August 2020
After two very slow timed runs, where the rear end was locking up going in to Oggies, I softened the rear ARB and added more front wing angle, and then went 3s faster putting me in to 2nd overall. I then improved again by 1s on T4, but Simon Wallis in the little 1070cc OMS 3000 had crept in front by .1s and for the next run I tried increasing the front wing angle and on the final run, the rear, but the last two runs were scrappy and I couldnt improve.
Opposite lock moment around Oggies, which was cured on the next run by softening the rear ARB
Big thanks to Fressingfield Oily Rag Club for an excellent event. One convoy, two practice, six timed runs and we were finished by 4pm! What incredible value for money.
Rounding Hamiltons at Snetterton. Photo Ken Carrington
I towed for 385miles over the two days, and I was very happy with the work that Triple M completed. The photos of the car now show that it sits level at speed, rather than nose up, and a fresh set of Ultrasofts on the front certainly helped with the grip. There is still some work to do, mostly to my driving, so I need to work on track positioning, brakes, and getting on the power coming out of the corners. The TC didnt kick in once, and I was struggling to get the power down. Even on the video below, exiting the hairpin on the 2nd lap, the rear tyres light up and I have to control wheelspin. Who's idea was it to go for 405lbft again LOL
25Aug
Fressingfield Oily Rag Club Sprint on Sunday
I have a last minute entry to the Javelin run Snetterton sprint on Sunday, having been on the reserves list for quite a while. On Saturday I'm taking the car over to Triple M for a chassis alignment and corner weights session, and at Snetterton I'll be working on the launch control, traction, wing angles and front and rear anti-roll bars, until I am happy with the way that the car is handling again. She now has 1300lb/in springs on the rear, which raises the wheel frequency from 3.1Hz to 3.3Hz, which is a step in the right direction, but things will need resetting again so Sunday will be a head down and focus kind of day.22Aug
Sensor brackets completed
The printed sensor brackets came out as good as I'd hoped. My isometric drawing allowed Andy to create a Fusion 360 model, which he then printed, and they arrived in the post on Tuesday. I had to open out the 18mm holes for the GT101 sensors, just a tad, with the 18mm drill, and then the sensors easily slotted in to place in the brackets. I've got some aluminium M6 x 35mm bolts on order, and with the titanium M6 nyloc nuts, the total weight should be minimal. I've installed Fusion 360 on my Desktop PC at home, and I'm watching various YT videos on how to use it, and I must say its quite intuitive to use. I now have my own CAD drawings of the Intrax damper spacers that I had machined a couple of years ago. My model now includes fillets and a smaller waist that should reduce their weight if I were to get them machined. I've also made a model of the Mygale camber shims that are used on the front and rear hubs. I do need to get some of these made, so I will find someone who can manufacture them for me from 1mm and 2mm aluminium. I mean you could print them in plastic, that might work.
The three printed brackets.
The GT101 sensor held in place by my bracket. The steel bolt and nuts will be replaced by aluminium ones, including the missing nut. The more pictures I see of the gearbox, the more I want to clean it again :D
17Aug
NSCC Blyton Sprint
I'm running at the NSCC Blyton sprint in September, not the Saturday on the eastern layout, but on the Sunday 18th on the full outer circuit layout. This will be a chance to test out the launch and traction with the modifications to the rear wheel speed sensors. I'll also work on dialling out the understeer from the front end.15Aug
Worlds fastest Mk1 Fiesta
Chris Todd broke in to the 8s at Santa Pod last weekend in his >700hp Mk1 Fiesta. Incredible.The worlds fastest Fiesta Mk1 :D
14Aug
XS608's replaced
Both of the XS608B rear wheel speed sensors are now replaced by GT101's and a 3D printed bracket is being produced that will affix both sensors to the gearbox. They seem far more tolerant of the difference in tooth height of the reluctance rings. I made a simple aluminium bracket to locate a sensor and then took a drawing from it, which has been turned in to a Fusion 360 CAD model for printing.
The sensor fitted using my 2mm aluminium bracket
The Fusion 360 rendered model, ready for printing
I used my logic probe to monitor the pulses from the sensor. Because they are both wired directly to the CAN based X10 Expander, the X10 doesnt produce the analogue voltage from the sensor, like the F88R ECU does with the front wheel speed sensors. The X10 simply produces a 'speed' which is sent over CAN to the ECU. So to test the sensor, a logic probe directly connected to the output from the sensor, will show the pulses generated as the reluctance ring passes the sensor head.
I've now set the front and rear wheel speed sensors to generate speed per pulse from the sensor, rather than per complete revolution of the wheel, which will produce more accurate launch and traction control.
8Aug
