Modifying the ABS module to simulate fords "line lock" feature
Ok, so let me be the first to say that I think burnouts are pretty stupid and that for most street tires they actually make you slower on drag racing which is something our cars already mostly suck at.
Taking all that as given, I had a buddy describing this line lock feature that ford has added to the mustang which basically allows you to hold the front brake while the rear brake is free so you an do monstrous burnouts without nuking your rear brakes. Now it seems to me that if you have a car with abs, you could just induce a signal to the abs hydraulic module with a switch to actuate the solenoid to cut off brake pressure to the rear caliper. I guess you'd need a diode to keep from sending the signal back into the ecu, but it seems it would be pretty straightforward to do. I'm not interested in starting a discussion about how burnouts are stupid/unnecessary or not, I'm just looking for anyone who is technically literate enough that they could comment on it being as simple as what I mentioned here or not. RIWWP I'm talking to you ;-) |
:lol:
This is in General Automotive, so I don't know if you are referring to the RX-8 specifically or not. In general though, it's going to be more complicated than that. I don't know for sure on any of this, but some thing to consider and questions to answer if you start digging into it:
Regarding the last point, an ABS failure in an RX-8 can be quite scary indeed, as 1 wheel can get all the braking force, nothing for the other 3. Example: Writeup in a thread: https://www.rx8club.com/series-i-whe...-fails-190041/ From the RX-8: From the spun out car: Given the acknowledged low value of the goal, I personally wouldn't be even attempting a mod like this, given the very high cost of a failure. |
Yeah I hadn't even thought about tripping an error code or bricking the whole abs module, it'd be something to try on a beater car that I don't care about just to satisfy my curiosity, but yeah I guess nothing is ever simple :-)
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Cars have advanced beyond points where simple electronics changes will actually work as intended. All the safe guards, fail safes, complicated coding and logic, etc... The only really effective solutions for anything like this involve building your own module with inserted coding logic.
Like if I WAS going to try this directly with the ABS system, I'd probably try hacking the ABS module directly, inserting the additional subroutines needed, adding the switch conditions needed to the logic, etc... Anything external is bound to cause problems, though obviously this is a significant undertaking, akin to building an ECU from the ground up. A physical / mechanical solution, like brake bias valving, would be simplier to achieve. Something that just ignores the ABS system completely. |
Originally Posted by RIWWP
(Post 4592976)
Cars have advanced beyond points where simple electronics changes will actually work as intended. All the safe guards, fail safes, complicated coding and logic, etc... The only really effective solutions for anything like this involve building your own module with inserted coding logic.
Like if I WAS going to try this directly with the ABS system, I'd probably try hacking the ABS module directly, inserting the additional subroutines needed, adding the switch conditions needed to the logic, etc... Anything external is bound to cause problems, though obviously this is a significant undertaking, akin to building an ECU from the ground up. A physical / mechanical solution, like brake bias valving, would be simplier to achieve. Something that just ignores the ABS system completely. |
Entirely agree, I mentioned earlier that I wouldn't pursue any of it. That was simply noting the path I would take if I was trying to mod what I had (which I won't).
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