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#2510276 - 06/19/18 12:59 AM Re: New Viper brake kit [Re: mopardude318]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
Originally Posted By mopardude318
anything available for a mustang 2 spindle?


I have no plans of ever making anything for a Mustang II spindle. Lots of other folks make brake kits for Mustang II. You shouldn't have any trouble finding stuff that will fit those spindles.

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#2519953 - 07/10/18 10:11 AM Re: New Viper brake kit [Re: AndyF]
challenger70 Offline
master

Registered: 03/06/03
Posts: 3272
Loc: Berwyn, IL
Shut up and take my money!! I have had gen 3 calipers since I got them from you before you stopped making the last kit. up
_________________________
'70 440/727/8.75 FY1 Challenger
'68 383/833/8.75 QQ1 Charger


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#2519973 - 07/10/18 11:21 AM Re: New Viper brake kit [Re: AndyF]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
Give DoctorDiff a call. I think he has all of the parts on hand now for these new Viper kits.

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#2520499 - 07/11/18 11:31 AM Re: New Viper brake kit [Re: AndyF]
challenger70 Offline
master

Registered: 03/06/03
Posts: 3272
Loc: Berwyn, IL
Why the FMJ knuckle vs the 73-76 A-body knuckle?

It seemed like everything was geared toward those before. For the 11.75 upgrade they even warned against using the FMJ knucles, "Do not succumb to the temptation to use “lookalike” knuckles from later Mopars, such as 1973-up B/R-bodies, F/J/M bodies, etc. These parts, while visually very similar, are taller, altering suspension geometry (camber change, bump steer, etc.), and possibly forcing the ball joints beyond their designed range, a/k/a “over angling”."

Just wondering if that was incorrect information or what the deal is as a layperson. shruggy Plus I already have a pair of the A body knuckles. This would be for a '68 Charger.



Edited by challenger70 (07/11/18 11:32 AM)
_________________________
'70 440/727/8.75 FY1 Challenger
'68 383/833/8.75 QQ1 Charger


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#2520515 - 07/11/18 12:03 PM Re: New Viper brake kit [Re: AndyF]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
If you have A body knuckles then use them. Given a choice, I prefer the FMJ, but A body should work. You might need to grind a little clearance for the caliper bracket when using the shorter A body knuckle. Just depends on the forging.

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#2520598 - 07/11/18 01:34 PM Re: New Viper brake kit [Re: AndyF]
challenger70 Offline
master

Registered: 03/06/03
Posts: 3272
Loc: Berwyn, IL
Is the potential grinding the only reason you prefer the FMJ Knuckle?
_________________________
'70 440/727/8.75 FY1 Challenger
'68 383/833/8.75 QQ1 Charger


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#2520732 - 07/11/18 07:05 PM Re: New Viper brake kit [Re: AndyF]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 13652
Loc: up yours
The A vs FMJ spindle issue has been rehashed here repeatedly.

It boils down to preference really. The quote you provide was an incorrect, off the cuff comment that had zero facts to back it up.

If you want numbers and facts

https://www.bigblockdart.com/techpages/spindles.shtml
_________________________
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.

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#2520740 - 07/11/18 07:29 PM Re: New Viper brake kit [Re: AndyF]
Bob J Offline
member

Registered: 11/16/16
Posts: 189
Loc: Colorado
Thank you for that page, I don't need it now but it might come in handy later down the road.
_________________________
07 Porsche C2 997.1 6spd DD and SCCA Solo II SS
68 Plymouth GTX Convert. 493cu Hotkiss Wilwood Classic air, Building for Solo II Cam
65 Chrysler 300 Convert. project
57 Desoto 2dr. Firesweep 392 Hemi,Wilwood Project with son
2003 Dodge Dakota R/T "DEAD"

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#2520778 - 07/11/18 08:56 PM Re: New Viper brake kit [Re: challenger70]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
The later FMJ knuckles are taller and lighter than the A body knuckle. Both of those are good things for a serious build. For a street car it doesn't matter what you use.

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#2520950 - 07/12/18 09:01 AM Re: New Viper brake kit [Re: Supercuda]
challenger70 Offline
master

Registered: 03/06/03
Posts: 3272
Loc: Berwyn, IL
Originally Posted By Supercuda
The A vs FMJ spindle issue has been rehashed here repeatedly.

It boils down to preference really. The quote you provide was an incorrect, off the cuff comment that had zero facts to back it up.

If you want numbers and facts

https://www.bigblockdart.com/techpages/spindles.shtml


up I am reading it now, thanks! My car will be more protouring than race so I will probably just stick with my A-body Knuckles, but keep an eye out for some FMJ if I happen upon them.
_________________________
'70 440/727/8.75 FY1 Challenger
'68 383/833/8.75 QQ1 Charger


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#2521188 - 07/12/18 06:33 PM Re: New Viper brake kit [Re: AndyF]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 13652
Loc: up yours
You are more likely to happen upon FMJ spindles than A body ones.
_________________________
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.

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#2521194 - 07/12/18 06:40 PM Re: New Viper brake kit [Re: Supercuda]
Skeptic Online   tonguue
master

Registered: 01/20/03
Posts: 4252
Loc: The Pale Blue Dot
Is anyone re-popping the FMJ spindles? Dr Diff sells re-popped A body ones.
_________________________
"Talking tough is easy when it's other people's evil and you're judging what they do or don't believe" Mike Cooley / Drive-By Truckers Razor and Tie Music (BMI)

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#2521223 - 07/12/18 08:05 PM Re: New Viper brake kit [Re: AndyF]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 13652
Loc: up yours
No need to repop FMJ spindles, but yes Fatman Fab makes a dropped one.

The FMJ spindles have been in production from 1973 till 1989 in B, F, M, J, R bodies.

The A body spindle is 73, 74, 75, 76.

Probably 15 FMJ spindles for every A spindle made.
_________________________
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.

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#2521254 - 07/12/18 09:10 PM Re: New Viper brake kit [Re: Supercuda]
Skeptic Online   tonguue
master

Registered: 01/20/03
Posts: 4252
Loc: The Pale Blue Dot
Good to know, I've got both so I'm not looking.

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#2521441 - 07/13/18 11:24 AM Re: New Viper brake kit [Re: Supercuda]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
Originally Posted By Supercuda
No need to repop FMJ spindles, but yes Fatman Fab makes a dropped one.

The FMJ spindles have been in production from 1973 till 1989 in B, F, M, J, R bodies.

The A body spindle is 73, 74, 75, 76.

Probably 15 FMJ spindles for every A spindle made.



There are a couple of different "FMJ" knuckles. I use the later style which is lighter weight. Either will work, but the latest ones are 1.5 lbs lighter. I think some engineer at Mopar finally learned how to use finite element analysis in the 80's since the last version of the knuckles shows that they took weight out of areas with no stress.

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#2521839 - 07/14/18 01:15 PM Re: New Viper brake kit [Re: AndyF]
moparx Online   content
Dreaming of implants

Registered: 09/03/03
Posts: 9141
Loc: north of coder
i'll bet i've done, and advised/supervised around 100 or so FMJ spindle conversions to date, and have encountered absolutely NO problems what so ever, including bump issues and "ball joint overextension". i respect e-boogers wisdom and knowledge, and really appreciate him writing up these articles [right now, he is doing a two part rear disc conversion in mopar action, using late model jeep components.] but his concern about the FMJ knuckle, in my opinion, is without merit. as to the fatman lowered knuckle, that is, from the pics i've seen, a pressed in pin to a flat piece of steel, welded to an upper balljoint tapered bung. i have never held one in person, nor do i know what material the plate, spindle pin, or balljoint bung, are made from.
beer

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#2521885 - 07/14/18 03:15 PM Re: New Viper brake kit [Re: AndyF]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 13652
Loc: up yours
Already did the rear disc swap myself on an 8 3/4.

Not too difficult.
_________________________
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.

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#2533232 - 08/08/18 10:15 AM Re: New Viper brake kit [Re: Supercuda]
challenger70 Offline
master

Registered: 03/06/03
Posts: 3272
Loc: Berwyn, IL
Ordered my setup from Cass, went with the 2 piece drilled/slotted bear's. Very happy to have another part of the Charger equation solved. Thanks to all involved. up
_________________________
'70 440/727/8.75 FY1 Challenger
'68 383/833/8.75 QQ1 Charger


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#2533250 - 08/08/18 10:58 AM Re: New Viper brake kit [Re: moparx]
TC@HP2 Offline
master

Registered: 01/23/03
Posts: 4862
Loc: Pikes Peak Country
Originally Posted By moparx
i'll bet i've done, and advised/supervised around 100 or so FMJ spindle conversions to date, and have encountered absolutely NO problems what so ever, including bump issues and "ball joint overextension". i respect e-boogers wisdom and knowledge, and really appreciate him writing up these articles [right now, he is doing a two part rear disc conversion in mopar action, using late model jeep components.] but his concern about the FMJ knuckle, in my opinion, is without merit. as to the fatman lowered knuckle, that is, from the pics i've seen, a pressed in pin to a flat piece of steel, welded to an upper balljoint tapered bung. i have never held one in person, nor do i know what material the plate, spindle pin, or balljoint bung, are made from.


The Fatman units are a bit scary looking, but they were designed for the street rod, fairgrounds cruising crowd. I did speak to someone once who had these and I asked him to weigh them. IIRC, they are something like 1.5-2# heavier than the A body spindle.

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#2533838 - 08/09/18 02:57 PM Re: New Viper brake kit [Re: AndyF]
AndyF Offline
Too Many Posts

Registered: 01/20/03
Posts: 24507
Loc: Oregon
I had a set of the Fatman knuckles for a while. I refused to put anything that ugly and stupid looking on my car so I sold them. I don't know if they work or not but they are as ugly as a high school shop project.

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