its calibrated to the brake system. Even between 2nd generation models they 'tweak' the ABS parameters. If there's more braking force it may not unlock the brakes as expected. So any major change you'd test the different driving conditions.....superswire said:
Dual piston front caliper upgrade - writeup/instructions
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That's not how they work. They use the wheel speed sensors to detect lockup. If one wheels stops spinning, it just pulsates the pressure to that line. It basically cuts off the line pressure many times per second. And will actually over react if you have more braking because it will sense the wheel stopping and keep bypassing until it's under control. The parameters on these are simply monitoring the tone rings rotation vs vehicle and other wheel speed and reacting accordingly.
It doesn't measure the hydraulic pressure or flow. the parameters that it follows is based on the stock HARWARE as well not just sensor input. Different vehicles use the same Kelsey-Hayes modules but with different software. So it is not only logical that if you alter the hardware it alters the ABS performance, but as well from other people's experience of upgrading their brakes and performance with abs or traction control gives an undesired effect. These are 'blind' upgrades, not engineered, with fingers crossed hoping for the best.superswire said:
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No matter how powerful your brakes are, the abs module is still going to pulse the brakes. Its not hard to understand. If it sees a wheel lock up, its going to pulse the brakes. whether you have grease on your rotors or brand new 4 piston brembos on drilled rotors, it shouldnt need to be reflashed for your abs to work.
there is a step beyond what you're talking about. The ABS module may be the same for 2000 and 2002 & older vehicles but it has different parameters to match the differences in hardware . Not all Rodeos for example are four wheel disc, so they have different software. There is something called 'engineering' - when they update the drivetrain its decided by an engineering team and its TESTED vs someone installing hardware because it will FIT. Its a nice thought that parts just 'fall from the sky' and if they fit they are good. a lot of people do performance upgrades, but the net result is LESS performance, because it is 1/2 baked. Doing the 2 piston upgrade is cool but 'half baked ' because you're your own test pilot.
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Just to add my own anecdotal experience to the above debate on whether or not the Colorado brakes will affect ABS performance: the 4 wheel ABS on my 93 trooper has gotten a lot of use these past few winters and so I got a pretty good feel for when it activates and how effective it is at stopping me when braking on sheer ice with my old brakes.
Now that the roads are icing up again, and I've had a few very slippery stops, my impression is that it seems like the ABS wants to engage more easily (ie, ABS engages with less brake pedal effort than before when stopping on sheer ice) and I also think the front wheels will lock up slightly easier than the rear wheels now, although this seems to be handled perfectly by the 4 wheel ABS.
There is no discernable difference in the troopers ability to come to a stop when hard braking on sheer ice and the ABS is still only activating when it needs to. Hard to say whether the 2-wheel ABS equipped Isuzus would handle the brake mod as well but on 4 wheel ABS it seems safe to say that the Colorado brake mod does not negatively affect ABS performance.
Now that the roads are icing up again, and I've had a few very slippery stops, my impression is that it seems like the ABS wants to engage more easily (ie, ABS engages with less brake pedal effort than before when stopping on sheer ice) and I also think the front wheels will lock up slightly easier than the rear wheels now, although this seems to be handled perfectly by the 4 wheel ABS.
There is no discernable difference in the troopers ability to come to a stop when hard braking on sheer ice and the ABS is still only activating when it needs to. Hard to say whether the 2-wheel ABS equipped Isuzus would handle the brake mod as well but on 4 wheel ABS it seems safe to say that the Colorado brake mod does not negatively affect ABS performance.
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Great, let us know how it goes!
2000 Honda Passport 4WD Automatic, Leather, Pioneer AVH-4200NEX w/GPS driving 400 Watt Kenwood amp
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I have a 2000 Honda Passport (Isuzu Rodeo) with 16 inch wheels, a rebuilt Brake Master Cylinder and a flushed brake system, hopefully fully functional ABS (see my member intro post), ceramic brakes, the calipers pins are clean and greased. I have never been happy with the braking performance of this vehicle and have been thinking about a caliper upgrade for a while.
Having read this entire post I am going to install the braided stainless brakes lines, do a bleed of course and then drive it for a couple weeks. After that do the dual piston front caliper upgrade, I will report back how it goes.
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The problem with second gen Rodeo brakes is the master cylinder.
Check these out Isuzu Braided Steel Brake Line Set
2000 Honda Passport 4WD Automatic, Leather, Pioneer AVH-4200NEX w/GPS driving 400 Watt Kenwood amp
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I saw those, do you know the length? how much longer are they than stock? Its not stated other than "ok for stock or lifted", my Passport is not lifted, I don't intend to lift it and I am concerned about clearance issues (getting caught in stuff).
thanks
thanks
2000 Honda Passport 4WD Automatic, Leather, Pioneer AVH-4200NEX w/GPS driving 400 Watt Kenwood amp
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I emailed Independent4x4 (no response), called and still don't have an answer as to how much longer these braided brake lines are vs stock. -Isuzu Braided Steel Brake Line Set
Per the website description "These are a must have for increased braking performance on any truck. Whether you are completely stock, highly modified, or something in between you will greatly benefit from increases braking power."
So, I need a project (Can't sit here and read the forum all day) and the brake upgrade is on the top of my to do list, I just ordered the full set of stainless braided brake lines, hopefully will be here in a couple days, will report back on the length differences and any interference issues.
I am torn between doing the brake lines first and seeing how it performs, or doing the Colorado dual caliper mod at the same time, gonna be thinking about that one.
Per the website description "These are a must have for increased braking performance on any truck. Whether you are completely stock, highly modified, or something in between you will greatly benefit from increases braking power."
So, I need a project (Can't sit here and read the forum all day) and the brake upgrade is on the top of my to do list, I just ordered the full set of stainless braided brake lines, hopefully will be here in a couple days, will report back on the length differences and any interference issues.
I am torn between doing the brake lines first and seeing how it performs, or doing the Colorado dual caliper mod at the same time, gonna be thinking about that one.
2000 Honda Passport 4WD Automatic, Leather, Pioneer AVH-4200NEX w/GPS driving 400 Watt Kenwood amp
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I am wondering the same thing, since the 2002 Rodeo has dual piston calipers, and the master cylinder and brake booster are different part numbers then the 2000 Rodeo.
Can a 2002 Rodeo master cylinder fit in a 2000 Rodeo? or can I do a brake booster/master cylinder swap?
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If you can get hold of a Dmax master cylinder it will work wonders.
2000 Honda Passport 4WD Automatic, Leather, Pioneer AVH-4200NEX w/GPS driving 400 Watt Kenwood amp
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Thanks
Do you have a year range DMAX in mind? and is it a direct fit to the 2000 Rodeo brake booster?
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