Jump to content
aaronr

autocrossing without a rear sway bar?

15 posts / 2126 viewsLast Reply

Recommended Posts

I have an autocross this weekend and am driving the 70 2002. I have a broken rear sway bolt so I'm thinking about running with no rear sway bar at all.

Will it give me less inside wheel spin?

car has bilsteins and H&R sport springs.

Yoko A032R race tires.

What do you guys think?

Share this post


Link to post
Share on other sites

I think you would have so much rear body roll that you might bend your front sway/ break off a mount or two.

Is replacing a bolt that hard to do?

Share this post


Link to post
Share on other sites

I used to disconnect my rear sway bar when autocrossing, but I had the REALLY stiff Ireland Engineering sway bars. I found it was hard to take those tight slow turns around cones.

Share this post


Link to post
Share on other sites

I don't have a lift and the broken bolt is not cooperating when trying to get it off. I'll need a lift to get at it I think.

Certainly don't want to hurt the front pieces though...

I think you would have so much rear body roll that you might bend your front sway/ break off a mount or two.

Is replacing a bolt that hard to do?

Share this post


Link to post
Share on other sites

I don't think it will break your frt hardware but it's going to understeer!

Share this post


Link to post
Share on other sites

No big deal, and will probably help. I've been running without a rear bar for probably 5 to 10 autocrosses now. I've got a big front sway, polys all around, Bilsteins/H&Rs, 215-50-13 R-tires, etc. I've done it with and without a strut brace.

I used to get a crapload of wheelspin in corners (even with a 25% E21 LSD), and it was horribly frustrating and slowed me way down. I took the bar off, and I go way faster. There's more rear body roll, sure. But atleast I'm propelling myself and getting faster times. I'll hopefully get stiffer springs soon to help counter it.

Share this post


Link to post
Share on other sites

Back in the day, Metric Mechanic recommended their sway bar (street 7/8ths or racing size 1 inch) with no rear sway bar.

What do you think Steve K?

John

Share this post


Link to post
Share on other sites

what springs do you have in the rear?

I tried running no rear bar with 500lb springs and there was still way too much roll. This was done to try to resolve rear wheel spin. There was so much roll that the car was still lifting the inside rear of the ground. Next step is to try 750lb spring. I wish i knew the spring rate for IE bars.

You are not going to hurt yourself or the car, you just might be a little slower

steve k.

Share this post


Link to post
Share on other sites
what springs do you have in the rear?

well, now, that's the real question innit?

You won't hurt anything by trying, except maybe your front

tires. An anti- sway bar is just another spring cross- linking the

rear suspension. You'll have a little less effective rear rate without it.

The hot Formula Vee suspension for a while was one rear spring that

had zero roll resistance.

I've raced without one, I've raced with a stock one, I currently use the

bigger Ireland one with softer rear springs to try to get better rear traction

while not understeering like a little piggie... It's all just a bit different.

And other factors like camber and damping will also affect front- to- rear balance, too.

The one thing to make sure is that it can't operate in one direction only-

if you unhook only one end, it's pretty likely that the loose end will contact

the trailing arm when you're leaned over one direction or the other, and

then you get some funky transitions to 'oh, nuts' oversteer...

my '02,

t

Share this post


Link to post
Share on other sites

I'm certainly not concerned at all with tire wear.

I'm going to try it.

The bar came of easy, I just took the whole bar off. Only took a few minutes.

I'll try to fix the bolt so I can take a few runs with and a few without and report back. We have a full saturday to run before Sunday competition.

Share this post


Link to post
Share on other sites

HMMMM. I just drove the car with the rear bar off and I'm getting a nasty metallic repeated suspention clunk noise under hard left turns. Sounded like it was going to break something......crap!

Share this post


Link to post
Share on other sites

Probably the exhaust hitting something, the left driveshaft is a likely candidate.

Share this post


Link to post
Share on other sites
HMMMM. I just drove the car with the rear bar off and I'm getting a nasty metallic repeated suspention clunk noise under hard left turns. Sounded like it was going to break something......crap!

removing the bar should not start any noises unless you left some parts on the car

steve k.

Share this post


Link to post
Share on other sites

I also just put in a new rear subframe, maybe I have a spring incorrectly placed or something. I'll have to look. Sounds Spring/bumpstop related to my ear, althought it sounded like it came from up front.

Share this post


Link to post
Share on other sites

Fixed the problem. My resonator was hitting the driveshaft.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.