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:
This car has challenged me from Day 1! So today I'm going through the setup again on the Motorsport Electronics Limited ME360 to make sure all is OK for it to run. The throttle position sensor is all configured and working well, showing voltage changes as expected. The 2D table / HRT shows everything as it should be, but I'm not getting a TPS percentage figure. It must be me doing something stupid but I can't see it!
Yet more Micra challenges. The O2/Lambda sensor was jammed against the engine mount (and yes the wiring was damaged) . There is no wonder this thing didn't run! I managed to remove the sensor (in bits) to fit a proper Bosch Wideband sensor but now have the dilemma of how to fit it. I have a 90 degree fitting but that won't wind in as it fouls the other downpipe. Looks like the manifold will need to come off 🙁
Great to finish (almost!) this today and pass it back to the owner. It's a replica of a 1931 Ford Model B I think. It's old school with a big V8 (with a distributor!) and classic gauges. But running it all is a Hardwire Electronics PDM25 (which will be hidden behind a panel). Big thanks to George at Hardwire for helping me out with a software glitch and some stupidity on my behalf on a Saturday! There are some other modern bits in there (LED rear lights, GPS speedo gizmo) and the PDM was the perfect choice to integrate these with the older stuff and classic switchgear. I'm waiting for the owner to fit the fuel tank and wiper motor (with its 7" wiper blade!) so I can finish off the wiring and setup. My unit looks like my toolbox has exploded so a tidy up is the Monday morning job!
Great to see some decent power from our Clio 197 RS yesterday at Mosley's Rolling Road & Garage Services.! The car is fitted with: DTAFastT4 ECU, Hardwire Electronics PDM28, Blink MarineCan keypad, and Race Technology Ltd Dash2 Pro (all connected over CANBus) . There's also a Jack Webb Motorsport LifePo battery and Cartek Motorsport Electronics battery isolator. There's not a lot of Renault electrics in there now 🙂 Dyno figures - https://docs.google.com/spreadsheets/d/e/2PACX-1vRIZ987znSulLHhOIRT_oo4iCVrjqkZN6Pd0EOO76JslWhvrZF5dgpn-Buc9xlkJNIvEJzUSPVLHBQm/pubchart?oid=36578149&format=interactive
This isn't what I usually do but it does take me back a few years to dashboards filled with 'clocks'. Not a digital dash or CANBus (well not quite true) in sight! As old school as this is and it suits the car perfectly, there will be a Hardwire Electronics PDM tucked up under the dash to control everything 🙂
The logging feature in the Hardwire PDMs is great for removing some of the guesswork in setting everything up. The graph is a log of the starter solenoid current and voltage on starting. The current peaks at just under 23 amps for about 20 milliseconds, then drops to around 7 amps after the solenoid has 'pulled in'. I can now set the 'fuses' appropriately (second picture). https://www.hardwire-electronics.co.uk/
People ask me why I advocate PDMs but don't have one in our race car! So here we go! It was always planned and the switch over from fuses and relays will be relatively easy as everything is documented. Hardwire PDM28 ( a bit over the top for this but plenty of room for expansion), DTAFast T4 ECU,and Race Technologyy Dash2 Pro. All British companies - trying to have as little French stuff on the Clio as possible 🙂
I managed to spend some time on this Micra today - the DTAFast T2 is in and mounted (I've left the harness long to make sure we have clearance around the heater) . The engine harness is in and just needs a couple of bits sorting (coil pack and grounds to the head). The next job will be to connect the ECU/Engine harness to the standard (modified) harness.
I've been quiet on the updates as we've been busy competing. The Clio 197 RS Cup went well at Pembrey Sprint on the weekend despite an 'incomplete' map.
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.
