Steering, Suspension, & Brakes

tips, technology, tools and techniques related to non-driveline mechanical components

Go to Thread: PreviousNext
Go to: Forum ListMessage ListNew TopicLog In


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 02, 2016 10:59AM

Installing electric power steering in my Triumph TR6 made sense since parking it with the 245/45/17” front tires made it a bear to turn. What complicated my installation was the fact that I am using the GM tilt column from a Pontiac Fiero. Although it is just about the shortest tilt column you will find, the end of it still extends into the engine compartment, putting the EPS unit outside the interior space. The complication arises because the ignition and high-beam switches are mounted on the outside of the column, down low, and I did not want to disturb them.

A search on Google brought me to a well described EPS installation in a Pontiac Fiero. Perfect for me. This also went through the whole assembly process of the column itself. Included was a link to learning all you ever wanted to know about your tilt column.
EPS install in a 1986 Fiero GT:
[www.fiero.nl]
Inside GM Tilt Column:
[www.fiero.nl]


The most challenging part of my installation was attaching the EPS unit to the bottom of the column when they are on either side of the firewall. Hopefully I won’t have to remove it any time soon. Providing torque supports for the EPS unit was important.

Fabrication
After determining the placement of the EPS, I trimmed the GM column housing down to the needed length. I fabricated an adaptor sleeve to go between the salvaged EPS mounting base and the now cut column. After clocking it for correct orientation, the base was welded on.

With that length set, I assembled the inner shaft using the salvaged EPS female spline and adaptor tube, fabricated on a lathe to go between that spline and the tilt column ¾” D shaft. The Fiero website describes 3 different variations of this adaptation.
After trimming the EPS of unnecessary brackets, it was cleaned and painted. To provide torque support for it, I fabricated a pedestal to attach at the motor and an L bracket at the gear box end. Some re-working of the pedal box area of the TR6 was necessary.

Electrics
I salvaged the original Saturn Vue 30 Amp fuse holder which was mounted on the firewall. The potentiometer was mounted next to my headlight switch, below the dash. The controller box and Bruno box were mounted under the dash on the passenger side. This meant I had to extend the OEM wires that go between the motor and the controller box. Otherwise, the wiring was pretty straight forward as with all other EPS installations.

Steering Shaft
With a different output spline from what the original column had, I had to fabricate a new shaft. More lathe and welding work.

Do I like it? You bet I do. Not only is parking is a breeze, working the tight switch back turns in the Appalachian Mountains is so much more enjoyable. I find the potentiometer is a set and forget affair. I may wire in a switched circuit that has a pre-set resistor of my choice.

EPS mounting base, adapter sleeve + column housing:
IMG_0982.JPG

IMG_0983.JPG

IMG_0984.JPG

EPS female spline and fabricated adapter tube:
IMG_0951.JPG


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 02, 2016 11:02AM

Assembled inner steering shaft:
IMG_0985.JPG

Pre-assembly column components:
IMG_0987.JPG

Assembled GM Tilt Column with EPS:
IMG_1121.JPG

IMG_1123.JPG


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 02, 2016 11:05AM

Main components:
IMG_1120.JPG

Potentiometer:
IMG_1125.JPG

Controller and Bruno box:
IMG_1126.JPG

Finished Electric Power Steering:
IMG_1270.JPG


kstevusa
kelly stevenson
Southern Middle Tennessee
(778 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: kstevusa
Date: May 02, 2016 12:38PM

Nice Job Ken, "slick as as a Babys's Butt". The Dragon Beacons!


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5240 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: BlownMGB-V8
Date: May 02, 2016 12:57PM

Very nice work Ken. You've gotten really good at this sort of thing.

Jim


Jim Stabe
Jim Stabe
San Diego, Ca
(590 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: Jim Stabe
Date: May 02, 2016 03:59PM

Nice work on the EPS. How about an update on your Jag journal... Should be just about finished by now.

Jim


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 03, 2016 08:06AM

Jim Stabe,
The next update on my Jag Journal will probably be the EPS installation.
Ken



Charles
Charles Long
McDonald, TN
(147 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: Charles
Date: May 04, 2016 09:26PM

Ken, welcome to the darker side. Both of you guys will be amazed at how much better the driving is.

One of my car friends down in GA. has installed a EPS in his Fiero, the one with a Cady engine.

See you in Townsend shortly.
charles

I see you have GM cruise also. Question what is the set point for cruise?


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 05, 2016 12:35PM

Charles,
What do you mean by set point?
The cruise control in my TR6 is all OEM GM stuff controlled from the steering column stalk.
Ken


Charles
Charles Long
McDonald, TN
(147 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: Charles
Date: May 05, 2016 08:39PM

Ken, I forgot to mention how nice the install looks, but what can one say, your work is always top notch.
Guess what, now you guys will be able to one hand through the auto crosses, maybe cut time a few seconds.
You may need a three way switch, driving, parking, then auto cross.

Set point, is the minimum speed at which you can you set cruise?


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5240 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: BlownMGB-V8
Date: May 05, 2016 09:23PM

I think a set point of 25 mph would be good. For school zones.

Jim


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 06, 2016 05:25PM

Jim,
I do in fact use the cruise for that, (25 mph school zone).
Ken


Charles
Charles Long
McDonald, TN
(147 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: Charles
Date: May 14, 2016 07:27PM

Got to see this install first hand in Townsend, Tn, "Over the top" clearly a lot of thought and planning.

Well done, enjoy.

Good to see You and Katie again.

charles


Khan
Khan Caesar

(4 posts)

Registered:
08/04/2016 04:57AM

Main British Car:


Re: Electric Power Steering on a GM Tilt Column
Posted by: Khan
Date: August 07, 2016 10:30AM

Great Job, How about the calibration?


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: August 08, 2016 09:37AM

Khan,

By calibration, do you mean the potentiometer setting?

Quote:
"I find the potentiometer is a set and forget affair. I may wire in a switched circuit that has a pre-set resistor of my choice".

Right now, the pot is set at about 2/3 rds.

Ken



DiDueColpi
Fred Key
West coast - Canada
(1198 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: DiDueColpi
Date: August 12, 2016 03:36AM

Done a bunch of the EPS conversions now. (17 and counting) I don't ever think that I will even consider a hydraulic system again!
At one point I considered a variable assist circuit based on vehicle speed. To a person, all of my customers said that it wasn't required.
Everyone had found a sweetspot on the adjustment and left it there.

Live like you mean it.
Fred



Edited 1 time(s). Last edit at 08/12/2016 12:40PM by DiDueColpi.


zapskate
Conner Westra

(2 posts)

Registered:
08/19/2016 07:25PM

Main British Car:


Re: Electric Power Steering on a GM Tilt Column
Posted by: zapskate
Date: August 20, 2016 07:03PM

Hey, where did you get the pot and Bruno box and do you have a wiring diagram for the electronics?


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: August 22, 2016 09:24AM

Conner,
The pot and wiring diagram is included with the Bruno Box.
Here's the link on EBay:
[www.ebay.ca]
Ken


TR6-6SPD
Ken Hiebert
Toronto Ontario
(230 posts)

Registered:
04/23/2008 11:43AM

Main British Car:
1972 TR6 1994 5.7 L GM LT1

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: TR6-6SPD
Date: May 26, 2017 06:51AM

I finally got around to installing a "preset" circuit and switch for the amount of steering assist I want. I found I was checking the position of the potentiometer unnecessarily as I never really moved it off the 2/3 rds. spot. Having the rocker switch at preset gives me that, or "off preset" lets me adjust further.

IMG_1736.JPG



Edited 1 time(s). Last edit at 05/28/2017 06:45AM by TR6-6SPD.


Dan B
Dan Blackwood
South Charleston, WV
(878 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

authors avatar
Re: Electric Power Steering on a GM Tilt Column
Posted by: Dan B
Date: May 26, 2017 10:58AM

Ford light switches....


Sorry, only registered users may post in this forum.