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Go Back   SR20 Forum > Motorsports > Autocross & Rally Racing



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Old 01-11-2004, 06:54 AM   #1 (permalink)
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Disable ABS on B13 NX2000 for autox

My '93 NX has ABS, and it doesn't work very well (design flaw, not a malfunction). Has anyone disabled the ABS, and is there an advantage to doing so?
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Old 01-11-2004, 11:20 AM   #2 (permalink)
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Yeah - youre brakes won't suck any more. Pulling any one of the plugs going to the ABS controller box on the passenger side firewall will disable it.

Do a search on 'chriscar abs' and you'll find more of my anti-abs rantings.

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Old 01-11-2004, 07:34 PM   #3 (permalink)
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What's so bad about the ABS?

Seriously.......most people I hear whine about it just say "well....um......I just don't like it...it sucks".

No reasons given.......

Now, I understand how the ABS can be a liability under full tilt track conditions, but for a street driven (or even autocrossed) car, the ABS is a benefit.......especially if you live in the snow-belt.

I also understand that the B13 setup is a simple 2 channel system.......but it'll still stop the wheels from locking, and gives you the confidence to just POUND on the brakes in an emergency situation on the street (kid chasing ball etc..), AND allows you more control on ice (even though the actual braking distance might be a little longer, you have more control...this can be VERY important).
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Old 01-11-2004, 10:55 PM   #4 (permalink)
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Quote:
Originally Posted by BIGBULS
What's so bad about the ABS?
Because I can modulate the brakes better in an autox situation than bad ABS can. It causes more problems than it solves. The ABS modulation happens too early, too aggressively, and cycles too slowly. Driving in snow is different. But again, I could probably handle the brakes better than bad ABS.

But a good ABS system (like the one on my BMW) will change my tune. I keep the ABS on when I autox the BMW and probably would keep it for doing a track day (although it's a little more scary in a high-speed spin than no ABS).


good ABS > human > bad ABS.


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Old 01-12-2004, 06:56 AM   #5 (permalink)
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See....now you have an actual reason (and for a very good driver...you are probably right).......................but it's still really only valid for track/autocross situations where you KNOW where and when you are going to have to brake.

On the street I still think ABS (even sh*tty 2 channel ABS) is superior 99 times out of 100 to having NO ABS (the spin situation you mentioned would be one of those times ).
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Old 01-12-2004, 11:56 AM   #6 (permalink)
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Just pull the fuse.
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Old 01-12-2004, 12:00 PM   #7 (permalink)
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Quote:
Originally Posted by BIGBULS
On the street I still think ABS (even sh*tty 2 channel ABS) is superior 99 times out of 100 to having NO ABS (the spin situation you mentioned would be one of those times ).
Do you own a B13 with ABS?

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Old 01-12-2004, 05:14 PM   #8 (permalink)
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Thanks everyone.

I am going to try it both ways, but have a predisposition that I will like no-ABS more.

And for the record, the problem I see with the B13 ABS is the layout. As I understand each channel forms a leg of and X; ie the drivers front and passenger rear are on channel. Well FWD cars are notorious for hiking the outside rear tire. And while it is unlikely I will be trailbraking the NX, lets exaggerate for a moment and say that the passenger rear is off the ground, or close enough that it does not have much weight on it. I am still on the brakes, so it locks up. ABS comes along and reduces brake pressure to that wheel, and the wheel that has the most weight on it. I just cannot see how this can be a good thing.
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Old 01-12-2004, 05:16 PM   #9 (permalink)
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Yes...as a matter of fact I do.............2 of them (a 93 SE-R and a 92 NX2K).

Like I said..........a trained driver may be able to outbrake sh*tty to mediocre ABS *IF* he knows when/where to brake (track conditions), but most of the time on the street you have NO warning (or very little) in emergency situations...........ABS gives you the confidence to POUND on the brakes without having to take time to modulate them.

And seriously..........who is actually trained well enough to be able to threshold brake EVERY time in EVERY situation? Even Patrick Bedard (a Car and Driver columnist who was in the Indy 500 TWICE in the 1980's) admits to not being able to threshold brake as well as even a mediocre ABS system without prior warning.

Even in autocross situations, I have had little to no problems with my ABS.....and since the ABS sensor on the right front wheel of my SE-R went out last summer, I HAVE had the opportunity to autocross with and without ABS...........and I have to say, I actually prefer to have it (not because braking is that much better, but because I have less tire lockup problems).
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Old 01-14-2004, 09:12 PM   #10 (permalink)
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My ABS has never worked so I don't have a B13 experience to share but I do have back to back tests with a 2.5 RS Impreza. With ABS on the pedal was more spongy and not as responsive, however it was a newer style system so "monkey braking" ( I'd just bury my foot in the pedal and let it work) was fairly effective. Without it pedal was nice and firm and easier to modulate.

We left it on most of the time for autox and off most times for track days.
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