Pushrod strain gauges
As I have a thing for measuring things, this summer I did an attempt to put a strain gauge on one of the push rods. A strain gauge is like a thin film with an embedded wire. You can glue it on objects and when…
12 ENTRIES / 2015
Caterham CSR Trackday toy: 2015
Trackdays, workshop projects and updates from 2015.
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New LSD from Titan
My car was fitted with a limited slip differential when I bought it. I've never known what kind of LSD I had, and I've never had any problems with it. One time long ago I asked Caterham what type it was and…
Rear wheel bearings
I was told the bearings had this number printed on it: "4EO 407 625 A SKF BAF-0076 C ITALY A 23 3 3347". Which after some Google magic indicated they originally belong to an Audi A6C6 2,0 T / 2,4 / 3,0. For us…
Unsprung weight
In order to get an estimate of the chassis unsprung weight, I weighted some parts. First I tried to put the wheel on a scale with the push rod disconnected but the result was a bit off (~18kg for the fronts).…
3D printed GoPro mount
I've tried various generic GoPro mounts over the years but they all have had problems with vibrations and wind in high speeds, and I've always ended up with securing the camera around the roll bar with…
Bronze bushing
Another try with the front lower rear a-frame bush. Now in oil filled bronze bush, thrust washers and a custom made crush tube. This solution feels rock solid without any play at all! Ahhh inner peace,…
3D-printed moulds for polyurethane bushes
For a couple of years ago I bought Powerflex polyurethane bushes and replaced the rubber bushes in the front suspension. I was never really satisfied with the small bush in the lower rear a-arm as it felt like…
Bad earth troubleshooting
My engine has been a bit "moody" when idling. It can idle smooth, and then suddenly change idling speed. Some of the dash gauges has also been flickering a bit. It haven't bothered me much but today I took my…
Custom moulded ear plugs
I hate ear plugs. The sensation of being inside a bubble playing a video game has got me avoid them except when using power tools in the garage. I ride a motorbike to work everyday, and now when I'm getting…
3D printed cold air intake
Intake temperature has a direct correlation with engine power. For every 10°C rise in air intake temperature, engine power will be reduced by 2%. Last season I logged intake temperatures over 40°C on a 20°C…
Rear bump steer
Bump/roll steer check on the rears for the first time, using a laser level on the brake disc and a mirror. I don't know why I haven't done this before. It turned out they (the rears) had quite a lot of toe in…
Airfoil behind roll cage CFD analysis
Does an airfoil generate downforce when placed behind a roll cage? Since I'm starting to get along with the CFD analysis software I did some more simulations. The airfoil is a NACA 2312 at 160 km/h with 20°…