I have recently bought all the calipers for my rear brake conversion but wanna fit some gruved discs!

I have TAR-OX SPORT JAPANS on the front and wondered if anyone had the same on the rear of there HGT? How much did they cost?

I want a set of discs for the rear and need to know how much they cost? i also wanna know how much EBC green stuff pads cost for the rear?

Any info on any upgraded HGT discs would be great (especially any pictures and prices)..

Many thanks for any help

Paul R

surely it's not worth having green stuff on the back? How much brake dust does your hand brake cause?

They dont do green stuff for the back, only black stuff. Go for Ferdo DS pads all round... or Red Dot

Very good point on the green stuff...it is a bit pointless...

Basically, i have gruved discs on the front and want the same on the back!

I dont race my car, i just pose in it! so it doesnt bother me if they are poo, just the cheapest gruved brake discs, i will probably use stock pads!

Thanks

Paul R

http://www.powerfiat.com/shop/index.php?cPath=8_37

These are the ones we sell at the shows and I sue on the Alfa.

The prices are exc VAT and P&P so you are looking at about £90 all in.

Nige

I thought I read somewhere that drilled discs are a bit pointless unless you use your car on the track. In everyday use, don't they reduce stopping performance?

In the past you may have read about drilled discs cracking but that was eradicated a while ago by a different drilling technique. Drilled and grooved disks allow for more air movement to keep them coooler as well as to remove dust etc.

If you want really improved braking you are talking calipers and pads rather than disks as an improvement in the former will give far greater results than simply changing the discs although at a much greater costs.

Having driven a road car with a full AP braking system last week all I can say is that it stopped quicker than my eyes were ready for - bit cartoon style

Ok people, lets not start this arguement of again...

My problem is simple... I have bought the rear calipers to do a rear disc conversion on my 1.8...i have TAR OX front disc which are gruved...i just want a set to match them for the rear, as cheap as possible! I dont care about all this stopping power stuff...i want discs because they look better and gruved discs to match the front!

@Nige... they are quite nice those discs but i would prefer it if they wasnt drilled as my front ones aint and i want them to match!

Thanks again every1

Paul R

Don't use fast road pads on the back, they will never get up to temp. Use normal road pads only.

Its grooved, not gruved

Grooved discs reduce disc area and 20/40 groove discs will perform worse than standard solid discs on the road.

Also drilled discs still can crack. Cheap discs are still cast iron. You cannot compare a set of £100 drilled discs a set of £400 AP discs or the sorts of discs Porche & Ferrari use.

>In the past you may have read about drilled discs cracking but that was eradicated a while ago by a different drilling technique.

Sorry Nige, this is crap. Its down to the material not how you drill the hole.

a hole is a stress concentration point and so will increase the chance of failure. in practice the method used to drill holes can have an affect on the performance in general terms. If the metal has got hot whilst you are drilling it can locally alter the hardness of the material also. I don't know exactly how they make disks so i have no idea how likely this is.

A company in scunthorpe who make railway switches etc had a problem with the holes they were drilling into rails where they bolt them together which they solved by using a small electric hand tool to get rig of the sharp edge from drilling and the problem went away.

Yup, thats common practice to stop cracking but if you radius the hole on a brake discs in a few k miles the radius will be worn away.

guess so. have to say i still dont like the idea of big hole in a brake disk. lol

These are the fronts



I've got a pic of the rear i can e-mail to you if you give me your e-mail address Paul.
The stopping power was in fairness rubbish.
20 grooves front and rear was not a good idea!

so, to upgrade from normal, what would be best to improve stopping power?

6 groove discs and any non EBC pad at the front, totally stock rear.

so if i was to do a rear conversion, all hgt or coupe parts? yeah?

Won't stop you any quicker. Its a front wheel drive car with the engine in the front so when you brake 90% of the effort is on the front wheels. The rear wheels stop the petrol tank from dragging on the ground.

Oi yer southern Lofty... first you tell me what I said was crap then you said..
"Yup, thats common practice to stop cracking but if you radius the hole on a brake discs in a few k miles the radius will be worn away."
Which is what I was refering too and which I admit I should have elaborated on sorry lol!
A lot of it comes down to personal preference. Tom likes his 6 groove and stock rear, I like my D&G and stock rear on the Alfa, I prefer stock on the barchetta with Ferodo DS pads all round and I am experimenting with the Punto. Anything except EBC which are crap and just make a noise!
They will all stop you as well as the system can with standard calipers and brake pipes (I have Goodrich braided ones on the Alfa which IMO make a difference in the consistancy of braking).
The D&G discs I have are 20k and still have a radius... but when does a radius stop being a radius and become a hole.... discuss