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05-17-2014, 01:33 AM
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#1
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Senior Member
Join Date: Jul 2013
Location: Harker Heights, TX
Age: 30
Posts: 377
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Improving high speed stability
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
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05-17-2014, 07:59 AM
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#2
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Senior Member
Join Date: May 2013
Posts: 380
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At 120 mine is smooth as silk, so you might want to have the wheel balance and alignment checked.
__________________
2013 Cadillac ATS Performance, 3.6L
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Formerly:
2012 GT Automatic, Kona Blue w/Stone interior
The usual exhaust mods, JLT CAI, Brenspeed tune, BMR LCAs
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05-17-2014, 10:15 AM
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#3
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Senior Member
Join Date: Dec 2013
Location: DFW, TX
Posts: 119
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Historically, Mustangs tend to lift the rear at speed. As has been mentioned, start checking the basics and go from there. Or slow down...
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07 TT GT500 w/misc supporting mods
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05-17-2014, 10:47 AM
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#4
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I> /\/\
Join Date: Jun 2012
Location: A fender ahead of BlownAltered
Posts: 7,562
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I've never understood why people chase behind. it adds another risk that isnt necessary.
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05-17-2014, 01:10 PM
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#5
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Senior Member
Join Date: Jul 2013
Location: Harker Heights, TX
Age: 30
Posts: 377
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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
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05-17-2014, 02:14 PM
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#6
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Old School
Join Date: Oct 2012
Age: 46
Posts: 1,358
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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.
__________________
86 GT 374 Billet "W" w/ 72MMs
90 GT 351 Dart short stroke w/ YSi
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05-17-2014, 02:24 PM
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#7
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I> /\/\
Join Date: Jun 2012
Location: A fender ahead of BlownAltered
Posts: 7,562
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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
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Should have been easy to catch them then. V's are slow POFs.
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05-17-2014, 04:22 PM
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#8
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Senior Member
Join Date: Jun 2013
Location: Irving / Oklahoma City
Age: 41
Posts: 1,896
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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
__________________
2012 GT Premium Hardtop with XX Transmission
Mods page: http://dfw50s.com/showthread.php?t=3376
Ford Racing . Pypes . BMR . CDC . American Muscle . DDM Tuning . BFG . J&M . Amsoil . MMD. JLT
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05-18-2014, 01:58 AM
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#9
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Senior Member
Join Date: Jun 2012
Posts: 5,594
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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.
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05-18-2014, 02:19 AM
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#10
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Senior Member
Join Date: Dec 2012
Location: Mesquite
Age: 33
Posts: 466
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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.
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2008 C6 Boltons and Cam.
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05-18-2014, 02:51 AM
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#11
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Senior Member
Join Date: Jul 2013
Location: Harker Heights, TX
Age: 30
Posts: 377
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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
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05-18-2014, 03:37 AM
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#12
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Senior Member
Join Date: Dec 2012
Location: Mesquite
Age: 33
Posts: 466
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Originally Posted by garner
Zeek I'm not in dfw
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Ok good lol Just happened on the same night and we had 2 Vs out running with us.
__________________
2008 C6 Boltons and Cam.
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05-18-2014, 04:47 PM
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#13
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Senior Member
Join Date: Jun 2012
Posts: 5,594
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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
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Probably a combo of the small tire width and sidewall
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05-18-2014, 05:42 PM
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#14
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Senior Member
Join Date: Jun 2012
Location: Killeen
Age: 38
Posts: 391
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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
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2014 GT- A6 - ORX - Kooks AB - BMR Springs LCA Relos Panhard - Strange Adj Shocks/Struts - 17/15 Darkstars - Procharger D1SC - ID1000s - VMP BAP
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05-18-2014, 05:55 PM
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#15
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Member
Join Date: Jun 2013
Posts: 53
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202 radar confirmed?
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