Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Brake Proportioning Valve Location

Your car and of course totally your call but I would suggest your chasing a problem that isn’t there and I hate to say it going to induce another one. Unless your car is for track type use then a load proportioning valve is going to cause more problems.

It’s used in conjunction with different tyres, suspension and track conditions, even variation from track to track to fine tune the braking system. Effectively what is optimum on one day won’t be the next.

Fit the Mulfab discs and upgrade your calipers by all means but please give considerable thought to fitting a load proportioning valve.

BR
Colin

Hi Colin, many thanks for the much needed memory refresh, given I ever had a poor memory and it seems advancing years offer no improvement on that situation.

Sorry to have misrepresented your brake system mods..Duh..! I think around that time there were a few companies marketing caliper "upgrades." You may also remember around the time I was also not keen on modifying Morgans, having adopted a more Vintage set of values relative to old cars, and having spent a number of years modifying my own machines to a state of imbalance relative to the original design capabilities of the machine. Additionally it seemed that there were quite a number of Morganeers who wore modification as a badge of honour, and in the process created some mods that potentially spoiled their enjoyment of DRIVING the machine, perhaps to the extent it became more or less a garage queen or was sold, having spent a great deal of money to create their idea of perfection, that ended up driving like a three legged horse...? Been there done that, more so on m/cycles than cars..Duh !

For sure it would seem there can be no easier car to modify than a Trad Morgan, but rather than drift off as is my tendency.. improving on the quality of Morgan engineering standards and material choices if engaged upon with educated consideration to the knock on affect overall with the rest of the functions of the car, can no doubt be very rewarding.

In the case of your choices Colin there was never any "debate," my sincere apologies if you thought it so. I would consider myself a fool to think I could come anywhere near your skills in so many areas of automotive engineering, or vehicle handling.... As you may remember we drove in company over some interesting Tarmac, during which time I kept a weather eye on you whether in front or behind, and if the latter, ever wary...(-: Fortunately for me Colin, I was never stupid enough to be tempted into a comparative test of driving skills... Happy days..

Colin, sage words as ever. Merry Xmas.
John

George

I loved the logic of your debates, always full of sound reasoning and well thought out. Never ever in any way offended by you testing my thinking pal.

Cheers to you and Sandra

BR
Colin

Excuse my ignorance, but is there any way to ensure a non warping de-stress of the metal in new discs?

Asking as I had new discs fitted in late October having lived with warped discs for a fair few miles and wanting to prevent a recurrence - if possible.

Hi Paul

I am no metallurgist but I suspect there is little that we as motorists can do apart from gently breaking them in (no pun intended) then increasing gradually the heat cycle during use.

What Peter Mulberry was talking about is the old school manufacturing method where castings would be left to weather before machining, cylinder blocks and brake disc rotors being examples. Today’s speed up world they are cast in the morning, machined at lunchtime and fitted in the afternoon kind of thing, JIT Manufacturing has a lot to answer for ;-).

Thing is if your new discs do show signs of a warp they can be reground and they will be fine. Simon (SiFab) or Cain (Wolf) would probably know of a good contact for disc grinding. Peter M who is retired arranged for a few sets to be ground for me but these were sold to Cain when he bought my king pin business and stock of spares.

BR
Colin

Colin ..... my racer uses Triumph GT6 discs ..... but they're 'skimmed' from 13mm thick to 7mm .... brake man was slightly taken aback to be asked to do that ... and at the bags of swarf chippings that came off .... then once they're drilled they're suitably light 🙂 .... his machine skims both faces simultaneously, which he claims is the way to go for trueness.

When I lived in the States I was talking to an old engine guy who reckoned that the V8 blocks that Chevy used on their racers were left in the yard to rust as bare castings for a year .... then pulled in and machined ... all to de-stress the castings for maximum strength.

K

It is my understanding In, 2012, Morgan adopted these calipers for the uprated Baby Doll Plus 4s. As my car is a wide bodied plus 8 with around 260 bhp , I don’t think I need to be too concerned about over braking . The vents will add the bit extra cooling for the odd track day & these brake kits are much the same price as the Factory ones .

Thanks Colin,

Now I understand.

Is there any benefit from getting the Mog discs drilled?