The carbon fibre time attack/superlap MX5 NB twins blog

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby bigdog » Wed Nov 14, 2012 12:54 pm

Cockpit adjustable aero is banned in most FIA sanctioned classes of motor sport because of the risk involved in unbalancing the car or creating lift inadvertently. Those rules date to the inception of wings on race cars in the 60s, so they probably need a rethink in today's computer dríven world.
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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby Apu » Wed Nov 14, 2012 1:20 pm

Speaking of in-cabin controllable aero, I remember waaayyy back in the early 90s, Julian Edgar was working on a front splitter that could extend outwards using an in-cabin control. It was on a Liberty RS I think... Anyone old enough to remember this? I even remember it was a white one.

(my memory is usually not this good but I always promised myself I'd do something like this...one day)

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby bruce » Wed Nov 14, 2012 2:12 pm

One of the import 2 door 90s Skylines had a front splitter which moved electronically (DR30 Skylines?)

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Wed Nov 14, 2012 2:50 pm

Most active aero is banned. I think it is because if it fails you have a huge crash.

On another note, I went over the data from p.I.

Last time there I had mod class setup. Oem hardtop, small front splitter and flat boot lip spoiler. My end of straight speed with the fastback on was up 14km/h even with the dual element wing on( set at 0*.) and brendans top speed was up 12km/h. Mine is probably higher due to better corner speed on last corner. Last time there was a tail wind too. My turn one min was up 15 km/h to 176km/h. I was faster everywhere except turn 4. Brendans top speeds are very much the same as mine. Turn one he is doing 156km/h (20km/h slower), but he has old Porsche tyres, and no aero.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Wed Nov 14, 2012 9:19 pm

Here is a link to the edited video from the morning at phillip island. It just has the bits to compare speeds to other cars. Thanks to Brendan.

http://www.youtube.com/watch?v=VKFPqp0N ... re=g-all-u
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby beavis » Fri Nov 16, 2012 10:13 am

I will endeavor to do a video comparing speeds through corners and down the straights to get some information on what the aero changes are doing.

Less drag (thanks to things like fastback) = improved top speed
More downforce/less lift (thanks to wings/splitters) = quicker corner speeds
More drag (due to wings) = hindered top speed

Would be good to use the video and GPS data to validate these theories and confirm that the changes made have done what we expect.
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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Sat Nov 17, 2012 9:15 pm

Updating my sig laptimes twice in 6 days. That doesnt happen often.

I changed the muffler to a straight thru type, and put a cheap pod filter on. Total cost - $90. Net time gain 2 seconds. The car can do a 1:52 now. Just need to get one lap with no traffic. I did a 1:53.1 with a car holding me up at turn 10. We didnt get many laps as the day didnt run too well.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby beavis » Mon Nov 19, 2012 9:38 pm

Fastest lap from the weekend.
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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Tue Nov 20, 2012 7:50 am

Seen it. I might upload a clean lap on my phone.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Wed Dec 05, 2012 11:48 am

Did the winton round with the club. The first session I had to bed in the new brakes, so no times. 2nd session I had the triple element rear wing too steep. Too much understeer. Dropped the wing right down for one session. Not enough downforce. Tried the dual element wing. Less downforce again, sending the car backwards off the track. Best was the 3 element wing on middle position. But the day was too hot, as was I. So no fast lap times unfortunately.. Only managed a best of 1:38.3 in the 2nd session with the lots of understeer.
Still beat the restricted open record by about 6 seconds.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Sun Dec 30, 2012 6:51 pm

I put the red car for sale, but there hasnt been much interest. So i had a thought to maybe send it to brisbane and leave it at a friends place. That way i can fly up every month or 3 and do the tracks up there with it. As well as any events that the car will be eligable for.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Sun Jan 06, 2013 11:00 pm

Started putting doors on the c.f car.

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NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby Okibi » Mon Jan 07, 2013 12:39 am

Very sexy! :mrgreen:
If you had access to a car like this, would you take it back right away? Neither would I.

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Mon Jan 07, 2013 8:02 am

I weighed the complete bare doors. They are just over 2.0kg's. I intend on cutting some metal out of the hinges (about half a kilo for both). No door handles inner or outer saves over a kilo. And removing all the unnecessary metal and mechanisms of the door latches. Saves another kilo. Doesn't sound like much, half a kilo here and half a kilo there, but just by doing those things is the same weight as the doors.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3

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Re: The carbon fibre time attack/superlap MX5 NB twins blog

Postby lightyear » Fri Jan 11, 2013 3:00 pm

Does this look like i am compensating for something?



Image

Image

They fit really well on the carbon fibre car.
NA8B - P.I 1:50.1 Wntn1:38.0 Sand1:27.6 Wntn S1:08 Bfrd1:06.9 Cldr1:08.5 Wak1:10.4
"SE" - P.I 1:43.8 Wntn1:32.9 Sand1:22.0 Bfrd1:05.3


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