got a ODB2 reader, car has CEL sometimes especially after racing, the code is P0420 Catalyst System Efficiency Below Threshold (Bank 1)
It is probably my high flow catalytic convertor is not doing its job (that's good, but the more it is doing its job, the slower my car is)
I am using metallic catalytic convertor, so it can withstand high temperature..and this code does not happen very often, so I can live with it
The OBD2 reader can also check the voltage of the battery, so it gives me signs when to change, currently reading at 12.1 V when the engine is off, not sure whether this is normal voltage..
Also some temperature reading after cool down lap
Front brake disc: 330C(626F), probably around 380C (716F) during racing, no brake fluid is able to withstand this temperature, the one I am using only supports up to 600F (315C)
Rear Brake disc: 99C (210F), so cold!!!
Front tyre outer: 55C
Front tyre inner: 59C
Rear tyre outer: 39C very cold!!!
Rear tyre inner 42C very cold!!!
Air Temperature is around 20C, track is 80% dry, 20% wet..
Tyre is Toyo R888 Semis
Wet Track is very tricky to drive, I have lost control few times... the sudden transition from dry to wet just unsettle the car too much and cause the rear end spun.. Semis is really slippery!!!
Once I lift off my throttle, the car spun at 100km/h straight away, this is due to the rear sway bar being too thick in the wet, but it is excellent for the dry because the lift off oversteer will help entering a corner. I have used VSC (stability control) to keep me in the track...
Some part is more wet than the others, some is dry, the sudden transition of different grip level is too dangerous, I remembered in street driving in Sydney, I am doing a 100km/h in Warringah Road near Chatswood in http://maps.google.com/maps?q=Chatswood+NSW,+Australia&hl=en&ll=-33.772405,151.204748&spn=0.02465,0.05918&sll=37.0625,-95.677068&sspn=47.483365,121.201172&oq=chats&t=m&hnear=Chatswood+New+South+Wales,+Australia&z=15&layer=c&cbll=-33.772553,151.204218&panoid=4mqaZ0iFcbEhpB5wm9VHIQ&cbp=12,27.89,,0,11.19, there is a pool of water on the left, my car went on top on it and my car "floated" to the right !!
This gives me a hint of how to do the long sweeping in Winton, my car should be set up not to spin in that corner when my foot is left off the gas