Front Disc Upgrade Options for S - New WIKI

[v8s4me]

Would any anoraks like to check this?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by v8s4me on Sunday 10th January 22:38

[DamianS3]

v8s4me said:

Would any anoraks like to check this?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by v8s4me on Sunday 10th January 22:38

I took a look earlier.. Thanks.. It left me confused however.. I think for commentary or a conclusion are required.

Thanks

Damian S3

[Top Gear TVR]

I like it. Could we add a comments column, e.g.

283 55 24 MDC638 DDF384 BDS4756 11/1987-01/1990 Ford Sierra Cosworth (87-93) 2.0 L Requires OD turned down to 278 or grinding of caliper to allow use of no or small >2mm spacer at carrier to hub mount

[Griffinr]

Good reference material.
Question; what does height refer to?
Suggestion; add a line for standard set up.

Rob.

[mk1fan]

Height is how high the disc is if laid flat on a table. Ideally we'd (for the TVR) would need a 55mm high disc, 278mm diameter, 24mm thick braking surface and four studs to fit behind the 15-inch wheels. Doesn't seem to exist despite my searches.

Scorpio Cosworth was 5-stud pattern so adding that to it would be handy - for those with 5-studs.

[v8s4me]

Thanks for all your contributions gents.

mk1fan said:

...Scorpio Cosworth was 5-stud pattern so adding that to it would be handy - for those with 5-studs.

I did originally have the data on the Granada 5-stud option but decided not to include it. As I've already got that data though, I'll add it in together with Steve's contribution. I can't see the point of adding the standard sizes because we all know what they are. As for adding a conclusion; well that wasn't really the point of the exercise. I've pulled some of the available data together so you can draw your own conclusions. There's still quite a lot of work to do for anyone considering the upgrade options, eg working out what spacers are needed, the best/safest way to make these, what pads to use if not using the 887/888 calipers etc. The purpose of the WIKI is just to get you started. Updating a WIKI is quite straight forward so please feel free to add a line to the first section if you have used the 887/888 calipers, and add to the second section if you have used an alternative caliper, and explain that in the notes column. Then add the details of the pads you used.

If anyone is confused by any of the references to sizes, the best course of action is to look up the data sheets on the manufacturer's sites. All the dimensions are explained there. This is an important step in the learning process if you are considering mucking about with your brakes.

Please, if you're not sure what you are doing, don't do it. The standard brakes are perfectly adequate for normal road use.

Edited by v8s4me on Monday 11th January 17:16

[Top Gear TVR]

I've just ordered some 55 x 283s for the V8S, will be 278 and 887/8 calipers.

[Top Gear TVR]

Haven't measured the oz split rims though.... Is there as much room For dinners as there is inside the oz 8-spokes?

[v8s4me]

Top Gear TVR said:

Haven't measured the oz split rims though.... Is there as much room For dinners as there is inside the oz 8-spokes?

I'm not sure about that, and I'll be interested to know in case I want to put the 8-spokes back on mine. Phillpot has 278mm discs inside his Mini-lites, and I don't think they are much bigger than the 8-spokes. You might have to think about where the balance weights go though.

What pads are you getting for your V8S conversion?

[AutoAndy]

No comment to add on upgrades, other than pressing harder to stop quicker...

I asked the mods to put a sticky on it so it stays at the top of the page in future.

[Top Gear TVR]

Might do in a minute...

[v8s4me]

AutoAndy said:

...I asked the mods to put a sticky on it so it stays at the top of the page in future.

Thanks Andy.

AutoAndy said:

No comment to add on upgrades, other than pressing harder to stop quicker...

I didn't think you bothered too much with brakes

[v8s4me]

Top Gear TVR said:

Haven't measured the oz split rims though.... Is there as much room For dinners as there is inside the oz 8-spokes?

Here is a picture of the larger (273mm) rear discs and calipers inside the 8-spoke wheel. Not a lot of room.



More room though inside the Estorils...



So, will the 278mm disc and 887/888 caliper fit inside an 8-spoke rim? Might be touch and go. Possibly more touch than go

[Top Gear TVR]

Joe, I have them fitted on TGTVR... Now looking at same for V8S.

[v8s4me]

Top Gear TVR said:

Joe, I have them fitted on TGTVR....

You'll have to remind me; does TGTVR have 8-spokes?

[mk1fan]

278 fit behind my OZ 8 spokes. Need to be balanced on the inner edge though. 45mm high discs would ease this.

[v8s4me]

mk1fan said:

.. 45mm high discs would ease this.

How? It's the caliper which will touch the inside of the rim. Wouldn't a 45mm high disc position the caliper further from the hub and nearer the rim compared, to a 47mm high disc?. The only 45mm disc I could find was the one for the Fiesta 5 ST150. Would 2mm make that much difference?

I'd have thought that keeping the caliper as close to the hub, using the highest possible disc, would be the way to avoid the outer edge of the caliper touching the rim.

[mk1fan]

Sorry, got my numbers swapped.

Currently have the 45mm discs and calliper spaced out.

55mm disc would move it all inboard enough to give space for narrow balance weights.

[Top Gear TVR]

v8s4me said:

Top Gear TVR said:

Joe, I have them fitted on TGTVR....

You'll have to remind me; does TGTVR have 8-spokes?

Indeed he does.....283 / 55 disc, turned to 278 OD, 87/88 callipers M10 carrier mount, one single stainless washer spacer at each of the mounts (in preference to 10mm needed with standard 278 discs), oz 8 spokes, balance weights moved and it all fits with room for a pack of risla papers.

[Top Gear TVR]