DOT5.1 - boiling point 270degC dry, 185degC wet. (5.0's the silicone stuff that's not miscible and impossible to bleed)
LHM - boiling point 250degC. No "wet" figure, since it's not hygroscopic.

Seems like a lot of work for VERY little benefit. Bolt finned heatsinks to the calipers?

Engineer a 2nd set of discs onto the hub end of the driveshaft.

Or just lob an anchor out the boot?

5.1 was what I meant!

Second set of discs would require more leverage on the pedal, given the extra piston area...So to engineer the solution would probably require a really long pedal or some assistance, basically something that I wouldn't aid reliability. Probably just easier to fit GS brakes (to the GS box), move the push rod up on the pedal to get the same pedal feel as a 2cv and re-build the callipers with Axel seals (seeing as they require a rebuild either way) and that the rest of the car is 5.1 already?

When you say the rest of the car is 5.1, are you using master cyl and rear cyls from a drummer? If so you'll run into the same front/rear imbalance issue that I've got.

Louis,
an extra set of discs would give twice the braking effort for the same pedal pressure, however your problem would be with pedal travel, not leverage.

Twice the surface area of caliper pistons demands that twice the volume of fluid needs to be moved by the master cylinder, but the system pressure stays the same.

This 'extra set of discs' suggestion is purely hypothetical, one must assume...

ken

What set of fronts are you using? GS? And yes I think they must be off a drummer.

What is the issue with the imbalance, does It brake like a kart or not at all? May have to look at a pressure regulator if the former!

So you'd require a larger master cylinder to keep the travel the same? For example using a 20mm bore master cylinder as opposed to a 17mm, if the piston size was 45mm not 42mm?

And if aiming for the same input and output characteristics then the leverage would surely have to change to account for the other changes in the system?

I've got GSA front discs and calipers, and the standard LHM rear cylinders. My problem is the fronts are much more powerful so the front wheels lock up before the rears are doing much. I've just looked at ECAS and actually the DOT rear cylinders are 17.5mm, whereas the LHM ones are only 16mm, so you may be alright actually.

I've been meaning to put a pair of acad cylinders on mine that are also 17.5mm but LHM. Bought some over a year ago, still not got around to fitting them.

Yeah I guess it'll lessen the effect if nothing else, both the LHM or DOT sets would be larger with it being an Ami, same as acad. I can't wait to go and find out how the brakes work, so much so that the engine wiring, or rather removal of shit I didn't need from the engine wiring is all done, bar three wires that need to be spliced into the car loom.