Ride not as smooth after putting on new wheels

[Kostamojen]

I had an out-of-round tire that was doing that kind of thing. Tire had to be completely replaced.

On a side note, I think I want to start a "How NOT to ruin your car" thread...

[wparsons]

Originally Posted by SirBrass

Electric steering. Your wheel wouldn't vibrate due to that b/c steering column has no physical connection to the steering rack.

There is most definitely a physical connection to the steering rack, want proof... turn the wheel with the car not running.

The electric power steering is just a geared motor that adds assist to the steering column before the rack.

[SirBrass]

Originally Posted by wparsons

There is most definitely a physical connection to the steering rack, want proof... turn the wheel with the car not running.

The electric power steering is just a geared motor that adds assist to the steering column before the rack.

Nope, there's not. Not in our cars. That's not resistance you feel. That's a total lockout, and even if you got the wheel to turn, the wheels wouldn't.

Unless we're electric assist steering (which I'm pretty certain we're not).

Edit: In my STI, with the car OFF I could still get the wheels to turn with the steering wheel, though it was very hard. With the BRZ it's impossible.

[B-R-Z]

That sounds right, the steering is locked until you turn on ignition/accessory. I never realized why until now.

[DM7]

Originally Posted by SirBrass

Nope, there's not. Not in our cars. That's not resistance you feel. That's a total lockout, and even if you got the wheel to turn, the wheels wouldn't.

Unless we're electric assist steering (which I'm pretty certain we're not).

Edit: In my STI, with the car OFF I could still get the wheels to turn with the steering wheel, though it was very hard. With the BRZ it's impossible.

"Power steering" means "assisted steering". There is a physical linkage between the steering wheel and the steering rack. The effort at the steering wheel is reduced by either a hydraulic pump or electric motor.

Steer by wire on the other hand has no physical linkage between the steering wheel and steering rack when it is enabled.

86s use "Electric Power Steering". Not "steer by wire".

Edmund's details the steering system in 86s here.

http://www.edmunds.com/car-reviews/t...alkaround.html

Meanwhile, the 2013 Scion FRS's steering rack lacks any hoses, pipes or wires and looks 100-percent manual. Since this car has electronic power steering (EPS) ...

... And that thing is this: the 2013 Scion FR-S and Subaru BRZ use column-mount EPS. This is the area immediately under the dash, just above the pedals. It's a pretty small module, which isn't a big surprise, I suppose, because this unit does not overpower the steering overmuch and take away all feel.

Since the steering rack itself is truly manual, I wonder what it would feel like (apart from heavy parking effort) if this were removed and replaced with a straight shaft for zero assist on the track? The number of warning lights that would result on the dash would be truly alarming, I suspect.

[dobbrz]

Originally Posted by stugray

Adjustable coilovers still do not change ride firmness when you adjust them up & down.

Changing from one coil over to another can change ride stiffness, but the adjustable perches only change height.

Lol..there are usually dampening adjustments as well. It's not just height adjustments

[sshole]

Originally Posted by SirBrass

Electric steering. Your wheel wouldn't vibrate due to that b/c steering column has no physical connection to the steering rack.

ermahgerd

Have you ever looked at your steering rack before? It has a physical linkage that goes straight to... drum roll please... your steering wheel!

Look at this picture looking up from underneath the driver side of the car. You can see the end of the rack (with boot) and shooting up towards the firewall is the steering linkage. Which goes to the steering wheel.



Whodathunk?

[stugray]

Originally Posted by dobbrz

Lol..there are usually dampening adjustments as well. It's not just height adjustments

Just going by what he said.
The quote was:

Originally Posted by ZionsWrath

I had a set of adjustable coils ....

As far as I know there is no such thing.
My ground controls on my racecar have adjustable perches for the coils (does not adjust ride stiffness) and adjustable shocks (dampeners) that DO adjust stiffness.

It's all just terminology used improperly.

I just love it when people say "I'm going to upgrade my BRZ and get coil-overs!".
Ummm.. yeah, the car already HAS coilovers....

Now if I said I was going to upgrade my Porsche front end to have coil-overs, then that would mean something.

[ZionsWrath]

may already have coilovers but I don't see how they are adjustable.

[stugray]

Originally Posted by ZionsWrath

may already have coilovers but I don't see how they are adjustable.

I dont see your point. You can upgrade the stock non-adjustable coilovers to aftermarket non-adjustable coilovers too.

My point was everyone want to "upgrade my car to have coilovers" when the car HAS coilovers stock.

I think what people really mean is "I want to upgrade my car to have coilovers with adjustable spring perches and variable dampening shocks".

But just saying I want coilovers is like me saying "I want to upgrade my BRZ limited to have push to start".

And my first post was questioning you when you said "I had a set of adjustable coils ...."

If you meant "I adjusted the height of my coils" then it would not have made the ride any stiffer unless you lower the car onto the bump stops.

What you probably menat was "I adjusted my shocks to be stiffer".

[5hairpins]

I can say that little changes will make big differences. I got stock size Michelin Sport A/S 3 tires on 17x7.5 with +45 offset and the steering is much lighter on the new setup, almost too easy to turn the wheel now. Not sure if that is just the new tires or if something with the offset or sidewall shape is also playing a factor. Don't discount the smaller tire height or larger diameter wheels causing the change in ride quality.

[B-R-Z]

I didn't seem bad today so it might be my mind overlooking things now. I'm still going to rotate the wheels and see of there's a change. I'm going to swap fronts with rears and see what happens.

Is it possible for 1 wheels to have no inside-wheel weights while the other 3 have at least 4+? I just want to be sure the guy didn't accidentally forget to put then on. The one without inside weights does have a weight on the inside lip so it was definitely on the balancing machine.

[B-R-Z]

It didn't seem bad today so it might be my mind overlooking things now. I'm still going to rotate the wheels and see of there's a change. I'm going to swap fronts with rears and see what happens.

Is it possible for 1 wheel to have no inside-wheel weights while the other 3 have at least 4+? I just want to be sure the guy didn't accidentally forget to put them on. The one without inside weights does have a weight on the inside lip so it was definitely on the balancing machine.

[wparsons]

Originally Posted by SirBrass

Nope, there's not. Not in our cars. That's not resistance you feel. That's a total lockout, and even if you got the wheel to turn, the wheels wouldn't.

Unless we're electric assist steering (which I'm pretty certain we're not).

Edit: In my STI, with the car OFF I could still get the wheels to turn with the steering wheel, though it was very hard. With the BRZ it's impossible.

Wrong again, you most definitely can turn the wheels with the car not running. It's VERY hard because we have a very quick ratio rack, but it can be done. If you turn the key all the way off the ignition interlock stops the wheel, but if the key is in the run position with the car not running you can turn the wheel fully in both directions. If you put the front end on jack stands you can turn it very easily.

There's simply no way there would be any legit steering feel, nevermind such fantastic steering feel, with a steer by wire setup.