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  To Rear Sway Bar or Not To....

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Author Topic:   To Rear Sway Bar or Not To....
stang67_460
Journeyman

Posts: 10
From: Essex,VT,USA
Registered: Jun 2002

posted 07-12-2002 04:52 AM     Click Here to See the Profile for stang67_460   Click Here to Email stang67_460     Edit/Delete Message   Reply w/Quote
When should you use one and when should you not. I see a bunch of handleing kits that as you go up in performance they do not use a rear sway bar. I thought a rear sway bar was better?

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68 S-code GT
Gearhead

Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000

posted 07-12-2002 08:05 AM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
If you only go straight then you donít need one! It will make a big difference in your handling around the corners.

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Boss302
Gearhead

Posts: 841
From: Coleman, Wisconsin
Registered: Jan 2002

posted 07-12-2002 08:37 AM     Click Here to See the Profile for Boss302   Click Here to Email Boss302     Edit/Delete Message   Reply w/Quote
go for the sway bar. i don't think i could live if my car didn't have any

------------------
Max
-1989 Mustang GT
225/50R15 tires :) can someone say WIDE

http://mustangsandmore.50megs.com/Boss302.html

"The Horses Shake You Harder Than Sex, the Sounds Ring In Your Ears, Fact Is Your Engines Only on Idle"

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richard bohm
Gearhead

Posts: 373
From: tucson,az-luray,va
Registered: May 2001

posted 07-13-2002 03:51 AM     Click Here to See the Profile for richard bohm   Click Here to Email richard bohm     Edit/Delete Message   Reply w/Quote
some racers dont use a rear anti-roll bar when they use a locker rear end. personally i like using the rear bar with or with out a locker. go for it.

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Daniel Jones
Gearhead

Posts: 500
From: St. Louis, MO
Registered: Aug 99

posted 07-13-2002 11:31 PM     Click Here to See the Profile for Daniel Jones   Click Here to Email Daniel Jones     Edit/Delete Message   Reply w/Quote
> When should you use one and when should you not. I see a bunch of
> handling kits that as you go up in performance they do not use a
> rear sway bar. I thought a rear sway bar was better?

What you are seeking is a balance of roll stiffness front-to-rear.
The rear bar should trim the rear roll stiffness to make the car
neutral in most turns. A bit of understeer is usually desirable
at the limit (for safety), particularly with lots of power, but
some autocrossers like the car to oversteer at the limit. A neutral
car will have the front and rear tires losing traction at the same
time when the car is in a steady turn.

Lots of things factor into the equation: front and rear spring rates,
front sway bar size, static camber and camber gain, tire size,
weight distribution, etc. Chassis stiffness is also very important.
If the structure isn't stiff enough, a large sway bar will cause the
body or pick up points to twist or deflect under the load. If you've
not already done it, the first thing to do is install weld-in subframe
connectors, a Monte Carlo bar, and one piece export brace.

With my current set-up, my '66 fastback has a 1" sway bar and no
rear bar and is very neutral, even with the 351C. This is because
of my spring rates and most importantly the Global West control arms
which radically change the camber gain. With stock front control
arms, the car would understeer and a rear bar would help. Eventually,
I plan on installing a torque arm (with Watts or Panhard) and coil
over rear springs. Torque arms require more rear stiffness, so I
may need to add a rear bar at the same time.

Global West has a chart in their catalog (might be in their website)
of what size sway bars they recommend for the various years and engine
options for both early and late model Mustangs. It might help to
get a look at it.

Dan Jones

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