Improving high speed stability

[garner]

About an hour ago I was chasing a run in Mexico, and about 110 my car was going all over the road. It was tricky trying to keep it in one lane. And when we hit a bump my pedals vibrated(almost like abs) and felt like a loss of steering control.

Everything is stock on the car except ford 07-09 polished bullitts and 235/55/18 yokohama yk580 tires(tires were purchased a couple months ago). There was very light wind(not sure on direction).

Any ideas on what could be causing this? It's pretty sad when my friend's f150 is more stable at 120 than a pony car at 110

[rriddle3]

At 120 mine is smooth as silk, so you might want to have the wheel balance and alignment checked.

[rlhay2]

Historically, Mustangs tend to lift the rear at speed. As has been mentioned, start checking the basics and go from there. Or slow down...

[Grandpa]

I've never understood why people chase behind. it adds another risk that isnt necessary.

[garner]

rridle I'll call the dealer and have an appointment set up to look at that

Hmmm never knew about the rear end lift. Think this is the only one that has acted this way, sadly

Idk why people chase around here but they do. It was 2 cts v racing though so I knew I would never catch up lol

[STROKD]

bigger wing in back
splitter in front
check allignment, throw a touch more toe-in and decrease caster. this will cause the car to be much more stable and less twitchy. Dont get crazy with the toe, 1/8" total is all you need, maybe 1/8" on each side which would be a LOT if your car has problems tracking straight.

wing in back will help the most though. esp if you dont have a spoiler and have a flat trunk lid. dont need a stupid indy car wing, just a functional spoiler, and the factory ones usually suck ass. look at Roush or Saleen for alternatives.

[Grandpa]

Originally Posted by garner rridle I'll call the dealer and have an appointment set up to look at that Hmmm never knew about the rear end lift. Think this is the only one that has acted this way, sadly Idk why people chase around here but they do. It was 2 cts v racing though so I knew I would never catch up lol

Should have been easy to catch them then. V's are slow POFs.

[Dominic Toretto]

My 2012 GT auto was very stable at high speeds in excess of 100mph bone stock. My vote is something is off with the stock suspension. I didn't need to buy an aftermarket wing or splitter to be stable.

-Alex

[DirtyD]

Have you checked the speed ratings on the tires you have? Doing 100+ MPH on 235 tires in a car weighing 3700# is bound to be sketchy.

[Zeek]

Were you one of the douches chasing when we all rolled out? A bunch of slow ass Stang's got in the way. I didn't get to race a auto vette because 3 Stang's were taking up all 3 lanes and he couldn't get up to the race.

[garner]

V speed rating, so 149. I'm wondering if it has to do with sidewall height. Cause both sets of my 245/45/19 never did this

Zeek I'm not in dfw

[Zeek]

Originally Posted by garner Zeek I'm not in dfw

Ok good lol Just happened on the same night and we had 2 Vs out running with us.

[DirtyD]

Originally Posted by garner V speed rating, so 149. I'm wondering if it has to do with sidewall height. Cause both sets of my 245/45/19 never did this Zeek I'm not in dfw

Probably a combo of the small tire width and sidewall

[BV600]

My old car did 202mph and was stable with Steeda Proactions, BMR Springs, Forgestars with 275/295 PS2s. Even felt stable with Nitto DRs at 180s.

This was on the Autobahn...Smooth roads unlike here

[Craizie]

202 radar confirmed?