NC 20BPP Time Attack / Track Car - Build Thread

Postby **orx626** » Fri Jul 24, 2009 10:08 pm

AJ wrote:so................they mask off the deadener & paint around it?? .......I assume this is because adhesion is better without paint??

They paint over the deadener AJ. That stuff sticks like sh1t to a blanket! :lol:

Once it thaws out it sticks to whatever it is in contact with....so I quickly cleaned it up from the workshop floor.

Cheers,
Danny

NMX516 · Postby **NMX516** » Fri Jul 24, 2009 10:15 pm

That's certainly one way to remove sound deadener!

If I get a chance I'll stop in at some stage over the w'end Danny. Happy to lend a hand if required

Mokesta · Postby **Mokesta** » Sat Jul 25, 2009 3:49 am

I hope you weighed the removed material?? What did it weigh?

Typically there is a layer inside door skins. Is it there on an NC?

M

Postby **orx626** » Sat Jul 25, 2009 10:00 pm

Mokesta wrote:I hope you weighed the removed material?? What did it weigh?

Typically there is a layer inside door skins. Is it there on an NC?

M

Be lucky if there was 5kg of the sound deadener and there is nil in the doors and the boot. It was merely an exercise in cleaning up the floor plan and getting to play with dry ice!

Cheers,
Danny

Mokesta · Postby **Mokesta** » Sat Jul 25, 2009 10:02 pm

Pics of today's progress??

Postby **orx626** » Sat Jul 25, 2009 10:43 pm

Well today was quite successful. I was able to check a few bits and pieces and got a good start on the rollcage.

First job of the day was to see if converting the rear brakes to 4-piston Brembo was doable. Some initial cross-referencing of brake rotor key dimensions highlighted that the brake rotors I've used on the front may well fit the rear.

It's quite a beefy upright that Mazda use on the multi-link rear end! :shock:

....and the rotor fits perfectly.

Next was to see how the 4-piston Brembo interacts with the upright. It appears that the caliper bracket will just be a suitably sized rectangular block of T6061 with 4 tapped holes.

The final check was the clearance between the caliper and the RPF1 wheel. Clearance was on par with what I've got on the front.

At this stage upgrading the rear brakes isn't a high priority as I will need to sort out a hydraulic handbrake arrangement to work with it. We'll see what happens over the next 5 few months.

Next on the list was to also trial fit an Autoexe chassis bracing kit for the NC. I won't be using it on this car as my intention is to flat sheet the underbody, however I wanted to look at what they did and why. If my exhaust and PPF wasn't sooo big it would've fitted much better. :oops:

. Looks pretty cool too!

..it would want to, IIRC it retails for over $1,500! :shock:

Last an most important part of the day was to get the roll cage underway. After a couple of main hoop variations...mainly in width between the vertical legs...I finally got the geometry right. The key was to have the main hoop fit as close to the inside of the hard top, but still have enough clearance to allow the hardtop to slide rearward for the rear brackets to disconnect from the frankstein bolts.

RH main hoop foot plate ready for welding out.

LH rear leg foot plate ready for welding out.

The RH main hoop foot plate welded out and the main hoop tacked in place.

RH rear leg fott plate stitched in place. It will be fully welded out after the Tien Flex's are removed :wink:

.

Main hoop tacked in position. The seats are in their rearmost positions.

....and with the hard top on.

Hopefully tomorrow goes as well as today. Now that the main hoop is in its final positon, I can adjust the key dimensions in the solidworks model and have all the straight members required in the main hoop and rear sections laser cut over the next week or so.

Cheers,
Danny

Old Dude · Postby **Old Dude** » Sat Jul 25, 2009 10:53 pm

Looks like you had a very successful day, with everything going to plan.
Good luck with tomorrow
Cheers
Dale

PUR157 · Postby **PUR157** » Sun Jul 26, 2009 3:32 pm

As always a big admirer of your work... is that SlugDubs car getting a cameo? :lol:

16bit · Postby **16bit** » Sun Jul 26, 2009 7:22 pm

nice work danny. just over a month and you get to work on my car

Postby **orx626** » Sun Jul 26, 2009 9:01 pm

PUR157 wrote:...is that SlugDubs car getting a cameo?

Well spotted! :wink:

16bit wrote:nice work danny. just over a month and you get to work on my car

Just name the time and I'll make arrangements at the place! :mrgreen:

Cheers,
Danny

Postby **orx626** » Sun Jul 26, 2009 9:51 pm

Not a lot pretty pictures today. It was really a day of sorting out the way forward with the roll cage. Dimensionally every looks fine with the structure from the main hoop rearward. So I hope to have all the materials for it with in a couple of weeks. I got in and etch primed the welding that was done yesterday to keep that nasty surface rust at bay whilst the rest of the cage comes together. Here are some pics with the seats removed.

I spent some time working through details for the front legs and then removed the dash once again.

Due to the complexity of the bends that are required for the front legs to be continuous I'm knocking up a prototype member from a whole lot of part pieces. This is as far as I got on the right front leg. Once I'm happy with the prototype I'll have it made in one continuous piece.

Cheers,
Danny

slug_dub · Postby **slug_dub** » Sun Jul 26, 2009 10:45 pm

PUR157 wrote:As always a big admirer of your work... is that SlugDubs car getting a cameo?

Ye gods so it is! :shock:

I've flipped through this thread several times over the weekend and it didn't even click, I'm hopefully able to take the slug off your hands tomorrow I should sneak my way into the shop for a drool over your work in progress... but I can't guarantee I wouldn't get drool on your car, there'd be a lot of drool... :lol:

Like OMX-596, this looks like a brilliant car.

dorifta · Postby **dorifta** » Tue Jul 28, 2009 6:11 am

I'm lost for words....... insane build!!!!!!!!

sorry if i missed this but what exactly are you going to do about the guards? Just a roll or some widebody happening?

Postby **orx626** » Tue Jul 28, 2009 10:20 pm

dorifta wrote:sorry if i missed this but what exactly are you going to do about the guards? Just a roll or some widebody happening?

I've got another wheel offset option on the cards. Either way guard rolling without major body work is the plan. I just hope the plan can hold true.

Cheers,
Danny

Postby **orx626** » Tue Jul 28, 2009 11:05 pm

Continuing on from the weekend.....the solid model of the cage has been updated to reflect the "as installed" dimensions of the main hoop and rear foot plates. Roll bar materials have been ordered and should be with the laser cutter tomorrow. The IGES files for each of the members will be e-mailed tomorrow as well. Here's hoping I have the bits back by the end of next week.

Cheers,
Danny