Foam bumper on Mardave

[Karl Dransfield]

Quite a few people now have asked me what the bumper I use on my car is. So I thought I'd post it on here to make it easier I use the whole front bumper assembly from an xray T3.

Bumper fitted to car:



The parts required are:

xray 301223 (foam bumper)
xray 301202 (lower bumper plate)
xray 301324 (body posts)
xray 301213 (graphite upper bumper holder.
A cheaper plastic version of this part is available too.)

Parts laid out - note that the lower bumper plate is one I made myself out of a piece of carbon, but is exactly the same as the xray one.



The underside of the lower bumper plate is recessed to fit around the narrow front of the t3 chassis, and as a result is not flat. This recess needs sanding off so it is flat.

If the bumper is being fitted to a ce chassis, the upper plate needs two grooves dremeling into it to accomodate the bumper support posts as shown:



The only other modification that needs doing is two 3mm holes need drilling in the front of the chassis to mount the bumper like so:



Then just slide the bumper over the mounts and fix with the top plate.



I've used this setup for about 18 months now and have never replaced any of the parts. It's solid and protects the shell well too.

Hope this helps

Karl

[Aaron w]

Not bumper related, are you running a different front plate?

[ch!3f]

there is a guy on ebay selling them for about 25quid

[Karl Dransfield]

Originally Posted by Aaron w

Not bumper related, are you running a different front plate?

It's just the mardave carbon front plate.

[Aaron w]

Just wondered as your front looks narrower than mine. My carbon front plate only has wheel base adjustment not front width adjustment.

[Karl Dransfield]

Nope, mine has track width adjustment as well Running on the outer holes makes the car too wide though. So I always run on the inner holes.

[Aaron w]

Is your cf plate the same as your original ce plate? Mine isn't, I am getting slow speed grip roll, so want to make it narrower. But don't wana run the ce plate on the cf chassis, looks wrong.

[Karl Dransfield]

Yeah my carbon plate has the holes drilled in the exact same place as the standard ce plate. Changing the front track width actually makes very little difference. If you have grip roll issues, this is most likely down to tyre choice.

[Aaron w]

I was running contact 50's. Also tried japs as i used to run them on the old alloy chassis but still had the same issue. So want to get the front width as close to the alloy chassis width as this is the only difference.

[Karl Dransfield]

Originally Posted by Aaron w

I was running contact 50's. Also tried japs as i used to run them on the old alloy chassis but still had the same issue. So want to get the front width as close to the alloy chassis width as this is the only difference.

Many people have found that with the ce chassis, they have to go to harder compound front tyres. I run 50's or 52's on the front of mine. Never a hint of grip roll no matter what the track width. Harder front springs would definitely help too.