brakes for 15 inch wheels? - MG-Rover.org Forums
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post #1 of 23 (permalink) Old 14-11-2012, 22:37 Thread Starter
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brakes for 15 inch wheels?

Hiho,

Does anyone have any pointers to sources of half-decent two-pot calipers (ie not sliding, single-sided types) which would fit a TF with 15" wheels? I'm looking for a decent upgrade from the Montego parts currently used that wouldn't necessitate spending a stack of cash on changing the wheels for lower- profile tyres.

If I can get something from a currentish production motor then that would be a bonus.

Ta muchly

Piggly
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post #2 of 23 (permalink) Old 15-11-2012, 10:34
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The normal route in this case is to increase the size of the discs and retain the calipers.

Before you go upgrading the front brakes check that the rear brake's are working properly.
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post #3 of 23 (permalink) Old 15-11-2012, 10:44
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Not sure that I understand this Chris, how do you increase the size of the disc with the existing caliper?
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post #4 of 23 (permalink) Old 15-11-2012, 11:01
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Space the caliper further out on new brackets
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post #5 of 23 (permalink) Old 15-11-2012, 11:10
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Originally Posted by Dieseldestroyer View Post
Space the caliper further out on new brackets
Wouldn't that give the same pad to disc contact, the pads would be the same size to fit the caliper?
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post #6 of 23 (permalink) Old 15-11-2012, 11:15
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Yep... But the larger the disc the great the effect of the pads..

Doesn't improve it by much... But every little helps
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post #7 of 23 (permalink) Old 15-11-2012, 14:02
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post #8 of 23 (permalink) Old 15-11-2012, 14:11
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Originally Posted by WigglePig View Post
Hiho,

Does anyone have any pointers to sources of half-decent two-pot calipers (ie not sliding, single-sided types) which would fit a TF with 15" wheels? I'm looking for a decent upgrade from the Montego parts currently used that wouldn't necessitate spending a stack of cash on changing the wheels for lower- profile tyres.

If I can get something from a currentish production motor then that would be a bonus.

Ta muchly

Piggly

You could try Mike Satur. He makes a big brake conversion for the front that fits the standard TF 15" wheels. Its a marked improvment over the stock brakes without being AP amazing.

Corrado discs ive heard used, as well as Ford Focus ST.
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post #9 of 23 (permalink) Old 15-11-2012, 14:37
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A few have had problems with the Focus ST rear discs warping

I'm going to fit vented front and rear.. But it's not a cheap option by any means and also means new wheels
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post #10 of 23 (permalink) Old 16-11-2012, 21:32 Thread Starter
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well, I'm well aware of the MS kit but I don't like the sliding calipers so I'd really like to change them for something not quite so rubbish! There must be a two piston fixed caliper on something which would fit the mounting centres, moreso with a nicely machined bracket and a pair of bigger discs.

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post #11 of 23 (permalink) Old 16-11-2012, 22:44
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If you're after an improvement but don't want to spend loads this is what you could try:

-Braided hoses
-Green Stuff pads
-Grooved and/or drilled discs.
-Better tyres

Anything above this would be fitting larger callipers and discs and pads.
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post #12 of 23 (permalink) Old 17-11-2012, 05:54
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If you want to fit 4 pots, you are really looking at 16" 11 spoke wheels and AP calipers.
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post #13 of 23 (permalink) Old 17-11-2012, 08:32
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I looked into doing this I even thought of doing a TT 15" kit but it wasnt working out and I was scared of liabilities. So it seems that you're best going for 16" wheels and fitting AP front discs and calipers and then fitting VHS bigger rear discs kit. http://www.vehiclehandlingsolutions.....htm#break_kit
But only if you have done the fronts!

If you just want a 4 pot brake system. Hi-spec do a kit too which might be the place to go. http://www.hispecbrake.co.uk/MGF260B4.html

TT MK7 exhausts for MGF and TF sold out next batch ordered. .
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post #14 of 23 (permalink) Old 17-11-2012, 08:38
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Quote:
Originally Posted by jordimussol View Post
If you're after an improvement but don't want to spend loads this is what you could try:

-Braided hoses
-Green Stuff pads
-Grooved and/or drilled discs.
Have you fittd an of those to Gordon mate - my F is bog standard, but would be interested to hear if any of those mods make a noticable difference for your investment.

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post #15 of 23 (permalink) Old 17-11-2012, 08:56 Thread Starter
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The HiSpec gear looks good and they do a kit for heavy rear brakes too, so that might be the way to go.

Regarding changing pads and discs, I've been down that route and it only makes a small difference, plus it is still using the horrible sliding calipers, so it will only ever be an interim solution for me.
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post #16 of 23 (permalink) Old 17-11-2012, 10:57
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Why choose 2 piston calipers, specifically?
The caliper is stiffer of course, but it wont control the surface pressures of a longer pad any better than a sliding, single piston design and if the pad is not longer then there is no heat transfer advantage.

I use 280mm discs with spaced sliding calipers under 15" VVC wheels and the brakes are significantly better, if that's any help.
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post #17 of 23 (permalink) Old 17-11-2012, 12:03
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Quote:
Originally Posted by jordimussol View Post
If you're after an improvement but don't want to spend loads this is what you could try:

-Braided hoses
-Green Stuff pads
-Grooved and/or drilled discs.
-Better tyres

Anything above this would be fitting larger callipers and discs and pads.
Quote:
Originally Posted by IanMc View Post
Have you fittd an of those to Gordon mate - my F is bog standard, but would be interested to hear if any of those mods make a noticable difference for your investment.
I have all of the above with Toyo's and I've noticed an improvement on the braking system. I've just got to make myself a servo bracket and then I'll see if there is any major difference as I think with less flex else where its moved to the servo.
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post #18 of 23 (permalink) Old 17-11-2012, 12:33
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Quote:
Originally Posted by blackoctagon View Post
Why choose 2 piston calipers, specifically?
The caliper is stiffer of course, but it wont control the surface pressures of a longer pad any better than a sliding, single piston design and if the pad is not longer then there is no heat transfer advantage.

I use 280mm discs with spaced sliding calipers under 15" VVC wheels and the brakes are significantly better, if that's any help.
What that man said I have 280mm discs both front and rear and the improvement is incredible.
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post #19 of 23 (permalink) Old 17-11-2012, 13:21
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I'm going for Brembo 4 pots up front and Brembo 2 pots rear.. So no sliding callipers anywhere..

BUT...

It is by no means a cheap or bolt on option..

The rear hubs will need spot calliper brackets welding on for the handbrake.. And the 4 wheel flanges are being made into 5x100 PCD.. Plus of course 4 new wheels..

Custom brackets being made to take the Brembos.. Plus the cost of buying 4 Brembo callipers and the cost of buying 4 new vented discs..

Bigger brakes are never cheap..
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post #20 of 23 (permalink) Old 17-11-2012, 23:01 Thread Starter
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Quote:
Originally Posted by blackoctagon View Post
Why choose 2 piston calipers, specifically?
The caliper is stiffer of course, but it wont control the surface pressures of a longer pad any better than a sliding, single piston design and if the pad is not longer then there is no heat transfer advantage.

I use 280mm discs with spaced sliding calipers under 15" VVC wheels and the brakes are significantly better, if that's any help.
I was hoping to keep the costs down by avoiding 4-pot calipers but that may not actually help much. Sliding calipers just seem a horrible design and I've never liked them.

Perhaps I should just refurb what I have and try the bigger disc kits. :shrug:

I still find it odd that there's nothing from another manufacturer which would improve things using a standard production caliper; is there any standardisation on the mounting centres, offsets, etc, for brake calipers or am I trying to make things too complicated for myself?

Hohum
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