Discussion
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
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
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 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
Cheers,
Mick.
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 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
Cheers,
Mick.
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
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
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.
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.
mickrick said:
Must type quicker !
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
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.
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.
I didn't say I was going to weld
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 !
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...
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.
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 !
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...
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.
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
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
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...
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
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
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...
Thanks Mick. BGD's standards
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 )
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
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 )
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
Edited by mickrick on Saturday 9th February 10:15
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