Welcome to the Carreg Motorsport web site. My aim is to provide quality motorsport electrical services to the club competitor.
My work is aimed fully at the club level competitor so if you’re looking for a WRC or F1 wiring harness, or the headlights fixing on your Mondeo then I’m not for you (but can recommend companies at each end of the spectrum). However, if you need custom wiring work , from an experienced ‘tech’ with decades of motorsport experience (as a competitor and car builder), then please look at the services I provide.
I work from a small unit near Llanelli but I’m happy to travel for small jobs. I also have a well equipped workshop at home (with a lift) so can handle most work effectively. Here’s what I’ve been doing recently:
It's the small things that make a big difference. Managed to get the new lock and box on the door today thanks to the welding skills of another Motorsport company 50 yards away. The old bolt and padlock were rubbish, looked like I welded them, and the bit on the frame came off with a good clout 😩 The doors on this place are typical MOD and are all steel and super thick. I feel more comfortable now!
Had this Clio back to configure the launch control and repair damaged wiring to a sensor. All went fine but when I ran it up to temperature there was a coolant leak! It was a mad panic to get it sorted before the owner picked it up, which meant stripping off the front panel, air filter and lifting the rad. Hopefully it's now ok but we will be parked near the car at Loton Park Hillclimb on the weekend so able to assist if there are any problems.
Great to see the logo on two cars at Gurston Down this weekend. Both going extremely quickly too! We're back out in the Clio in a fortnight at Loton Park (first time for us). Over the next two weeks, I've some work to do on the Harlow Clio (minor snagging and setup the launch control), finish a kit car (all done just need to bolt it back together and mess around with the base map to get it to run a bit better), sort out a Micra rally car that won't start, plan a new engine and chassis harness on a Mini R53 rally car and start the move to a new unit.
The Clio Cup Hillclimb car is still a challenge! The ECU went back to DTAFast for a repair (turned around and back immediately) and on stripping things down I found this split coil pack. It's a bit of a chicken and egg situation - did a defective coil pack cause the ignition driver failure or the other way around? That's not important now - the car is due to be on the rolling road on Thursday and competing on Saturday! The ECU is triggering as it should, on the bench and in the car and I have a new, OEM coil-pack to collect in the morning. So, everything should be good to go tomorrow.
Stunning! Disappointed to see the DNF (half shaft failure I think) but it's clear that the car and crew are phenomenally quick !
I needed a dash warning light for when Launch control is enabled on this Hillclimb and sprint car but didn't want to mess up the clean look. So the unused engine warning light is now in use! The launch button is too far from the outer parts of the wheel so I'll be making a new bracket to relocate it.
Nice to get a mention! It's been hard work but an absolute pleasure working on this rally car. Chris and the team have built an extremely quick rally car with a stunning engine and huge power; to see it running yesterday was great. To top it all, I had a run in the passenger seat over the stage at Sweet Lamb right at the end of the day!
This club spec relay / fuse harness is almost finished (needs a couple of connectors, wrapping and testing) and then will be ready for fitting to a lovely Hillclimb / Sprint Clio. I'm not sure about the 2.8mm multipin connector for the dash but that's what it came with! It'll be OK for testing but maybe I'll swap in a Deutsch DTM for that.
It's great when everything comes together. Here's the throttle blipper and paddle shift working on a high-spec forest rally car running a DTAFast T12 ECU. The car is ready to start on a base map. Once it's running all the new wiring will be clipped up behind the dash, everything I've not touched will be checked just in case I've uncovered (created!) any faults in the days I've spent behind the dash! Then it should be ready for mapping
Back working on this this afternoon. Just finishing off the new chassis harness. There's a little bit of snagging (stalks for dip and main beam ground the relays but I've got them setup for a positive trigger - easy enough fix). Indicators are super fast as they are all LED and the flasher unit is old school. I'll either change the flasher unit or pop some resistors in somewhere.
It might look chaotic but it all works 🙂 I've just bench tested the DTAFast T12 ECU with bespoke engine and chassis harnesses. Everything was spot on although I did have a small wobble with the fan relay not turning off - then I realised that without a coolant sensor in place, the ECU assumes a high engine temperature (above the threshold for the fan). A little bit of juggling in the software and all was good. Next job is to fit this to the car and build the gearbox and paddle shift wiring.
I have to say this @DTA ECU is rammed with features. And being so complex, it's a lot easier to configure it on the bench, not while sat in a (cold) workshop! The configuration should be finished tonight then it'll be plugged into the new wiring harness and all bench tested before installation on the car and first start up.
