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12-27-2023, 08:02 AM | #1 | |
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BRAKE THEORY 001 - H.A.M.Bone
They are still at it over there -
https://www.jalopyjournal.com/forum/...stion.1307162/ Quote:
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Last edited by KULTULZ; 12-27-2023 at 04:11 PM. Reason: TO ADD FUEL TO THE FIRE |
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12-27-2023, 07:04 PM | #2 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Kultulz, I am not a member over there. However, I can see his photos. My streetrod has underfloor brakes. I found out with residule valves you can not effectively bleed brakes with a vac gun. And the first step should NOT be to have the assistant start off by pumping the brakes up before cracking the bleeder valves. All that does is broadcast air bubble throughout the system. My Dad is the worst, so I bleed brakes with my wife. LOL
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12-27-2023, 09:27 PM | #3 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
The brake problems and information on all the auto sites is all over the place. Good, bad, dangerous, you name it. I just went thru that on a friends car. The right front caliper partially locked up and being pissed off, he drove it home. That was problem 1. Right front bearing disintegrated from heat. Rotor blue. All the high temp wheel bearing grease in a puddle in the hub cover. I call that pilot error.
But with everything replaced, the front wouldn’t bleed. That “combination” valve had failed in the closed position (which some say they do and some say they don’t) but all it would do is dribble fluid. The supplier still had his 10+ year old order and sold him a replacement. Different unit (we don’t use that one anymore) and we finally got it on the road. After finding an odd ball adapter to hook the rear lines up due to a fitting mis match. My cars have residual valves as required and adjustable pressure valves to the rear. Linings that match. Pressure checks at the wheel. They work well but it’s complicated, fairly expensive, and requires someone who really knows what they’re doing. No “combination” valves from some other system because it’s available cheap. What amazes me is we don’t see more braking related accidents on hot rods. Must be because we’re all older and driving careful. |
12-27-2023, 11:10 PM | #4 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Here It Is In A Nutshell -
Quote:
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12-28-2023, 07:27 AM | #5 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
See if this ill shows large enough to cipher -
Unbelievably sloppy install.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
Last edited by KULTULZ; 01-01-2024 at 09:18 PM. Reason: ADD 2nd PHOTO |
12-28-2023, 09:18 AM | #6 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
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Bill, certified Ford nut. 2016 F-150 2016 Focus 08 Shelby GT500 57 Ford Ranchero 36 Chevy, 351C/FMX, 8", Mustang II |
12-28-2023, 11:05 AM | #7 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Question. With 4 wheel disc brakes do you have this problem?
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12-28-2023, 11:39 AM | #8 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
You are the astute one ...
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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12-28-2023, 11:49 AM | #9 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
The main thing is that the early cars had the MC mounted on the frame rail under the driver's floorboard (before swing pedals). That would put the MC reservoir below the wheel cylinder/caliper and gravity would cause the brake fluid to drain back (gravity) to the MC, resulting in a soft pedal on first application.. A 2# RESIDUAL VALVE needs to be plumbed in to hopefully prevent that on DISC APPL. The 10# RESIDUAL VALVES needed with drum brakes (at that period) would cover DRUM but DISC would always have a slight drag on the rotors with the 2# RV. If you mounted four wheel disc, the problem would be worse.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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12-28-2023, 01:20 PM | #10 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
photo look clear to me
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12-29-2023, 09:53 AM | #11 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
A Good friend whom I was assisting with his build mounted the master on the frame rail. Disc/disc setup. His reservoirs were on the fire wall. Convincing him that residuals were not required because the reservoirs were above the wheel cylinders ended up with "pull the brake lines off the master and watch the fluid run all over the place". After the mess was cleaned up he conceded. Mean ol Mr. Gravity keeps thing tight when the reservoir is above the wheels!
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12-29-2023, 12:25 PM | #12 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
I have no experience with this type of braking, so bare with me please. So the theory is to use a frame rail mounted MC without reservoir(s) and the weight of the fluid in the remote reservoir(s) and lines will prevent the brake fluid from draining back (gravity) from the caliper (without a RV) as the MC itself will be/remain full? Eliminating the RV would rid the problem of a slight drag on the rotor.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
Last edited by KULTULZ; 12-29-2023 at 12:41 PM. |
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12-30-2023, 09:53 AM | #13 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Just like the ENERGIZER BUNNY, it keeps going and going ...
To Wit - https://www.jalopyjournal.com/forum/...rakes.1307775/ Quote:
I think he is making a tanker and runnin' shine with those copper worms ...
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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12-30-2023, 10:21 AM | #14 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
... ... - I'LL BE DAMNED ... IT'S TRUE! - CPP Master Cylinder, MCPV-1, Polished Aluminum, 1" Bore - Quote:
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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01-04-2024, 11:32 AM | #15 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
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Bill, certified Ford nut. 2016 F-150 2016 Focus 08 Shelby GT500 57 Ford Ranchero 36 Chevy, 351C/FMX, 8", Mustang II |
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01-04-2024, 02:01 PM | #16 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
I was describing a MC without the reservoir integral or the reservoir atop the MC (closed except for fill and outlet fittings).
If remote as you describe (firewall mounted), the weight of the fluid (in the reservoir(s) and lines) would preclude the front caliper line draining back after pressure release to the MC due to gravity? He had no soft pedal/slow take-up after that (removal of the external #2 RPV)? Does he have the GM METRIC CALIPERS? Like I said, I never fooled with anything this early so I am on a learning curve.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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01-05-2024, 08:52 AM | #17 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Yes, that is correct. He used a "regular" Corvette master with a modified top, aluminum with fittings for the lines to the remotes. Look inside a regular master and watch the cylinder when pushing the pedal. Again a 4 disc setup.
He had perfect pedal feel and response. Firebird rear disc, after market kit for the front, 11" rotors. I drove the car for a young lady's wedding and put about 150 miles on it. Never felt funny or out of sorts. He has unfortunately passed and I sold the car for the widow to a fellow in WA. The pictures I had are unfortunately on the failed hard drive from my now dead old machine....
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01-11-2024, 11:32 AM | #18 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
EDIT - 17FEB2024 [Let me qualify the above statement. There are DISC/DISC PPV's. Usually, when OEM designs a four wheel disc car, the front and rear systems are balanced by design (same as a four wheel drum car) or operated with ABS. If the builder uses differing rated vehicle braking ends, there may/will be a need for a PPV. Same situation on a rear disc swap. The vehicle ends will not be matched (same as a DISC/DRUM swap).] If one retrofits a car with front and rear disc that the wheel ends are from differing vehicle(s), chances are yes. Even some OEM installs will use a DISC/DISC COMBINATION VALVE (PDV and PPV - NO METERING and/or RESIDUAL PRESSURE VALVE) to allow for any inherent imbalance. Say you have a car and use GRANADA DISC front and later style CROWN VIC disc on the rear. There is no way that they can work together correctly. One will overpower the other at some point, especially on a panic brake application. Then you go to PPV(s). And we haven't gotten to the correct style MC for DISC/DISC and the amount of fluid volume needed to move the chosen caliper pistons correctly. A lot to cipher on and most of these so-called kit makers haven't the faintest clue or concern. WILWOOD offers correct balanced DISC/DISC (as I am sure of others) kits but I have never checked the offered kits and what they fit.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
Last edited by KULTULZ; 02-17-2024 at 09:00 PM. |
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01-20-2024, 10:30 PM | #19 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
- ANOTHER CONTINUING SAGA ENTRY IN THE USUAL FASHION - TO WIT - https://www.jalopyjournal.com/forum/...ravel.1309066/ |
01-25-2024, 05:32 AM | #20 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
When bleeding a DUAL RESERVOIR MC SYSTEM (w/ PDV included), you always use a shutter valve centering tool in the PDV (replaces switch) for the bleeding process. If that shuttle pins moves to one side or another during bleeding, it is going to interfere with fluid pressure/volume in either of the circuits -
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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01-25-2024, 09:22 PM | #21 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Correct Kultulz. But the valve had no way to reset, short of possibly dis assembly from the back. We had the centering tool, but there was no indication we could use it. It was interesting that the replacement valve he bought had a rubber cover on the front to allow reset. It’s not my first rodeo with those things, which is why I don’t like them except in oem applications.
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01-26-2024, 03:29 AM | #22 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
Quote:
If there is what appears to be a rubber plug on the front of a COMBINATION VALVE, that is the METERING VALVE section of the COMBINATION VALVE. All of this varies by application and design (and there are many). Unless the system is OEM, there is no need for a COMBINATION VALVE with PDV included (IMO). All you need for valving in a DISC/DRUM swap is a METERING VALVE (and this will vary) and (as bad as I hate to say it) a so-called ADJ PPV (as there is really no other choice) ... EDIT - 17FEB2024 - Well there is but it is scare and very expensive ... One must understand the theory and use of an ADJ PPV as they can flat bust your a$$. FORD and GM have many design differences. You have to know what period/style system you are working with. I will now pass the collection plate. Please turn to page 23 in your hymn book and sing along.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
Last edited by KULTULZ; 02-17-2024 at 08:50 PM. Reason: ADD INFO |
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01-26-2024, 05:39 PM | #23 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
I think what makes this all hard to understand is the terminology used by different manufacturers and/or vendors as to what is what and to what time periods valving was used regarding differing system(s) (that and one hell of a lot of disinformation).
FORD says tomato and GM says tomatoe. Kit vendors are pushing off-shore crap that has no business being installed on an on-road car.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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01-27-2024, 12:35 AM | #24 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
See if any of this helps -
https://www.ecihotrodbrakes.com/brake-facts When you decide on a kit with GM parts, you are using a completely differently designed system, especially if D154 LOW DRAG CALIPERS are included.
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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01-27-2024, 07:20 PM | #25 | |
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Re: BRAKE THEORY 001 - H.A.M.Bone
While CAROUSING WITH MY BROWSER giggling for a SPECIAL SERVICE TOOL I never bought (like a MOE-RON) when they were readily available ...
I came across this GOLDEN OLDIE - Quote:
Can you believe the ignorance then and how it keeps on going after all of these years? - Metering Valve Diagnosis - https://www.brakebleeder.com/metering-valve-diagnosis/
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
Last edited by KULTULZ; 01-27-2024 at 07:36 PM. |
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01-28-2024, 03:37 PM | #26 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
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***** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO - (OCD In Correct Alphabetical Order)
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02-17-2024, 08:11 PM | #27 |
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Re: BRAKE THEORY 001 - H.A.M.Bone
- GM COMBINATION VALVE THEORY UPDATE - ADDED INFO UPDATE - ...dit...dit...dit... To All Listeners And Ships At Sea ... dit...dit... It is now reported that when the PPV section of a GM STYLE COMBINATION VALVE fails, the correct procedure to correct is not a service part replacement but the removal of the PPV-PDV and the FRONT METERING VALVES. This results in a distribution block that allows 50/50 braking on both front and rear circuits ... ... ... TO WIT - https://duckduckgo.com/?q=50%2F50+gm...%3DwJb0ASrp9_8 Should I submit this fact breaking news @ H.A.M.Bone? Last edited by KULTULZ; 02-17-2024 at 09:03 PM. Reason: ADD INFO |
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