AFM Web

Go Back   Ford Mustang Forums > Mustang Forums > 2005 + Mustang > 2005-2009 Mustang GT Tech
Welcome to AllFordMustangs.com. We look forward to you registering on our forum and making your first post.
 
Introductions | Lounge | 2005+ GT Tech | 2005+ V6 Tech | 2005+ Talk | Mustang Tech | Racing | Regional 
 

Reply
 
Old 07-05-2006   #1 (permalink)
mrvandermey is offline Top Dog

S197 Member


Joined: Jul 2005
Posts: 13,117 Threads: 265
 mrvandermey's Country Flag  View mrvandermey's 27 photos
San Francisco Bay Area   California
Question Rearend breaking loose

Okay, I have the Saleen suspension kit (essentially Eiback springs, sway bars and shocks) and an adjustable panhard bar, yet last night I took a corner sharp and quick, and to my surpirise the rearend broke loose and caused the tail to slide to the left (right turn). Is it normal for the rearend to slide out and cause the car to fishtail on dry pavement with a full suspension kit, or am I driving her to hard or expecting too much?

The good news, I was easily able to control the girl and keep her from loosing it all together, but was just shocked that the rear end broke loose like it did, and this was not the first time, just the most noticeable.
mrvandermey is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-05-2006   #2 (permalink)
2005s-281 is offline Rookie


Joined: Jun 2006
Posts: 19 Threads: 2
 2005s-281's Country Flag
Oak Harbor   Washington
Default

too much gas.. with the stiffer sway bars the car will come out quick if your on the gas hard. especially if your not used to it yet since there is no body roll
2005s-281 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-05-2006   #3 (permalink)
65sohc is offline Made Member

Classic Member
S197 Member


Joined: Mar 2004
Posts: 669 Threads: 42
 65sohc's Country Flag
Fresno   California
Default

Quote:
Originally Posted by mrvandermey
Okay, I have the Saleen suspension kit (essentially Eiback springs, sway bars and shocks) and an adjustable panhard bar, yet last night I took a corner sharp and quick, and to my surpirise the rearend broke loose and caused the tail to slide to the left (right turn). Is it normal for the rearend to slide out and cause the car to fishtail on dry pavement with a full suspension kit, or am I driving her to hard or expecting too much?

The good news, I was easily able to control the girl and keep her from loosing it all together, but was just shocked that the rear end broke loose like it did, and this was not the first time, just the most noticeable.
That is called steering with your right foot. I never do that with a girl in the car.
65sohc is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #4 (permalink)
stangcrosser is offline Made Member

S197 Member


Joined: Jan 2006
Posts: 447 Threads: 15
 stangcrosser's Country Flag
Hilo   Hawaii
Default

Can you adjust the sway bar or shocks in the rear to soften them, or increase the rear tire pressure some? Any of these will increase your rear traction on the type of surface that caused you to over steer. Another method is to do the reverse on the front end. The goal for control isn't to get the suspension as stiff as possible, but to have the car's suspension balanced front and rear. Then you can optimize speed and control through the corners. You can also use the throttle to generate over steer if you want to use it. I would consider our Mustangs to be sporty cars rather than sports cars. However, the chassis and suspension design does allow for exceptional handling from a car which compared to a Porsche (for example) has a long wheel base and is heavy.
__________________
'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
stangcrosser is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #5 (permalink)
mrvandermey is offline Top Dog

S197 Member


Joined: Jul 2005
Posts: 13,117 Threads: 265
 mrvandermey's Country Flag  View mrvandermey's 27 photos
San Francisco Bay Area   California
Default

Quote:
Originally Posted by stangcrosser
Can you adjust the sway bar or shocks in the rear to soften them, or increase the rear tire pressure some? Any of these will increase your rear traction on the type of surface that caused you to over steer. Another method is to do the reverse on the front end. The goal for control isn't to get the suspension as stiff as possible, but to have the car's suspension balanced front and rear. Then you can optimize speed and control through the corners. You can also use the throttle to generate over steer if you want to use it. I would consider our Mustangs to be sporty cars rather than sports cars. However, the chassis and suspension design does allow for exceptional handling from a car which compared to a Porsche (for example) has a long wheel base and is heavy.
No, I can not adjust the shocks for they are nonadjustable/fixed shocks, but the panhard bar is adjustable and I will look into that adjustment. I do not beleive I can put much more air presure in the rear tires, I am running 20" wheels with low profile tires.
mrvandermey is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #6 (permalink)
65sohc is offline Made Member

Classic Member
S197 Member


Joined: Mar 2004
Posts: 669 Threads: 42
 65sohc's Country Flag
Fresno   California
Default

Quote:
Originally Posted by mrvandermey
No, I can not adjust the shocks for they are nonadjustable/fixed shocks, but the panhard bar is adjustable and I will look into that adjustment. I do not beleive I can put much more air presure in the rear tires, I am running 20" wheels with low profile tires.
All the Panhard bar adjustment is for os to center the axle in the chassis when the car is lowered. It isn't used to alter under/oversteer characteristics. I'd say the best thing to do is go to a performance driving school and learn to control/enjoy what you have.
65sohc is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #7 (permalink)
tw0scoops123 is offline Senior Member

S197 Member


Joined: Mar 2005
Posts: 3,231 Threads: 244
 tw0scoops123's Country Flag  View tw0scoops123's 12 photos
Annandale   New Jersey
Default

Maybe you hit some gravel or something. Just cuz you have a suspension kit, doesn't mean it will grip the road like an iron fist, it will just corner better.
__________________
2005 Black GT Whipple HO | Oil Seperator | Steeda Tensioner | 93 dyno tune | Autometer Cobalt | GTAs
tw0scoops123 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #8 (permalink)
stangcrosser is offline Made Member

S197 Member


Joined: Jan 2006
Posts: 447 Threads: 15
 stangcrosser's Country Flag
Hilo   Hawaii
Default

Another thing to consider is the tires. The width, compound and tread pattern affect lateral traction. 65sohc's suggestion is the best. A performance driving school is fun, you will learn techniques such as how to use over steer, learn the limits of your car, and end up with the control you want.
__________________
'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
stangcrosser is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #9 (permalink)
kscoyote is offline Top Dog

V6 Member


Joined: Aug 2002
Posts: 19,314 Threads: 298
 kscoyote's Country Flag  View kscoyote's 220 photos  View kscoyote's 1 products for your review  View kscoyote's HomePage
Topeka   Kansas
Send a message via ICQ to kscoyote Send a message via AIM to kscoyote Send a message via MSN to kscoyote Send a message via Yahoo to kscoyote
Default

Quote:
Originally Posted by stangcrosser
Another thing to consider is the tires. The width, compound and tread pattern affect lateral traction. 65sohc's suggestion is the best. A performance driving school is fun, you will learn techniques such as how to use over steer, learn the limits of your car, and end up with the control you want.
no, no, you decrease the tire pressure! or run the front ones with a little more pressure.

increasing the tire pressure makes the tires deflect less, more precision and but less lateral grip

That's why you INCREASE the pressure to get better mileage -less grip/friction =>better mpg.
__________________
Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
kscoyote is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #10 (permalink)
5twenty is offline Senior Member

S197 Member


Joined: Mar 2005
Posts: 2,489 Threads: 189
 5twenty's Country Flag  View 5twenty's HomePage
Snoqualmie   Washington
Default

The FRPP (Eibach) front anti-roll bar is adjustable to change under/oversteer characteristics.
__________________
2005 Mustang GT with 04 Cobra iron block, 300 ci, Kenne Bell 2.6l twin screw, P&P S3 Heads, SS valves, Comp S3 cams, Currie 9+ 9" rear end and DS (coming soon), Hurst shifter, BMR K-member, A-arms, LCAs & UCA, JBA long tubes & mid-pipe, Accel COPs, GT500 fuel pumps, much more...
659 RWHP, 598 Tq @ 12 psi & 5800 RPM
5twenty is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #11 (permalink)
myltlpny is offline Top Dog

S197 Member


Joined: May 2005
Posts: 4,426 Threads: 115
 myltlpny's Country Flag  View myltlpny's 49 photos  View myltlpny's HomePage
Gloucester   Virginia
Default

This is purely accademic, but the problem is with the stiffer rear suspension, the weight is not being transfered properly. Changing tire pressure, may help, but at what expense? Over inflated tires are just as bad as under inflating them. And will it be enough to offset the increased stiffness of the suspension on the rear end? If the problem is during acceleration, you're not transfering enough weight to the back end. You need the extra weight for traction. The stiffer suspension isn't allowing the car to squat down and grab asphalt (ever see a drag car during take-off?) It seems you would need to upgrade the front suspension to equal what you did to the rear, or go with a slightly softer spring in the rear in order to re-ballance the car.
__________________
'05 Sonic Blue GT w/ '07 V8 engine, 5-sp, IUP, Beige leather interior, nothing else -
just the way I wanted it. (1 of 113)
OK, so I've added a few things to it. Check my Profile - too many to list here.
myltlpny is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-06-2006   #12 (permalink)
65sohc is offline Made Member

Classic Member
S197 Member


Joined: Mar 2004
Posts: 669 Threads: 42
 65sohc's Country Flag
Fresno   California
Default

Quote:
Originally Posted by kscoyote
no, no, you decrease the tire pressure! or run the front ones with a little more pressure.

increasing the tire pressure makes the tires deflect less, more precision and but less lateral grip

That's why you INCREASE the pressure to get better mileage -less grip/friction =>better mpg.
Not true. On street tires cornering grip increases as you increase tire pressure up to a point. Increasing pressure in the front relative to the rear reduces understeer, while increasing rear pressure relative to front increases understeer/reduces oversteer.
65sohc is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-07-2006   #13 (permalink)
JetBlack is offline Senior Member

S197 Member


Joined: Nov 2005
Posts: 2,988 Threads: 160
 JetBlack's Country Flag  View JetBlack's 23 photos
Coeur d'Alene   Idaho
Default

Quote:
Originally Posted by 65sohc
That is called steering with your right foot. I never do that with a girl in the car.
That's cuz you don't date my girl Lisa loves it when I get all testosteroni [the real San Francisco treat].

"I feel like peeling out."

"Ok. I think you should."

Then she says something that sounds like "Eeeeeeeheeeheeehee!!!!!" as I rev up and launch.

She then unabashedly giggles for about 20 seconds.
__________________
2006 Black, GT, spoiler delete, IUP, five speed, leather, custom welded straight pipes with resonators, Saleen short-shift adapter, sequential turn signals, custom anodized aluminum Longacre ventilated shift sphere. Spydershaft one piece aluminum driveshaft, w/ Spicer 1330 U-joints, Steeda UCA and LCAs. bye bye wheel hop, hello traction! SCT XCalII, BBK CAI.

*I hope to die peacefully, in my sleep, like my grandfather. Not screaming in terror, like his passengers.*
JetBlack is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-07-2006   #14 (permalink)
stangcrosser is offline Made Member

S197 Member


Joined: Jan 2006
Posts: 447 Threads: 15
 stangcrosser's Country Flag
Hilo   Hawaii
Default

Quote:
Originally Posted by JetBlack
That's cuz you don't date my girl Lisa loves it when I get all testosteroni [the real San Francisco treat].

"I feel like peeling out."

"Ok. I think you should."

Then she says something that sounds like "Eeeeeeeheeeheeehee!!!!!" as I rev up and launch.

She then unabashedly giggles for about 20 seconds.
I'd have to say that you're getting the best "mileage" out of your car as anybody.
__________________
'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
stangcrosser is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 07-08-2006   #15 (permalink)
06BlkMustanGT is offline Apprentice

S197 Member


Joined: Jan 2006
Posts: 78 Threads: 4
 06BlkMustanGT's Country Flag
Berwyn   Pennsylvania
Default

Also maybe try Rear LCAs and if nessacary UCAs

what are the sidewall profile and section width of the current tires?
06BlkMustanGT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply



Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
rearend axle swap from sn95 89notch 5.0L Tech 23 07-11-2006 09:26 PM
Help! How to tighten loose antenna base on 96 Mustang? rikard 4.6L Tech 2 07-07-2006 09:04 PM
Squelling noise coming from rearend when turning hellasmooth 2005-2009 Mustang GT Tech 4 06-26-2006 03:12 PM
Breaking in an engine Joes 5.0 5.0L Tech 3 05-16-2006 03:17 PM
Rearend troubles - howling noise jeff90lx 5.0L Tech 6 12-09-2002 11:55 AM

sponsors

Mustang Photos
Add to Favorites    Link to us    Contact    Directory    Site Rules    Archive    Terms of Use    Privacy    Top Sites    RSS    Meet Our Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2010 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112