SMOOTHCHROME Posted March 19, 2022 Posted March 19, 2022 Does anybody on the forum know if the front rotors on a 70 Monte big block car have the same or bigger rotors than the small block Mont Carlo Quote
Canuck Posted March 19, 2022 Posted March 19, 2022 5 minutes ago, SMOOTHCHROME said: Does anybody on the forum know if the front rotors on a 70 Monte big block car have the same or bigger rotors than the small block Mont Carlo Same rotors for all first gen Montes regardless of engine. 1 Quote
SMOOTHCHROME Posted March 19, 2022 Author Posted March 19, 2022 MC1of80 and jft69z Thank you for the replies. 2 Quote
Rob Peters Posted March 19, 2022 Posted March 19, 2022 It is amazing but my Monte still has its original factory front rotors. I am not sure about the 71 and 72 rotors but the 70 rotors had a recessed grove all the way around the rotor about half way across the face of the rotor. This is how you can tell they are factory style rotors. It would surprise me if what you buy as replacement rotors now would have his grove in them. rob Quote
jft69z Posted March 19, 2022 Posted March 19, 2022 26 minutes ago, Rob Peters said: This is how you can tell they are factory style rotors. It would surprise me if what you buy as replacement rotors now would have his grove in them. rob The current rotors out there don't seem to have that groove. They're the same rotors for a 69 Camaro though & the ones I took off my car recently had the groove in them. I did replace them when I initially built the car in the late 80's, I think they were Bendix at the time. Quote
cny first gen 71 Posted March 19, 2022 Posted March 19, 2022 As best as I can remember from back in the day all the factory rotors had that groove, tha A body's anyhow and I think the full sized cars too. 1 Quote
Dtret Posted March 20, 2022 Posted March 20, 2022 My 71 still has the original also. When I had them turned I told them to leave the groove. They said the groove was not supposed to be there something caused it. I said your right and the cause was gm. lol. Idiots. 3 Quote
cny first gen 71 Posted March 20, 2022 Posted March 20, 2022 If you know anyone that works in a brake shop or has a brake lathe they could cut them in there if you really want. Quote
Rob Peters Posted March 20, 2022 Posted March 20, 2022 2 hours ago, Dtret said: My 71 still has the original also. When I had them turned I told them to leave the groove. They said the groove was not supposed to be there something caused it. I said your right and the cause was gm. lol. Idiots. 1 2 Quote
Glen Posted March 20, 2022 Posted March 20, 2022 Aawwweeee, S%#T…. Rob let the dancin’ bananas out of their cage. 1 Quote
Michael Boyte Posted March 20, 2022 Posted March 20, 2022 DANG !!!! NOW ROB HAS SOME REAL BANANAS !!! Quote
Dtret Posted March 20, 2022 Posted March 20, 2022 I don’t know what I did to deserve this kind of abuse. Never mind, yes I do. Carry on. 1 3 Quote
Leghome Posted March 20, 2022 Posted March 20, 2022 3 hours ago, Dtret said: I don’t know what I did to deserve this kind of abuse. Never mind, yes I do. Carry on. 😁😁😁🤑😁😁It is your magnetic personality Dennis 🤑 1 Quote
Dtret Posted March 20, 2022 Posted March 20, 2022 3 minutes ago, Leghome said: 😁😁😁🤑😁😁It is your magnetic personality Dennis 🤑 Ugh Quote
Scott S. Posted March 20, 2022 Posted March 20, 2022 Has anyone ever had the rotors with the finned hubs ? Both my front rotors and read drums have them, and I was just wondering if this is just manufacturer specific, or original parts. Quote
cny first gen 71 Posted March 20, 2022 Posted March 20, 2022 Yes on the finned drums but not sure what you mean by finned rotors. Can you show us what your talking about? They all have he Finns in the center. Quote
Blake350 Posted March 20, 2022 Posted March 20, 2022 Wonder what that groove was for? Doesn't look to be for cooling...maybe some sort of air gap between pad and rotor? or an indexing aide during machining? or only purpose is for mechanical minds to wonder about it 50 years later? yes that's what I'm going with (for now) Quote
Dtret Posted March 20, 2022 Posted March 20, 2022 Quite possible it was a factory machine to line. If you got there throw them away and buy new. Quote
Rob Peters Posted March 21, 2022 Posted March 21, 2022 I am wondering if it was used by dealers to guage how much wear is on a rotor. It may have been a pass/no pass indicator for knowing when they were worn out. rob Quote
Blake350 Posted March 21, 2022 Posted March 21, 2022 11 hours ago, Rob Peters said: I am wondering if it was used by dealers to guage how much wear is on a rotor. It may have been a pass/no pass indicator for knowing when they were worn out. rob thats possible.. a quick visual "min thickness" reference... we used to use a primitive guage setup to judge whether we could cut them back in the day Quote
Scott S. Posted March 21, 2022 Posted March 21, 2022 22 hours ago, cny first gen 71 said: Yes on the finned drums but not sure what you mean by finned rotors. Can you show us what your talking about? They all have he Finns in the center. The front rotors had short fins that were around the center hub down to the disc surface..... I threw them in the metal scrap when I re did my brakes, thought that they were just that old. Quote
cny first gen 71 Posted March 21, 2022 Posted March 21, 2022 2 hours ago, Scott S. said: The front rotors had short fins that were around the center hub down to the disc surface..... I threw them in the metal scrap when I re did my brakes, thought that they were just that old. Can't say I've ever seen that before that I can think of. I upgraded to drilled and slotted rotors on mine but no Finns. Quote
Leghome Posted March 21, 2022 Posted March 21, 2022 The fins vthey are talking about me thnks is in the space between the inner and outer face of the rotors at least that is my thooughts were have been wrong alreaddy 6 times today 😁😀 Quote
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