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.
Corner weighed the car to get a baseline stock weight and distribution. 1264.5 kg with a 3/4 full tank.
December 30, 2013
Had my first track day in the 200SX a couple of weeks ago at Donington Park circuit. The track day was held on the National track configuration, which is generally used in BTCC and small cc formula series.
In preparation for the track day I replaced the front brake discs and pads, and brake fluid. A must for the track day as the previous set up would fade within 5 minutes of spirited driving.
Went for Ferodo’s proven DS2500 pads and Nitrac grooved discs. Brake fluid is Castrol Performance DOT 4.
Other modifications that I’ve carried out but haven’t mentioned previously are an ebay special FMIC and an Apex Performance Manual Boost Controller running at 10psi. Power must be slightly improved as it tops out at 152mph over the standard 142mph.
The tyres for the day were recently fitted Bridgestone Turanza T001; an economic tyre I had fitted before I got a second car for commuting.
The track day consisted of six 20 minute sessions throughout the day. Only the novice group had free spaces available at the time so traffic did become an issue in some of the sessions, as you could only overtake on the left hand side. Despite the nice weather the track was still damp in the morning sessions but it dried up by lunchtime. The car was incredibly easy to drive, very balanced with only a hint of understeer. The brakes also showed no signs of fade, although the sessions were relatively short.
The GoPro ran out of juice for the last sessions so I could not measure the lap times, but the fastest lap measured was in the 5th session and was a 1:34.40.
Power: ≈200 hp (FMIC, MBC, de-cat)
Weight: 1264.5 kg (Wet, ¾ tank, no weight reduction)
Tyres: Bridgestone Turanza T001 205/55/R16
Brakes: F – Ferodo DS2500, R – EBC Green Stuff
Thanks to Matthew Griffiths for the photos and GoPro loan.