Braking problem, help
#1
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Braking problem, help
Hi all, I have an annoying problem with my 94 classic wagon, the problem is when i really push it (full boost right through the gears) Then when i need to slow down quickly the brake pedal goes solid and i have a job to stop the ******! The brakes work fine under normal conditions it's just when i've been giving it some. Any help would be greatly received, cheers
#2
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Do you still have the OEM sliding caliper 2-pots. If so, there's your answer! They're TERRIBLE at stopping from speed. They cause the car come to a gradual halt, rather than stop briskly!
Upgrade to the OEM 4-pots/295mm disc set up (if on a budget). Significantly better, but still lack ultimate stopping power.
Otherwise see Apex's GB on the K-Sport kit (you'd need a minimum of 17" alloys for the smallest 330mm kit though...)
Upgrade to the OEM 4-pots/295mm disc set up (if on a budget). Significantly better, but still lack ultimate stopping power.
Otherwise see Apex's GB on the K-Sport kit (you'd need a minimum of 17" alloys for the smallest 330mm kit though...)
Last edited by joz8968; 14 February 2010 at 12:29 PM.
#4
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Check on here or eBay. They're much cheaper these days... just concentrate on a set of used calipers... but... get a set of new 295mm discs. Loads of options (depending on budget) available....
Get plain, grooved, dimpled, or grooved/dimpled discs. Don't get x-drilled ones as most have the holes put in AFTER the casting process and can cause radiating stress fractures if too much heat is put into the disc from violent heavy braking etc....
Get plain, grooved, dimpled, or grooved/dimpled discs. Don't get x-drilled ones as most have the holes put in AFTER the casting process and can cause radiating stress fractures if too much heat is put into the disc from violent heavy braking etc....
Last edited by joz8968; 14 February 2010 at 12:48 PM.
#5
the problem is when running at boost for long periods there is no vacuum in the inlet manifold so the servo won't work. Its like braking with no engine running, a couple of pumps & you're out of vac. My wagon has the same problem, only thing is not sure how to cure it.
Last edited by impreza320; 14 February 2010 at 01:19 PM.
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does the newage have a better vacuum system then to the old classic ? i know it has more braking with brembos and bigger discs but it must have better way of utiliseing it ? or is it the same after a full boost run.i had to stop today from 90 mph quite quick and it was a bit hairy(even with brembos and ds2500)brown trouser moment.
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does the newage have a better vacuum system then to the old classic ? i know it has more braking with brembos and bigger discs but it must have better way of utiliseing it ? or is it the same after a full boost run.i had to stop today from 90 mph quite quick and it was a bit hairy(even with brembos and ds2500)brown trouser moment.
#12
i don't know why other people haven't experienced the problem, it doesn't matter how big the servo is if there is no vacuum there's no brakes. turbo diesel vehicles have vac pumps to get round the problem, or the other soloution would be a servoless system! who knows
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I wonder if there is a way of fitting a vacuum pump to the impreza engine? Would be well worth fitting if it was possible.
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