Abs!

[EFI69Cam]

Huh???

Matt

Just a comment on the nay sayers is all.

I'm not going to believe that 4th gen abs will not work on a 1st gen until my set up does not work.
The cars are similar in weight distribution, and there are dozens of 4th gens running around with 18" wheels and C5 front brakes. Loading up the trunk of your 4th gen does not render the abs useless.

I have not finished my car yet, but the 4th gen 4 channel module is plumbed and wired in, all tests with the tech 2 show that everything will work. I still have questions about the C5 and 4th gen sensors but the fact that the tech2 shows a resonable reading when I spin the front wheels tells me that everything will work.

[MonzaRacer]

THe big trick is getting the software programed(reprogramed ) to make sure it understands you have all 4 wheels running the same speed on the scanner.
For the most part a simple signal conditioner may be required similar to the DRAC (Digital Ratio Analog Control) that the older GM C/Ks used to have to make the speed sensor signal from trans make the lectronic speedo work properly, it basiclt turned a speed sensor signal to a squarewave (read cleaner signal as opposed to a sine waveform) for the dash cluster to read.
The big trick is to make sure the computer reads all 4 wheels the same going down the road.
A little work may also be required to tweak the software to understand that you have bigger tires, if the sizes are dropped or raised equally front/rear over the car the system came from your programming should be fine.
Im still working on some ideas for a universal system too.
Lee

[EFI69Cam]

THe big trick is getting the software programed(reprogramed ) to make sure it understands you have all 4 wheels running the same speed on the scanner.
For the most part a simple signal conditioner may be required similar to the DRAC (Digital Ratio Analog Control) that the older GM C/Ks used to have to make the speed sensor signal from trans make the lectronic speedo work properly, it basiclt turned a speed sensor signal to a squarewave (read cleaner signal as opposed to a sine waveform) for the dash cluster to read.
The big trick is to make sure the computer reads all 4 wheels the same going down the road.
A little work may also be required to tweak the software to understand that you have bigger tires, if the sizes are dropped or raised equally front/rear over the car the system came from your programming should be fine.
Im still working on some ideas for a universal system too.
Lee

If you match the reluctor wheel tooth counts of the sensors to the donor vehicle, there is no need to reprogram.

[calforniacuda]

If the reluctor wheel was used from the donor vehicle, than wheel diameters would need to be pretty close to stock or the computer would calculate cars speed incorrectly and abs is off a little bit.

Keep up the good work, great idea. Keep us posted. I have done mucho research and abs does stop vehicles faster on hard pavement. In snow it gets a little confused. Don't forget about proper brake proportioning between front and back, and sticky tires make a big difference, as well as lowering the car. The lower the car center of gravity, the less weight transfer moves to the front.

[MonzaRacer]

Well it works,sort of. The LSD equiped car made some wierd rearedn flucutaions but it stopped 45 ft shorter and this was with a hammer hard on the pedal.
What we used was a ZQ spindle on a Malibu (Gbody) and modded S10 4X diff. We hacked the Jbody EBCM and used the pump actuator from a Olds 98 and some rudementary sync boards.
It kind of kool it really worked and my scanner didnt hiccup when we scanned it.
We got so interesting mix and match but it worked!!!! Now we are reworking the software so it can be owner tuned for big and littles and different traction issues (re miss matched tires front and rear).
OK nuff fun I really need to work on my Monza.

[calforniacuda]

Is it possible to see a video?

[MonzaRacer]

Well we are reworking the EBCM (gotta love still having GM engineers phone numbers to help us decide on other EBCM as the Jbody drivers over heat with big car actuators.
Anyway no videos (yet) as we did this test at about 11 pm after finishing some sync boards (what we used to match wheel speeds.
EBCM reads 3 mph at rest but quite a few do that) but we hope to get it back out after his AirLocker comes in.
His LSD has some super over heated clutch plates so we took the springs out for now but the warp still preloads them.
He had driven the uber generic patched Jbody EBCM ( we put in some double duty generic power transitors and tied them to a PC heat sink/fan to keep them kool.
We are waiting on some chips for new EBCM so we can program(read this as weare gonna dump the Jbody controler but use the programing archetecture.
This turned int omuch more math than I like to dredge out of my dazed and weary mind (I am one class away from a Masters but too lazy to get it, besides I like working on cars).
Had to do some bias logs but it does work.
Dont get me wrong this isnt going to be traction or yaw control just wheel lock up control like most first/second generation ABS was.
too many factors for traction/yaw BUT we may be able to incorporate a parental anti burnout lock but that is still to be seen.
Maybe this weekend but if not it will be a couple weeks cause ,not this weekend but the next (18,19,20) is the first leg of the IBO triple crown Bow tournament in Bedford and I want to go meet some archery friends.
Well time for more math YUKKKKK!
Lee Abel
AFTERMARKET PERFORMANCE

[paul67]

monzaracer, did you ever do any further test of the abs and did it work.