PINTO CAR CLUB of AMERICA
Welcome to FordPinto.com, The home of the PCCA => General Help- Ask the Experts... => Topic started by: Pintocrazed on August 09, 2014, 02:12:37 PM
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Anybody know if I can use 74 up rotors on my 73?the 73 rotors are crazy expensive
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Plain and simple, NO.
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:( I didn't want to spend 300 for rotors
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See bbobcat75's link for the differences in the rotors. Rockauto is a little cheaper at $222 plus shipping for two ACDELCO 73 rotors. Maybe put an ad in the wanted section. Good luck.
http://www.fordpinto.com/pinto-faq/71-spindle-to-74-spindle/msg130024/#msg130024
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What does the "hub reg" dimension refer to?
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Do you live near a self service yard? The local Pick Your Part has rotors listed at $14.99 with a $3 core charge. Probably $20 each out the door. On the 50% off sale day about $13 each. I know there aren't Pinto's every trip, but man, maybe I should be grabbing them when I can. If they Mic OK and aren't deeply grooved they are probably good. For the record I did get a spare set a number of years ago because people were complaining they were $100 each. Now $150!
Which brings up the subject..., can your rotors be turned? I think Pep Boys charged about $13 a rotor when I had my wife's Civic rotors turned. I opted to have them turned figuring the warping had run its cycle. I felt new rotors would just warp again. So far 9 months later everything is good.
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I was thinking that it might be fairly trivial to machine the 74+ rotors, but I have access to a machine shop. 8) Not everyone does.
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I believe the "hub reg" refers to OD of the rotor hub where the factory steel wheels center themselves on the rotor. I do know that the early factory steel wheels will not fit over the larger later year rotor hubs.
As far as machining a later year rotor down, I would have a concern with the later rotor "min thick" being larger that the early rotor "nom thick".
Since you are considering non-stock set up, this link shows how to install larger 5 lug rotors on the early spindle plus some other custom ideas. Note, larger rotors usually require larger wheels.
http://www.fordpinto.com/pinto-faq/front-disc-brakes-(4-5-lug)/msg6498/#msg6498
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This is as cheap as you can find
http://www.amazon.com/ACDelco-18A1400-Professional-Durastop-Front/dp/B000C9HAJ8/ref=au_as_r?ie=UTF8&Make=Ford%7C54&Model=Pinto%7C693&Year=1972%7C1972&carId=001&n=15684181&s=automotive&vehicleType=5 (http://www.amazon.com/ACDelco-18A1400-Professional-Durastop-Front/dp/B000C9HAJ8/ref=au_as_r?ie=UTF8&Make=Ford%7C54&Model=Pinto%7C693&Year=1972%7C1972&carId=001&n=15684181&s=automotive&vehicleType=5)
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I believe the "hub reg" refers to OD of the rotor hub where the factory steel wheels center themselves on the rotor. I do know that the early factory steel wheels will not fit over the larger later year rotor hubs.
If that's the case, then turning the hub diameter down to the early size wouldn't be hard. Pretty common with Granada brake swaps going onto early Mustangs.
As far as machining a later year rotor down, I would have a concern with the later rotor "min thick" being larger that the early rotor "nom thick".
That's a definite consideration if the vent passages are wider in the later rotor....and they probably are to save weight and material.
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I didn't take a micrometer to them but I've had early & late rotors side by side & the vents appear similar in size. Cutting late rotors down to work on an early car should leave plenty of material.