WTB Hypertech 30026 - Chevy Impala SS Forum
 
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post #1 of 8 (permalink) Old 11-01-2018, 02:22 PM Thread Starter
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WTB Hypertech 30026

Hi everyone,

I have a 95 Roadmaster that I just put 275/50/17 rears and 275/40/17 fronts on, and now I have an ABS light. All I want is to change the tire size to get my ABS back. Obviously looking for one that's not still paired with a vin lol. Please let me know.

Thanks,

Tony

95 DGGM 396 Stroker, Eagle crank & rods, LT4 heads, LT4 intake, LT4 hot cam, Finish Line long tube headers, 2 1/2" exhaust, Big Baer brakes, 3.73 rear, Hotchkis lowering springs, Front and rear Hotchkis Sway bars, aluminum driveshaft, Metco aluminum boxed trailing arms, K&N, Gary's Cables, 42# Green Giants, T84's,T56 Magnum
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post #2 of 8 (permalink) Old 11-01-2018, 06:31 PM
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Bosch ABS is not part of the PCM.

You can reprogram the PCM to correct the speedometer and the shift point but the ABS will not be fixed.

You could change the reluctor in the axle.

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post #3 of 8 (permalink) Old 11-01-2018, 07:23 PM Thread Starter
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I didn’t realize that, I thought that changing the tire size via the Hypertech would fix the ABS.

Thank you for explaining this to me. I’ll see if anyone has one anyway, but that really makes it less interesting.

Thanks again

95 DGGM 396 Stroker, Eagle crank & rods, LT4 heads, LT4 intake, LT4 hot cam, Finish Line long tube headers, 2 1/2" exhaust, Big Baer brakes, 3.73 rear, Hotchkis lowering springs, Front and rear Hotchkis Sway bars, aluminum driveshaft, Metco aluminum boxed trailing arms, K&N, Gary's Cables, 42# Green Giants, T84's,T56 Magnum
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post #4 of 8 (permalink) Old 11-01-2018, 08:04 PM
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ABS won't tolerate differences in tire height between front/rear more than 5%,maybe even a little less...

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post #5 of 8 (permalink) Old 11-02-2018, 07:33 AM
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What's the maximum difference between an inner rear wheel and its diagonally opposite outer front wheel in a turn?
It'd need to be less than that, which I suspect is under 3%.

Both our PCM and ABSM expect the same size tires at all 4 wheels.

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post #6 of 8 (permalink) Old 11-02-2018, 01:59 PM
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Quote:
Both our PCM and ABSM expect the same size tires at all 4 wheels.
What connection is there between the PCM and the front wheels?

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post #7 of 8 (permalink) Old 11-02-2018, 03:33 PM
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The ABS is looking for the same wheel speeds front,and rear...

Winner 2001 Road Course (prep. class) Detroit,MI
Winner 2006 Drag race (SS class) Indianapolis,IN
Quickest event reaction time .013sec. (final-round)
Class Winner 2014 Charlotte,NC. 2016 NOLA car shows
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post #8 of 8 (permalink) Old 11-02-2018, 08:12 PM
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I have a Hypertech Power Programmer that has been sitting dormant in my closet for years.

I use TunerCats for my tuning and this is no longer necessary for my Impala. Well other than my Impala is no longer stock.

If you are interested, please PM and make offer.

Michael
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