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BIG DOG ROTOR 11.75 X 1.25 #1352971 12/17/12 01:36 PM 12/17/12 01:36 PM
Joined: Jan 2008 Posts: 220 Forth Worth, Texas, USA TheRamMan OP enthusiast
TheRamMan OP enthusiast Joined: Jan 2008 Posts: 220 Forth Worth, Texas, USA	THE BIG DOG( 1.25 THICK ) ROTOR IS BEING FINALIZED...FITTING 2 SPINDLES 70-72 DISC SPINDLE 73- UP SPINDLE 1) REQUIRES LARGE PIN CALIPER BRACKETS( CHRYSLER PREVIOUSLY MADE ) 2) REQUIRES WIDE MOUTH PIN CALIPERS ( CHRYSLER PREVIOUSLY MADE ) 3) YES THIS MEGA ROTOR WILL BOLT RIGHT UP...WITH ALL 100% AVAILABLE CHRYSLER PARTS.....IT DWARFS THE STANDARD 11.75 ROTOR WHAT DO YOU THINK wayne@theramman.com

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: TheRamMan] #1352972 12/17/12 04:12 PM 12/17/12 04:12 PM
Joined: Jan 2003 Posts: 28,068 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,068 Irving, TX	You're making a truck/van rotor with passenger car bearing bosses? We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: TheRamMan] #1352973 12/17/12 04:26 PM 12/17/12 04:26 PM
Joined: Jan 2003 Posts: 31,051 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,051 Oregon	That is a good idea. I thought about doing it myself a few times but never pulled the trigger. It is the easiest way to get more brake capacity under a 15 inch wheel. With a 1.250 rotor the Viper caliper will bolt right on without requiring any pad spacers. There are some other aftermarket calipers that are also designed for the wider rotor. I'll pick up a pair when they're available just so I can check them out. Hopefully you stick with the stock 11.75 nose so stock wheels bolt on. I assume the factory bearings and seals will also fit.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: feets] #1352974 12/17/12 04:26 PM 12/17/12 04:26 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: You're making a truck/van rotor with passenger car bearing bosses? C Bodies used 1.25" thick rotors & the bearing sizes were the same as other passenger car rotors... To line up the caliper bracket on a B,E,A spindle requires spacers to get proper centering of the caliper bracket over the rotor but it gives you huge rotors for a reasonable cost.. "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: 1_WILD_RT] #1352975 12/17/12 04:37 PM 12/17/12 04:37 PM
Joined: Jan 2003 Posts: 28,068 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,068 Irving, TX	Quote: Quote: You're making a truck/van rotor with passenger car bearing bosses? C Bodies used 1.25" thick rotors & the bearing sizes were the same as other passenger car rotors... They used the same truck/van bearings if I recall correctly. I know my 72 Imperial has the thick rotors and truck/van bearings. The Imperials had two piece hubs and rotors with a larger bolt pattern and center register. We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: feets] #1352976 12/17/12 05:45 PM 12/17/12 05:45 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Well, I haven't looked at the 72-73 stuff but the I bolted a set of 70 C body rotors on a set of 70 E body spindles & it was a direct bolt on... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: 1_WILD_RT] #1352977 12/17/12 07:16 PM 12/17/12 07:16 PM
Joined: Jan 2003 Posts: 75,070 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,070 U.S.S.A.	Quote: Well, I haven't looked at the 72-73 stuff but the I bolted a set of 70 C body rotors on a set of 70 E body spindles & it was a direct bolt on... Imperials generally had different parts vs. the run of the mill C barge. So the only thing I can guess is mr. ramman discovered a supplier for the C body rotors ????

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: JohnRR] #1352978 12/17/12 07:59 PM 12/17/12 07:59 PM
Joined: Jan 2003 Posts: 31,051 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,051 Oregon	C body rotors use a different combination of bearings than ABE body cars. The difference depends on the year but there aren't any direct cross overs. Either the inner wheel bearing is different or the outer one is different. The '73 C-body rotor works with a bearing sleeve, but the best way to do it would be to start with the same raw casting but machine the bearing bore slightly smaller for the ABE outer wheel bearing. I assume that is what RAMMAN is doing but I can't tell without a picture. I'd have to look up what the '72 and earlier C body rotors used for bearings. The outer one might be the same on those but the inner is different? But those rotors are a lot more expensive than the '73 style.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: AndyF] #1352979 12/17/12 08:16 PM 12/17/12 08:16 PM
Joined: May 2005 Posts: 4,744 Florida BDW master
BDW master Joined: May 2005 Posts: 4,744 Florida	Does just increasing the rotor thickness make that much of a difference? Or is the point to change the caliper too? What is the standard 11.75 thickness? 1"?

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: BDW] #1352980 12/17/12 08:26 PM 12/17/12 08:26 PM
Joined: Jan 2007 Posts: 2,431 SK,Canada gregsrt top fuel
gregsrt top fuel Joined: Jan 2007 Posts: 2,431 SK,Canada	Which calipers would they need? Last edited by gregsrt; 12/17/12 11:43 PM. An association of men who will not quarrel with one another is a thing which has never yet existed, from the greatest confederacy of nations down to a town meeting or a vestry. Thomas Jefferson

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: BDW] #1352981 12/18/12 01:29 AM 12/18/12 01:29 AM
Joined: Jan 2003 Posts: 31,051 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,051 Oregon	It adds about 25% more mass (weight). So that is a good thing if you're cooking the brakes. If the brakes aren't overheating then there isn't any reason to add the extra weight. This would be a great setup for a fast car that is limited to 15 inch wheels. Or a heavy, powerful car with 15 inch wheels.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: AndyF] #1352982 12/18/12 01:55 PM 12/18/12 01:55 PM
Joined: Jul 2009 Posts: 413 Norway (old world) Oyvind Mopar mopar
Oyvind Mopar mopar Joined: Jul 2009 Posts: 413 Norway (old world)	Quote: With a 1.250 rotor the Viper caliper will bolt right on without requiring any pad spacers. There are some other aftermarket calipers that are also designed for the wider rotor. Andy: Will the Viper calipers really bolt on to the typical B/E spindles? Are special wheels needed to clear these calipers?

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: Oyvind Mopar] #1352983 12/18/12 03:22 PM 12/18/12 03:22 PM
Joined: Jan 2003 Posts: 75,070 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,070 U.S.S.A.	Quote: Quote: With a 1.250 rotor the Viper caliper will bolt right on without requiring any pad spacers. There are some other aftermarket calipers that are also designed for the wider rotor. Andy: Will the Viper calipers really bolt on to the typical B/E spindles? Are special wheels needed to clear these calipers? Andy makes an adapter that allows the caliper to bolt on , though I'm not sure if that is for use with a 10" drum spindle ? I think it requires a 17" wheel , the caliper is pretty big . Maybe I should let Andy answer?

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: AndyF] #1352984 12/18/12 05:27 PM 12/18/12 05:27 PM
Joined: Dec 2006 Posts: 3,533 Indiana F Fury Fan master
Fury Fan master F Joined: Dec 2006 Posts: 3,533 Indiana	TO touch on some things a bunch of other people have said: I've spent a lot of time perusing parts-store websites and bearing & seal catalogs in teh quest for 1. a cheap alternative to teh $150 69-72 c-body rotor, and 2. an 11" rotor that can be fitted onto a drum spindle so that it can all fit behind 14" wheels. All my efforts got stumped by either a different rotor that had narrow application and was just as expensive or I found a cheap rotor but couldn't find a seal that was compatible. Data: 65-70 C-drum, 69-72 C-disc, 70-72 Challenger: A2 and A6 bearings (disc or drum for Chally? My notes don't specify but probably drum, I'd have zero interest in putting E-body drums on a C-body drum-spindle ) 73 C-disc: A16 and A17 bearings 73-74 Chally: A2 and A17 bearings Last edited by Fury Fan; 12/18/12 05:29 PM.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: Fury Fan] #1352985 12/18/12 07:02 PM 12/18/12 07:02 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	I'm trying to fit 1998 - 2002 Lincoln Town Car/Crown Vic rotors and calipers, which are pretty inexpensive, on my '64Dog D100. They are 12.5" diameter, the calipers are two piston. They do require a 16" wheel, and have a 5 on 4.5" bolt pattern. I haven't scienced out the brake hoses yet. I'll use the D100 hubs as the Lincoln rotors do not include hubs. The Scarebird kit for my truck uses the 11.5" '97 LTC/CV rotors and a Chevy half ton caliper, with a chevy van hose. I should probably do that first but hate to spend $ twice and I already have the 12.5" rotors taking up space on a shelf. You guys might try looking at a D100 hub for the C-bodies, I think there might be some commonality on bearings. R.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: dogdays] #1352986 12/18/12 07:12 PM 12/18/12 07:12 PM
Joined: Dec 2006 Posts: 3,533 Indiana F Fury Fan master
Fury Fan master F Joined: Dec 2006 Posts: 3,533 Indiana	The problem with most modern rotors is that they are too flat - the 'hat' section is not tall enough to get the caliper back from the mountig surface, back into the rim. Modern cars have flat-faced wheels that account for this. The 98-02 Vic rotor is one of the few that I've found to hold some promise, but yeah, it requires 16" wheels. It's also nice and thick, similar to a C-rotor. And it's doggone cheap! I have a setup like this for research, but the packaging for a caliper bracket adapter plate is kinda ugly. I've looked at every combination of drum spindle, disc spindle, Vic caliper, C-body bracket & caliper, M-body bracket and caliper, and haven't found anything yet that I like. The C-body hub works fine with this rotor after the drum is taken off (and that's 1 key to preserving OEM validation on the bearings and seals). Just need to enlarge the Vic rotor boltholes a bit. If that rotor were 1/2" taller it would make a huge difference! Last edited by Fury Fan; 12/18/12 07:13 PM.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: Fury Fan] #1352987 12/18/12 07:13 PM 12/18/12 07:13 PM
Joined: Jan 2003 Posts: 3,575 The Netherlands BigBlockMopar master
BigBlockMopar master Joined: Jan 2003 Posts: 3,575 The Netherlands	I've mounted the 11.75" 1.25" 1973 Chrysler rotors on older drumbrake spindles, and even 'upgraded' my '73 Dart with these rotors recently. Here's an old topic of mine where I install the '73 rotors onto my '62 NewYorker-wagon for those interested; https://board.moparts.org/ubbthreads/showflat.php?Cat=0&Number=5446979&an=0&page=1114 Topic with '73 Dart and Chrysler discs; https://board.moparts.org/ubbthreads/show...rue#Post7387701 BigBlockMopar.com

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: JohnRR] #1352988 12/19/12 12:52 AM 12/19/12 12:52 AM
Joined: Jan 2003 Posts: 31,051 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,051 Oregon	Quote: Quote: Quote: With a 1.250 rotor the Viper caliper will bolt right on without requiring any pad spacers. There are some other aftermarket calipers that are also designed for the wider rotor. Andy: Will the Viper calipers really bolt on to the typical B/E spindles? Are special wheels needed to clear these calipers? Andy makes an adapter that allows the caliper to bolt on , though I'm not sure if that is for use with a 10" drum spindle ? I think it requires a 17" wheel , the caliper is pretty big . Maybe I should let Andy answer? The early Viper calipers bolt to the late drum knuckles with an adapter. Fits an 11.75 rotor and 15 inch wheels. I've been sellling that kit for at least 10 years. Figured everyone knew about it by now. The kit would work better with a 1.25 thick rotor. That would be a very capable front brake system that would still fit under a 15 inch rim.

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: AndyF] #1352989 12/19/12 07:26 AM 12/19/12 07:26 AM
Joined: Jan 2008 Posts: 2,592 None 71rm23 master
71rm23 master Joined: Jan 2008 Posts: 2,592 None	Not trying to highjack the OP thread. Waiting anxiously for more info from Wayne. I have a 71 RR and been wanting to convert to discs from power drums but wanting to keep the booster (or a later booster but mainly wanting to keep it Mopar and as near as original)and replacing the M/C. Suggestions/comments/ advice?

Re: BIG DOG ROTOR 11.75 X 1.25 [Re: 71rm23] #1352990 12/19/12 10:08 AM 12/19/12 10:08 AM
Joined: Dec 2006 Posts: 3,533 Indiana F Fury Fan master
Fury Fan master F Joined: Dec 2006 Posts: 3,533 Indiana	Just remember to NOT use a drum booster with discs. It will work sufficiently for normal use, giving a false sense of security, but not give enough boost for a heavy panic stop.

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