Re: disc brake spindle question - b body
[Re: John_Kunkel]
#183090
01/05/09 05:31 PM
01/05/09 05:31 PM
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Joined: Feb 2004
Posts: 936
OLD318
super stock
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super stock
Joined: Feb 2004
Posts: 936
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BEEN THERE...DONE THAT... Instead of worrying about whether or not you have the right donor car etc... I would recommend that you at least consider the kit from Master Power brakes. It's not just the spindles, shields, your going to have to grab from the donor car...to make the system work... I've already been through this on my 70 Coronet. my recommendation based on my experience doing this (I did the 73-76 A-Body swap) ... Just buy the complete kit INCLUDING the booster and master cylinder AND plumbing from Master Power brakes... It's based off of the 73-76 A-body conversion anyway! The difference is: You can get it all from one place along with tech support which is very good BTW... or You can go piece by piece and fiddle and fool with old donor cars and parts stores... In the end, you can't do it any cheaper, any easier or get any better results than if you just buy the kit. If I had to do another one, I would buy the kit in a heartbeat... Again, been there, done that! Just my 2 cents... FWIW... Best of luck to you either way!
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Re: disc brake spindle question - b body
[Re: John_Kunkel]
#183091
01/05/09 05:41 PM
01/05/09 05:41 PM
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Joined: Oct 2003
Posts: 3,386 KY USA
mopargem
master
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master
Joined: Oct 2003
Posts: 3,386
KY USA
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Sorry Jim if I sounded defensive, my wife passed away November 3rd and I have been a little on edge ever since. My 74 Charger has become a parts car and I would love to swap all the disc brake stuff over to my 70 Challenger. Would like to here more from folks who have made the swap with the tall spindles. Also John Kunkel I always highly respect your knowledge, thanks for your input. Tim
68 Polara 500...LL1 Y7 M6X 69 Hemi road runner...X9 X9 M6X 69 A12 road runner....R4 R4 M6X 69 ModTop FLORAL Super Bee...F6 M6W 70 AAR 'cuda...EW1 EW1 H4X9 71 Duster 340...FJ6 V24 L6X9 71 road runner FC7 V1X M6X9 72 Rallye Charger B5 V1W 74 'cuda 360...KB5 V1X A6X9 08 SRT Challenger #234
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Re: disc brake spindle question - b body
[Re: John_Kunkel]
#183093
01/06/09 03:27 AM
01/06/09 03:27 AM
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Joined: Apr 2008
Posts: 1,285 Pacific NW USA
CompSyn
pro stock
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pro stock
Joined: Apr 2008
Posts: 1,285
Pacific NW USA
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Quote:
Quote:
So who do we believe on the 73 up B body spindles, I have heard they can be dangerous with an earlier car swap.
Every time you hear that sentiment, ask if anybody has a verifiable case of the tall spindle causing a failure or incident.
Quote:
Rick Ehrenberg -
If you are referring to the same one I saw, the chart showed almost triple the bump steer, which coincided pretty well with the tests I made years back.
I was, and still am, dead set against this swap. I hate bump-steer...I like to drive fast on lousy roads!
There are lots of cars that perform pretty well with less-than-perfect suspension / steering geometry. In fact, virtually every design is a compromise. I just fail to see the rationale behind a deliberate downgrade, esp. when the correct parts are not hard to procure.
One of the first years I ran the One Lap of America in my Valiant, two guys - great guys - from western Canada showed up in a pink Charger. They had the tall knuckles, calipers swapped, and I noticed the brake hoses were way too short and/or misrouted. I helped them fix that before the event began.
They claimed that the car had "perfect alignment". And it seemed fine on the highway sections. But on the track, they spun the car, went off, etc., repeatedly. I've always wondered how much of their grief was due to large amounts of bumpsteer.
While I have no idea whom the guy is who did the measurements, presumably, since he was (I'm told) trying to build a case for the tall knuckles, it stands to reason that if it was fudged, it would been fudged in the other direction!
Picture an imaginary knuckle where the upper section had been made, say, 10 inches taller (also see diagram way up in this thread). Nothing else changes. Now the UCA is at a bizarre angle (no longer approx. perpendicular to the steering axis (ball joint axis), and the top of the knuckle moves in and out along what's now a crazy arc that moves the upper ball joint way in and out from jounce to rebound. Camber changes, bigtime, right? And what happens to toe during the travel? Ta-dah!
In another everyday example: Go get your front end aligned. What's the last adjustment they make? Right! Toe! That's because ANYTHING that changes camber will change toe.
Chrysler's engineering credo for these cars (published) was: "...at some acceptable caster / camber setting, the amount of toe change can be set or corrected to zero which will yield an ideal toe patten.”
Why screw with that? While there are zillions of instances where aftermarket parts far surpass OEM stuff (and the reverse is equally true!), there are no re-engineered aftermarket knuckles – only ones where the spindle has been moved. Jeez. These cars had MUCH better - DEMONSTRABLY better - geometry (not to mention torsional rigidity, unsprung weight, strength, etc.) than their contemporary competitors. Why screw that up?
I’ll give somebody (or everybody) else the last word. I’m done!
Cited HERE
CompSyn
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Re: disc brake spindle question - b body
[Re: mopargem]
#183095
01/06/09 03:44 PM
01/06/09 03:44 PM
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Joined: Sep 2003
Posts: 1,168 Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Quote:
...my wife passed away November 3rd and I have been a little on edge ever since. My 74 Charger has become a parts car and I would love to swap all the disc brake stuff over to my 70 Challenger. Would like to here more from folks who have made the swap with the tall spindles.
Sorry to hear about your wife.
I put '74 Charger discs on my '72 RR back in '76, and they were on there for over 25 years and 50,000 miles with no problems. No ball joint issues, no steering issues. I'm doing something different now, but I wouldn't worry about the swap you're contemplating.
-Marq
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Re: disc brake spindle question - b body
[Re: 340duster340]
#183098
01/06/09 09:41 PM
01/06/09 09:41 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I remember when Eberg wrote/published his article against using them & it was an excellent piece of journalism that actually scared me to death of ever using them . Then there started to be feedback from people who were using them & some were against them but many were using them & were touting their advantages.
live every 24 hour block of time like it's your last day on earth
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