September 15, 2014
While spending the afternoon at Ferrari Racing Days with ff Corse I thought it would be a good opportunity to see some of the details on the Challenge cars. They have been developed over so many years and across numerous models that you’d expect them to be pretty well proven.
A splitter is something I’m very keen on making soon as it’s one of the few steps I can take to improve frontal grip.
The splitter on the 458 Challenge is this carbon fibre skinned sandwich roughly 12mm thick. The “aesthetic” part of the splitter, which also formed the air dam, sat on top a plain carbon aramid panel that formed the rest of the front underbody. It was interesting to see that the front underbody/splitter was the only aramid fibre I could see on the car.
2 canards were riveted to each side of the bumper.
Recessed mounting points and venturi tunnels in front of each wheel well can also be seen.
August 30, 2014
A couple of friends and I have now begun our own bike vs. car battle. Donington is the first track that we’ve now all run on, and I’m sorry to say the car is loosing.
I went to catch up with them at their track day and take some pics; Archie in his menacing Aprilia Tuono did an awesome 1:55 on the full GP Circuit. We caught up later on and compared GoPro videos side by side; we’re neck and neck until the start of the back straight, then he leaves me standing on the straight and Melbourne loop with the increased power to weight.
Mike did a respectful 2:09 in his Daytona 675, so with a 2:06 I’m right between them.
Cadwell is coming soon.
May 18, 2014
On the 8th of May I headed down to Donington for a 3 hour open pit lane session. Since the last track day at Donington in December a few changes have been done to the car; suspension and wheels.
Replaced the standard shocks with HSD Dualtechs, which come with 8 and 6kg/mm front and rear respectively. I also have Driftworks adjustable rear camber and toe links, but I have yet to fit them.
I also swapped the standard wheels for some RAYS Gram Lights 57C in 18″ x 8.5″ ET30 all round. The perfect width for running wider tyres while not over-killing when still running stockish power. I fitted 10mm hubcentric spacers at the front with longer studs to clear the dampers, a common problem even on standard wheels due to the larger diameter damper/spring.
The tyres mounted for the track day were well worn Pirelli PZero Rosso in 245/40. With the lack of tread I struggled a bit early on with a damp track but as soon as it dried up they performed well.
25mm fibreglass fenders give clearance to the tyres in the all suspension and steering travel.
Before heading to the track day I corner weighed the car again to see how things had shifted after the modifications. After having problems with the Micra battery during the cold winter I fitted the original in the boot on the passenger’s side. I also removed the rear seats.
FL 332.0 FR 350.5
RL 311.0 RR 283.0
Total: 1276.5 kg (wet weight – full fuel tank)
Before: 1264.5 kg with 3/4 tank. So with the increase in wheel and tyre mass, larger battery, fibreglass wings and no rear seats the weight has remained pretty much the same when you take into account the different fuel loads.
With the repositioning of masses in the car the weight distribution has shifted from 55.6/44.4 f/r to 53.5/46.5, although again with different fuel loads its hard to compare.
Camber was measured at around 3.25deg and 2.75deg front and rear. A little much in the damp due to the reduced roll when cornering but felt much better in the dry.
The open pit lane was great to experience as it gave you the opportunity to run for extended periods of time (a few red flags did occur though) with my longest session being over 50 minutes non-stop. This was also after the track had dried up and the brakes showed no sign of fading and the temperatures were perfect. The rear pads were finished by the end though, lasting only 4800 miles; EBC Green Stuff.
Fastest lap of the day was 2:06.69. The added Melbourne loop of the GP circuit was great to run as the chicane and 2 hairpins are awesome. The event went on until 8:30pm and it was great to finish off the day under setting sun.