Update# 10 - Donington Park - 16-9-2011
Unfortunately no pictures or video from this event. I normally take pics and turn on the camcorder post lunch break but I was a bit busy scratching my head at this particular point...
...Met Mike (+gf) just before 8:30am in garage #9 at Donington Park, pulling up just behind Jonny1*2's RB 182. Infact, it was an all-star Clio garage as next door (in the same garage space) was another 182, although I'm still not sure if they were from the forum. During the drivers briefing (just before the instructor delivers the same joke I have now heard 4 or 5 times) a big clap of thunder rattles through the paddock - then the heavens open and Donington is all of a sudden rather wet! Typical - just the weather for trying out our new chassis upgrades. To recap, we now have the following since our last outing at Oulton Park:
Whilteline adjustable rear ARB
Pure Motorposrt solid front top mounts and strut brace
Front toe set to 10` out
Rear ride height raised by approx 5mm
DS3000 pads runnning on Brembo HC disks
I hoped the above would help counter the understeer we previously experienced and also make the car a bit more playful at the same time. Mike took the initial sighting laps, which were done at around 30mph. I then had the car for the first proper session - track totally wet on start/finish straight, down the craner curves, old harpin before changing to greasy damp for schwanz and copice etc. It's without exaggeration that within 1 lap I knew that the above upgrades were worthwhile. The feel through the steering wheel had increased ten-fold since our last track day - I could feel exactly what the front wheels were doing, and more importantly when they were about to lose grip. Equally, when backing off the throttle slightly mid-turn the rear was definately more lively and I now found that we could use the throttle (aswell as the wheel) to change the line through the corner. Athough it was the first session (and people were rightly going slow) I felt pretty confident with the car - infact I think I passed about 10 cars in this opening session. I came back to the pits giggling and loved every second of that session
The rain had stopped now and Mike took the car out; we generally swap each session etc. I think (hope) Mike is as pleased as me with the car - although Mike was pretty quiet during the laps I'm sure I saw a smile or two emerging from his visor - hehe
My next session was completley dry. Oh my, this car now feels like a track car! Corner entry speeds are so much higher than before and its just so much more adjustable on the limit. I think the top mounts give you more feedback (and therefore more confidence) but the ARB makes more of an effect (even on soft setting). All in, the ARB and top mounts/brace cost us about £320. Personally, its the best money I have ever spent on a car and would highly recommend both components.:approve:
This is when our fortune changes. Mike driving (irrelevant) and coming down the straight where the Dunlop bridge used to be, in 4th @ at approx 7k revs. Brake very hard for chicane, exit on to start/finish straight. Ooops - the cabin has just filled with smoke. I thought cooked brakes first of all, then smelt oil. It soon cleared but we pootled back to the pits to see what had happened. Mike and Jonny1*2 spotted that the oil breather had popped off the head and a bit of oil had sprayed on to the 4-2-1 manifold. As there are no clips to hold this pipe on we thought "phew", cleaned it up and refitted the pipe.
It was now just before lunch and I was eager to take the car for a shakedown prior to the 1hr break. Jonny took shotgun for this session and the first lap seemed OK. During our first proper time braking into Redgate both Jonny and I noticed the exhaust pop a little (almost subconciously for me). When I applied the accelerator on corner exit the rear view mirror filled full of smoke. "Sh*t" - I think the engines gone pop. I pulled straight off the racing line but didnt have much choice of rolling down craners (due to traffic behind me). I pulled off immediately after the Old Hairpin and still remember now Jonny scrambling wih the harness release (thinking the car was on fire) - still makes me chuckle that :rasp:
We get towed back to the pits and the breather pipe is still in place. With the help of Jonny and Mick (from ???????? {thanks again}) we remove the airfilter to see that its wet with oil. Infact, some oil had passed through this and formed a shallow pool in the webbing of the lower airbox. Not much really but enough! I think this oil came through when the pipe popped off on the previous session. The smoke during my session was when the engine inhaled the oil left in the inlet tract. We removed the inlet manifold and inspected the plugs - as it was suggested that the lower piston rings may be letting oil through. All plugs were spotless and looked to be a good colour. So - why did the oil push the pipe off to begin with? Was it due to cornering and breaking very hard? For reference, the oil sits dead on dipstick max mark. The last thing that happened before the breather coming off was high revs (in 4th gear) then immediatley breaking hard for quite a long time. Could surge create pressure? - I dont know.
The airbox and rubber inlet elbow were cleaned and since that we havent seen a jot of smoke. We decided to not risk taking it back out on track though, just happy to get home in one piece etc.
We have now decided to run a catch tank to remove the chance of oil (and vapour) entering the inlet again. This turned up today (not bad for £25 delivered):
Here is a picture that I forgot to upload previously of the strut brace in place:
Our plan now is to just run it and see what happens. We hope that it was a freak event and not bigger problems lurking within - only time, and another track day, will tell.
Comments and thoughts welcome.
Thanks for reading,
Nick (and Mike)