The carbon fibre time attack/superlap MX5 NB twins blog

nfs13b · Postby **nfs13b** » Mon Jun 13, 2011 10:22 am

lightyear wrote:How much does yours weigh? The bar work in yours would add close to 100kg's i would think. The entire bodywork on mine will weigh about 19kg's including the doors, roof, etc.. About the same as the oem hardtop.

Mine weighed 745kg without the gearbox, engine internals, clutch and fluids....

lightyear · Postby **lightyear** » Sat Jun 18, 2011 9:08 pm

Shed is up now, electrician is coming tueday, and then i can put the lining in and try and fit everything in.

The yellow mx5 is the new temporary track car.

Postby **NitroDann** » Sat Jun 18, 2011 9:13 pm

AWESOME.

HURRY UP !!! :mrgreen:

Dann

dave2221 · Postby **dave2221** » Thu Jul 07, 2011 1:15 pm

any updates?

lightyear · Postby **lightyear** » Mon Jul 11, 2011 8:23 am

Yep i did the 2nd round of the victorian super sprints yesterday. Managed to win my class (standard 0-1600cc) by 5 seconds and put a lot of other cars to shame in the higher classes. Not bad for an old near standard na6, it even has working a/c. Here is a video of me chasing a sports sedan full on race car in radical class. http://www.youtube.com/watch?v=gvPth1OK_zc

I have started on the door moulds for the c.f car too and should have them finished by the end of the week.

And for anyone interested the mx5 is definately faster with the hardtop off around winton.

And the garage is nearly all lined and insulated.

rascal · Postby **rascal** » Mon Jul 11, 2011 10:50 am

lightyear wrote:And for anyone interested the mx5 is definately faster with the hardtop off around winton.

Interesting.
So the extra 20kg saving outweighed the drag disadvantage.
That would suggest even more reason to take off the hardtop on the short circuit...

lightyear · Postby **lightyear** » Mon Jul 11, 2011 3:39 pm

Unless you have a c.f hardtop, it is pointless running it. The extra weight is just too much to make up by any aero advantage. I will be running with the softtop until i make a c.f hardtop for it. 20 odd extra kg's is a fair amount, especially being up high.

Pic of the yellow car after the supersprint.

Postby **NitroDann** » Mon Jul 11, 2011 3:46 pm

Why not just remove the soft top and run a hardtop?

Dann

lightyear · Postby **lightyear** » Mon Jul 11, 2011 3:49 pm

Well you can, and that's what i did. Still slower with the hardtop. And depending on the class your in, you have to keep the softtop even if you have a hardtop.

Postby **Okibi** » Mon Jul 11, 2011 8:33 pm

May I ask what size wheels and tyres you are running?

lightyear · Postby **lightyear** » Mon Jul 11, 2011 8:50 pm

They do look large in that pic, but they are only 15". However they are 9" wide. The tyres are the kuhmo 225's r specs, and they are 4mm wider than the toyo 205's. Not 20mm like the tyre size suggests. The rims sit on the ground when they are on there side - the tyre is skinnier than the rim.

Postby **Okibi** » Mon Jul 11, 2011 9:00 pm

Thanks for sharing :mrgreen:

lightyear · Postby **lightyear** » Tue Jul 12, 2011 10:59 pm

Well i finally got something done on the c.f car. The inner door mould is done, and tmrow i should have the outer door mould done. Then onto the drivers door.
I also made a c.f front spoiler for my yellow car while i was waiting for the resin to cure. Probably the worlds first of it's type. Pic is straight out of the mould, so needs cleaning and trimming.