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:
Loving the new Harness design software! It looks like madness in this view but it creates a superb spreadsheet with everything documented, each individual component detailed and you can build a parts list, costings and everything. So much easier than trying to build this in a spreadsheet. This is the whole ECU / Engine harness for a competition car, drawn in less than 2 hours.
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!
