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Electric power steering racks can be used in our cars?
Posted: February 10, 2023, 1:23 am
by tibimakai
My daily driver is an Alfa Romeo Stelvio SUV.
Today I have checked my steering wheel's lock to lock turns, and I was shocked, that it is only a bit over 2 turns, maybe 2.2.
It is electrically assisted of course.
I'm wondering if it could be used for our cars? I could remove the electric motor, and make a blanking cover to close that hole.
Sounds crazy, but maybe it is doable?!
I haven't check lengths yet, most likely it is to long and needs to be shortened.
What do you guys think about this crazy idea?
Tibor
Re: Electric power steering racks can be used in our cars?
Posted: February 10, 2023, 2:14 am
by KB58
Not crazy, and it's being done more and more often. A really good video on this is one from SuperFastMatt,
https://youtu.be/TpZkHs4Y5Ko
Re: Electric power steering racks can be used in our cars?
Posted: February 10, 2023, 10:09 am
by JAMADOR
Alternatively, given how light these are, why not go for a non-powered steering/depowered rack?
My former Locost had a manual rack & was on 10" wide Hoosiers, and steering effort was pretty easy, sitting still.
Re: Electric power steering racks can be used in our cars?
Posted: February 10, 2023, 12:22 pm
by tibimakai
I'm trying to find something that has less turns lock to lock.
Also, less modification to it the better.
I have a 442E chassis, so something around 21-22" from ball to ball would be preferable.
That electric steering column is very cool, but I'm thinking about using an electric steering rack, without the electric motor.
I have found some that have some damages, and this way they are cheaper.
I'm wondering, without the motor assistance, how they work? They even work without it, or they are much harder to turn?
Re: Electric power steering racks can be used in our cars?
Posted: February 11, 2023, 3:13 am
by kabuku6
You may be able to unplug the one in your car to find out. Would be worthwhile to jack the front up so you can feel what no resistance from the vehicle would be.
Re: Electric power steering racks can be used in our cars?
Posted: February 11, 2023, 8:08 am
by Miatav8,MstrASE,A&P,F
Makes sense. As with any rack, get the intermediate shaft or at least the pinion coupling to tie into whatever is coming off the column.
Re: Electric power steering racks can be used in our cars?
Posted: February 11, 2023, 6:58 pm
by tibimakai
There are 21 screws to remove the bottom cover under the car.
Maybe at my next oil change. Or just go with the Mazda steering rack.
Re: Electric power steering racks can be used in our cars?
Posted: February 11, 2023, 9:57 pm
by rx7locost
I never understood the specification of the "turn to turn lock". What I would be more interested in is how many inches the rack moves per turn AND turn to turn lock. This, combined with the steering arm length makes more sense. We don't know anything else about your front end design compared to the OEM setup. The sensitivity changes with the length of the arm.
My donor was the RX7. I depowered a previously power steering rack, used a smaller steering wheel, and shortened the rack. I never felt the need for power steering. The steering was sensitive but not difficult to get used to. I attribute that to the smaller steering wheel since the rack gearing and the uprights were the same as the OEM RX7. The lack of PS was not an issue. I don't know anything about a Stelvia.
Re: Electric power steering racks can be used in our cars?
Posted: February 13, 2023, 12:42 pm
by tibimakai
This is just a thought, most likely won't go with this steering rack.
It seems like I did not explain myself well enough.
I'm not trying to go electric steering. I'm thinking about using an electric steering rack, as a manual steering rack, removing the motor part.
I agree with you about the lock to lock turns, but I would like to get a steering wheel, that is not 4 turns. At least have a good starting point.
Re: Electric power steering racks can be used in our cars?
Posted: March 1, 2023, 10:00 pm
by CodySimonson
Here's a few links I've accrued to keep you entertained when researching electric power steering.
Depending on whatever rack you choose, an electric column may be beneficial since the less turns lock to lock generally means greater steering effort.
Subaru WRX/STI/BRZ and Toyota FRS electric steering retrofit
https://b.obsdian.com/category/retrofits/Some chevy electric power steering info (toyota prius I think too)
https://forums.hybridz.org/topic/125428 ... /#commentsChevy equinox column into a Datsun 240z
https://www.dropbox.com/s/uwtsk97izkkz4 ... .pptx?dl=0Lots more info on steering column swaps
https://www.corral.net/threads/35-elect ... s.2321889/
Re: Electric power steering racks can be used in our cars?
Posted: March 1, 2023, 10:08 pm
by tibimakai
Thanks for all that, but I went with a Miata NC steering rack.
Electric feels more artificial, which is contrary of what we are trying to achieve with these cars.
Maybe it is a good idea, if the steering effort is great.
Re: Electric power steering racks can be used in our cars?
Posted: March 1, 2023, 10:12 pm
by CodySimonson
tibimakai wrote:Thanks for all that, but I went with a Miata NC steering rack.
Electric feels more artificial, which is contrary of what we are trying to achieve with these cars.
Maybe it is a good idea, if the steering effort is great.
I'd imagine an NC rack will be fine. Personally I'll be using an electric rack. Not much more work for me and I will be able to adjust steering feel/stiffness.
Different strokes for different folks I guess.