does any one what the standard brake disc size is on front and back of a mk2 punto hgt and what pot caliper do they use.looking to upgrade brakes and calipers but dont want a big brake conversion kit

Front discs are 257mm x 20mm (vented), rears are 240mm x 11mm (solid). All the calipers are single pot floating type. Most multi-pot calipers will require at least a 16" wheel size just to fit. A popular upgrade on the front calipers are the 4-pot Brembos fitted to the Fiat Coupe. You need to either buy or manufacture the mounting bracket.

thanks for the info,bought redline mag and they did a section on brakes.i wont to add more hbp to my hgt but also wont to be able to slow down safely.looks like ill have to upgrade the 15"s and the calipers maybe just change the disc to grooved

Unless you are going onto a track, the benefits of grooved or drilled discs are not great. Good quality blanks are your best bet, coupled with pads that can cope with the temperatures (Ferodo DS for street use, or DS2500 if you are really cooking the brakes)

Drilled and grooved discs were designed to allow the pads to 'breathe' when they outgas at high temperatures, preventing a layer of gas forming between the pad and disc. Modern pads tend not to outgas, so this advantage is outweighed by disadvantages such as increased pad wear, braking noise and even disc cracking.

Four-pot calipers, good quality pads and larger blank discs is probably the way forward at the front. As for the rears, they only do <30% of the braking so keep the single pot calipers and discs, just upgrade the pads.

ok cool,i be off searching the internet now.thanks for your help

bensyellowhgt said:

ok cool,i be off searching the internet now.thanks for your help

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Might be worth checking out the Punto Sports Club Forums, there's some crazy brake modifications there. I'm currently collecting a spare room of bits for a GT brake conversion on my 55.

I salute you for considering brake and suspension modifications before upping the power. There are many power-obsessed people out there that have a dangerous power/handling ratio.

Ben, here's a link to a Brembo bracket group buy over at PSC...

http://www.puntosports.co.uk/forums/showthread.php?t=102325

You'll probably need to be a member to take part though, costs £10 for a year's membership.

cheers for the link,joined the club,have a scout see what info they have. hoping to up to 200bhp on my hgt so goina need some good brakes to slow all the horse power down

200 bhp! I'm guessing you'll need a custom ECU to get that sort of power right?

iv found a site that claims to re-map the ecu on a hgt.iv found out that you put a supercharger on the car but needs to be re-mapped for it to work

bonjour, just been spying through this and have a question (which will make me look stupid )
I've just bought some EBC discs - grooved on the front, and solids for the back
I'm waiting for some EBC Greenstuff pads also.
I've had the calipers off before to paint but, i dont have a socket big enough for the bolt on the hub. does anyone know the size?

sorry but dont know the bolt size but was wondering are the ebc disc you bought bigger then the orginals or same size

drew HGT said:

I've had the calipers off before to paint but, i dont have a socket big enough for the bolt on the hub. does anyone know the size?

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Hang on a minute, if it is just discs and pads you're replacing, you don't undo the big hub nut. You take the wheel off, and unscrew those two spikey things from the disc, and then the disc should pull right off.

If you remove the hub nut, you'll need a brand new one to refit it.

bensyellowhgt said:

sorry but dont know the bolt size but was wondering are the ebc disc you bought bigger then the orginals or same size

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they're EVER so slightly bigger - but I'm talking extremely very slightly!!!

MikeSalt said:

Hang on a minute, if it is just discs and pads you're replacing, you don't undo the big hub nut. You take the wheel off, and unscrew those two spikey things from the disc, and then the disc should pull right off.

If you remove the hub nut, you'll need a brand new one to refit it.

Click to expand...

oh i'll try that then
whats the best tool to use to remove the locating pins?

I have a range of tools as big as katie price's education - not very

Sorry, must be my mistake. I know for sure that the disc can be removed without removing the hub nut on a Punto GT. They must have radically changed the design for the HGT.

Although it does seem weird that you would have to remove the hub nut. I'll just do some checks for you.

It uses the same rear hub/bearing combination as the mk1, you must be able to remove the disc without undoing the hub nut, unless something is broken.

rito i'll try it agen when the weather isnt being disrespectfull to me!
the locating pins, are they just screwd into the dics or do they actually go through it and secure it?

The locator pins actually screw into the hub behind the disc. Their job is to prevent the disc from falling off each time you take the wheel off. If you get a small ring spanner on them, they will come out. Then, with a bit of effort, you can pull the disc off the hub.

If you had undone the hub nut, you would have pulled off the disc, and the hub/bearing assembly. Because the hub nut and bearing are destroyed upon removal, you would need to refit new ones. That would be about £100 in parts!

in that case mate, haha, thank you very much for being online at this moment in time, and reading this thread haha
no doubt i'd have gone ahead and eventually said a few naughty words