NC 20BPP Time Attack / Track Car - Build Thread

Postby **orx626** » Wed Jul 31, 2013 10:25 pm

Regie wrote:Ahh good thinking. Looks like there could be a group of us roadtripping up Late sept or October sounds good , it seems early sept and oct I have some weddings to attend to

Sounds great!

I'll touch base with you before locking in a date.

Cheers,
Danny

Postby **orx626** » Thu Aug 01, 2013 9:48 pm

The power steering rack mounting brackets have been completed.

The RH bracket takes the steering racks axial loads.

The brackets were lifted from an NA/NB front subframe and modified to suit.

The underside of the two steering rack mounting brackets were closed in....

...with a pair of these nicely dimple died items.

The next step is to re-install the front subframe in the car and then measure and adjust the bump steer as required.

Cheers,
Danny

Postby **orx626** » Sat Aug 03, 2013 10:45 am

The underside of the steering rack mounting brackets.

A few piccies of the re-installed subframe and power steering rack....

We used these temporary adjustable drop pins to minimise any bump steer.

Bump steer over the full travel of the suspension was measured at 10mm increments using a dial gauge. This process was done on both sides. Spacers above and below the "tie-rod" end were adjusted until we achieved negligible bump steer.

More robust drop pins will be designed and manufactured to replace the temporary items.

Cheers,
Danny

Postby **Okibi** » Sat Aug 03, 2013 8:38 pm

Is that the angle you expect the arms to be at when the car is sitting on its wheels?

Postby **orx626** » Sat Aug 03, 2013 8:53 pm

Okibi wrote:Is that the angle you expect the arms to be at when the car is sitting on its wheels?

Definitely not Okibi!

What you see in the above photos is the suspension at full droop. The ride height will be set up at the factory settings. Lowering it will not be of any benefit. :wink:

Cheers,
Danny

Postby **orx626** » Mon Aug 05, 2013 9:38 pm

The build has been progressing rather well over the past three weeks...when considering pretty much jack happened for nigh on 3 years!

With the engine position and subframe/steering rack pretty much sorted I moved my focus to the exhaust system. One of the most important parts is the collector....in this case being a triple rotor(obviously) there are three primary tubes. The collector is an assembly made up of three 15 degree mandrel bent tubes. In this instance the optimum tube size is 2 inch OD.

To assist the fabrication I printed off a 1:1 scale of the developed tube profile.

...then this happened.

This is the flange profile that will keep the primary tubes together in space and break the exhaust system up into sections.

Cheers,
Danny

timk · Postby **timk** » Mon Aug 05, 2013 10:29 pm

That looks amazing Danny. It looks like a rocket in untrimmed form!

Postby **orx626** » Mon Aug 05, 2013 10:34 pm

timk wrote:That looks amazing Danny. It looks like a rocket in untrimmed form!

Thanks Tim. I do expect plenty of flammage from the exhaust! :twisted:

Cheers,
Danny

Sailor · Postby **Sailor** » Mon Aug 05, 2013 10:56 pm

Flammage? English please :-)

Postby **orx626** » Mon Aug 05, 2013 11:05 pm

Sailor wrote:Flammage? English please :-)

My apologies Sailor, I should have written this: "[sic] flammage".

Amongst my university contemporaries (from 20 years ago) it meant "lots of flame".

Cheers,
Danny

Postby **Okibi** » Mon Aug 05, 2013 11:36 pm

Great work Danny, love seeing the detail put into your fabrication.

16bit · Postby **16bit** » Tue Aug 06, 2013 9:16 am

and this is why when i win the lotto i am coming to you with a wad of cash.

Postby **orx626** » Tue Aug 06, 2013 10:01 am

Okibi wrote:Great work Danny, love seeing the detail put into your fabrication.

Thanks Dave. I use Solidworks to design/document components and assemblies so that they can be easily replicated if and when required. Many of our products started life this way.