Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Classifieds > Miata parts for sale/trade
Reload this Page >

89-05 ELECTRIC Steering Rack, Adjustable!!!

Miata parts for sale/trade Buy, trade or sell your Miata parts here.
Sponsored by:
Sponsored by:

89-05 ELECTRIC Steering Rack, Adjustable!!!

Old 02-12-2019, 08:05 AM
Supporting Vendor
iTrader: (10)
Reverant's Avatar
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,561
Total Cats: 234

@ewsmotors, is there a way to output the steering angle and dc motor duty through CAN bus to log and do idle-up correction?
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?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
Reverant is offline  
Old 02-12-2019, 12:52 PM
Junior Member
Join Date: Apr 2018
Location: Charleston, SC
Posts: 78
Total Cats: 11

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.
L337TurboZ is online now  
Old 02-13-2019, 06:55 PM
Junior Member
iTrader: (4)
Join Date: Apr 2011
Location: Bay Area- East Bay
Posts: 472
Total Cats: 11

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.
brainzata is offline  
Old 02-14-2019, 01:17 PM
Senior Member
Join Date: Jul 2016
Location: San Diego
Posts: 548
Total Cats: 52

This is seriously cool. Not that I can afford it, but I would buy if I could.
2slow is offline  
Old 02-14-2019, 08:17 PM
Join Date: May 2014
Posts: 25
Total Cats: 1

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.


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?



Last edited by cwatson; 02-14-2019 at 08:51 PM.
cwatson is offline  
Related Topics
Thread Starter
Last Post
Godless Commie
General Miata Chat
11-05-2018 11:21 AM
General Miata Chat
04-16-2018 01:54 PM
Suspension, Brakes, Drivetrain
11-06-2012 10:28 PM
Race Prep
01-16-2012 04:20 PM
General Miata Chat
12-14-2010 12:48 AM

Thread Tools
Search this Thread
Quick Reply: 89-05 ELECTRIC Steering Rack, Adjustable!!!

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.