Brake Master Cylinder Options?

Suspension and other discussion

Re: Brake Master Cylinder Options?

Postby bozo-merlin » Thu Apr 08, 2010 7:29 pm

T18 wiht ABS are 1" bore, T20 with ABS are 1" bore

T18 without ABS are 15/16" bore, and T20 without ABS are ... 15/16" bore


Pedal feeling is better on the T20 MC+MV combo, why ? i don't know but when i tried i feel it, more response with only this change.

My car was ABS, now it's OUT, i tried T18 1" then T20 1" then T20 15/16" and with the last one and without ABS (on track off course) i don't block wheels on really hard and fast braking (130mph -> 40mph every lap with less than 70m / 229 ft / 76 Yard). Smaller bore = more travel (not a lot) but more feeling (a lot).

A quick pedal is good for road and std pads, while uprated pad gets better when hot (if you manage to get the good temp on them during autocross) and need sensible pressure.

My only advice is to try to know what you like, bigger is not always better but could be :lol:
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93 RHD ST185 - 2.71kg/BHP
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Re: Brake Master Cylinder Options?

Postby Gary ST165 » Thu Apr 08, 2010 7:45 pm

bozo-merlin wrote:T18 wiht ABS are 1" bore, T20 with ABS are 1" bore

T18 without ABS are 15/16" bore, and T20 without ABS are ... 15/16" bore


Pedal feeling is better on the T20 MC+MV combo, why ? i don't know but when i tried i feel it, more response with only this change.

My car was ABS, now it's OUT, i tried T18 1" then T20 1" then T20 15/16" and with the last one and without ABS (on track off course) i don't block wheels on really hard and fast braking (130mph -> 40mph every lap with less than 70m / 229 ft / 76 Yard). Smaller bore = more travel (not a lot) but more feeling (a lot).

A quick pedal is good for road and std pads, while uprated pad gets better when hot (if you manage to get the good temp on them during autocross) and need sensible pressure.

My only advice is to try to know what you like, bigger is not always better but could be :lol:



great info ;)
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Re: Brake Master Cylinder Options?

Postby LegacyofDan » Wed Apr 21, 2010 12:48 pm

(subscribed) :D ...important information in this thread for me.
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Re: Brake Master Cylinder Options?

Postby camry90 » Thu May 13, 2010 5:10 am

ok thanks for info but what's the verdict...?
bigger bore for BBK or Smaller bore for BBW? i have a ST185 non-ABS.
i'm planing to have ST205 rear caliper and BBk in front(with more piston area than ST185 OEM)
should i go for the ST205 MC since it's meant to be used with bigger brake piston area...

ps. i am sorry if my post is confusion and redundant. :P
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Re: Brake Master Cylinder Options?

Postby LegacyofDan » Thu May 13, 2010 12:03 pm

i am a humble 21 year old that made taco brakes fit on an alltrac...so long as your stock MC is in good condition...it should be fine...my MC is non abs 185 one too ( my 165 one had a leak)and it builds plenty of pressure for the larger brakes......please dont base you decision off from what i have said here(since i have been driving this setup for a brief while now), it is just food for thought for ya.
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Re: Brake Master Cylinder Options?

Postby Rallly » Fri Feb 10, 2017 11:24 pm

Can someone give me an aftermarket part number for a new brake master cylinder for 91 all trac turbo please
?



bozo-merlin wrote:T18 wiht ABS are 1" bore, T20 with ABS are 1" bore

T18 without ABS are 15/16" bore, and T20 without ABS are ... 15/16" bore


Pedal feeling is better on the T20 MC+MV combo, why ? i don't know but when i tried i feel it, more response with only this change.

My car was ABS, now it's OUT, i tried T18 1" then T20 1" then T20 15/16" and with the last one and without ABS (on track off course) i don't block wheels on really hard and fast braking (130mph -> 40mph every lap with less than 70m / 229 ft / 76 Yard). Smaller bore = more travel (not a lot) but more feeling (a lot).

A quick pedal is good for road and std pads, while uprated pad gets better when hot (if you manage to get the good temp on them during autocross) and need sensible pressure.

My only advice is to try to know what you like, bigger is not always better but could be :lol:
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