To stop the bottom of the engine, the steering rack, pipes and other show stopping items getting damaged, or more probably ripped off on stage, we fit a sumpguard. It is essentially just a piece of alumnium thick enough to withstand likely impacts. Thicker means stronger, but also means weight, so you have to make a call. WRC boys use carbon, or carbon kevlar, but then £s means a lot less to them than to the average clubman rally driver.
Mounting it is always a challenge, easy to remove, yet strong enough to take the weight of the car, the mounts must transfer load, yet not buckle the chassis if you drive over a rock.
We decided to make ours quick release. As you will see in the accompanying photos the back has two brackets which sit over the “X” brace, and the front locates on the frame we made, secured by two lynch pins. To remove sumpguard, extract lynch pins and push sumpguard back, gracity does the rest. To put back on lie under car with rear of sumpguard on knees. Locate rear brackets, lift front, insert lynch pins.
We made the front bracket using a piece of unequal angle. In a standard car there is a piece of tin across here to keep the chassis legs the correct distance apart, but we needed something bigger, and also somewhere to hang the oil cooler, and mount the sumpguard from. In the end it also works quite well as an attachement point for the tow eye. We drilled out the studs that were on the front of the chassis legs and made up some decent backing plates for the bolts.
The unequal angle had to be modified around the bumper mounts.
- New, shiny and not covered in grott
- Nor gouged out after a few run in’s with stage scenery.
- Making a wooden mock-up for shape
- Alumium joiners allow for adapting the angle of the bend easily.
- We had to make a stiffer model to get the height of the rear spacers correct.
- After one event, still looks OK. The front has been drilled for the lynch pins.
- One of the rear brackets.
- Shows the angle of the bend.
- Front support bracket and lynch pin.
- Close up of the pin., To get more area to weld we ground slots in the vertical tube and welded them back up, and to the pin.
- Front support bracket.
- Rear mounting Brackets. Complete with grit from last event.
- Close up of one of the brackets.
- View on top showing how it sits against the support tube.
- Rear Brackets in position
- Front showing lynch pins.
- Had the front off for other mods, so repainted the crossmember. This shows better detail of the mounting
- Showing sump guard in place, with the front of the car removed.
- View of coolers, Power steering on the left, engine oil on the right.