My brakes rubbish

[dan182]

My g40 has standard brakes with good ridge hoses if I put 22 mm master cylinder will them be better brakes

[JoeH]

No, they'll be better with fresh fluid, maybe dot5.1, may reduce sponginess
but the best thing to do is fit decent brake pads, such as Ferodo DS2500
standard discs, and make sure everything (calipers) is in good working order.

[scotsjohn]

As Joe suggests, make sure what you have is in good order; standard discs are cheap and easy to come by and the Ferodo pads are a good bet. Clean drums with the shoes adjusted to a minimum clearance make a big difference to pedal travel. Fresh fluid and a thorough bleed are a must although I'd not go to DOT5 unless you're going to be renewing the fluid on an annual basis as it's pretty hygroscopic. Mercedes do a DOT4.5 which gives a two year life.
22mm cylinder helps, but you lose a good bit of feel. If you want to do a decent upgrade though, then the 256 and TSR 270 conversions are the way to go; plenty of info on threads here.

[dan182]

Thanks already done fluid change discs are good so I might change pads and shoes

[hayesey]

Clean drums with the shoes adjusted to a minimum clearance make a big difference to pedal travel

this is so important.  No matter what you do to the front brakes, if the rears are knackered then it'll have a bad effect on the whole braking system.  New drums, shoes and fitting kit will do wonders.