Please see the preparation guide below.
1. Buy a BMW E30
The BMW E30 is the boxy 3-series from the late-eighties. In order to fit a suitable roll-cage you should ideally be looking at 2-door coupe models, although 4-door and touring versions are allowed. There are two allowed models:
2. Get your car checked over
Before you go spending a lot of money on parts and labour, get your car properly checked over by a specialist and solve any immediate problems. Most cars are also going to need some TLC in the form of a full service.
3. Order your safety equipment and performance parts
Some of the kit can take a long time to arrive so order it now before starting work on the car. You will need the following safety equipment:
You will want the following performance parts:
4. Strip out the interior
To remove fire hazards and a lot of weight, remove as much of the interior as possible. Refer to the series regulations for exact details, but in brief:
You can remove:
You may not remove:
5. Fit the roll cage
This is where it gets tricky (for those DIY-ing). If you have a sunroof then the interior sunroof cage will need to be removed and some surgery required to the roof in order to get the rear cage in the car. There may also be some fettling required to fitting plates and brackets in order to get the cage to fit perfectly. Beyond the sunroof modifications, this is best left to a professional.
6. Fit your safety equipment
If you ordered your rollcage with a harness bar, this is the best place to attach your shoulder belts. Otherwise weld-in plates housing eyebolts on the rear bulkhead is another option. One of the lapbelts can use the original seatbelt mounting point but the other, as well as the crotch straps require a hole to be drilled so that an eyebolt can be screwed into a spreader plate below the car.
If your seat is base mounted and comes with a subframe then fitting is a simple spanner job. Side mounted seats may need further drilling of the bodyshell.
The fire extinguisher and safety cutoff switch should be fitted by a professional.
7. Fit your performance parts
Get the brakes and suspension race-ready. A Haynes manual may come in useful! The driver information pack is also worth a read if you are starting out.