TT rear disc conversion

[Triple D]

Hi does anyone now if a rear setup off a tt would fit onto a mk4 ibiza, as all i would need would be the calipers and hoses, as a very kind chap on here has offered me for free some tt discs for mine if they'll fit.
I now people have said that if they did then a brake balancer divise would maybe be needed, is this true and if so can you do without?

 

[mrcoyote]

There's no real point, aside from looks, is there? From what I understand the rear brakes provide hardly any of the braking force, so the actual gain in comparison to the work involved wouldn't really make it worth it.

 

[Triple D]

There's no real point, aside from looks, is there? From what I understand the rear brakes provide hardly any of the braking force, so the actual gain in comparison to the work involved wouldn't really make it worth it.

So is that a maybe then? apparently with the bigger discs there isnt as much pitching(weight transfer to the front) when you do slam the anchers on.

 

[m0rk]

but your car brakes straight yes?

more braking force @ the back = slidey braking = going backwards after an emergency brake.

I've seen it.

 

[mrcoyote]

Don't slam the brakes on then.

Seriously though, I suspect you'll need some kind of brake bias setup if you could get them to go on, but like I said before there's not much point. Even the Cupra runs the same size discs and calipers as the FR so it's not like you're going to gain much.

 

[stoneyfordNI]

dan this has been done on MK4 golfs , PM me ur email i have info on it i believe , tho i think the braking system will readjust , and if needed increase rear braking power to keep the car stable, if u make the fronts stronger , i would like the 256mm rears for cosmetic reasons alone

 

[m0rk]

How does a mechanical braking system adjust?

All that happens at best is the rears lock up (they're unweighted) and the ABS kicks in, and you don't slow down as quick

really - you are making some pretty dumb assumptions that not only endanger your life, but the people you're about to run into.

taking the standpoint of 'uprating the fronts & rears' both at the same time is great - but unless either of you measure, test measure a whole lot more then you don't deserve to have cars.

You could buy and fit brake bias valves, but somewhere along the line, I think that might be beyond you.

 

[Triple D]

Thanks for the reply's people, what about if i weld aboult half a ton of lead on the rear axle to keep it down only kiddin.
How much are brake bias kits? any ideas. If its too bigger or expensive a job then i may just give it a miss, but it could be a first on a mk4 ibiza and that would surely make it worth it?

 

[Fast_Eddie]

Well after 2 years of putting up with a rear end biased Leon Cupra R I can tell you its not very nice in an emergency stop situation...
If god forbid anything pulls out in front of me that I have not planned for, I can assure you that my leon will not be pulling up straight...

2 dealers have looked at the car and said that they cant find anything wrong with it (as usuall) but even on a dry road under HARD braking, the near side of the car at the rear steps out!!!
This is a complaint I have made 2 or 3 times before each major service and seems to coincide with front pad wear!!!---seems SEAT are not able to find the problem!!!
I really hope I get rid of the car before I have to endure a proper emergency stop in wet conditions whilst the car is not in a straight line.......SEAT you have been informed many times of the problem but not done anything about it--not even a simple bias valve check
When all said and done, only mess around with your braking system on a road car if its proven and reliable cos you never know whats around the corner!!!!

 

[Neo_VR]

There isnt a easy way to get the bigger rear brakes to fit a ibiza...
youll need to source/fabricate some adaptors to get the caliper to sit in the right place...

and its just not worth it..
Techie tried to do it when he had his vRS... but gave up. if he cant do it... noone can

 

[Triple D]

Would this work?
http://cgi.ebay.co.uk/BRAKE-BIAS-PR...ryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[Neo_VR]

Would this work?
http://cgi.ebay.co.uk/BRAKE-BIAS-PR...ryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Nope because the ibiza uses a diaganally split system

 

[Triple D]

Nope because the ibiza uses a diaganally split system

thats that one out the window then.

 

[techie]

It can be done.

There is a late Polo going around with a TT engine in it, he has fitted the vented rears. I gave up because they didnt bolt straight up with the MK4 Golf adapters and didnt want to devote any more time to it as the brakes were ample anyhow.

 

[m0rk]

You would need to re-route the braking system - this means you lose the triangulation 'safety' feature

 

[Triple D]

You would need to re-route the braking system - this means you lose the triangulation 'safety' feature

What the triangulation safety system if i may ask.

 

[m0rk]

if one triangle fails, you still have the other triangle to work. which means you should have 3 wheels to brake rather than none.

 

[Neo_VR]

i know ECS tuning do a kit for a 308mm conversion.. not cheap tho

 

[Feel]

Well after 2 years of putting up with a rear end biased Leon Cupra R I can tell you its not very nice in an emergency stop situation...
If god forbid anything pulls out in front of me that I have not planned for, I can assure you that my leon will not be pulling up straight...

2 dealers have looked at the car and said that they cant find anything wrong with it (as usuall) but even on a dry road under HARD braking, the near side of the car at the rear steps out!!!
This is a complaint I have made 2 or 3 times before each major service and seems to coincide with front pad wear!!!---seems SEAT are not able to find the problem!!!
I really hope I get rid of the car before I have to endure a proper emergency stop in wet conditions whilst the car is not in a straight line.......SEAT you have been informed many times of the problem but not done anything about it--not even a simple bias valve check
When all said and done, only mess around with your braking system on a road car if its proven and reliable cos you never know whats around the corner!!!!

Don't know if that's the rear of the LCR over braked, or just the nature of the rear suspension. Rear ARB has tamed mine a treat.

 

[m0rk]

I think it's 'his' LCR that's over rear braked

308mm kit is just dumb.