Do all B-body front spindles have the same thread size? (promo wheel disc question)

[98 SNAKE EATER]

My '69 RR apparently had a front disc brake conversion using a mid 70's rotors and single piston calipers

I plan on getting a set of promo wheel discs, but I'm not sure if the supplied nut extension thingies will fit my current spindles :confused:

Also, I've seen a couple different versions of the wheel disc nuts floating around.

I assume the ones with the hollow caps are OEM?

 

[YY1]

I interchanged the bearing cage from a 66 B drum onto an M body rotor/race.

 

[98 SNAKE EATER]

I interchanged the bearing cage from a 66 B drum onto an M body rotor/race.

But are the threads of a B-drum spindle the same as a B-disc spindle?

I don't want to spend $400 bucks on a pair of promo discs and not have them fit

 

[YY1]

Don't sue me if they're not, but the B drum spindle threads were the same as the M disk spindle threads.

 

[98 SNAKE EATER]

OK, so today while tearing down the rear end, I started eyeballing the front spindles to see what other options I had for mounting hardware :edgy:


Hit up O'Reillys for a couple of 3/4-16 spindle nuts with slotted heads, then rummaged through my spare hardware bin for some bolts, nuts and washers.

Started off by centering a washer on a 5/16" bolt/nut and tightening it down before welding the nut to the washer

Once the nut was welded on the washer, I flipped it upside down in the new spindle nut, ran a bolt through it, tightened it up, then welded the washer in place

The spindle had enough threads on the end to play with, so I tightened it up over the stock nut and it was good to go

Checked it with a level and the head is flush with the inner wall of the rim, just below the lip.

Once I have the discs lasered out, I can add the freeze plugs to see if I need any extra shims to clear the valve stem and wheel weights, but that's what I have so far.

 

[tallhair]

I'm liking this thread. Thanks snakeater

 

[98 SNAKE EATER]

Lasered discs done today, test fit and test driven up to ~100mph without issue

My buddy's doing the artwork and the proofs he sent look very close to the original

 

[98 SNAKE EATER]

A few shots of the dust caps.

I'll most likely be adding a piece of glue lined heat shrink over the dust cap to help seal the gap :cool:

 

[YY1]

Very creative.

I like engineering challenges like this.

 

[98 SNAKE EATER]

Short silly video

http://www.youtube.com/watch?v=ztxcTP9tBuM

 

[98 SNAKE EATER]

OK, I'm looking into another option for the dust cap cover.


All of the freeze out plugs I've found appear to be dome shaped and requires a little smush on the hydraulic press to flatten it out a bit before drilling and mounting the discs.


After rummaging through a parts bin in my shop, I grabbed a couple of grease tubes, yanked the caps, drilled a center home and poof, perfect flat fit :cool:

The company that makes these caps had their logo stamped on the back, so I contacted them for pricing.


I'm sure whatever it is, it'll be cheaper than actual freeze out plugs

 

[98 SNAKE EATER]

Welded up some new mounting hardware

Not that there's anything wrong with my initial hardware, it's just that these nuts are cheaper and give me more surface to weld on :cool:

 

[98 SNAKE EATER]

Decals are in

 

[98 SNAKE EATER]

Installed

 

[98 SNAKE EATER]

Video from earlier today ;)


http://www.youtube.com/watch?v=9jj4Vv8l7DQ

 

[98 SNAKE EATER]

Another video from earlier today

http://www.youtube.com/watch?v=EBcRIRYWRHM

 

[tallhair]

That is too cool Snake Eater !! 99.9999% of folks who see those will have no idea these things ever existed. I'm sure you will be getting tons of thumbs up, questions, etc running around with those things. You might consider moving the wheel weights to the inside on next balance.

Are you gonna make extras for friends

 

[98 SNAKE EATER]

That is too cool Snake Eater !! 99.9999% of folks who see those will have no idea these things ever existed. I'm sure you will be getting tons of thumbs up, questions, etc running around with those things. You might consider moving the wheel weights to the inside on next balance.

Are you gonna make extras for friends

I never liked the idea of static balance, so I'll most likely just black out the weights.

As for making more, I have a feeler thread posted on the A12 forums.

PM for details

 

[tallhair]

I'll check it out. Loved the vids btw and hope you keep posting your ideas and mods

 

[98 SNAKE EATER]

Made a short installation video

http://www.youtube.com/watch?v=b9DyHgNJ-lQ