Caterham CSR Trackday toy

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...

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...

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 sol...

For a couple of years ago I bought Powerflex polyurethane bushes and replaced the rubber bushes in the front suspension. I was never real...

My engine has been a bit "moody" when idling. It can idle smooth, and then suddenly change idling speed. Some of the dash gauges h...

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...

Intake temperature has a direct correlation with engine power. For every 10°C rise in air intake temperature, engine power will be reduced...

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...

Does an airfoil generate downforce when placed behind a roll cage? Since I'm starting to get along with the CFD analysis software I d...

Some time ago I started to do some CFD analysis to see if I could do any simple changes that improved the aerodynamic properties of th...

The yearly MOT was a bit different. First attempt they refused to inspect the car as the guy said he'd not manage to get into the car...

At 137 km/h coming into a long right turn, my inner rear wheel fell off. A loud clonk and I could see how the inner rear wheel was bypas...

New 13" rims from Force Racing, 7" and 9" wide with brand new Dunlop slicks - "stickers". I bought the rims di...

My gearbox failed with a bang on on the King of Mantorp TA-event . Totally unexpected on the day's last cooldown lap. Looking at the ...

Valtonen Motorsport RX-8 Normally I don't like to compete but somehow I participated a Time Attack competition this weekend. S...

The Pipercross airbox I bough was supplied with a built in air-filter rated up to 200 hp. As don't want to strangle my engine I now...

As I previously wrote my noise levels are now down to 94-96 dbA on the intake side and 101 dbA on the exhaust side. In an attempt to re...

As I wrote in the previous post the track noise regulations in Sweden has become much harder lately. The current limit is 95 dBA drive-by...

The track noise regulations in Sweden has become much harder lately. The current limit is 95 dBA drive by measured from a 10 m distance. ...

I more or less gave up on my CFD simulations . At least for a while. I could not get consistent results and the obstacles were just too many...

After some vacation reading of the book " Race car aerodynamics " I have had lots of thoughts of how to improve the car's a...