My British Racing Green '99 NB

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Re: My British Racing Green '99 NB

Postby Trackphotos » Fri Oct 21, 2016 3:40 pm

StanTheMan wrote:OK probably then gets affected by heat cycles. I'm looking for something around 180 or 200... which will get me about 2 years before compound starts reducing in performance. I will do about 15K km in that time So I'd want them to last that long.


For what it's worth, my NT01s didn't slow down from start to finish. Even when the tread was gone, the grip was pretty much exactly the same from beginning to end, on both sets that I've run. That being said, halfway down the tread is enough for them to be a nightmare in the rain, so not ideal for dual-use tyres. Remains to be seen whether the compound in the Achilles is as resilient as the Nitto compound.
QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby StanTheMan » Fri Oct 21, 2016 3:51 pm

I used to run the RT215's & 615's and that's the type of Tyre I want back. But the 215 has been out of production for at least 10 years now 615 is now pretty old as well. There is plenty newer product about these days. Their reputation in the wet was reasonably bad but I found them OK in the wet. Sensational in the dry.
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Re: My British Racing Green '99 NB

Postby pepejesus » Fri Oct 21, 2016 4:44 pm

Trackphotos wrote:For what it's worth, my NT01s didn't slow down from start to finish. Even when the tread was gone, the grip was pretty much exactly the same from beginning to end, on both sets that I've run. That being said, halfway down the tread is enough for them to be a nightmare in the rain, so not ideal for dual-use tyres. Remains to be seen whether the compound in the Achilles is as resilient as the Nitto compound.

Just did a wet session at Barbagallo on some NT01s that pretty much look like slicks now.

I was actually surprised by the lateral grip on a damp track - it's not great obviously, but not as bad as I was expecting. The guys on street tyres were faster, to give you a reference point.

Braking was not too bad, traction was pretty woeful though. Very difficult to get the power down, especially if you were also asking the tyre to grip laterally (ie accelerating and turning). Instant wheelspin.

Pulled the pin after the rain worsened as I would not like to encounter any standing water with them at that tread. I think you'd be off before you could do anything.

However, on a damp to wet track with no standing water, they are not fast, but they're not spit-you-off-the-road dangerous either.
2004 SE - stock ECU, stock engine, BEGi intake, FMIC, BC Racing 10/6, 15x8s, 225/45 NT-01s
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Re: My British Racing Green '99 NB

Postby Trackphotos » Fri Oct 21, 2016 6:01 pm

Yeah, damp grip is tolerable. The problem with using them as dual-purpose tyres is you can't usually just stop on the side of the road and wait for the puddles to dry up

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QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby rascal » Fri Oct 21, 2016 8:19 pm

Trackphotos wrote:For what it's worth, my NT01s didn't slow down from start to finish. Even when the tread was gone, the grip was pretty much exactly the same from beginning to end, on both sets that I've run.

My experience through 5 sets of NT01s is exactly the same. 1/3 of my PBs have come when the tyre is almost to the cords, so they certainly dont heat cycle out, and are very consistent throughout the tyre life.

StanTheMan wrote:I used to run the RT215's & 615's and that's the type of Tyre I want back. But the 215 has been out of production for at least 10 years now 615 is now pretty old as well. There is plenty newer product about these days. Their reputation in the wet was reasonably bad but I found them OK in the wet. Sensational in the dry.

Hmm, my experience of RT615s is totally different. I tried a set of these many years ago when they first came out (supposed to be the next best thing) and they were absolute rubbish. Coming off Falken RX06GBs and yoko A032Rs, these things were 3 secs a lap slower with no redeeming features anywhere. Even tried shaving them to half depth and made buggar all difference. Maybe they are ok on the street but they were the worst track tyres I've ever used.

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Re: My British Racing Green '99 NB

Postby StanTheMan » Sat Oct 22, 2016 8:39 am

rascal wrote:
StanTheMan wrote:I used to run the RT215's & 615's and that's the type of Tyre I want back. But the 215 has been out of production for at least 10 years now 615 is now pretty old as well. There is plenty newer product about these days. Their reputation in the wet was reasonably bad but I found them OK in the wet. Sensational in the dry.

Hmm, my experience of RT615s is totally different. I tried a set of these many years ago when they first came out (supposed to be the next best thing) and they were absolute rubbish. Coming off Falken RX06GBs and yoko A032Rs, these things were 3 secs a lap slower with no redeeming features anywhere. Even tried shaving them to half depth and made buggar all difference. Maybe they are ok on the street but they were the worst track tyres I've ever used.



Interesting . I didn't have theses tyres on for track racing. Although I did a few track days .i best leave it there. :oops:
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Re: My British Racing Green '99 NB

Postby chefie » Sat Oct 22, 2016 9:44 pm

Hoping the proposed schedule changes. As it is, the Sunday will include a 20 lap race of National circuit. With the new ducts I'm not concerned about my own brakes, but I'm keenly aware that a lot of cars coming from sprints up to racing will not survive.


A couple of us had the same concern with brake temps and overall driver and car capacity! especially considering its over the two days and to finish on a reverse grid nat 18 lapper wasnt ideal, after doing 10 practice laps at national everything was very hot and recording 380C disc temps,Caliper temps 220C, Stock discs and Comp 9 pads, motul high temp.

national circuit is brutal on tyres brakes and fuel compared to the sprint and club-man tracks

recent email update from Paul, this is the format request

Quaifying - Clubman Circuit



R1 Clubman 12 laps

R2 Clubman 12 laps

R3 Clubman 12 laps

R4 National 10 laps

R5 National 10 laps

98 NB8A Grace Green
LS 66.17,QR Club 69.27, QRSpr 63.58 SOLD
01 NB8B Grace Green
LS 64.66,QRNat 1.31.94,QR Club 65.17 QRSpr 62.36
93 NA8 Clubman

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Re: My British Racing Green '99 NB

Postby Trackphotos » Sat Oct 22, 2016 9:59 pm

Yep, I did actually get that email, looks like a much more wear-friendly format :) Now I just need to get a catch can and killswitch fitted between now and the 11th.
QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby chefie » Sat Oct 22, 2016 10:14 pm

FYI; Scruit passed me without a external kill switch as i still drive to the track and road registered
98 NB8A Grace Green
LS 66.17,QR Club 69.27, QRSpr 63.58 SOLD
01 NB8B Grace Green
LS 64.66,QRNat 1.31.94,QR Club 65.17 QRSpr 62.36
93 NA8 Clubman

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Re: My British Racing Green '99 NB

Postby Trackphotos » Sat Oct 22, 2016 11:08 pm

Yeah, I know it's been waived before.. But if I do it, it'll be taken care of for the racing I intend to do next year outside of the MX5 Challenge. Besides, mine won't be registered for much longer, so no excuse not to. Will do it at the same time as the catch can.
QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby Trackphotos » Wed Oct 26, 2016 5:17 pm

RSRs are gone from the oem wheels, replaced with Achilles ATR-K Sport semislicks. They appear to be an S-spec compound, so not quite as sticky as most semis, but definitely a comparable tread pattern. I'll be turning a few laps on these at QR on the general practice day before the race weekend, and seeing how they compare to NT01s. It won't be back to back, but nothing else has changed so it should be an okay comparison.

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QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby Trackphotos » Mon Oct 31, 2016 3:09 pm

Took the brakes off again and bent the ducts a little more. Was probably ok, but more room is never a bad thing. Kill switch and catch can will be in tomorrow, then it's ready to go.
QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby Custardtart » Thu Nov 03, 2016 7:34 pm

Just wondering why the move away Z214's?
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Re: My British Racing Green '99 NB

Postby Trackphotos » Thu Nov 03, 2016 7:45 pm

I've been given the nittos just to test out and give feedback on. The 214s will be on for race weekend. I've only run them once so far, and initial impressions are fantastic.

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QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6

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Re: My British Racing Green '99 NB

Postby Trackphotos » Mon Nov 14, 2016 9:29 am

So the weekend went well. Car came home dirty but undamaged, no issues at all over the whole three days. Lots of fun.

Friday was practice. I only ran 7 laps of National to test the Achilles tyres, but with 25+ cars on track, I got no representative lap times. I was able to compare minimum corner speeds to my last time at National back on my NT01s a few months ago (in much better conditions). Impressively, the Achilles were 2-3kmh down on the NT01s through some corners, and equal on others. For a 140 treadwear s-spec tyre at $600/set fitted for 195s, I'm very impressed. Signed on, scrutineered and parked up ready for Saturday.

Saturday was hot and humid.
Qualified P13 of 21, reset my Clubman PB down to 63.9 on Natsoft, 63.8 on Racechrono. First time at QR on the Z214 twin grooves, so happy enough with that. Especially with 50c track surface and 32c+ air temperature, and 21 cars on a short track makes for a bit of traffic too.
Race 1 was good, hot but dry. Finished P14, had some fun chasing Lisa Montgomerie in a high hp NA. Front runners lapped us, giving me an opportunity to get past her into the dipper, but as soon as we got to the front straight she walked past me again.
The lead up to race 2 was interesting, with the radar and our schedule matching perfectly for us to be in the marshalling area queued up to race just as the rain hit. I had made a last minute decision to switch back to the Achilles semislicks just in case, and it was the right call. A good number of cars had no wets, and either didn't start the race or immediately pulled into the pits as soon as possible. It was a slippery race, I finished p10 courtesy of all the DNFs and three cars returning to pitlane, the race leader mistaking a clampdown for a race cancel, and two others following him in. Unfortunately my gopro battery died, so no footage of that race :( Packed everything up and called it a day.

Sunday brought somewhat better weather.
Although still hot and humid, the first race was while it was overcast and not quite as hot as Saturday morning, and we didn't get any rain all day. Race 3, the last Clubman race for the weekend, had me starting p10 because of the wet race on Saturday, which of course meant the quickest cars who had been on slicks all started rear of grid and got past quickly. Had some good fun battling with Shane Plohl before I managed to get past and keep it, and chase after Lisa again. She tried to let me pass on the straight after a few laps, but at exactly the same time a caution was called over the radio and I wasn't sure if she was letting me go, or slowing for something she had seen ahead. I ducked back in behind her and we carried on, finishing in that order, with me in p14.
Starting p14 for Race 4, the first National circuit race, I ended up chasing Lisa again for a few laps before we caught Anthony Bonanno in the LHD Targa NC. Lisa got past, and I followed Anthony. Unfortunately entering T4 he got loose and spun, hitting standing water just off the edge of the track between T4 and T5. I just barely got past without contact, but with front and rear footage it looks like it would have only been half a metre between us, both when I ducked left to avoid him, and when he rolled back across the track behind me. After that, the rest of the race was pretty much on my own. David Smith appeared in my mirrors while I was picking up pace again, but had an engine problem and dropped back. Finished p12.
The final race of the weekend was also on National circuit. Starting P12 and with the front runners at rear of grid again, I allowed too much room for them to pass and let a few others through at T1 and T2. Dropped back to p17, and found myself in a great battle between Shane Plohl, Francois Siebrits, David Smith and myself for a few laps. David had another engine problem after a few laps and let us by. We traded places a few times, thanks to the extra grip I had through T1 and T2 I was able to make a run into T3 a couple of times, but usually had to concede the position at T4. Eventually I got on the left side between T3 and T4, and was able to hold it and got past Shane. The next lap Francois left enough room for me to pass at T2, before reclaiming it at T3 under brakes. By T4 he had moved over and let Shane and I both pass, which is how we finished the race a few laps later.

All in all, it was a great weekend. No contact, no mechanical issues, never touched the grass, reset my Clubman PB and had some great prolonged battles. I also ended up second in class C, which is the 1:27-1:30 bracket on National circuit. Time brackets tend to allow for more luck than anything else, just depends where you fall in between brackets, but still. As Paul Ansell put it at the presentation, 'every kid wins a prize.' I would definitely recommend the MX5 Challenge to anybody who is considering making the move to door to door racing.
QR Clubman: 1:03.9 | QR Sprint: 1:01.4 | QR National: 1:29.4 | LS: 1:01.5 | Mt Cotton: 51.6


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