Disc Brakes on rear?? any ideas
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Disc Brakes on rear?? any ideas
Hi
just wondering if anyone has fitted disc brakes to the rear of a standard back axle?
I have disc brakes fitted to front of mine but would like to improve the braking further by adding them on the rear also.
Is this possible?
just wondering if anyone has fitted disc brakes to the rear of a standard back axle?
I have disc brakes fitted to front of mine but would like to improve the braking further by adding them on the rear also.
Is this possible?
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- Minor Fan
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my strong advice would be don't.
there isn't enough weight to be able to use too good a rear brakes on a minor.
Best brakes needed on rear in my opinion are escort back axle 8 or 9inch drum braks with a servo.
there isn't enough weight to be able to use too good a rear brakes on a minor.
Best brakes needed on rear in my opinion are escort back axle 8 or 9inch drum braks with a servo.
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- Minor Fan
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I used to have vented discs on the rear of my Minor and it was way too much (was a kit for a Mk2 Escort). I have 280mm front discs (in 13" wheels) with 8" rear drums. The only problem is with fade of the rear drums during sprints at somewhere like Castle Combe at the end of lap 2, but that is breaking very hard from 140 mph at the end of the main straight and well over 125 at a few other places.
Rear discs not needed on the rear of a Minor for road use.
Martin
Rear discs not needed on the rear of a Minor for road use.
Martin
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I would not use the Minor axle with your Zetec engine. Uprating it just moves the inherent weakness elsewhere plus the brakes are poor enough to start with. Riley drums are an upgrade on the original, but in the end an Escort axle will probably be the cheapest route let alone more desirable for your power output.
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Re: Disc Brakes on rear?? any ideas
Well I'm planning to fit them to my car because they are self adjusting and just better brakes, However to make sure they are properly matched I am using callipers and master cylinder form the same car (Nissan Pulsar Ni6) Because it seems to me that the "problems"of rear discs on Morris Minors here are more likely to be about systems not configured properly rather than a problem with having all disc brakes on one of these cars.
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Re: Disc Brakes on rear?? any ideas
Unfortunately I think you've missed the point. Your Nissan brakes are only matched because they were engineered to match on that particular Nissan. On a Minor with completely different suspension, weight distribution, axle weight etc... you will just lock up the rear on hard braking and (as did others who advised) that to get them to work you have to split out the rear circuit and run at lower rear brake pressure if you want rear disks.However to make sure they are properly matched I am using callipers and master cylinder form the same car (Nissan Pulsar Ni6) Because it seems to me that the "problems"of rear discs on Morris Minors here are more likely to be about systems not configured properly rather than a problem with having all disc brakes on one of these cars.
If the Nissan master has differential pressure between front and rear, the pressure difference is likely to be non adjustable, so may end up needing to be changed to either a twin m/c set up with bias bar or a non-differential set up and a splitter/adjuster.
Ray. MMOC#47368. Forum moderator.
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Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
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Re: Disc Brakes on rear?? any ideas
I've got disc brakes front and back on my Morris and never had any problems of locking up the back end, the brakes consist of ford fiesta XR2 solid drilled and grooved with mk3 calipers. The rear are fiesta discs with granada Scorpio calipers so I can have a hand brake. I've also used the mk3 fiesta sevo and master cylinder grafted to marina pedal box, the system is also a duel circuit with reducers going to the rear. Oh the back axle is ford mk2 cortina and the engine is ford focus ST170 with gsxr 750 carbs!!
Stevie
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Re: Disc Brakes on rear?? any ideas
Ray
One of the reasons I want to run the discs is so that I can have the cross linked braking system that the Nissan has, namely the front right brake is mated with the rear left and Visa versa for the other wheels. This gives a far better emergency, partial brake fail redundancy than than either the usual Morris single circuit system or even the more common dual circuit system that that has the front and back separated. For the cost of running an extra hydraulic line to the back of the car having the best possible system is a no brainer.
Further I am pretty sure that given the fact that the Nissan is a FWD that its weight distribution is not that much different to a Morris insofar as both cars have their greatest mass ahead of the front axle line. To improve the weight distribution of my car I am fitting an all alloy Suzuki Swift lump which will weigh in at something less than half of the weight of a A serries engine.
Finally I hate having to adjust things like Brakes and with drums you have to do this constantly to keep them working well Disc's only require you to check for pad wear (and repalce as necessary) I know that these cars are easy to work on but do any of us want to be obliged to work on them when we could be getting more pleasure out of driving them?
Morris fixer
One of the reasons I want to run the discs is so that I can have the cross linked braking system that the Nissan has, namely the front right brake is mated with the rear left and Visa versa for the other wheels. This gives a far better emergency, partial brake fail redundancy than than either the usual Morris single circuit system or even the more common dual circuit system that that has the front and back separated. For the cost of running an extra hydraulic line to the back of the car having the best possible system is a no brainer.
Further I am pretty sure that given the fact that the Nissan is a FWD that its weight distribution is not that much different to a Morris insofar as both cars have their greatest mass ahead of the front axle line. To improve the weight distribution of my car I am fitting an all alloy Suzuki Swift lump which will weigh in at something less than half of the weight of a A serries engine.
Finally I hate having to adjust things like Brakes and with drums you have to do this constantly to keep them working well Disc's only require you to check for pad wear (and repalce as necessary) I know that these cars are easy to work on but do any of us want to be obliged to work on them when we could be getting more pleasure out of driving them?
Morris fixer
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Re: Disc Brakes on rear?? any ideas
You could try it and see if the balance is right and if the rear locks up maybe fit brake proportioning valve(s) to adjust the pressure to the rears. The cheap way to do this used to be to get a brake bias valve from a Mini from the breakers though I wouldn't recommend unknown parts in the brake circuit
Not sure if such valves would be suitable for split circuit as you described.
Eg
http://www.revolutionracegear.com.au/in ... imary&CDO=
Not sure if such valves would be suitable for split circuit as you described.
Eg
http://www.revolutionracegear.com.au/in ... imary&CDO=