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Old 06-15-2012, 08:43 PM   #1
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Default Sway bar set up Hybrid vs pair

Hey guys,

So i'm a noob looking into getting some sway bars for my 94 NA,

Would you guys recommend a RB tubular front with stock rear or a flying miata pair for front and back.

I have a Mishimoto radiator and am concerned about how much of the OEM shroud I need to trim for such a large sway bar OD (does anyone have pics of this).

Thanks
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Old 06-15-2012, 09:41 PM   #2
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Depends what spring rates.

Depends what use for the car.

Insufficient data.
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Old 06-15-2012, 09:45 PM   #3
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For a currently bone stock suspension set up and i don't plan to get coilovers for a while
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Old 06-15-2012, 09:47 PM   #4
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You didn't answer usage.

For autocross: big front bar.

For DD: Two bars.

Depends how much understeer you like.
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Old 06-15-2012, 09:51 PM   #5
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for a mix between auto-x and and tracking and a decent amount of drifting as well. I've only been auto-xing and drifting in my friends NA with FM sways, endlinks, and Tein flex 7/6 set up and that felt pretty awesome.


I'll prolly start with mostly auto-x and drift, and minimal understeer would be preferred

This car is not my DD so i don't really care how it feels on street but i do drive it on the street on weekends and etc.
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Old 06-15-2012, 09:53 PM   #6
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Bigger front bar = More understeer.

Bigger rear bar = More oversteer.

Swaybars are very simple.
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Old 06-16-2012, 01:37 AM   #7
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Fat Cat Motorsports has a calculator spreadsheet on their website. You want to look at the front/rear coupling parameter. Go spend some time with it.

Using it, I determined that with my spring rates (9kg front / 6kg rear), putting FM's bar in the front and leaving the stock rear bar in place would return my FRC to what it was stock. The car is very neutral and balanced with the FM front bar and oem rear bar.
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Old 06-16-2012, 09:24 AM   #8
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^ Wow, nice recommendation. I thought it'd be fun to play with... but it might as well have been in Chinese, way over my head.

http://fatcatmotorsports.com/FRC_1_8...MSDS_1_8NA.htm
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Old 06-16-2012, 09:48 AM   #9
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I added the FM bars front and rear to my wife's otherwhise stock 97 and it made the world's difference. I ended up with a little understear, but less than it had to begin with. The FM bars are a steal too.
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Old 06-16-2012, 12:01 PM   #10
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Just be careful with the rear bar. It's easy to make the car very oversteer prone with too much rear bar, which may manifest itself as snap oversteer.

On the street, I've never found a use for anything larger than a stock rear bar, assuming any reasonably sane configuration of springs, dampers, tire and alignment.
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Old 06-16-2012, 12:42 PM   #11
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949 ran racing beat hollow front and stock rear bars at 25h of Thunderhill.
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Old 06-16-2012, 01:01 PM   #12
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Upgraded front, stock rear.
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Old 06-17-2012, 04:03 PM   #13
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Thanks for the input guys!
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Old 06-19-2012, 07:16 AM   #14
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Fm bars!
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Old 06-19-2012, 11:39 AM   #15
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Im running a racing beat solid up front and a MSM rear. Its pretty neutral but obviously a little more tail happy, however it is predictable.

Running MSM suspension all around.

Last edited by Saml01; 06-20-2012 at 05:19 PM.
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Old 06-20-2012, 11:56 AM   #16
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Racing beat race front bar. keep the stock rear bar. When you move up to big boy springs try and get it setup so that you run the stock rear bar in the rain on normal lots with the front bar on hard and then just have to pull an end link on the rear bar for the rain. Or only have to move the front bar to soft when you race on concrete.
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Old 06-20-2012, 03:31 PM   #17
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RB front bar, stock rear bar while on stock springs.

When you upgrade the springs and shocks, I would add more rear spring and dump the rear bar entirely.
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Old 06-21-2012, 02:49 PM   #18
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Quote:
Originally Posted by pdexta View Post
^ Wow, nice recommendation. I thought it'd be fun to play with... but it might as well have been in Chinese, way over my head.

http://fatcatmotorsports.com/FRC_1_8...MSDS_1_8NA.htm
Had the same thought when I first looked at this but decided to look at the numbers for OEM and race setup examples. Tried to compare that to what I was currently at and adjust from there. Mostly concentrated on how the FRC changed based upon sway bar and spring rate adjustments.
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Old 06-22-2012, 08:45 PM   #19
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Right. The FRC is a single number, easy to analyze and compare what you have vs. what you are thinking of doing. Even if one doesn't understand the rest of it knowing how the changes affect the FRC (or that you end up with it being about the same, if that's the goal) is worthwhile.
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