NC 20BPP Time Attack / Track Car - Build Thread

philz · Postby **philz** » Mon Aug 10, 2009 5:47 pm

Paint it pink, like the "+" on mx5 plus.

16bit · Postby **16bit** » Mon Aug 10, 2009 5:49 pm

thats a pretty good idea, look like the gay love child of mazdaspeed and STI :lol:

Postby **orx626** » Mon Aug 10, 2009 6:23 pm

16bit wrote:the big question is what colour to paint it.

..a very boring machine grey, the same as the rest of the interior surfaces :mrgreen:

Jeo · Postby **Jeo** » Mon Aug 10, 2009 6:32 pm

orx626 wrote:
16bit wrote:the big question is what colour to paint it.

..a very vibrant hot pink with sparkles in it, the same as the rest of the interior and exterior surfaces so that the MX5 can loose its hairdresser stigma once and for all

Fixed

Jace · Postby **Jace** » Sun Aug 16, 2009 11:47 am

if it was removable as a whole, it would be awesome to get it gold-chrome dipped!
that looks amazing. quality workmanship and a great product.

Postby **orx626** » Sun Aug 16, 2009 3:45 pm

Thanks for all the positive feedback guys.

Here's a little bit more supercharger kit CNC Machining p0rn...

Work will continue on the roll cage next weekend.

Cheers,
Danny

Ghossst · Postby **Ghossst** » Mon Aug 17, 2009 11:30 pm

Shinny!!!

slug_dub · Postby **slug_dub** » Mon Aug 17, 2009 11:39 pm

This car is going to need warning stickers to wear sunglasses when you pop the bonnet :lol:

rob323 · Postby **rob323** » Tue Aug 18, 2009 7:46 am

Nice work there. Is the cage being built to comply with CAMS requirements?

Postby **orx626** » Tue Aug 18, 2009 7:54 am

rob323 wrote:Nice work there. Is the cage being built to comply with CAMS requirements?

Yes, just in case I decide to get serious about racing. All the members are sized in accordance with CAMS prescriptive requirements.

Cheers,
Danny

rob323 · Postby **rob323** » Tue Aug 18, 2009 8:57 am

Maybe it's just the photos, but it looked like you have a fair bit of crush in the bends in the hoop. Have you checked them to make sure they are ok?
(From a personal point of view, CAMS regs for roll cages suck :evil:

)

Postby **orx626** » Tue Aug 18, 2009 10:03 am

rob323 wrote:Maybe it's just the photos, but it looked like you have a fair bit of crush in the bends in the hoop. Have you checked them to make sure they are ok?
(From a personal point of view, CAMS regs for roll cages suck )

The minor to major diameter ratio must be greater than or equal to 0.900. The bends in the main hoop measured up at 0.946. So all good.

I've found that the prescriptive roll bars / cages set out in Schedule J are far too prescriptive and can hinder the production of a superior design. So the only way to comply the superior design is to go down the FIA Homologation path. The problem with this is that the cost to do so is out of reach of most amateur motorsport enthusiests, hence I no longer do FIA homologation on CAMS behalf.

Cheers,
Danny

rob323 · Postby **rob323** » Tue Aug 18, 2009 11:11 am

I couldn't agree with you more. We even looked at getting our cage ( in our rally car, not the MX5) homologated through MANZ in NZ as it was alot cheaper.

Postby **orx626** » Sat Aug 22, 2009 9:02 pm

During the week I had the pleasure of inspecting and driving Hymee's first production supercharger kit on his own RX-8.

So I guess you're all wanting to know how it went?! Put it this way, I wish I hadn't dríven it....because I want my kit now!!! It performed exactly as I expected....urgent but still as silky smooth right from idle through to redline. The screw-type compressor delivers a substantial increase in torque through-out the rev range to replicate the torque curve of a naturally aspirated engine that has a much larger displacement. Someone unfamiliar with the RX-8 would be hard pressed to immediately realise that the engine had forced induction. Unlike the hoarse whine produced by the Eaton M45 supercharger on my NA8 MX-5, this unit is quieter and far more refined (efficient), which suits the Renesis engine to a tee. I would've loved to have put a few more kilometres on the car and put the supercharger kit through its paces, but home was calling.

Here are some photos of the installation on Hymee's RX-8.

I got a couple of hours on the car today. I've changed the rear wheel/tyre combo to reduce the amount of body modification work so I can get to the track a little sooner than a little later. Previously, I was looking at using 18 x 10.5 with a 15P offset...you may remember the photos :shock:

...anyhow, I'm now using 18 x 9.5 with a 38P offset. So the tyre sizes are 225/40 R18 on the front and 255/35 R18 on the rear. Now that I'm keeping the track wheels on the car I can leave the brake conversion on the car as well as it won't fit under the factory RX-8 wheels I had the car rolling on.

This change has resulted in a lot less body work modification. So much so that I had a crack at rolling the right rear wheel arch to see what I could easily get out of the panel with one of those guard roller thingees.

Before...(LHS should have taken photos of the RHS before! :roll:

)

After...(pretty much achieved what I was after in 20 mins....needs a bit of a tidy up, but this will happen when the paintwork is sorted out near the end of the build.

I also reinstated the dividing panel between the cabin and the boot. It just needed a couple of notches to fit around the rear diagonal legs of the roll cage.

Cheers,
Danny