Nuvite II

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Discussion

DaveK-S1

285 posts

200 months

Saturday 6th October 2012
quotequote all
Mick

I'm surprised your not looking at a vented disc for the rear bearing in mind the performance you are looking at.
The C400 racers used a vented disc setup as the solid discs tend to get too hot iirc

I'd be interested to see the drawings

Dave

Edited by DaveK-S1 on Saturday 6th October 17:09

mickrick

Original Poster:

3,700 posts

172 months

Saturday 6th October 2012
quotequote all
Hi Dave,
I don't think I'll need a vented disc on the rear, as they'll be a bit bigger than the standard 240mm discs. The fronts will be doing most of the work, they are also a bit bigger at 279mm, about as big as I could get into a 13" wheel.
Vented will also be quite a bit heavier than the solid 9.7mm.
The disc and caliper is also a Formula car caliper.

I'm also going by advice from BGD, they've done a couple of Caterham racers, and do lots of historic F1 stuff, so know a thing or two about brakes. They also do Moto GP and BSB.

When I was last there in January, they showed me a new hub and a carbon disc they'd made for one of the 6 wheel Tyrell's smile I was shocked at how small it all was!

What size are the C400 race car rear discs, do you know ?

I'll be happy to send you what I have, but if you don't mind I'll ask David if he minds me showing his drawings first, or if you're interested in a similar setup, you could drop him a line. The hard work has been done smile

Cheers,
Mick.

DaveK-S1

285 posts

200 months

Monday 8th October 2012
quotequote all
Mick

I'm in the same business a BG, so know them well.

The C400 used the same 254mm disc as used on the fronts, with a 2 pot caliper using the cp5119 pad shape, which is slightly bigger than the one you are using.

Parts shown here http://www.caterhamparts.co.uk/product.php?id_prod...


Dave

mickrick

Original Poster:

3,700 posts

172 months

Monday 8th October 2012
quotequote all
Thanks for that Dave.
So they where overheating a vented disc? Crickey! Did they find a cure?
All I know is BGD have used the same disc and Calliper on a Seven race car, and it's apparently working very well.
At the end of the day, it's a 550kg car, so they must really cane them to over heat the brakes! Don't forget my car is for the road, so I'll be using a different compound pad. I have DS2500's in the front callipers. They had to be cut from a larger donor pad, as you will know the AP Radi-cal calliper isn't normally used on a road car, so no road compund pads where available.

sfaulds

653 posts

277 months

Monday 8th October 2012
quotequote all
You'll be fine with a solid disc on the road.

mickrick

Original Poster:

3,700 posts

172 months

Monday 8th October 2012
quotequote all
I think so too.
I don't want to be lugging weight around or rotational inertia I don't need.

Farlig

632 posts

151 months

Thursday 11th October 2012
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mickrick said:
Must type quicker ! smile
Haha - agreed!

Very interesting... What are your plans for MC setup? You going for dual MC & bias bar?

Need to follow this carefully & learn - I'm thinking now of retrograding/restoring my '68 S3 to a real '68 & building a new cat along a similar line to yourself - nice Arch chassis with all the doberrys I want & a nice 300hp 2.3 duratec... Brakes are paramount!

Kgass - if you're reading I might be very interested in your crossflow & 4speed... and I have nice zetec, Omex, Jenvy's, raceline bits which we can deal on if you decide zetec over duratec!


Edited by Farlig on Thursday 11th October 19:20

mickrick

Original Poster:

3,700 posts

172 months

Thursday 11th October 2012
quotequote all
Hi Farlig,

I'm going to junk the Caterham pedal setup, and go for floor mounted pull rod pedal box, with a cable adjusted bias bar.
That's the next project after the rear brakes are finished wink

Farlig

632 posts

151 months

Thursday 11th October 2012
quotequote all
Nice one - floor mounted has to be the best setup but how do you plan on adapting the chassis..?
I seem to remember reading somewhere on BC perhaps about a guy having that setup I think Arch did the chassis mods...

I think I need to start a checklist of all the things I want before ordering a chassis... (not in Ti though!)

Cheers,
Neil.



mickrick

Original Poster:

3,700 posts

172 months

Thursday 11th October 2012
quotequote all
A grinder is your friend wink
Also a friendly Argentinian welding maistro is mine hehe (He does all my boat stuff wink )

Farlig

632 posts

151 months

Friday 12th October 2012
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Interesting - no concerns with mixing welding & brazing then?

Think I'll try to have all the plans in place before heading to Arch with a design brief ;-)

Wonder if Bruce'll be happy building a CSR style front & indy rear ended S3 chassisyikes

mickrick

Original Poster:

3,700 posts

172 months

Friday 12th October 2012
quotequote all
I didn't say I was going to weld wink
I said I have a welding Maistro friend, i.e. if it involves joining metal, any metal, he can do it, and very pretty it is too ! smile

I wouldn't bother with a pushrod front end. I didn't like it on the CSR. Plus it increases unsprung weight
The only advantage I can see from it is aero, and you can pretend you're an F1 driver, especialy if you have a removable steering wheel... smile

The IRS is great on bumpy roads though. I asked bruce if he'd change mine, but he didn't want to do it.
The other nice thing about the IRS, is that without the DD tube in the way, you could have inboard discs on the back.

Farlig

632 posts

151 months

Friday 16th November 2012
quotequote all
I think I need to head back to the UK and test drive a couple of different options & see where I want to head..

I guess building a chassis from scratch will be easier to get what you want vs having a chassis changed ;-)

mickrick

Original Poster:

3,700 posts

172 months

Saturday 17th November 2012
quotequote all
Or have Arch build you what you want. Then you can have some control of the quality of the powder coating.

mickrick

Original Poster:

3,700 posts

172 months

Thursday 7th February 2013
quotequote all
A bit more progress on my rear brake setup.
The shoes had to have a fixture made to hold them, while they where machined out to fit around the bearing carrier. You'll also notice a bit more lightness was added smile

The disc bells have also been machined up. Here is a view from the rear with the shoes inside the bell.

The backplates have also been machined.
Here's the bell/disc etc. mocked up. It all fits!
Notice how the disc can be unbolted, and rotated to remove without removing the hub or the bell wink

The actuators and calliper mounts have to be made now, then everything hard anodised.
The drum parking brake setup should be lighter than a spot calliper, and much neater I think.
That's all for now...
smile

timrw81

244 posts

187 months

Thursday 7th February 2013
quotequote all
Just read the whole thread again, to remind myself of what patience looks like while I'm still dreaming of my own 7. Well done Popeye smile . Are you going to be spending more time on this now?

mickrick

Original Poster:

3,700 posts

172 months

Friday 8th February 2013
quotequote all
Cheers. I'm hoping to have it sitting on its own rubber this year. smile
Then I'll be getting the grinder out.

one eyed mick

1,189 posts

160 months

Friday 8th February 2013
quotequote all
All up to your usual imaculate stsndards I would love to be able to afford building ,owning and driving some thing of beauty as you re creating

mickrick

Original Poster:

3,700 posts

172 months

Friday 8th February 2013
quotequote all
Thanks Mick. BGD's standards smile
How did you get on polishing your stainless tub? Did you ever get around to it?

The bells have now gone off for anodising. (along with some of my boat bits wink )

Here's a shot of the backplates bolted to the de-dion ear and bearing carrier.
You can see there's not a lot of room to squeeze the actuator in, but it's do-able.
The de-dion ears are 2 degree JPE items.


TTFN,
M smile

Edited by mickrick on Saturday 9th February 10:15

one eyed mick

1,189 posts

160 months

Sunday 10th February 2013
quotequote all
Hi Mick re the polish I chickened out 95% is ok but wanted to improve what I could now I'm retired it may get done but am finding a little difficulty getting in and out of it so it may have to go may be next 2014 year . Keep posting the pictures and keep a dreamer happy