saph in dorset

Hey Guys,

I am after some opinions and experiences.

I have a RWD sapphire that is fully stripped an has a full roll cage and is therefore a full out track car, although I do drive I ton the road, but mainly to and from track days.

I have been trying to decide on which size rear brake upgrade to go for, 300 or 325mm. from what I have seen they are either the same or basically the same price.

however I don't want to over brake the rear. I will still be using the standard calliper with either one.

I currently use the standard pedal box so no bias control, but even if I did have bias control would I end up putting more on the front if the rears are over kill.

my other thoughts are can you ever have brakes that are too good.

so any help would be great in deciding which is the best way to go on a RWD sapphire.

thanks

Adam

ajamesc

I've the 300mm set up on mine from reyland very good kit

saph in dorset

but is the 325mm kit which will be just as good quality even better or does it end up over braking it on the rear under hard braking on track?

that is my question really.

ajamesc

Mine had 500bhp and would get into the 140+ dam fast on the road lol so lots of heavy braking. Never felt under braked but to be fair most braking is done on the front

Caddyshack

Get some good pads in there. Stick with the smaller ones as they will give more wheel options.

saph in dorset

Not worried about wheel options. Have a set of 17 currently and a set of 18s to go on so wheel size is no issue.

My only issue is which ones are best. Does the larger one over brake the rear.

Adam-M

Does the handbrake cable have enough length if you where to run 325mm discs as you'd need to space the calliper further away?

At ford fair I've seen a lot of cossies using AP four pots on the rear and using a special little separate handbrake calliper on its own I thought it looks minted but you never see stuff like that forsale.

saph in dorset

Reyland do a kit for exactly what you have said.

Everything i have read is you dont want to upgrade the calliper unless its 4x4.

Caddyshack

If you have the space under the bigger wheels the. Go with bigger, you can easily add a bias valve (not bias pedal box) and adjust it to suit the perfect split. A good mot station can help set the basic on their brake tester.

One other thing to mention, you would probably find that an AP disc at 300 is probably better than 330mm lower quality disc so the quality of disc is important but I think reyland is good and the quality will be the same no matter what size with both kits from the same supplier.

MT does nice kits and communicates much more effectively then reyland

I was always taught by instructors to load up the front by braking firmly and then progressively so the technique could never over work the rears as the front was always weighted up. I.e, a firm but gentle brake to push all the weight forward and then you can really stand on the pedal. Works well trail braking too.

I had an awesome brake set up on my 911 but was always amazed when Dan Cooke or Trevor Reeves drove it how much better the braking distances and power of the brakes was...the reason 10,000 hours of track technique.

saph in dorset

Thanks that confirms what i was thinking really.
I am a big fan of trail braking and do it regularly when on track.

I have seen the MT kit not sure which discs each use might message and ask them.

Caddyshack

I think my will be VERY similar he answers all messages and gave me MASSIVE support when I had an issue fitting ( down to incorrect calipers) he sorted me out with parts and advice. I highly recommend.

Ridgey

iTrader: (5)

I have a 350x32mm kit on the front and 325x20mm kit on the rear. (2wd car)
Found that to prevent rears locking up I only use standard road pads at the back, and a track day pad in the front.
To stop rear pads overheating I installed a couple of pipes under the car from the centre line directing air towards the inside centre of the disc/bells.
Setup works really well.

saph in dorset

thanks that is what I wanted to hear.

I have 330x32 6 pots on the front, so ill go for the 325 on the rear.

out of interest what pads do you use front and back.
I was looking at the RC5+ carbone lorrain pads for the front, and I guess ds2500 on the rear if only want a road pad.

Ridgey

iTrader: (5)

Front I have Hawk HP+
Rear cheap pagid road pads from eurocarparts

Sonic Boom

iTrader: (11)

On my 3 Door I run 355mm AP 6 Pots up front and standard 4x4 discs on the rear and never found I had an issue with under braking at the rear.
Putting proper pads in will improve things dramatically, I run Carbone Lorraine RC6's all round and they are the best pads you'll ever use, bar going Carbon Ceramic Discs.
IMHO I really don't think you need larger diameter rear discs save you money and spend it on the pads.

Rich

saph in dorset

thanks for your feedback.

I don't think they are under braked with the standard size discs but I always think could it be improved.

really I need to get good pads on the rear with good quality new standard discs and then also get a set of the larger discs and see what I prefer, but that is rather expensive.

I have messaged reyland to see what their opinion is, so will be interesting to see. hopefully they have tried a comparison and have the experience.

do you find the RC6 pads squeal, as that is my only reason for looking at the RC5+ as they are meant to stop the squeal.

Ridgey

iTrader: (5)

Agreed, std 4x4 are upto the job. Big brakes look good though ....

Sonic Boom

iTrader: (11)

Yes the RC6 do squeal abit but been as you have a stripped out track car I wouldn't think it would be a problem.
I'd just try a set of RC6's in your current setup I think you'll be amazed at the stopping power.

Rich

saph in dorset

Thing is I need new rear discs now anyway, so wanted to buy the right thing now, as a good set of normal discs is getting on for Ł100-Ł150 anyway.

do you get your pads direct?

Sonic Boom

iTrader: (11)

You can get a pair of Mintex rear discs for less than Ł40 which is what I use.
Yes go straight to Paul @ Carbone Lorraine give him a bell on 07974 153967
Paul's a good bloke and knows what he's talking about.

Rich

saph in dorset

I had a quick look and only found either cheap and nasty or expensive.

where do you get your mintex discs from?

Sonic Boom

iTrader: (11)

I got mine from Car Spares which is local Parts place by me, I'd have butchers on eBay thou, any standard 4x4 discs from either Mintex, Ferodo or Brembo will be fine.

Rich

saph in dorset

ok thanks for that.

I guess they will be grooved, or do you just use flat discs?

Sonic Boom

iTrader: (11)

I just use standard flat discs mate.

Rich

ossie cossie

I got a kit from the UK that use focus ST170 front discs on the rear, I have not fitted them yet, they are cheep to replace the disks.