Brake Upgrade Information

Hey, I was planing to do a brake upgrade on my FTO GR and was lookimg to get evo 1,2,3 twin pot brakes and bolt them on and done, but after finding 1st gen GTO 4pot calipers, I couldn't say no to them. I did a fair bit of research on how to do it and what I need to change but I couldn't find any information at all about the bracket adapters no matter where searched. Can anyone help me with where can I find those (other than freaky parts in the UK bcz they will cost me a fortune) or maybe a template I can follow to get them custom made?
Thanks in advance.
 
No idea, 99.99% of the members here wouldn't push enough power to be even considering/experimenting with GTO stuff. Probably better off looking at FTO forums for this.

Ultimately I'd say the bolt spacing on the caliper bracket/hub is your first problem.
 
pLethora said:
No idea, 99.99% of the members here wouldn't push enough power to be even considering/experimenting with GTO stuff. Probably better off looking at FTO forums for this.

Ultimately I'd say the bolt spacing on the caliper bracket/hub is your first problem.
Click to expand...
You're absolutely right about not pushing enough power but I got them for a very good deal that is why I picked them up. On the FTO forums they mainly have the Evo 1,2,3 brakes upgrade as it is more than enough for FTO. If it is going to be a headache I'll probably sell them and just stick to the Evo upgrade.
Thanks
 
Hello all,
Iv read through all the post, great info! question: can you use FTO Brake pads in Magna calipers? (both being the twin pot version) I can get top level performance pads for the FTO no problem, yet there is sweet FA in choices for the Magna... Manys thank in advance:sunglasses:
 
DishD said:
Hello all,
Iv read through all the post, great info! question: can you use FTO Brake pads in Magna calipers? (both being the twin pot version) I can get top level performance pads for the FTO no problem, yet there is sweet FA in choices for the Magna... Manys thank in advance:sunglasses:
Click to expand...

As long as they are both the twin piston variety yes. ABS was an option for both single and twin piston i believe, but it doesn't matter for the brake pad. I believe the part number was the same for the single or twin piston calipers anyway
 
donki said:
As long as they are both the twin piston variety yes. ABS was an option for both single and twin piston i believe, but it doesn't matter for the brake pad. I believe the part number was the same for the single or twin piston calipers anyway
Click to expand...
Thank you very indeed! Thats going to make it sooo much easier to get some decent pads for this track car of mine, especially since the drums will stay for a little while, not many Protons/fto's in Tassie..
 
donki said:
As long as they are both the twin piston variety yes. ABS was an option for both single and twin piston i believe, but it doesn't matter for the brake pad. I believe the part number was the same for the single or twin piston calipers anyway
Click to expand...
Another question, if i have the Tr/Ts Magna single pot caliper mounting bracket (130mm hole spacing), can i then use later model (post '96) twin pot magna calipers with that bracket?
also with the outlander twin pot calipers, do understand correctly that they will only work with 294mm rotors or can they work with 276mm rotors? same deal can they be mounted on the magna single pot caliper mounting bracket?

many thanks in advance.
 
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Hi all

Looking to do the basic ‘Proton swap’ front and rear on my 2003 Mirage - I've read the thread start to finish but wanted to check a few things.

-I'll need the soft rear lines from the Proton?
-It sounds as though BMC upgrade is unnecessary, but does firm up the pedal even more than stock?
-Opinions vary on the need for a different prop valve, is there a hard and fast answer on this?
 
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Mirage85 said:
Hi all

Looking to do the basic ‘Proton swap’ front and rear on my 2003 Mirage - I've read the thread start to finish but wanted to check a few things.

-I'll need the soft rear lines from the Proton?
-It sounds as though BMC upgrade is unnecessary, but does firm up the pedal even more than stock?
-Opinions vary on the need for a different prop valve, is there a hard and fast answer on this?
Click to expand...

Proton fronts are a small upgrade, I skipped it myself and went for Magna/FTO twin calipers and a 276mm rotor and Proton rear discs.

I used my original mirage lines to the calipers front and rear.
Still using the original stock BMC, just a matter of bleeding it right. An upgraded one will give you firmer pedal feel, I never bothered though even though I’m now running a full FTO 5 stud conversion, less the FTO BMC.
Also still using my original prop valve.
 
ARC said:
Proton fronts are a small upgrade, I skipped it myself and went for Magna/FTO twin calipers and a 276mm rotor and Proton rear discs.

I used my original mirage lines to the calipers front and rear.
Still using the original stock BMC, just a matter of bleeding it right. An upgraded one will give you firmer pedal feel, I never bothered though even though I’m now running a full FTO 5 stud conversion, less the FTO BMC.
Also still using my original prop valve.
Click to expand...

Yeah starting to think that might be a better way to go up front. I have Rota Grid 15x7 which should clear a 276 - will need to check.

Is your pedal feel ‘as good’ as it was with the standard brake setup?
No noticeable brake distribution issues with the std prop valve?
Were the twin pots a substantial improvement over the single pots you ran first?
 
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Mirage85 said:
Yeah starting to think that might be a better way to go up front. I have Rota Grid 15x7 which should clear a 276 - will need to check.

Is your pedal feel ‘as good’ as it was with the standard brake setup?
No noticeable brake distribution issues with the std prop valve?
Were the twin pots a substantial improvement over the single pots you ran first?
Click to expand...

I don’t remember to be honest, 8 or so years ago it’s been a while.
Obviously never bothered me enough to change it.
 
Mirage85 said:
Yeah starting to think that might be a better way to go up front. I have Rota Grid 15x7 which should clear a 276 - will need to check.

Is your pedal feel ‘as good’ as it was with the standard brake setup?
No noticeable brake distribution issues with the std prop valve?
Were the twin pots a substantial improvement over the single pots you ran first?
Click to expand...
I've also got the twin magna front set up with everything else OEM lancer, for over all brake feel and performance from day one they felt amazing over standard. Since then I have added the rear disc set up from a proton, still retaining the OEM bias valve. Its always been in the back of my mind however I've never done anything about it (have also never tracked the car). Side mention I have had decent lock up on a few occasions (non abs model)
 
a sedan prop valve has a slightly more rear bias

MB699551 - sedan / evo3 - 2.95mpa split
MB699641 - CE coupe / mirage - 2.45mpa split.

so the higher mpa split would allow you to brake harder without overloading the fronts as much. i will be moving to a sedan distrubution block in my car cause of the 294mm fronts versus stock fto rears.

some reading material

page 272
 
unclepaulie said:
a sedan prop valve has a slightly more rear bias

MB699551 - sedan / evo3 - 2.95mpa split
MB699641 - CE coupe / mirage - 2.45mpa split.

so the higher mpa split would allow you to brake harder without overloading the fronts as much. i will be moving to a sedan distrubution block in my car cause of the 294mm fronts versus stock fto rears.
Click to expand...

Ok interesting thanks - and the bigger you go on the front, the more relevant this becomes I take it. Is the sedan block a direct swap fit?

I wouldn't be going any bigger than 276mm, and it's a purely street driven car. Given that, I wonder if the sedan prop valve would be 'necessary', 'ideal but not critical' or 'not required'...
 
unclepaulie said:
a sedan prop valve has a slightly more rear bias

MB699551 - sedan / evo3 - 2.95mpa split
MB699641 - CE coupe / mirage - 2.45mpa split.

so the higher mpa split would allow you to brake harder without overloading the fronts as much. i will be moving to a sedan distrubution block in my car cause of the 294mm fronts versus stock fto rears.

some reading material

page 272
Click to expand...

Just had a thought - Proton prop valve? That’s a disc front/rear car - you’d think the prop valve would be specced accordingly?
 
Depending on when I can get down to Sydney to pick it up (stupid lockdown stopping me from getting them!!), I have a full fto brake upgrade conversion front and rear (276mm front 260mm rear) including everything from master cylinder, brakes booster, prop valve, brake lines and will be happy for post info on how they feel comparing with and without brake booster and with and without fto prop valve, although I have been told but a few people that if you want to go bigger front and rear, you will get all the benefits in upgrading the booster to either the fto booster or a 1" bore brake booster which you can get from rpw which they also recommend too
 
I too skipped the proton front and went straight for the 276mm EVo3/fto disc and twin pot upgrade, proton rear end (with swaybar) and ran an evo4 MC and booster along with a set of FTO braided lines (evo do not fit rear and seem slightly too short for fronts). I was running mazdaspeed 15x7 rims (re-bored wheel hub) and my inner wheel weights clipped the caliper. It was ridiculously tight. In hindsight the proton fronts would have been more than adequate for my application - stock 4g15 equipped stripped Mirage with cage, track only.
 
Most likely yes. There’s definitely an element of ‘if you’re going to the trouble why not go 276mm’ here, but for many people that will be nothing more than a cosmetic benefit.

I have 15x7 Rota Grid and I’m nervous about clearance with the twin pot/276 setup
 
Mirage85 said:
I have 15x7 Rota Grid and I’m nervous about clearance with the twin pot/276 setup
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The 15x7 Rota Slipstreams are known to fit 276mm brakes well, see Steve99's build threads.

I haven't seen definitive confirmation about the Grids, but it would be strange for them to have less clearance when they serve the same niche.
 
pelican said:
The 15x7 Rota Slipstreams are known to fit 276mm brakes well, see Steve99's build threads.

I haven't seen definitive confirmation about the Grids, but it would be strange for them to have less clearance when they serve the same niche.
Click to expand...
Slipstream +35
Grid +38

That’s about the only difference that could cause issues.
 
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