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Originally Posted by chicane
I dont think you are in dreamland on this, but there are somethings that need to possibly be re-thought. The first problem I see is going to be the different wheel speed sensors being used on the front and rear.... the EBCM/EBTCM will have problems with that. I dont know if the algorithms will cover a tooth count spread of that nature... I would think that it would, but I can not say 'yes' to that right now.
Which year impala/caprice spindle are you talking about exaclty ?? I'll look into this.......
Considering that you are intertaining the use of a C4 IRS system, I would think that using the 96 EBCM would make your life much eaiser. Traction controll can always be added.... not to mention that a better TCS/ASR system could be utilized and tunable as well. I also think that the front spindle/tone ring issue would be eaiser to tune around, but your still going have a frequency issue. It gets difficult to tune the system (not to mention the saftey issues involved) when there are a bunch of missmatched parts used to put together a system. That is why it is always better to use a single, like system, and all of its components to build a cheaper, safer and more reliable end product.
If you use a 98+ EBTCM you should used the sensors from that system. If you use a 97 or 98+ EBCM you should use those sensors. Its kinda looking like the IRS idea may not be an answer to your chassis ideas. If it is something that you have decided that you have to, or want to have..... you'll need to adjust your ABS system requirements around that.
The easiest way to approach this would be to use the ATS tall spindle for the 70 F-body and the future Chicanewerks rear differential conversion (that I am working on as we speak), that uses the rear C5/C6 wheel speed sensors. That way you are using the same front and rear that already match a given ABS controller. From there you can utilize the Bosch 5.7 (or the 8.x from the 2001 which is the much improved and latest model 5.x system) from a 97 or 2001 Y-body.
Then have all the same sensors, EBTCM, BPMV, PCM and BCM..... and they all work together..... without any modifications other than nulling the sensor inputs that you are not going to use.
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I have thought about this with ATS's new spindle and before that the b-body spindles. Does an Impala SS or F-body ABS system use the same signals as the C5/6 wheels speed sensor. The rear sensors should be fairly easy to add off a B or F body.