Alignment...

 

I always think of alignment first, but neg/Turn say bumpsteer, definitely count that in...

Good luck and ...

when you said it feels slippery, it could be a good claying and detail...like mine.

 

I think it's a matter of alignment, but some tires do nibble more than others, and there are just too many variables here to be sure. Alignment is not that expensive, and you need to know the car's alignment settings anyway, so just start with a visit to a good alignment shop.

How much is your car lowered?

 

BTW, anyone who experiences actual bump steer should be aware that it too can be moderated with alignment. Alignment is a powerful tuning tool with cars like the S2000.

 

Agreed with others, get the alignment checked out first and foremost. I dont think it sounds so much like bumpsteer but maybe a bit of tramlining (tires following the "groves" of the road, which can feel like they pull you all over the place sometimes). I believe thats more noticeable when you have bigger tires/wheels. . .I wouldnt know first hand as I've yet to be able to afford anything apart from stock wheels.

 

Thanks to all for the input. I will get an alignment this weekend. If it still doesnt feel right, I'll let ya'll know.

 

I agree on the alignment being out of spec, but also wider tires will tend to follow grooves in the road more so than stock tires. My car certainly does it sometimes on older roads that have indentations from vehicles' tires and if I try to get out of the "ruts", my Hankooks seem to grab at everything.

 

My car was very sensitive over road imperfections; everything was stock for AP2. Got wider tires and went to get an alignment just to find out the front wheels had toe out. After the alignment the car is very stable. It's most unlikely the wider tires. Check your alignment like others have suggested.

 

Maybe I misread his post...but it looked like he said when he was going over uneven pavement or "indentions" and I interpreted that to be a bumpy surface.

Absolutely a slammed car like the OP's, where the roll center has significantly changed, is going to be more sensitive than an ap1 normally is to bump steer and roll steer (which is pretty considerable compared to other cars I've owned) because of the change in dynamic toe characteristics.

And it definitely doesn't take a huge bump to suddenly impact toe on this car...I've felt my car dance with something as small as a large expansion joint when it was lowered 1.5" before installing a BSK! Even at stock ride height, rumble strips at apex points are down right dangerous in this car without a BSK. I'd dare say that is why Krazak and Go Fast Labs put up the money to get TCD to make a BSK for our car.

Any instantaneous change in toe is going to make a car feel jittery regardless if it is one wheel being jounced or two.

 

[QUOTE=negcamber,Mar 15 2008, 12:04 AM]Any instantaneous change in toe is going to make a car feel jittery regardless if it is one wheel being jounced or two.