MR Tuning Track Day

Magpie · Postby **Magpie** » Tue Jul 28, 2015 8:54 pm

Attended my second MR Tuning track day today and despite a car that could not be dríven over 6,000 RPM for most of the day managed a 1:07:23 on the clubman. Putting into context my JapNat time was 1:06.68. Max speed down the straight was 168/154 and into turn 6 160/150, plus using different gears due to RPM limit issue. JapNat was mainly 3/4 whereas MR Tuning was 5/6. For the national managed a 1:36.70, previous was 1:32.19 but again the max speeds were a lot different 167 as opposed to 184 down the back straight.

Since the car could not be dríven above 6,000 RPM I had to focus on new brake points and gaining corner speed by breaking later and less of it (words of wisdom from Warren Luff). So spent the day working on turn 1 and 2 on the track and changes in the engine bay. Out of the 9 x 20min sessions I managed 8, car was almost undriveable by the end of the day due to the miss.

However not focusing on the miss, rather driving a car that was vastly different power wise. The advice from Warren was spot on and it contributed to me being able to go through turn 1 and 2 with more speed than previous, plus left foot braking on turn 2 also saw time picked up. Goes to show that even with less power on the straights you can go through corners faster and don't need heaps of horsepower. The car was not fast in a straight line and could not be dríven out of a corner on its torque curve however a change in style produced some remarkable results.

More words of wisdom for Warren again, when settling in for a long race and you are conserving fuel it is surprising how fast times are, it is a case of getting into a groove and driving the car with consistency. It is all about carrying as much corner speed as possible by braking later and less of it (rinse and repeat).

Example:
Turn 2 turn in speed - 120/119 (JapNat/MR)
Apex 119/127 (MR 0.21 secs quicker)
Turn 3 (brake) 143/143 (MR 0.31 sec quicker)
Turn 3 Apex 65/70 (MR 0.50 sec quicker)

Many thanks to the MR Tuning pit crew. It is great to have somebody that adjusts your tyre pressures (32 hot) every time you come in. Plus, Cameron for making suggestions to narrow the miss down and not giving up. Warren for advice and video reviews, he tried to help with the miss issue as well (added humour), however his advice for the track made it all worthwhile (despite the lack of power).

Car is going to Plus tomorrow for some more investigation into the cause. Notwithstanding I personally believe that next time the car is 100% I will be able to drop even more time at QR.

Was it value for money... YES!

plohl · Postby **plohl** » Wed Jul 29, 2015 7:04 am

I thought they only did the national track so good to know they did clubman.
Hope the cars an easy fix

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Magpie · Postby **Magpie** » Wed Jul 29, 2015 7:32 am

There were about 5 cars in the "slow" group (slower than 1:20 on the national) and it was agreed between us to alternate between clubman and national.

Also met up with the organiser of the Cootha Classic and some of the people running in it. Father/daughter (BMW/Proton) had their first run at QR and like me benefited from Warren's tuition. After lunch a GT3 Porsche Cup car and V8 Ute joined the group both drivers getting used to their cars.

Car fix, no idea what the fix will be, beyond my knowledge. It basically feels like a soft cut, but only when under load. If you drive below 5,000 and be gentle there is no issues. Spark plugs nice colour, 1/4 a little whiter than 3/4 however no plug was fouled. Moving/taping/swapping COP's or CAS sensors seemed to make any difference. However when 'missing' no 4 EGT dropped about 150 deg c. However in the afternoon 1 went generally hotter. All the data has been sent to Plus (Innovate and Haltech).

plohl · Postby **plohl** » Wed Jul 29, 2015 8:09 am

Faulty injector maybe

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Magpie · Postby **Magpie** » Sun Aug 02, 2015 6:10 am

Here is a plot (speed/distance) comparing my PB (red) with my best lap with the car not going over about 6,000 RPM (blue), so a bit underpowered. It is obvious the speed difference on the straights, however from the apex of turn 1 I picked up time and did not start loosing time till after T4. From T4 to T6 is a good acceleration zone. But again at turn 6 time was gained despite a slower straight speed. In addition the later braking is also obvious, I can learn...

QR_Miss_Lap by Eipeip, on Flickr

Posted in my garage thread, but here are the G Plots (all sessions) from my best (FZ201's) and recent (AD08's)
FZ201's - JapNats in May

FZ201 by Eipeip, on Flickr

AD08's - MR Tuning track day

Advan AD08 by Eipeip, on Flickr

Magpie · Postby **Magpie** » Wed Aug 05, 2015 4:54 pm

Some pictures from the day http://www.mr-tuning.com.au/news/2015/test-07-in-pictures/

I must admit I was impressed with this embellishment "The full-race MX5 did the trick pulling impressive times all day!".

The 3rd and 2nd last cars are competing in the Cootha Classic. Father drives the BMW, daughter drives the Proton. Yes the Proton was very loud.