I am thinking about fitting disks, do I need to fit a booster? The drum brakes need plenty of pedal pressure to stop, surely the disks can't be worse.

Nope. I prefer my brakes without a booster!

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http://www.youtube.com/user/Hanras

I think the general consensus is no booster with 8.4 inch discs, but use a booster with the 7.5.

Having said that, there are plenty of people who use no booster with the 7.5, because they don't like the mushy feel. It's really up to your preference. If you're going with 7.5's, put the discs in first, and if it's too firm, stick a booster in.

I'm not using a booster with my 7.5's.

They're fine. Though if your other half is driving the car I would recommend one. They take a bit of force.

Depends on the pads you intend to fit. It does take some getting used to if your other daily drive is an over braked touchy Volvo or Toyota. I must admit I've had a few of these moments in the Mini but it always pulled up fine.

For the record I've got boosted 8.4" discs on the Rover and non boosted on the other Mini with 7.5" 4 pots and for spirited driving I much prefer the non boosted brakes. For a daily commuter i would lean towards boosted discs.

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1970 Mini Deluxe - 1275, Weber, Clive 346 cam, MS 4-pot slotted discs, Megajolt ignition Now with new improved Mambas... almost on the road
1966 Van with Traveller rear seat conversion
2008 Prado GXL
All in various states of repair...

I had one fitted, used to need a good stomp

You get much better feel without the booster, but at the cost of having to push harder.

I would never fit a booster while I still have two good legs!

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Too many cars, and too little time.

I have 7.5s with no booster. I have fitted EBC greenstuff and it's like having a booster.

I have one with 8.4's and one with 7.5's both without booster. However the moke will get 8.4's with a booster (Rover master/booster). Maybe I've gone soft?

I'll let ya know what I prefer once the Moke is done.

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Never used a booster on my 7.5"s and never felt the need for one.

cheers

Jacob

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'72 Clubman Van - 1022cc, 295 head, 731 cam - Daily Driver
'69 Morris 1100 S - Dinged by a bus, in shed under repair
'64 Morris 1100 - Early 1100, long term project

same as Jacob,

never found the need for it, on either my 7.5 or 8.4 discs..

Personal preference for all tho, like previously mentioned..

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Bluey-1973 Clubby - 1330, high lift, big cam, 7 port madness in progress..

Gumby-1978 Minivan, British Racing Green - 1310, high lift, mild cam, enlarged porting and chamber shape with big valve head, supercharged build in ever slow progress!

I don't run one with my 7.5" discs (using greenstuffs or blackstuffs) but I'm putting a recond one in the van for the missus.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I find it much easier to modulate the brakes when driving hard (with either foot as needed) without the booster. Like said, its all about the feel and with two good legs, I don't need a booster.
cheers
michael

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

I'm glad to hear the booster is a preference thing. as I'm going from drums to 4 pot 8.4's
One thing I never hear mentioned is the master cylinder. would it be a good idea for it to be changed if going from drums to discs? And is there a benefit to increasing or decreasing the size of the bore in the master cylinder?

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Nav my 1275LS is 8.4 with no booster and seems fine to me. Get in touch if you want to take it for a spin round the block. It is not 4 pots but should give you an idea.

My Postcode is 4500..

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Cheers
Alec
1275LS - July 78 - XNFAD18Y/102918