Looks like NAPA no longer carries the rotors for a 72 upgrade

Discussion in 'General Automotive Questions' started by Bronxguinea, Jul 15, 2018.

  1. Bronxguinea

    Bronxguinea In Second Gear

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    Well I guess I have to go with the 5X5 wheels if I want to go with the rotor upgrade. NAPA no longer carries the 72 Thunderbird rotors . Lucky I just picked up a 77 T-bird with HD front sway bar and rear sway bar, now I can pull the axles and spindles too
     

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  2. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    Why settle for 11 when you can have 12? Because 12 causes the factory wheels to rub on the calipers, which means I can't have my concours-restored car. Dumbasses.
     
  3. ribald1

    ribald1 Banned PLATINUM MEMBER

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    The hydroboost on my 72 will lock the 11's at any speed.
     
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  4. Bronxguinea

    Bronxguinea In Second Gear

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    Not if you get 15" magnum 500 or run other 15"Inch bigger rim and lower profile tire comes out to be the same diameter , And it has nothing to do with stopping power same calipers and same pad coverage it's more metal less heat build up, But I was thinking of going with a 78 Mark V hydro boost unit for the stopping power too ,plus the bigger rotors , It's a Q code car so figure why not go all out on it
     

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    Last edited: Jul 16, 2018
  5. TestDummy

    TestDummy In Maximum Overdrive SILVER MEMBER

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    Which would come in handy when road racing your Ranchero at Watkins Glen.
     
  6. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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  7. TestDummy

    TestDummy In Maximum Overdrive SILVER MEMBER

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  8. aquartlow

    aquartlow In Maximum Overdrive

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    The larger diameter rotors actually give you a bit more braking "leverage" for slowing the rotor down, the further away from the center of the hub the friction pads are, the more effective they will be at slowing the rotor down with the exact same hydraulic input pressure. Now, the upgrade will only move the pads outward about 1/2", but every incremental increase away from the center of the hub will gain braking effect. To test this theory somewhat, try this: Start your vehicle and turn the steering wheel where the usual grip area is, now try to turn the steering wheel while grasping it nearer the center hub, way easier to turn by the grip area and both scenarios have the same hydraulic input pressure/assist.
     
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  9. TestDummy

    TestDummy In Maximum Overdrive SILVER MEMBER

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    Also adds more unsprung weight. So there's that.
     
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  10. Bronxguinea

    Bronxguinea In Second Gear

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    74 they upgraded to a larger inner wheel bearings on the smaller and larger rotors so I have everything to do it . might as well . 30 years of rebuilding trannys update bulletins were always for a reason due to past issues . The post was really only to let anyone looking to do the upgrade that NAPA the only parts place left that was carrying them has discontinued them. Personally I like the look of 15" on it better than 14"
     
  11. ribald1

    ribald1 Banned PLATINUM MEMBER

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    Centrix must have stopped making a lot of things and seem to be just running down inventory as the catalog just keeps getting smaller and smaller.
     
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  12. aquartlow

    aquartlow In Maximum Overdrive

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    This ^ was one of the reasons I modified my front brake hubs to accept the larger 12.44" "slip-on" Crown Vic rotors and dropped the rear drums for the same year CV rear disc assemblies, it was getting too hard to find "good" brake parts for our rides, especially rear drums. It took a bit of work, but with the addition of HB and 4 wheel discs with the larger rotors, my Ranchero will out brake all my family's other ABS equipped vehicles.
     
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