Welding Practice Kart

This is a simple electric go kart I decided to build in 2015-2016 because I wanted welding practice. There isn't too much work done into car kinematics, since even a sloppy driving go kart is fun. The external dimensions are constrained by what fits in the trunk of my car after mind disassembly. The kart went from design to finished over the course of eight months working on and off.

Final CAD model

Trying to work out how long to make it.

I used a comically oversized brushless motor (Motenergy ME4201) with a very capable motor controller (Kelly KLS7218S), then connected it to three low current (but high capacity) batteries (14 V, 47 A-h lithium ion). The batteries were free, so there's that. 

Test fitting frame pieces. All made of 1/8" wall 1" square tube for ease of fabrication.

Making steering knuckles.

First welds. Because I'm a masochist I decided to TIG everything.

Seat and motor mount.

Steering knuckles and brake disks.

Rolling chassis.

Pretty alright welds.

Welds that could use some work.

Rolling with steering.

Wiring done. Crimped connections are so nice.

Done. Note the individually controlled front brakes. If you're a hotshot you can do brake vectoring.

Flat packed so it can barely fit in my car

Toyota 1984 22R-E Vacuum Line Diagram

Click to enlarge.

This is the emissions vacuum line diagram for the 22R-E engine. This particular year, 1984, has slightly different components than previous years, but is also not quite the fully redesigned 22R-E of later years, which have only three ports on the intake body. One easy way to tell is the 1984 model has only one bimetallic vacuum switching valve (BVSV), located on the intake manifold under a coolant hose. Earlier years have two BVSV valves. The vacuum transmitting valve (VTV) is likely the same flow rate as previous valves, that is type BROWN (400 cc/min). It opens to atmosphere.