Eliminating the Bosch anti lock brake system.
#21
Team Owner
I understand what you are saying. My concern is the lack of replacement parts to maintain a properly working system and if it isn't working properly it is a liability. It was always stated before on the forum that if the ABS unit failed you would have normal brakes but that has been dis-proven and I am also a believer that the ABS pump failure is and has been the source of the often brought up subject of a rock hard brake pedal in the c4. With the youngest ABS components on a c4 being 21 yo and the oldest being 31 yo failure or non functioning rate will only continue to increase unless a miracle happens and some replacement components are reproduced.
I suppose I would have to try hope and pray a salvage unit is workable till the motor dies and that will have the car parted and scrapped or just scrapped depending on what needs work. My guestimate is that the next one I get will be a C6 and have less, till I can't drive anymore issues of "No Longer Available" or "Obsolete"
#23
Team Owner
It's the only play I have left besides scrounging for salvaged parts and hoping it is going to give me reasonable life for the money. It gets old having to hear my parts guy say "Obsolete" or "No Longer Available" as a joke every time he sees me walk in followed by "What can I look up for you?"
#24
Le Mans Master
Member Since: Oct 2004
Location: South-central Missouri
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Anti-lock brakes, this system specifically, almost put me into the wall. All the "automotive nanny" huggers replying to this thread must either be terrible or reckless drivers because in the several decades since ABS I have NEVER had the ABS on any car activate.
Truth be told this system is an unserviceable dinosaur that has the potential to due more harm than good as the endless threads of terrible brakes on here indicates.
It costs $10 to remove and it has been the best $10 I have ever spent.
Truth be told this system is an unserviceable dinosaur that has the potential to due more harm than good as the endless threads of terrible brakes on here indicates.
It costs $10 to remove and it has been the best $10 I have ever spent.
Last edited by Paul Workman; 11-08-2017 at 12:34 PM.
#25
Team Owner
Well..."Huck", you might not have activated the ABS while "Driving Miss Daisy" for decades, but one example (yours) does not a trend make. Nor does it make you qualified as a "French model" (to categorize we more aggressive (or HPDE) drivers as "terrible or reckless either!)
#26
Pro
I realize this is becoming a thread hijack so I apologize in advance to the OP.
Having to use the ABS does not make one a reckless or terrible driver. It is a driving feature that has proven to be beneficial.
Actually, it is serviceable when you have the proper tools. If the OP had a Tech1, he would be able to activate the solenoid and purge air out of the system.
But you would rather ridicule driving ability than help.
ABS has also been proven to inspire recklessness due to the assumption "the car will save me". That sir is a fact!
What is also a fact is the unit is UNSERVICEABLE. If you think bleeding the air from a 30 year old part full of a hygroscopic fluid with more springs, o rings, solenoids, motors, cavities and moving parts than any other part in the brake system is service, then I would prefer to never drive near a car of yours.
I am also one of the only 2 people to answer the OP's question on this thread. So in the help dept. It's you who did nothing.
The truth hurts, doesn't it? A person can actually drive like a normal human being and not set off the ABS, huh!
An unserviceable 3 decade old ABS is a liability by a long shot. No one in their right mind would suggest you leave a 30 year old master cylinder in place without rebuilding it. Why then the sheep mentality that a infinitely more complex item be left as is?
It can and does fail causing severe braking issues, which is the most unsafe.
Having to use the ABS does not make one a reckless or terrible driver. It is a driving feature that has proven to be beneficial.
Actually, it is serviceable when you have the proper tools. If the OP had a Tech1, he would be able to activate the solenoid and purge air out of the system.
But you would rather ridicule driving ability than help.
What is also a fact is the unit is UNSERVICEABLE. If you think bleeding the air from a 30 year old part full of a hygroscopic fluid with more springs, o rings, solenoids, motors, cavities and moving parts than any other part in the brake system is service, then I would prefer to never drive near a car of yours.
I am also one of the only 2 people to answer the OP's question on this thread. So in the help dept. It's you who did nothing.
Well..."Huck", you might not have activated the ABS while "Driving Miss Daisy" for decades, but one example (yours) does not a trend make. Nor does it make you qualified as a "French model" (to categorize we more aggressive (or HPDE) drivers as "terrible or reckless either!)
An unserviceable 3 decade old ABS is a liability by a long shot. No one in their right mind would suggest you leave a 30 year old master cylinder in place without rebuilding it. Why then the sheep mentality that a infinitely more complex item be left as is?
It can and does fail causing severe braking issues, which is the most unsafe.
#27
Le Mans Master
Well, there's a crap-ton of misinformation happening in this thread! Let's start with the most blatent: if you don't have ABS, the best braking performance is not done by "pulsing the brakes." You need to learn how to threshold brake. The fact that ABS pulses the brakes is irrelevant - it pulses many times faster than you can, and actually approximates threshold braking.
Next, ABS is better at threshold braking than any human driver. That's been demonstrated empirically over and over. Anyone who thinks otherwise is simply wrong. Every road race series that allows ABS has every entrant running it. Every. Single. One. This included F1 back when the rules allowed it - the best drivers in the world always opted for ABS (and traction control, too!), because they knew it was better than they were and without it they were not competitive.
If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop.
Ice mode is a thing, and it's what I assume some are referring to when they talk about a "rock hard pedal." No time to get into it now, but there's a great thread on it in the Autocross forum. But it's not generally going to happen with regular street tires on the car. It's really mostly a thing when using very high-grip race tires over big bumps. It won't "almost put you into a wall."
At least on my 96, the stock ABS system is really very good. In autocross or road racing you can lean on it and the car stops extremely well. On the street, it can save your *** and your car.
Next, ABS is better at threshold braking than any human driver. That's been demonstrated empirically over and over. Anyone who thinks otherwise is simply wrong. Every road race series that allows ABS has every entrant running it. Every. Single. One. This included F1 back when the rules allowed it - the best drivers in the world always opted for ABS (and traction control, too!), because they knew it was better than they were and without it they were not competitive.
If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop.
Ice mode is a thing, and it's what I assume some are referring to when they talk about a "rock hard pedal." No time to get into it now, but there's a great thread on it in the Autocross forum. But it's not generally going to happen with regular street tires on the car. It's really mostly a thing when using very high-grip race tires over big bumps. It won't "almost put you into a wall."
At least on my 96, the stock ABS system is really very good. In autocross or road racing you can lean on it and the car stops extremely well. On the street, it can save your *** and your car.
The following users liked this post:
Paul Workman (11-09-2017)
#29
..... It takes 2 fittings for 10mm bubble flare brake lines ... 1 - double female connector to connect 2 lines together (NAPA has 'em) ... and 1 - Female 10mm Tee fitting ... About the only place you will find the Tee is at an old VW Bug wrecking yard or VW specialist ... they all (bugs) had at least one .....
I have a question Robert, connecting the three lines to the tee, from the side with three lines on the ABS unit, and union the two lines on the other side? Here is a link to the part on Amazon I found
#30
Melting Slicks
I have a 1991 C4 Corvette, I'm a Rot Rod Guy that uses simple Brake systems on my rat rods, has anybody eliminated the bosch system
on the C4's I've seen You Tube brake conversions with Nicopper brake tubing and nice balkhead fittings making a clean and simple system.
Any suggestions or am I making a mistake. Can get air out of system, tried sever times.
on the C4's I've seen You Tube brake conversions with Nicopper brake tubing and nice balkhead fittings making a clean and simple system.
Any suggestions or am I making a mistake. Can get air out of system, tried sever times.
#31
Le Mans Master
I have a question Robert, connecting the three lines to the tee, from the side with three lines on the ABS unit, and union the two lines on the other side? Here is a link to the part on Amazon I found https://www.amazon.com/PREMIUM-METRI.../dp/B01LDKTFXS
#32
Racer
Well, there's a crap-ton of misinformation happening in this thread! Let's start with the most blatent: if you don't have ABS, the best braking performance is not done by "pulsing the brakes." You need to learn how to threshold brake. The fact that ABS pulses the brakes is irrelevant - it pulses many times faster than you can, and actually approximates threshold braking.
Next, ABS is better at threshold braking than any human driver. That's been demonstrated empirically over and over. Anyone who thinks otherwise is simply wrong. Every road race series that allows ABS has every entrant running it. Every. Single. One. This included F1 back when the rules allowed it - the best drivers in the world always opted for ABS (and traction control, too!), because they knew it was better than they were and without it they were not competitive.
If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop.
Ice mode is a thing, and it's what I assume some are referring to when they talk about a "rock hard pedal." No time to get into it now, but there's a great thread on it in the Autocross forum. But it's not generally going to happen with regular street tires on the car. It's really mostly a thing when using very high-grip race tires over big bumps. It won't "almost put you into a wall."
At least on my 96, the stock ABS system is really very good. In autocross or road racing you can lean on it and the car stops extremely well. On the street, it can save your *** and your car.
Next, ABS is better at threshold braking than any human driver. That's been demonstrated empirically over and over. Anyone who thinks otherwise is simply wrong. Every road race series that allows ABS has every entrant running it. Every. Single. One. This included F1 back when the rules allowed it - the best drivers in the world always opted for ABS (and traction control, too!), because they knew it was better than they were and without it they were not competitive.
If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop.
Ice mode is a thing, and it's what I assume some are referring to when they talk about a "rock hard pedal." No time to get into it now, but there's a great thread on it in the Autocross forum. But it's not generally going to happen with regular street tires on the car. It's really mostly a thing when using very high-grip race tires over big bumps. It won't "almost put you into a wall."
At least on my 96, the stock ABS system is really very good. In autocross or road racing you can lean on it and the car stops extremely well. On the street, it can save your *** and your car.
Definitely not talking about ice mode
https://www.corvetteforum.com/forums/c4-tech-performance/1769573-hard-brake-pedal-solution-finally.html
I'm also not arguing that abs is not good, I'm also in agree with BossHog that 30 year old brake components that are partially or non functioning and cannot be serviced or replaced with new should be eliminated. I never would have replied because you started off with some really good info, but this peeked my interest "If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop." Are you a designer or engineer for the gen 1 Bosch ABS or do you service them?If any of the above I have a junk pump from 1987 (that I had to replace with a semi junk used 1988 unit because no new stuff available) that I would like you to rebuild so I have a properly functioning ABS. But seriously I'm glad your 21 yo ABS is functioning properly, unfortunately my 30 yo ABS is non functional and complete shiite.
Last edited by barbedwiredave; 11-09-2017 at 07:57 AM. Reason: space
#33
Race Director
#34
Le Mans Master
[left]
Definitely not talking about ice mode
https://www.corvetteforum.com/forums...n-finally.html
Definitely not talking about ice mode
https://www.corvetteforum.com/forums...n-finally.html
I never would have replied because you started off with some really good info, but this peeked my interest "If you've never been into the ABS, then you have no business telling everyone else about braking tech. Seriously. Just stop." Are you a designer or engineer for the gen 1 Bosch ABS or do you service them? If any of the above I have a junk pump from 1987 (that I had to replace with a semi junk used 1988 unit because no new stuff available) that I would like you to rebuild so I have a properly functioning ABS.
#35
Race Director
ABS has also been proven to inspire recklessness due to the assumption "the car will save me". That sir is a fact!
An unserviceable 3 decade old ABS is a liability by a long shot. No one in their right mind would suggest you leave a 30 year old master cylinder in place without rebuilding it. Why then the sheep mentality that a infinitely more complex item be left as is?
An unserviceable 3 decade old ABS is a liability by a long shot. No one in their right mind would suggest you leave a 30 year old master cylinder in place without rebuilding it. Why then the sheep mentality that a infinitely more complex item be left as is?
Why would I fix components that are not broken ?
#36
Le Mans Master
Oh! I forgot to comment on that. Yeah, I'd love to see the research that "proves that as fact" (btw, research never proves something as fact - he needs to brush up on scientific methodology). What's actually proven is that in a panic stop, the average driver locks up the brakes 9/10 times, and loses control of the car and increases its stopping distance. ABS has prevented an awful lot of wrecks.
#37
Team Owner
Oh! I forgot to comment on that. Yeah, I'd love to see the research that "proves that as fact" (btw, research never proves something as fact - he needs to brush up on scientific methodology). What's actually proven is that in a panic stop, the average driver locks up the brakes 9/10 times, and loses control of the car and increases its stopping distance. ABS has prevented an awful lot of wrecks.
http://www.thetruthaboutcars.com/200...er-risk-by-51/
#38
Racer
[QUOTE=MatthewMiller;1595932742]Oh, okay. I didn't know about that issue. All I can say is that yes, for a 21+-year-old car you need to be prepared to service it or have it serviced. You need to at least be able to retrieve the codes that the EBTCM is storing. That kind of goes along with owning a classic (or near classic) car. But to each his own.
Gotcha, thanks for the clarification and sorry for the misunderstanding on who you were replying to Unfortunately for the 91 and earlier cars there is no EBTCM codes stored and a rare specialty Kent-Moore tool is needed for the ABS unit.
Gotcha, thanks for the clarification and sorry for the misunderstanding on who you were replying to Unfortunately for the 91 and earlier cars there is no EBTCM codes stored and a rare specialty Kent-Moore tool is needed for the ABS unit.
#39
Team Owner
[QUOTE=barbedwiredave;1595933072]
You want a car this old and something has to give. You have to be willing to work with long wait for parts, if they are even available and scrounging around junkyards for questionable parts. If not, get something with more available parts and when the parts issue comes along and it gets irritating, rinse and repeat
Oh, okay. I didn't know about that issue. All I can say is that yes, for a 21+-year-old car you need to be prepared to service it or have it serviced. You need to at least be able to retrieve the codes that the EBTCM is storing. That kind of goes along with owning a classic (or near classic) car. But to each his own.
Gotcha, thanks for the clarification and sorry for the misunderstanding on who you were replying to Unfortunately for the 91 and earlier cars there is no EBTCM codes stored and a rare specialty Kent-Moore tool is needed for the ABS unit.
Gotcha, thanks for the clarification and sorry for the misunderstanding on who you were replying to Unfortunately for the 91 and earlier cars there is no EBTCM codes stored and a rare specialty Kent-Moore tool is needed for the ABS unit.
#40
Le Mans Master
I think he is talking about the article below. It also mentions something about improper use causing more issues. Not sure what to think at this point.
http://www.thetruthaboutcars.com/200...er-risk-by-51/
http://www.thetruthaboutcars.com/200...er-risk-by-51/