Hawkeye STI brakes
14 February 2010, 11:24 AM
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Hawkeye STI brakes
Hi all,
Bought an STI yesterday and absolutely love it just one question though are the brakes meant to be really sharp as soon as you touch the pedal or have you got to push really hard to get it to stop. My Z4M Coupe were very powerful without pushing too hard. Surely Brembos all round should give you a confident powerful feel when you push the pedal. The cars only done 12,000 miles so I'm sure it does not need discs or pads yet.
Bought an STI yesterday and absolutely love it just one question though are the brakes meant to be really sharp as soon as you touch the pedal or have you got to push really hard to get it to stop. My Z4M Coupe were very powerful without pushing too hard. Surely Brembos all round should give you a confident powerful feel when you push the pedal. The cars only done 12,000 miles so I'm sure it does not need discs or pads yet.
14 February 2010, 01:50 PM
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Yes thought it might be the servo. Might try the braided hoses. Is it worth doing? Yes BMW do like powerful servos.
The wifes going to drive it so wouldn't mind them a bit better.
Pads must be original as it's such low mileage
The wifes going to drive it so wouldn't mind them a bit better.
Pads must be original as it's such low mileage
14 February 2010, 02:01 PM
#5
The over-braid prevents the flexi hose from bulging, thus keeping a lot more hydro pressure in the lines and so delivers more pressure to the piston/pad interface and therfore, ultimately, more clamping pressure on pad/disc interface...
Last edited by joz8968; 14 February 2010 at 02:03 PM.
14 February 2010, 03:18 PM
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Thanks will look into replacing them with braided hoses. Bit disappointing though. Thought the brakes would have felt so different to my bugeye WRX but to me it still feels like they're a bit weedy.
14 February 2010, 03:25 PM
#7
The Impreza brake system is well known for being inherently ineffective. 
Only bigger calipers (more pots) and larger discs/better pad compound can mask its inherent weaknesses (i.e. the greater the clamping area/more leverage are the 2 most influentual things for better braking performance).
Only bigger calipers (more pots) and larger discs/better pad compound can mask its inherent weaknesses (i.e. the greater the clamping area/more leverage are the 2 most influentual things for better braking performance).
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14 February 2010, 08:03 PM
#9
Yeah, to be fair, the basic system still has its roots from 1992! As we know, tyre and brake technology has moved on apace since then, and continues to do so.
That said though, they are crap compared to other marques' contemporary braking systems of the time (bearing in mind the car's performance!)
That said though, they are crap compared to other marques' contemporary braking systems of the time (bearing in mind the car's performance!)
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