Jan 16 2009, 05:56 PM
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here she is



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scotty b
post Jan 16 2009, 06:01 PM
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QUOTE(jimkelly @ Jan 16 2009, 03:56 PM) *

here she is



(IMG:style_emoticons/default/blink.gif) Um no. Bad monkey, bad. Go to your poop box and think about what you have done. (IMG:style_emoticons/default/mad.gif)
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