All over the road... suspension improvement possible?

T

ToMang07

New member
Ok, so I've got a couple thousand miles on the car now, and overall, I absolutely love it.

My issue I think is twofold.

One, on a hard acceleration, I get torque steer. On a flat road, it's manageable.

Two, on crowned roads, specifically changing lanes, it's scary under power, the car is all over the damn place.

I'm very convinced it's a torque steer issue. under normal driving conditions to moderate acceleration, it's fine. But if I'm feeling froggy and goose it.... just about every time the road dips, changes angles, etc, the car just wants to go whichever way the road dips.

The one thread I found with traction bars seemed to indicate that they didn't help. I found a couple with upgraded adjustable stabilizer end links. Outside of that....what options are there to minimize/reduce this issue?
 
Hey boss! 

I can relate,  we have some crappy roads here in Oregon,  they full the ruts with patch pavment and under hard accel the car LURCHES from left to right as it moves across. 

I found that my issue was tire related,  i had Conti-DWS 06's and when they were about 18-19k worn they would cause the behavior to be come exaggerated.  once i replaced them with my pirellii's the issue is much less pronounced...

*but* i can still feel it and always have.  under hard pedal action the traction control (disabled or not) shifts power dynamically from front to back..and only seems to do it under hard acceleration so it literally just shoves 150+ftlbs to the back... then doesn't.. then does it again.  it makes the back push left or right depending on the ruts.. it feels weird.

on the other hand it means i can in limited fashion drift .. until it gets mad and shuts off the rears and then i can do 3rd gear burn outs :P
 
TopherSho said:
Hey boss! 

I can relate,  we have some crappy roads here in Oregon,  they full the ruts with patch pavment and under hard accel the car LURCHES from left to right as it moves across. 

I found that my issue was tire related,  i had Conti-DWS 06's and when they were about 18-19k worn they would cause the behavior to be come exaggerated.  once i replaced them with my pirellii's the issue is much less pronounced...

*but* i can still feel it and always have.  under hard pedal action the traction control (disabled or not) shifts power dynamically from front to back..and only seems to do it under hard acceleration so it literally just shoves 150+ftlbs to the back... then doesn't.. then does it again.  it makes the back push left or right depending on the ruts.. it feels weird.

on the other hand it means i can in limited fashion drift .. until it gets mad and shuts off the rears and then i can do 3rd gear burn outs :P
Click to expand...

LOL, thanks, I'll keep that in mind. I just feel there's gotta be a way to tighten it up.

My tires Yokohama ADVAN Sport V105.... front are around 30% tread remaining, rears are 85%. However they don't make these anymore, so I'll be running them at least for this summer, and hopefully in the spring I can put new ones on when I swap back to summer tires. I have Michelin Winter Michelin Pilot Alpin PA3 tires for it on SEL wheels) and I've been considering the Michelin Sport/Super Sport Tires when the time comes.
 
Mine does this and also has alot of bump steer. I replaced the front lower control arm bushings which seemed to help but its still there.
 
Hmm could be a problem due to the rears.  A) wider tire, B) more tread.  No rotation possible due to differing sizes, so i cant even say to swap f/r and see.  An idea MAY be to run higher pressure in the rears to reduce the contact patch some, if willing to experiment.
 
SHOdded said:
Hmm could be a problem due to the rears.  A) wider tire, B) more tread.  No rotation possible due to differing sizes, so i cant even say to swap f/r and see.  An idea MAY be to run higher pressure in the rears to reduce the contact patch some, if willing to experiment.
Click to expand...

Worth trying I suppose. I am already running 34PSI tho.
 
stock height, lowered?  Have you taken it in to have alignment checked and set properly?

When I lowered my car it was that way, Allll over the road, specially on bumps.  Even if you have not lowered, your alignment still could be off enough to cause those issues...

Other than that the other guys have covered most other possibilities.  Due realize though, this is a FWD biased drivetrain, they have torquesteer, though sounds like yours is pretty severe.

Hope some off that helps.
 
FWIW noticed my SHO has a bit of Tramline since upgrading from the stock 245-45-20 to 255-45-20 Dunlop Sport max Gt tires which have a firmer sidewall and handles corners like it's on rails... ...  :drive:
It drives nice & straight with precision,but on rare instances it will Tramline depending on the type of road.  Z
 
Just don't try to take any fast turns.  You'll understeer and plow like a farmer with that tire combo.

TQ steer is gonna happen, our car's front wheels are directly driven.  The rear's only get power occasionally and it's not even a big transfer, it's only about 150-200ft-lbs if I remember right.

Now if we had AWD systems like a Focus RS...oh boy, things would be very different.
 
Vortech347 said:
Just don't try to take any fast turns.  You'll understeer and plow like a farmer with that tire combo.

TQ steer is gonna happen, our car's front wheels are directly driven.  The rear's only get power occasionally and it's not even a big transfer, it's only about 150-200ft-lbs if I remember right.

Now if we had AWD systems like a Focus RS...oh boy, things would be very different.
Click to expand...

This isn't understeer.

And I'm not really even talking about turns. Here's an example, when I pass somebody under heavy throttle, the car almost dives as the crown in the road changes, creating an sway-like motion. This only happens under heavy acceleration. Straight line or curve doesn't make a difference, it's only under power and when the road dips or changes. (I.E right side crown to left side crown.)
 
lamrith said:
stock height, lowered?  Have you taken it in to have alignment checked and set properly?

When I lowered my car it was that way, Allll over the road, specially on bumps.  Even if you have not lowered, your alignment still could be off enough to cause those issues...

Other than that the other guys have covered most other possibilities.  Due realize though, this is a FWD biased drivetrain, they have torquesteer, though sounds like yours is pretty severe.

Hope some off that helps.
Click to expand...

It was aligned roughly 5-10k miles ago last year, I have the paperwork from the PO. Tire wear is very good so far and I have no reason to suspect it's an alignment issue. That said, I think I will add it to the list of things to be checked. (AKA paid for.) The car is lowered, but that was done a couple years ago roughly 15-20k miles ago. (Again, I have the service records.)

I obviously expect torque-steer, I am just trying to find out if there are ways to reduce it.
 
ZSHO said:
FWIW noticed my SHO has a bit of Tramline since upgrading from the stock 245-45-20 to 255-45-20 Dunlop Sport max Gt tires which have a firmer sidewall and handles corners like it's on rails... ...  :drive:
It drives nice & straight with precision,but on rare instances it will Tramline depending on the type of road.  Z
Click to expand...

Tramline.... Actually had to look that one up, lol

Yeah, that's more or less what it seems to do, it's just a bit hairy when you are pulling around someone and the car randomly dives toward the ditch or the car you're passing... lol
 
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