I didn't think you took your ST on track?

The rear end will always want to overtake the front when braking mid corner. Stiffening up the front end won't eradicate that issue.

 

Swave & Summit do a front strut brace but on the images it looks like part of the scuttle needs removing.
Not sure ifit will cure oversteer at high speeds though.

 

It's super annoying that's why I specifically asked for an anti roll bar. The one you're talking about, to install it, wipers and all the plastic around the window need to come off. Also not sure about the effectiveness. Ford Performance themselves offer a carbon fibre strut tower brace also.

 

Just buy a different/better car that can eat corners at 100mph...

 

It's always going to be a compromise. You either want a car that is set up for fastish road which I guess a Fiesta ST is as standard, though they are faster cars available or an all out track/ private road car?
They are quite different. In my opinion.

 

ARB's, especially on the front, are not going to get the desired effect you're after.

You'll need to spend a fair bit more on some adjustable dampers, some camber and some aero.

All that aside, you'll need to adjust your driving style massivley and not induce lift-off oversteer/imbalance the car mid corner by applying the brakes.

 

It's not a dampers job to control pitch and roll. Hence the name anti roll bar. Aero doesn't work at those speeds, nothing noticeable anyway. It's still a fiesta. If it were a properly designed go kart or aerial then yes.

I'm not inducing anything. The radius of the corner determines if it will over steer or not. The tighter the turn, the more over steer

 

Coilovers set up properly essential.

 

You do know the front is already a coil over setup. Albeit not an adjustable one. On a new car, coil overs do stuff all. I know from experience. Also no one is going to adjust settings on a weekly basis. So again, what are the benefits?

 

If you're constantly having issues oversteering coming into corners, especially at those speeds and not inducing it, then you're clearly exceeding the grip limits of the car.
From post history you also don't sound like you have the smoothest of driving styles, so slower corner entry and less hectic driving style will possibly help much more than some ARB's.

 

Slower corner entry would work if it were not FWD. You can't be slow in and floor it upon hitting apex as the car will just torque steer everywhere and you will also spin the wheels and then probs understeer into something. I've tried your recommendation.
I think the car really is maxed out which is odd coz a GR86 can do it no issue. Same corner, same speed ... all good.
Not to be an arse, but I know how to drive. I've got 29 Karting trophies so far saying so.

 

You generally don't stab the accelerator coming out of a corner, smooth application.
I've done numerous track days in fwd cars and have never had understeer issues coming out of corners.

Different cars have different grip profiles, it's not a one size fits all.

Go karts handle a tad different to a car, driving styles don't necessarily translate from one to the other. I get the point you're trying to make, but I still think it's a driving style issue as well. Partially anyway.

Not saying you're a poo driver, you just might need to smooth it out a bit to get the desired results in the fez.

 

Smaller rim size and larger profile tyre

low profile tyres have no give before traction breaks meaning it’s a lot harder to make smaller adjustments based on feel. A bit of toe in on the rear would help so maybe some shims made up for the stub

the main thing is not lifting off the throttle completely and left foot braking to adjust speed
Rear tyre pressures too, do some playing, the lower you go the less snappy it will be

 

Smaller rim size and larger profile tyre

low profile tyres have no give before traction breaks meaning it’s a lot harder to make smaller adjustments based on feel. A bit of toe in on the rear would help so maybe some shims made up for the stub

the main thing is not lifting off the throttle completely and left foot braking to adjust speed
Rear tyre pressures too, do some playing, the lower you go the less snappy it will be

Yep, thanks bud. I've had a performance wheel alignment done. I always ignore factory specs with my cars when it comes to parts "touching" the road ie I run 32 psi cold where the plate says something like 38psi from memory. Sorry I forget.

It's not snappy per se! Guess you can't expect too much but the pivot point really becomes the front inside tyre.

Unless someone knows of a company who does make roll bars for the front, I'm probs left with simply living with it. (Admittedly, installing 2 on the back probs isn't the best idea)

 

Understeer and Oversteer - How to Remove - Suspension Secrets

 

Understeer and Oversteer - How to Remove - Suspension Secrets

Understeer and Oversteer - How to Remove - Suspension Secrets

This is actually a really good article 👍

 

It is indeed. Lots of recommendations to do just as suggested earlier on... Dampers, camber/geometry, aero.

The Fiesta is FWD, a GT/GR86 is RWD, not to mention a completely different bodyshape, wheelbase and weight distribution. Can't compare the two for how they take a corner.

It may well be a Fiesta, but if you're so keen to rag it at 100mph through a bend, then aero is most definitely on the table. As are adjustable coilovers that you adjust per track. p.s. Coilovers is a term given to aftermarket suspension, the front is indeed already a 'coilover' but that is not what is being referenced.

You say yourself that the car is worse since having the ARBs on the rear...which is quite basic knowledge on a FWD car that a stiffer rear end will become looser.

If anything you want to remove the rear ARB or at least soften them, not put one on the front too. That will not allow the car to roll as much and it may well end up just pushing through the bends and understeering as the front end can't dig in as much.

 

It is indeed. Lots of recommendations to do just as suggested earlier on... Dampers, camber/geometry, aero.

The Fiesta is FWD, a GT/GR86 is RWD, not to mention a completely different bodyshape, wheelbase and weight distribution. Can't compare the two for how they take a corner.

It may well be a Fiesta, but if you're so keen to rag it at 100mph through a bend, then aero is most definitely on the table. As are adjustable coilovers that you adjust per track. p.s. Coilovers is a term given to aftermarket suspension, the front is indeed already a 'coilover' but that is not what is being referenced.

You say yourself that the car is worse since having the ARBs on the rear...which is quite basic knowledge on a FWD car that a stiffer rear end will become looser.

If anything you want to remove the rear ARB or at least soften them, not put one on the front too. That will not allow the car to roll as much and it may well end up just pushing through the bends and understeering as the front end can't dig in as much.

I dont know if you have ever had any stuff 3D scanned and printed. It's really expensive and not worthwhile in my experience. I've got a flat under floor 3d printed for my muscle car and it's honestly zero benefit given the costs. So again, for a road car and the speed you will be going, aero isn't a thing. Even the Ferrari and their S ducts etc, it's all a marketing gimic. They don't even quote down force figures.

I rag the Fiesta around corners because it's a fiesta! It's a lot more expensive damaging other cars.

 

Not sure why you're on the defensive when people are offering up answers and suggestions to the issue you have requested such responses to.

Can either take it all onboard and make the car better, or ignore it and continue to have problems.

 

Right! So spend lots of money on aero and have no effect, got it. All I'm saying is aeronis pointless. That's last on the list in my opinion. Suspension first is obviously the way to go.

So long story short, no one knows if anyone makes a full kit of sway bars for these cars? A full kit would be adjustable on both ends (per that article)

 

The only thing I’ve seen for any Fiesta ST to stiffen up the front end fits LHD cars only.
There’s a simple way to find out if there is anything and that’s to Google it (other search engines are available)… I can’t find anything on there so I’d say no.


As has been said before, treat the car with some sympathy and you won’t have all the problems you do, and that includes cornering at 100mph… 🙃

 

The only thing I’ve seen for any Fiesta ST to stiffen up the front end fits LHD cars only.
There’s a simple way to find out if there is anything and that’s to Google it (other search engines are available)… I can’t find anything on there so I’d say no.


As has been said before, treat the car with some sympathy and you won’t have all the problems you do, and that includes cornering at 100mph… 🙃

I couldn't find anything neither besides the strut tower brace hence started this thread. Don't really want the entire front being dismantled to fit them but thanks anyway for your reply.

 

https://moretorque.co.uk/product/sw...roduct/swave-summit-front-upper-strut-brace-for-fiesta-mk8-st-1-5-1-0-ecoboost/

 

I might be missing something, but when you say the rear ARB / braces you have work great together what do you mean?

You’ve said that they make it twitchy at higher speed cornering (which is a resultant of making the rear firmer) but then in the next sentence you’ve said you don’t want that?

If you make the front harder then you’ll just lose the benefits of sharper change in direction that you’ve added. If you want less oversteer just take the braces / ARBs you’ve added back off surely?

 

I might be missing something, but when you say the rear ARB / braces you have work great together what do you mean?

You’ve said that they make it twitchy at higher speed cornering (which is a resultant of making the rear firmer) but then in the next sentence you’ve said you don’t want that?

If you make the front harder then you’ll just lose the benefits of sharper change in direction that you’ve added. If you want less oversteer just take the braces / ARBs you’ve added back off surely?

What you are saying is correct!

So, at low to medium speeds (below 120kmhr) the car turns in great. Very direct and the front goes wherever you want it to.
At high speeds (above 140kmhr) the car is very twitchy and it feels like the rear wants to come around all the time. This is my first FWD car besides rentals, but I've never had to counter steer at all before this Fiesta. I didn't know it was a FWD thing.

Maybe I'm I'm bit greedy but my thoughts are stiffening the front too will fix the high speed over steer whilst keeping low and medium speeds the same or very similar. This worked well for all my other cars but they are all high powered longer wheel based RWD sedans. They both have full front and rear kits from Whiteline and making both front and rear on maximum stiffness (they are adjustable) has added grip and turn in at all speeds without weird handling characteristics.

Seeing as I couldn't find anything, I'd just learn to live with it as removing the 2 rear bars will make the car less fun most of the time.