Vintage modern Kart Build

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Have been wanting to build an old school chassis with some parts I've had laying around.
 

Attachments

  • JKR MFJ 3.jpg
    JKR MFJ 3.jpg
    3.3 MB · Views: 35
  • JKR MFJ 4.jpg
    JKR MFJ 4.jpg
    3.4 MB · Views: 32
  • JKR MFJ 5.jpg
    JKR MFJ 5.jpg
    3.2 MB · Views: 29
  • JKR MFJ 6.jpg
    JKR MFJ 6.jpg
    3 MB · Views: 28
  • JKR MFJ 7.jpg
    JKR MFJ 7.jpg
    3 MB · Views: 32
  • JKR MFJ 12.jpg
    JKR MFJ 12.jpg
    3.3 MB · Views: 31
  • JKR MFJ 14.jpg
    JKR MFJ 14.jpg
    2.9 MB · Views: 34
  • JKR MFJ 15.jpg
    JKR MFJ 15.jpg
    3 MB · Views: 30
  • JKR MFJ 17.jpg
    JKR MFJ 17.jpg
    3.3 MB · Views: 39

madprofessor

"Loose Cannon Creations"
Messages
2,899
Reaction score
888
Location
Jacksonville, Florida
That's a truly great looking shop, big fan of the kitchen cabinetry, above and below. Brake press, hydraulic press, all easy to see, but what kind of cutting plotter is that? Plasma table? Laser?
 

madprofessor

"Loose Cannon Creations"
Messages
2,899
Reaction score
888
Location
Jacksonville, Florida
it’s not his garage. It’s his kitchen!
Might as well be, he's cooking up a great start on what looks like it'll be a nice kart. The upper cabinet cutouts for a fridge and a stove hood are obvious, but so is the rollup garage door.
Smooth, how did you come to end up with all that kitchen cabinetry in a great big garage? I built some into my past garage, but nothing near as complete or nice as yours.
 

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Well Mad cabinets came from a manufactured home that was being remodeled and where I live use to be a retirement community with large lots and boat and RV garages.
 

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Got steering cut down, milled and tapped, made a quick jig for spindles to set arms 105%
 

Attachments

  • 20211015_100236.jpg
    20211015_100236.jpg
    1 MB · Views: 16
  • 20211015_100325.jpg
    20211015_100325.jpg
    2.9 MB · Views: 14
  • 20211015_100614.jpg
    20211015_100614.jpg
    3.1 MB · Views: 16
  • 20211015_100658.jpg
    20211015_100658.jpg
    3.1 MB · Views: 15

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Mock up of steering and motor
 

Attachments

  • 20211015_161111.jpg
    20211015_161111.jpg
    3.4 MB · Views: 27
  • 20211015_161126.jpg
    20211015_161126.jpg
    3.6 MB · Views: 25
  • 20211015_161142.jpg
    20211015_161142.jpg
    3.4 MB · Views: 18
  • 20211015_161154.jpg
    20211015_161154.jpg
    2.6 MB · Views: 27
  • 20211015_161245.jpg
    20211015_161245.jpg
    2.8 MB · Views: 33
  • 20211015_161300.jpg
    20211015_161300.jpg
    3 MB · Views: 33

madprofessor

"Loose Cannon Creations"
Messages
2,899
Reaction score
888
Location
Jacksonville, Florida
Really trying to understand what's in the pics, I promise. Oh, and that's fantastic that you can mill your own parts!
Guessing 105 degrees means the spindle arms are 15 degrees away from being a right angle, at least that's about what it looks like. However, while being leading arm spindles (forward of the kingpin bolt) they appear to be pointing inward instead of outward. At 15 degrees that would be extreme reverse ackermann angle.
Trying to wrap my head around the geometry, but no matter how my mind sees it there's still extreme scrubbing and pushing in a turn. Please don't take any of this as criticism.............Zero ackermann angle would (with the wheels pointed straight ahead) have a spindle arm's tierod connection and the spindle's kingpin bolt being in a straight line with the exact center of the rear axle (you stretch a string tight across it all). With leading arm spindles (like yours) the arms would be pointing outward. With trailing arm spindles (opposite of yours) the arms would be pointing inward.
Please tell me if this reverse setup would work, and I'm just unable to picture it. I'll believe you, since I can't trust my spatial grasp anymore.
 

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Yes this set up works great in the soft sand and dirt that around me. I find with the arms behind link pins it pushes,scrubs or slides more in the turns I guess what I'm trying to say the outer wheel feels like it bites more, that just what i found works for me. Its a great question
 

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Well explaining this in detail could take a bit, so I’ll give you my short version. First the simple karts that I’ve built for grand kids are driven on dirt and sandy roads, there is no camber or caster or suspension built in. second I like using the china 110cc motors which seems to make a little more torque and power, so in the dirt I seen the kart are sideways most of the time, its fun when you can drift corners anyway moved to parallel steering with slight toe out, made front wheel base wider you know the normal steps for this. so with anti ackermann the tire slip angle on outside wheel on my carts was greatly helping control the *** end come around in turns. There a lot of info on this subject and arguments to be made along with it. But its fun to experiment and learn new things I do a lot of reading and by no means an automotive engineer, anyway thanks love the feed back on the Kart.
 
Last edited:

smoothimage

New member
Messages
15
Reaction score
6
Location
Fort Mohave, AZ
Note: yes I know most off road cars ,karts, buggy's, use more standard or pro ackermann, but it works for my application.This video
shows some good points
 
Last edited:

madprofessor

"Loose Cannon Creations"
Messages
2,899
Reaction score
888
Location
Jacksonville, Florida
Don't know about others, but the reverse ackermann question fascinates me. I'm going to research that geometry and get myself an answer, have no choice, it'll drive me nuts if I don't.
 

COB619

New member
Messages
18
Reaction score
13
Location
San Diego
It’s hard to tell from the pics but just wondering about the rack and pinion set up. Mine looks similar and the first time it was mounted it would turn the tires in the wrong direction so I had to flip it around. Sweet build wish I had a bender!
 

madprofessor

"Loose Cannon Creations"
Messages
2,899
Reaction score
888
Location
Jacksonville, Florida
mounted it would turn the tires in the wrong direction
I see that too COB. My eye is saying it's backwards in the pics with the steering shaft on top of the rack, but only needs to be rolled over 180 to put the steering shaft on the bottom and make it work correctly.
Is that right, smooth?
 

Denny

Canned Monster
Messages
8,231
Reaction score
4,456
Location
Mayberry, Indiana
Anti Ackerman is only good on soft dirt or mud. It is where the outside tire is the only front tire biting into the surface to steer the kart. Will not induce over steer to bring the but of the kart around.
 
Top