Can you drill discs your self or take them to a blacksmith

[scotty]

As above providing you space the hole,s evenly and keep the hole size right,is there anything or any reason why you shouldent do it????

Im aware that it makes the disc weaker,but im not going racing it's mostly for asthetics it just looks nicer,and could save a lot of money.

Cheers Scotty

 

[Rab]

NO don't even try it

 

[scotty]

But why?? there drilled on a bench drill when made,whats diffrent from a blacksmith doing it after there made???

If there is some reason?? why can anyone say what it is.

Cheers Scotty

 

[mountainmachine]

They could end up shattering under breaking if done slightly wrong.

Drives: Bravo HGT 155 Nov 2000 - Vroom Yellow
Family: Punto JTD ELX 2001 - Met Red - Volvo S40 2.0 TS 2002 - Red
Old: Brava 80sx 1999 - Red - Punto 60sx 1997 - Red

 

[scotty]

But how can you drill slightly wrong with a bench drill?? do you mean drill to big a hole and to close together?.

You would have to get a template made of an already drilled disc, i know about the extra chance of drilled discs shatering but you need to be giving them some seriouse stick,unless its a fault in the metal which can make them shater.

If you had a template with the correct hole size an spacing,and were using a 100% true bench drill,is there sny reason you shouldent do it.

Cheers Scotty

 

[Lee]

I wouldn't, just buy drilled discs.

 

[Carroll]

Drilled discs don't help to any meaningful degree and are banned by some organizations due to the potential shattering risks, (particularly in Oz.)

Grooved OK if you must, but I would'nt have drilled on any vehicle of mine and certainly not a DIY effort, no matter how carefully done.

 

[scotty]

I have drilled and grooved on the front of my car and they do make a diffrence,not in everyday braking performance.

But there is a 12 mile stretch of road i know and with standerd discs at the end stretch of the 12 miles the breaks are gone,but with the drilled and grooved there still working FACT.

Cheers Scotty

 

[Carroll]

I don't deny that standard discs can be replaced with improved quality items by many companies - Brembo, Tarox, e.t.c....

- I personaly use Black Diamond grooved discs together with their own pads to great effect on my Daihatsu - but I did'nt want their drilled/grooved combo ones and would'nt expect them to be any noticable improvement on the grooved-only ones - using all the same compounds for the discs and pads.
It is quality of these raw materials and the manufacturing process that makes the real difference.

 

[Anonymous]

hi scotty

I have drilled bike discs in the past without any problems.
i can do a hole pattern for you on my cnc mill at work.
It would be up to you though i certainly wouldnt put a warranty on them though.

Cheers,

 

[Tom]

"But there is a 12 mile stretch of road i know and with standerd discs at the end stretch of the 12 miles the breaks are gone,but with the drilled and grooved there still working FACT."

Same make and age of pads in both cases? My guess would be new pads of a different make on the second run.

Bike discs are not cast iron. Different kettle of fish. Cast iron can shatter. As said before, drilled discs are not safe unless they are made from something other than iron and designed to be drilled. Even racing cars don't use them too much these days.

 

[charleyhgt]

"But there is a 12 mile stretch of road i know and with standerd discs at the end stretch of the 12 miles the breaks are gone,but with the drilled and grooved there still working FACT."

Take your foot off the brake pedal and you wont have a problem.
Stick to the speed limit and you wont have a problem.
Dont waste money on fancy discs, spend it on a dictionary.

Just my 2p worth.

 

[donny lad]

my tarrox G88 are alot better than the std discs offered in the hgt match with there own pads the braking is improved tenfold even though the fact ive gone from normal discs with used pads there is still a big difference, grooved are going to be better than drilled as they arent weekened like grooved and dispers heat better but to be honest i didnt really buy for there performance but for the asfetics of them but im sure wimmy and who ever has G88's will tell you they are probably the best before uprated calipers etc. 4pots up front with hgt fronts back at the rear is about as aggresive as you will need in a car as light as a bravo lol i mean it only ways about 1100kgs not much of a saxo.

 

[Insomnia]

If your brakes are shot after 12 miles of this particular journey I'd be worried. Regardless of the road/journey, the brakes should be able to handle any conditions. Sounds like something fundamentally wrong.

I know you've had your engine tinkered with but even so, it sounds like you have poor quality discs and/or pads.

Just my thoughts.

Mar '99 1.9TD / 43,000 miles
Current Status: Oddly enough, alright!

 

[scotty]

Yes Tom diffrent pads,BUT it was not all down to just the pads the discs played a big part aswell, the diffrence in performance was Night and day from having no brakes almost to haveing almost the same stopping power that i had when i started, could smell them but they still worked,i have used the same pads on solid discs before aswell and they were not near as good as with the drilled and grooved FACT i know i was driving it /them.

@ Insy nothing wrong them insy, they were just being worked hard.


@ charleyhgt you know whare you can take your 2p worth and what to do with it. ****!!

And Carrol and Tom were Right its all about the qaulity of the raw product,a blacksmith has said he wouldent do it as the drilled discs will be made from higher qaulity materials than the solid discs.

So original qeustion answerd.

Scotty

 

[Tom]

"it was not all down to just the pads the discs played a big part aswell"

Actually it is 99% down to the pads.

You have vented discs on their already so you've got good cooling even with el-cheapo discs. Drilling them would maybe add a couple of % cooling but add hugely to the risk of failure.

 

[donny lad]

i know what you mean scotty like brake fade etc when the brake fluid is very hot and the pads and discs are due to not been able to disperse feat lol id change ure brake fluids though cos a decent fluid can give better results for braking

 

[scotty]

I dont know what Figures you have for the effectivness of pads to disc = stopping power ratio

but what i do know is how the the performance was changed to what i have said,and i know that for a fact because i drove the car and tested it,and i have driven the road in qeustion since i started driving with diffrent cars and brake pads aswell


So i make my statment from first hand experience,not figures and percetages printed in a book /magazins,or what i have heard.

I was driving the bloody car so i know!!!


Scotty

 

[donny lad]

i had this to mate people took the **** cos i baught the tarrox but i have felt first hand the differences i tend its best to ignore comments that are dirogatry like the above cos sometimes people can be wrong and im on this one with mate my money was money well spent in my eyes

 

[Tom]

Years of trying different pads and discs has shown me that the discs do very little.

On the bravo I've gone through at least 3 disc types and 4-5 pad types.

I run the cheapest discs I can get and use good pads, best way I've found.