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MGB MGB Axles & Hybrid Rear End

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Just another "ligntening" hole! /ubbthreads/images/graemlins/jester.gif
 
I'm thinking that too - but I just can't figure out what MGB they were on...I only use the larger bore GT wheel cylinders on all my cars, GT & roadster, & have not seen this before...think I need to take a couple of photos tomorrow.
 
could it be from a different MG? Not a B?
 
No, its a B....well, maybe a C, hmmmmmmmm
 
Photos.

*MUST have imperical data!* /ubbthreads/images/graemlins/jester.gif
 
Manyana (misspelled probably)
 
Here they are, Doc...interesting little difference, eh?

(Not my mods, the tiny wheel cylinder locating hole next to the wheel cylinder bleed hole....see how one's centered & one's offset?)

backingplate01.JPG
backingplate02.JPG
 
Only difference I can see is the outer flange.
 
Look closely, Kenny at the 3 wheel cylinder holes in the center bottom of each plate...the tiniest hole is in a different place relative to the others (not different side - different location)
 
Yup. Locator hole for the roll pin in the wheel cylinder... all mine here are the "offset" ones. Weird. Would it be from a GT afterthey went to the 7/8" bore? That's ALL I can think of (as different).
 
I'm thinking pre-7/8 since I put 7/8 on everything...think I'll just relocate it...I mena, what's another littl hole gonna do with all the others I'm going to put in it?
 
yup. and that.n is *tiny* by comparison!
 
Got one of the backing plates down to less than a pound - & it looks real weird bolted up under the car...I'll get a photo tomorrow...oh, got the wheel cylinder locating holes relocated.
 
Ah... I see the hole now. Took a few looks. I was too busy at work today to spend much time on it. Yeah, I say dril a 'nother where it's supposed to be.

Can't wait for the pics... I notice you had circles drawn where I showed you the big one's in my suggestion.
 
Yep, I did, Kenny...if you look closely at the plate on the left, you can see some freehand circles
 
I see some freehand ~angles~ too! Ya want to NOT have anything other than radii on that plate, man. Stress risers, y'know.

While I think about it: Be conservative around the pivot points (cylinder and adjuster) as the forces on that part of the plate can tend to be non-linear as the shoes first apply resistance to the drums. Short version: The thing can buckle under even moderate braking.

You DO have spares ("unlightened" ones) ready and waiting, right?
 
I wondered about cutting the triangles but did it anyway - I'll keep an eye on them...yep, am cleaning up & building a set of 'non-mods' so all I have to do is pull the hub & swap entire brake assemblies.
 
*sigh*

Good.
 
Here ya go, Doc....1/2 pound backing plate without any of the brake components installed:

backingplate03.JPG
 
Wow, you gota do something about those mice, how about a garage cat?
 
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