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Old 11-22-2008, 06:29 AM   #1
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Default oversteer faaaaaaack

Just got back from running hwy49 with a few buddies. HOLY HELL does she oversteer

I have fm springs on kyb agx shocks, tried a run on full soft all around, it was like suicide...anything over 20mph in sharp corners was dangerous spin to the point where I barely kept away from the rail.

then went to full stiff (setting 4) on all shocks, seemed to help a bit and the car was way more stable, but still too much oversteer..I was going to go full stiff up front and full soft out back, but someone got pulled over so the whole group headed home. Ill try that next time.

Ever since I threw in the torsen, it is oversteer city for me....fast, slow, off throttle, on throttle is one result = oversteer..


any not too expensive way I can take care of this?
HALP
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Old 11-22-2008, 09:33 AM   #2
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remove rear sway bar?
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Old 11-22-2008, 09:44 AM   #3
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+1 or go bigger up front
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Old 11-22-2008, 11:21 AM   #4
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remove rear sway bar?
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+1 or go bigger up front

compromise: bigger front bar and no rear bar
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Old 11-22-2008, 11:41 AM   #5
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Ditto. I am running stock front and no rear and it is very neutral, for now just remove the rear.
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Old 11-22-2008, 11:52 AM   #6
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compromise: bigger front bar and no rear bar
why, to make a plow for snow season?
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Old 11-22-2008, 12:48 PM   #7
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What are you alignment settings? If anything I would have expected more push once you went to the Torsen. Something isn't right. I've driven an NA with the same suspension setup you have and stock swaybars and it wasn't an oversteering beast.

I'd check to make sure your rear bar isn't binding.
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Old 11-22-2008, 01:04 PM   #8
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What are you alignment settings? If anything I would have expected more push once you went to the Torsen. Something isn't right. I've driven an NA with the same suspension setup you have and stock swaybars and it wasn't an oversteering beast.

I'd check to make sure your rear bar isn't binding.
My **** got tail happy as crap when I installed the torsen...
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Old 11-22-2008, 01:09 PM   #9
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Have you ever checked your alignment? Crazy toe settings can also be attributed to bad oversteer. The FM springs drop the car .5-.75 right? That shouldn't be enough to just outright destroy your previous alignment but you should look at getting it realigned.
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Old 11-22-2008, 01:22 PM   #10
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+1 on checking alignment and removing the rear sway bar.
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Old 11-22-2008, 01:28 PM   #11
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why, to make a plow for snow season?

depending on the spring rate, it's not a bad idea to keep the FRC in check with higher torque levels.
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Old 11-22-2008, 02:57 PM   #12
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depending on your spring rates you may or may not need to pull the rear sway. You can see my setup in my sig. Mine is neutral and snaps right back into place if the rear comes out once I get off the throttle.
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Old 11-22-2008, 03:02 PM   #13
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What sway bars are you using? And to beat the dead horse your alignment settings too! The right balance with the sway bars and alignment settings are huge when it comes to handling.

+1 for Johndoe.

With the stock bars and a similar suspension my car was tail happy too. Even pre-turbo when it had no power! Put the RB hollow up front and it's very neutral with the stock bar in the rear. Some guys remove the rear bar completely as many have suggested. I feel good where mine is so I haven't tried that.

Miata's love a big front bar and next to nothing in the rear.
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Old 11-22-2008, 03:07 PM   #14
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Ha, my car pushes like crazy. It sucks. I gotta do suspensions stuff one day.
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Old 11-22-2008, 03:46 PM   #15
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First suspension mod I did was install FM's sway bars. (the new ones, if it makes a difference)

I've always had them on the middle setting in the front, and the softer setting in the rear.

If it did oversteer with the stock bars, it was uncontrollable past a certain point. now with FM's bars it seems completely controllable no matter how steep the angle of the slide. And I can always stiffen up the front bar one more hole. Its slightly more prone to over rather than understeer, but I like it.

I installed the same AGX, FM spring setup you have later and beyond the stiffness of the ride the handling characteristics didn't change.

oh and check your tire pressures, maybe lower the rear slightly?
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Old 11-22-2008, 03:57 PM   #16
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Miata's love a big front bar and next to nothing in the rear.
I wouldn't consider that a "straight line" at all.
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Old 11-22-2008, 04:08 PM   #17
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Quote:
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depending on the spring rate, it's not a bad idea to keep the FRC in check with higher torque levels.
i just like to add traction before taking it away. plus it costs less to remove the rear than to add a new front sway
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Old 11-22-2008, 04:13 PM   #18
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Yeah removing the rear swaybar is free and does not take long at all, maybe 30 minutes IIRC. It's worth trying. But an alignment check is a good idea regardless.
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Old 11-22-2008, 04:54 PM   #19
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thank you so much for the inputs guys....I have stock sway bars, flyin miata springs on kyb agx shocks.....16" rims with 195's in the front and 205's in the rear (how they came) on some generic *** rubber (figured ill use this up before replacing).....that and the torsen, are my only mods. before the torsen, the car was NOWHERE NEAR as tail happy. I will definitely remove the rear sway just to see if it helps for now, and will be researching more suspension upgrades in the future (maybe go to the rb hollow front yall are talking about and stock rear). The alignment is supposed to be SPOT ON, I had it aligned right after I installed the springs/shocks and that was a couple months ago, still have the papersl (and the 1 year warrantee these guys offer). camber, caster, toe, etc was all set up to have the wheels just like stock (I think -.02 in the front and -.07 in the back for camber, Ill double check) with stock spec caster/toe.....

thanx again for the inputs
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Old 11-23-2008, 01:17 AM   #20
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Nothing to add about the over-steer that hasn't already been written, but you and your buddies should avoid 49 at all costs. It's full of flatlanders and police. Instead, ride up to Auburn and take the road out to Forest Hill. At Forest Hill turn right onto the road towards French Meadows and Hell Hole Reservoirs. From that turn on it's hundreds of turns, dozens of switchbacks, no traffic, and no police; though you've got to keep your eyes open for deer, bears, and the rare Forest Ranger. And the drop into the American and Rubicon River Canyons is hundreds of feet long, but the road is spectacular.
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