Brake Rotor - '70 Challenger • The Dodge Challenger Message Board

by **CraigRTSE** » 26 Aug 2007 14:18

Summit doesn't list a factory disc brake rotor for a '70, but it does list this one, which appears to be the same (11" & 4.5 lug pattern). Yet when I click to see if it fits my application, it says only for '73-'74 Challenger. Is there a difference in rotors from '70 vs the other years (other than the separate vs combined hub design)? Is this the right rotor for my '70?

http://store.summitracing.com/partdetai ... toview=sku

by **dave-r** » 26 Aug 2007 14:23

The two-piece rotor has a smaller inner bearing. So the later one-piece does not fit.

by **CraigRTSE** » 26 Aug 2007 15:03

Thanks!

by **dave-r** » 27 Aug 2007 9:27

Lots of disc brake information here.

http://www.moparaction.com/tech/archive/disc-main.html

by **fbernard** » 27 Aug 2007 9:39

Year One does list a one-piece rotor that fits the 1970-1972 E-bodies, but it's pricey! : Part number is NG122. 250 bucks apiece!
http://www.yearone.com/serverfiles/part ... 47646&trk=

It would be about the same price to buy repop spindles and use the rotors you found at Summit (If I remember correctly, Pirate Jack or Magnum Force may have the spindles cheaper than the $400 Master Power Brakes sells them for). Then you'd be able to use off the shelf rotors.
But rotors don't wear out that fast, normally.

by **Eddie** » 27 Aug 2007 13:25

fbernard wrote:Year One does list a one-piece rotor that fits the 1970-1972 E-bodies, but it's pricey! : Part number is NG122. 250 bucks apiece!
http://www.yearone.com/serverfiles/part ... 47646&trk=

It would be about the same price to buy repop spindles and use the rotors you found at Summit (If I remember correctly, Pirate Jack or Magnum Force may have the spindles cheaper than the $400 Master Power Brakes sells them for). Then you'd be able to use off the shelf rotors.
But rotors don't wear out that fast, normally.

Fabian, would the one piece rotor simply bolt on with no mods to a 70 disc brake spindle that currently uses the factory two piece rotor?

by **dave-r** » 27 Aug 2007 15:21

Eddie. Read my replies above. The one piece rotor is 73-74 only. They re-designed the spindle and rotor and it uses a bigger diameter inner bearing.

by **Eddie** » 27 Aug 2007 18:41

I understand Dave. It's just the part description Fabian was referring to, 1970-72.

by **dave-r** » 27 Aug 2007 18:51

Me being thick Eddie. That one must just bolt on. :nod:

by **Eddie** » 27 Aug 2007 19:28

Speaking of "thick"..no,... I better keep my mouth shut.... :evil:

by **jh27n0b** » 27 Aug 2007 20:20

A little over a year ago I purchased my 1970 rotors from NAPA for around $150 each. The only thing is that the studs are right hand thread. So if original is your quest then you would have to change the studs on the drivers side to left hand threads. Advance Auto also sells rotors for the 1970. They were a little pricer than NAPA.
Bob

by **jh27n0b** » 27 Aug 2007 20:31

There is also some for sale on E-Bay. They are priced for $55 a piece. Maybe worth checking into.
Bob

by **Eddie** » 27 Aug 2007 20:51

So Bob, these rotors from NAPA, that bolt on to the 70 spindles, which originally used the Kelsey Hayes single piston caliper witha two-piece rotor, O.E.M. everything, will simply bolt on? And of course it a superior,(more rigid), one piece design? Cool, great to know that!!Thanks! BTW, Bob, are you still planning on coming over Mon? we will have to record it on the digi cam for the members here! :s004:

by **jh27n0b** » 27 Aug 2007 21:53

Yes Eddie, they were as simple as putting the bearings in and sliding them on. The only thing was the lack of left hand thread.

I am still coming out your way this Saturday. I will call you when The first match is about over. We play at North at 10:00am and then again at South at 2:00 pm. This should give us a couple of hours.

Bob

by **Eddie** » 27 Aug 2007 23:18

Sounds good Bob! :thumbsup: