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Old 09-26-2002, 11:07 PM
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Post Converting to Anti-Lock brakes

Well I dont exactley have a hot rod I have a 1968 Datsun 510 as my current project and since the car will wiegh in at around 2000lbs when finished with the mazda 13b rotary engine in it and have a near perfect 50/50 wieght distribution it will mainly be a road course car, the brakes are the problem though with the big brakes I have on the car and how light the car is I really want to put 4 wheel abs, I think I can do it with just about any system, I will probably use a mitsubishi 3000gt setup because they are available to me for a relativly low price. The problem I am having is adding the wheel speed sensors to the hubs? Any suggestions on how to do this? thanks in advance I am hoping to find some help because everyone I ask either tells me it is impossible or just looks at me like I am insane.

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Old 09-26-2002, 11:22 PM
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Brainfood, I have raced road course legally and illegally in the SCCA as well as for fun and I have used disc brakes on all my cars, is this a race vehicle or daily driver? I can't help much with the swap from Mitsu. to datsun, but I would like to hear your reasoning for using ABS if it is a race vehicle You'll get some good help here.

HK
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Old 09-27-2002, 12:22 AM
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[quote]...everyone I ask either tells me it is impossible or just looks at me like I am insane.<hr></blockquote>

Well, not insane...but is it really necessary? I assume by wheel speed sensors you are actually referring to the exciter ring installation on your present hubs? I would look at later NISSAN truck/Pathfinder (2WD) for installation tips. It might be that some of the hubs are interchangeable with the early model (or use complete changeover) and that would take care of the rings and sensor mounting.

It seems to me the biggest difficulty woul be the control module as most are fixed programed to a certain weight bias vehicle. You would have to over-ride the PROM to get the desired results.

A four wheel disc setup with an adjustible proportioning valve will not work?

Keep us posted as this is an interesting upgrade. Might as well go for Traction-Control while you are there...

[ September 27, 2002: Message edited by: KULTULZ ]</p>
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Old 09-27-2002, 12:33 AM
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I know JC whitney used to carry ABS kits for cars without abs. I would check and see if they still do. Might be worth look.
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Old 09-27-2002, 11:37 AM
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It is strictly a street car, it will probably see weekend auto-x's and maybe one track day a year but it wont be scca sanctioned so the scca rules wont matter, mostly I was thinking about it because a similarly equiped 510 in the SCC Ultimate street car challenge lost to all the other cars in braking distance because of lack of abs, it was lighter and had bigger brakes but it still lost horibly, 180ft or so which I would like the braking distance to be down around 130-140 if that high. Thanks for the help I am looking at 300zx hubs I am not sure if the will swap in or not but they might, I will search JC whitney I searched the net but couldnt find any universal kits, that would be the best way to go. Thanks for all the help.
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Old 09-27-2002, 10:39 PM
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Well someone else mentioned a custom kit any ideas on where else to get one?
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Old 09-17-2004, 10:02 AM
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working on my own TCS

Hey, i'm building a TCS and rudimentary ABS system for Old Dominion University's formula team www.odumotorsports.com

It's a simple system, measures wheel speed and kills spark and fuel while the wheels slip, and brings the motor back as soon as the wheels grip. Essentially it behaves like a traction-dependent rev limiter. Additionally there is an ABS component that uses the same sensors to detect a locked wheel, and then vent the brake line going to that wheel to unlock it. If anyone is interested, i can't imagine the system would cost more than 500 dollars, including my time to build it up for you. Lemme know, and i'll be happy to keep you guys updated. Oh, the traction level is driver adjustable from 2% to 20% slip, in 2% increments. Anyhow, take care and talk with you guys soon I hope!

Rion Motley
ODU FSAE TCS Specialist
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Old 09-17-2004, 10:17 AM
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I would look at the guy with the 510's setup first. He should do better than that. He may not have his brakes balanced properly front to back.....

I am curious if he was locking the brakes up, technique wise.

Generally, a really great driver with non-abs should be able to outstop a car with abs. The big advantage of ABS is being able to just stomp the pedal.
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Old 09-17-2004, 10:45 AM
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tcs homebrew

ya, that's why it's a pseudo abs. really all it does is detect when one wheel locks up before all the others, and it bleeds and reproportions the brakes in something like 1/100 second. Depends on the pressures, line diameters, and speed of the valves involved. I'll post a picture of the proof of concept model in about two weeks, once i get it actually built onto last year's car. Fun fun fun till my daddy takes the T bird away....

I personally prefer my '39 buick special 8 to a T bird. *14,000 all original miles, baybee!*

Later y'all,
Rion "Makes you drool" Motley :-) j/k
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