|
|
User has resigned from board
 
| back in the day ,did they ever sell a brake shoe with a groove down the center , reason being is a few years back i found a set on the rear of my 60, i replaced them with the reg smooth type, today i put them on the front of my 61, woundering if they wll relieve the bad brake fading iv been exsperiecing , it feels better ?? |
|
| |
|
Expert 5K+
Posts: 8443
  
Location: Perth Australia | It was a trick in the old days to put groves in brake shoes to stop the squealing by allowing the brake dust to get out from between the drum and the shoe more easily
Brake fade is normally from to much heat being generated (over adjustment, poor air flow, heavy brake useage)
All that being said, brake fade has always been a problem with drum brakes, which is why over the years you got drums with cooling fins and eventually disc brakes
Some of the 60s and 70s larger cars even got ventilated wheel covers to try and let more heat out
I once saw a car (used in a charity rally) that the owner made a sheet metal band with little tabs pop rivited on it to go around his drums to act as cooling fins, no idea how sucessful it was, but I though it was a cool (pardon the pun) idea 
Edited by ttotired 2014-12-16 8:58 PM
|
|
| |
|
Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | I've got a nice collection of photos of pro and amateur done ventilated brake backing plates....but not stored on this confuser.
Edited by d500neil 2014-12-17 12:59 AM
|
|
| |
|
Expert
Posts: 3575
Location: Netherlands | Drumbrakes on older bikes sometimes have grooves in the brake shoes.
I know you'll loose some contact area but I wonder why it hasn't become a default in car brakeshoes.
Just about every discbrake pad has one groove in it for similar purposes I presume.
|
|
| |
|
Expert 5K+
Posts: 8443
Location: Perth Australia | It has on disc brake pads, they all have a groove in them
Groovy 
|
|
| |
|
Expert
Posts: 1348
Location: Valley Forge, Pa. | Years ago[when the wheel was first invented], it seemed like lots of shoes had that groove. Problem was that the shoe would wear a groove in the drum too which made the cooling part irrelevant and it usually made it more difficult to remove the drum. We rarely cut the drum unless it was a real mess. The non-grooved replacement shoes would adjust to the ridge in the drum and then the those shoes would get a groove. I know, "always cut & true your drums". I was 17 working part time just to keep my car on the road for around $2 an hour and just happy to have $3 to buy 8 gallons of gas and a gallon of recycled oil. My 1st 57 Chevy used almost as much oil as gas. That was the best oil too. You would go to Pep Boys[the ones that still enjoyed cigars] get a gallon of recycled oil and pour it straight through on to the ground or out the exhaust. Today they recycle oil but regardless of good it MAY be, I remember the old stuff and will never buy the new recycled oil[knowingly anyway]. The "old stuff" was just filtered oil. It looked nice but still had much of the acids, ect. that came from being used, but who cared. That was back in the days when 1 out of every 1000 cars on the road smoked. If you were going to buy a used car and had some money, you would NEVER buy one with more than 100,000. That was the cut off. That was the the average life of a motor. Today, with the quality of the oils and the well machined motors, motors are the least of a car buyers concerns.
Sorry, I ramble again. |
|
| |
|
Expert
Posts: 3575
Location: Netherlands | I don't have any (front) drumbrake cars anymore, but I would be willing to lightly modify/drill backingplates and also take a thin wheeled grinder to the shoes and carefully place some directional grooves them to see if they stay clean of dust and improves braking.
|
|
| |
|
Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | In my collection of 'holey' backing plate photos , the cooling-holes execution on some of the examples range from slick looking sorta-scalloped
air grabbing (large-or-small) sized air-foils, to Swiss Cheese art works.
"Nobody" drives through large water puddles, anymore, but I wonder what effect 'well-ventilated' (and/or directionally-scallop-holed) backing plates would have, on brake linings'
service longevity, from dust/dirt contact via those cooling holes.
|
|
| |
|
Expert
Posts: 1497
Location: Fairfax, Minnesota | udoittwo - 2014-12-17 7:54 AM Years ago[when the wheel was first invented], it seemed like lots of shoes had that groove. Problem was that the shoe would wear a groove in the drum too which made the cooling part irrelevant and it usually made it more difficult to remove the drum. We rarely cut the drum unless it was a real mess. The non-grooved replacement shoes would adjust to the ridge in the drum and then the those shoes would get a groove. A year or two ago, I was posting about finding this groove on one of my brake shoes and resulting inverse on the drum. I am amazed that this information was never brought up then. I guess a lot of important information is sliding away over the years. |
|
| |
|
User has resigned from board
| yea I took those grove down the center brake shoes off, maybe not such a good idea, |
|
| |
|
Expert 5K+
Posts: 8443
Location: Perth Australia | I wonder if cutting grooves on an angle across the lining would achieve much?
Might help with shifting brake dust to one side or the other
|
|
| |
|
Expert
Posts: 1740
Location: Alaska | When I was 18 and working in a FULL service station, we would do brake jobs and just about anything else. There was a guy with a mobile truck that would come over and turn the drums and arc the shoes for us, we would R&R and do the WCs. We had a customer come back and complain at every stop when they released the brakes there would be a noticeable "click" or "thud". We called the mobile brake guy and he had to resurface the drums to stop this. When he originally did the drums in a rush, he cut too coarse of a cut on them and they acted like threads pulling the shoes away from the backing plates when the brakes were applied. The noise was caused by the shoes snapping back against the backing plates when the brakes were released. Long story just to point out that playing with brakes can lead to strange problems. |
|
| |
|
Expert 5K+
Posts: 8443
Location: Perth Australia | Bet that had everyone scratching their heads for a bit
|
|
| |
|
Expert
Posts: 1740
Location: Alaska | It did take a bit to figure out, don't remember if it was my boss or the mobile brake man. (not me) |
|
| |
FL brake shoes with a groove down the center
