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:
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.
The next challenge (whilst waiting for parts to finish the current job). ECU swap in a forest rally car. It's going from MBE967E to a DTA T12+ with paddle shift . It could do with a full rewire but time is tight so the ECU is going to have to plug into the existing wiring which is a touch complex!!
You can never do too much training!
Well it runs. Once the crank timing was setup, it fired first time and isn't too rough on the base map. It even idles although the IACV needs setting up properly. The fuel pump is noisy as hell but fuel pressure looks good. Time to bolt all the bits back on and clip the engine harness tidily.
I am going in circles here counting teeth 🙂 I'm in the process of setting up the timing on this Mazda NB turbo car on a Motorsport Electronics ME360 ECU. This is supposed to be plug and play but the custom crank sensor setup doesn't want to play! The setup is pretty simple although space is tight! The MEITU software is really good (with a comprehensive help section!). Unfortunately, my 'trusty' old timing light has decided it doesn't want to work so I'll have to wait for a new one in the post before I can get this running.
It's great to be able to design and make stuff in house. Whilst this is a simple bracket it does move me forward on this job (with man flu!) It's a simple steering wheel plate for switches and rotary knobs. I 2d scanned the steering wheel to get the profile of the spokes, imported that into CAD to create the right shape for the backplate and then created the GCode for the CNC machine. This has been made in 6mm ABS which may be a bit OTT but it's strong! I haven't received the rotary knobs yet (boost, map, rear diff and a spare) so marked up the rear of the bracket ready to create the correct size holes.
Interesting end to the year - I've been asked to quote for wiring a MEV Rocket - it's an exoskeletal kit car, fitted with a Duratec V6. Possible ECUs are Emerald K6 (although by the time you've added an external wideband controller and bits the price does rise and there's no knock measurement) or my current go to, a Motorsport Electronics ME360 https://motorsport-electronics.co.uk/product-category/wire-in-ecus/me360-wire-in-ecus/ Dash options are numerous (needs to be road legal) but my recommendation is for a Race Technology Dash 2 https://race-technology.com/gb/racing/displays/dash2 Switchgear and wiring has to be IVA compliant so quite a challenge.
Boxing Day ECU setup on a client's Mazda powered kit car. The Motorsport Electronics software is very good and I'm liking the ability to test outputs from the laptop. Once it's all setup, it will be startup time - probably next week though as I want Motorsport Electronics to 'dial in' just to check settings are all ok. This is a 'plug and play' setup specifically for this engine so should be spot on (although it certainly didn't 'plug'!
I've got a few of these budget LED front 'spot' light kits in stock. I've got one on our van and, whilst the lighting isn't very directional, there is a lot of light! Great for main beam! So, if you fancy some upgraded lighting, let me know. These are great on vans, pickups etc and also OK on road cars! Christmas Deal - fitted from £160 (cash deal).
