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89-05 ELECTRIC Steering Rack, Adjustable!!!

 
Old 02-12-2019, 07:05 AM
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@ewsmotors, is there a way to output the steering angle and dc motor duty through CAN bus to log and do idle-up correction?
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
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Old 02-12-2019, 11:52 AM
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Looks like a Saturn/GM column modified to a Miata one with the PSCM attached. If that is the case I know the GM modules use information sent through a low speed network for it to know vehicle speed in order to control the assist amount.

Not sure of how MS uses CAN communication but if it is either a 0-2.5 volt pull up or down then maybe it could talk to a MS ECU.
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Old 02-13-2019, 05:55 PM
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Now I want one. I really like the idea of being able to have depowered and assisted steering in the same car. Being able to add assist when driving around in parking lots, or when my mom wants to drive my car or if I'm trying to drink a beer(jk) is very appealing. Is the rheostat something that is readily available? Just curious because I work with voltage adjust rheostats and they often go bad, but different environment for sure.
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Old 02-14-2019, 12:17 PM
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This is seriously cool. Not that I can afford it, but I would buy if I could.
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Old 02-14-2019, 07:17 PM
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For those concerned about "feel", there is nothing inherent to EPS that reduces feel beyond multiplying an input torque signal. EPS replaces the torsion arm in the PS valve body with a strain gauge, which is an opportunity to improve stiffness of the assembly for a given input torque (note this opportunity is best taken advantage of with the motor co-located with the rack). Lag, filtering, and damping may exist depending on the electronics used or calibration, for better or worse. S2K/RX8 have excellent steering and some of the first generation EPS racks. On the other hand, BMW reduced the effective outboard geometric arm between the contact patch and steering axis on the F30, which, so BMW says after increasing it in the G20, is why the steering feel was so bad on the F30 (I suspect the variable rack didn't help). I wonder if their decision was to reduce power requirements (and improve efficiency) from the electric motor.

This is a great offering, HPS is annoying to package and requires dealing with a (very) flammable fluid in the engine bay.

Ref:
https://jalopnik.com/the-engineering...ing-1830257906
https://garrett-engineers.com/cases-...o-fluids-burn/

I too am wondering about information than can be sent to the ECU for idle control and speed sensitivity (however a bit weary to trust the ECU to do this safely).

Three questions:

  1. Does the system retain the OEM computer from the booster (and corresponding safety features)?
  2. I think I can see the upper oiled sliders in one of the pictures - are the Mazda OEM collapsing stages maintained?
  3. What happens to the ignition switch/lockout?


Thanks,
Chris

https://www.facebook.com/GuarinoWatsonRacing/

Last edited by cwatson; 02-14-2019 at 07:51 PM.
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Old 02-18-2019, 10:01 AM
  #26  
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For this price tilt steering adjustment would be a clutch deal...

Otherwise I'm pretty "Meh".
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Old 02-18-2019, 02:37 PM
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Originally Posted by 90LowNSlo View Post
For this price tilt steering adjustment would be a clutch deal...

Otherwise I'm pretty "Meh".
On our car we adjusted the steering column Tilt/Height with 2 Slightly Longer Bolts and Some Aluminum 3/8 ID - 3/4 OD Spacers from McMaster-Carr (https://www.mcmaster.com/catalog/125/3376) to get it to where it feels best and we found we just leave it there.
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Old 02-18-2019, 09:00 PM
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5mm spacers on my column with lotus seats on flipside brackets and I'm 5'9. Feels almost perfect, might try the 10mm I have.
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Old 02-18-2019, 10:25 PM
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Originally Posted by brainzata View Post
5mm spacers on my column with lotus seats on flipside brackets and I'm 5'9.
Oddly enough, normal-sized people have differing opinions.


(Just gigvng you ****, dude. I know I'm a freak of nature. )
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Old 03-28-2019, 09:47 PM
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Originally Posted by Joe Perez View Post
Oddly enough, normal-sized people have differing opinions.


(Just gigvng you ****, dude. I know I'm a freak of nature. )
Hey man, average height is 5'7
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