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front discs

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rimzimmer

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Hi, i know there is a front brake upgrade for a mgb that uses rover sd1 callipers, i have these but wondering what discs to use is there any vented discs for the B? what about the V8 what did they use? also what mounting bolts are best to use, i have been told before but have forgoten will write it down this time!
thanks
Andy
 
Yep, it can be done:

To install the Rover SD-1 4-pot calipers on the MG stub axles, I used TR8 bolts that fit the holes in the calipers as the sleeved portion of the stock MG brake caliper bolts are smaller in diameter than the holes in the calipers. One other problem to overcome is the threads in the Rover calipers: they're different than the threads on the MG braided stainless/teflon brake hoses. So, you'll have to have hoses specially made.

& I used MGB V8 rotors.
 
Putting more powerful brakes on the front of the car will upset the balance. You will need to uprate the rears as well, only by how much will be a guessing game. The stock brakes in good order are more than adequate for the weight of the car. Braking ability was never an issue for these cars. If you can lock all the wheels (which you should be able to) then more power will add nothing but a hole in your wallet! If you're looking for less fade in performance situations, consider EBC pads.
 
I have the wilwood brake kit from whoa brakes
https://www.whoabrakes.com/

It installs easily, works great, works with original disks. The kit includes a custom hose adapter to work with the MG hoses.

Driving on the street or the track, I am impressed.

The factory brakes are more than good enough for a B. If the system is working as it should, there is no needs for the upgrade for most drivers.

The new brakes do stop shorter, firmer, no rear wheel lock, no front/rear bias problems, no downside I can see.

some of my pics of the kit (prototype)

https://www.geocities.com/yellow_mgb/mgb/brakes_wilwood/
https://www.geocities.com/yellow_mgb/mgb/brake_web/

Just my 2 cents

Paul
 
I've looked at the Whoa kit as well, looks very nicely done and alot of kit for the money.
 
i currently am running the slotted/cross drilled rotors with v8 brake pads from brit tek and love them
 
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]Putting more powerful brakes on the front of the car will upset the balance.[/QUOTE]

Steve's absolutely correct - either a proportioning valve or disc brakes on the rear - will be needed if you go to the 4-pot SD1 calipers..

&, Paul & Hap, I'm beginning to think the same thing about the Whoa kit!
 
I bet it's less impact on brake balance than one would think, after all the rear brakes only make up a small percentage of the bias. In our younger days with the Huffaker MGB race car, we got the bright idea to put the brake bias at 50/50, it blew the pistons out of the rear wheel cylinders in two laps. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
 
I've been eyeballing Wilwood's site. I've noticed that they now have brake calipers that are intended for use on the rear. They come complete with mechanical actuators for use with cable operated parking/E-Brakes.

Wilwood's rear brake caliper, plus Tony's rear disc brake mod's could pan out to a much more elegant rear disc conversion than any of the "kits" I've seen, or Tony's rear disc brake conversion alone. After all, fewer required parts tend to make things a bit less complicated. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
 
Hi Hap

After you blew out the rears on your race car what ratio did you settle at? Also what masters were you using?

You obviously know a fair bit about the early Huffaker program. I have the adjustable rear dampers and front and rear sway bars that I believe are from Huffaker. Anything interesting you can share about the Huffaker car you had?
 
I installed a set of drilled and slotted rotors, and that helped greatly with the fade when using the brakes a lot. I think I got the pair for about $100.00 or so, but that was several years ago.
 
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