BEAVIS' White Track Car

The Green Goblin · Postby **The Green Goblin** » Tue Jun 14, 2016 11:41 pm

Wow great thread.. Beast of a car & some good driving!

Postby **beavis** » Wed Jun 15, 2016 11:22 pm

IanR wrote:Looking forward to track results and breakdown... is there a mild version of aero bits for the fakers? Im id there is!

If we get these wings working well, who knows, there may be a chance we can sell some.
David has put the wing to the test at Sandown, and was happy with its initial performance.

Postby **beavis** » Sat Jun 18, 2016 12:37 am

So here are some pics of us making the second wing.

Laying up the wing, some 3 or 4 layers of carbon weave, waterjet cut 12mm alloy end plate mounts. The shape was designed by lightyear and myself, and then drawn in CAD by yours truly.

Vacuum bagging the whole lot because wings love pressure differentials.

Makeshift autoclave to aid with post curing, $12 heater and some old blankies to keep 'er warm.

Straight out of the bag, needs a few hours of sanding and cleaning up.

Strength test, after this photo was taken we had a go at standing on the wing at the same time. The wing didn't bat an eyelid.

Sanded, trimmed, holes tapped for mounting to the wing endplates. Not 100% finished in this pic, but almost....

Tim_cyc03 · Postby **Tim_cyc03** » Sat Jun 18, 2016 12:50 am

Looks great, how heavy is it?

Postby **beavis** » Sat Jun 18, 2016 1:19 am

Oh yes I forgot to add, this one was about 2.7kg.

16bit · Postby **16bit** » Mon Jun 20, 2016 9:37 pm

but what will it weigh at 200kph :mrgreen:

Postby **beavis** » Tue Jun 21, 2016 11:28 am

300kg ? 500kg ? We will see!

16bit · Postby **16bit** » Wed Jun 22, 2016 8:44 pm

madness.

do you have a way of measuring it?

Postby **beavis** » Wed Jun 22, 2016 9:02 pm

I did it in a rudimentary way for the previous wing a few pages back: http://mx5cartalk.com/forum/viewtopic.php?f=57&t=58668&start=150

Essentially, measure the suspension compression difference to static, calculated by the spring rate, take into account that there are 2 wheels sharing the load and lastly factor in the suspension lever ratio.

Spring rate in kmg/mm * deflection in mm * 2 wheels * lever ratio = downforces in kg!

eg:
10 * 30 * 2 * 0.735 = 441kg

Note, I may be wrong...

Postby **beavis** » Tue Jun 28, 2016 9:32 pm

I'm overdue for an update.

Floor cut is done, the OMP seat can bolt in and STAY in now, and it is actually reasonably low...... Have I mentioned how much I hate MX-5's and their lack of room for seats?

Anyway.... onto something different. LS2 Coils.
Thankfully, these are easily available in because every second Holden runs the LS motor.

Well I need to find a nice and neat way to mount these, so, bust out my low spec 'fabrication' tools. Angle grinder, hammer, some bits of steel.

So, after an hour or two of work, this was the mockup of what I had in mind.

I then cut down the M6 rod, welded a nut to the end of it to make a 200mm long bolt.
And cut up some alloy tube for spacers between the coil packs.

With the main bracket now done. I added some very necessary speed holes and gave it a shot of silver paint.

All Bolted up to the motor.

There is also a length of M6 rod on the other side of the coil packs with alloy tube spaced between them and a small steel brace to keep them supported. I tried to make it subtle on that side and I think I succeeded.

Lastly, wiring..... a work in progress at the moment. Thanks to Alex 'bartune' Barton for the help with this.

bartmanftw · Postby **bartmanftw** » Thu Jun 30, 2016 1:55 am

Some more pics of the LS coil loom

Postby **beavis** » Fri Jul 08, 2016 7:35 pm

I took the Supercharged street car for a drive to Phillip Island.
While I was not competing in the track sprint day, I did get a chance to do a few slow laps around the track at lunch time...

Video of the day:

cherrymx5 · Postby **cherrymx5** » Mon Jul 11, 2016 7:58 pm

Nice vid beavis

Sent from my iPhone using Tapatalk

Postby **beavis** » Tue Jul 12, 2016 10:19 pm

Thanks Cherry

I was very satisfied when I fired up the ECU last weekend and everything seems to be working well.

After all the:

rewiring of sensors
new injector and coil pack looms
deletion of all the unnecessary dash wiring
hefty wire cleanup from many of the wires in the engine bay

We tested injectors, checked the LS2 coil packs, configured the oil temp and oil pressure sensors, setup the MAC valve..... and everything was working as expected. The MS3 was happy and so am I.

Next thing to do is update the ECU firmware, and get the flex fuel sensor working.
The docco I've looked at suggests I need to be using the 'clutch switch' input to the ecu, and it appears the firmware the ECU is currently running is missing the flex sensor functionality.
While there is a very good chance I will run the car on dedicated E85, I might as well set the flex sensor up if I can.