I lowered my s2000 after fitting my new 18" wheels (8" front 9"rear) and now the car vibrates when under load. The front dropped 35mm and rear 40mm. Wheel alignment was done and the back had 3 degrees camber. Can anyone suggest why the vibration is occuring and a possible solution to fix it.

 

Your CV's are bad. They were probably already ruined, but when you lower the car, it makes it more obvious. Replace the inner CVs. OR, wait a couple months and see what Raxles comes up with. I sent them my old axles so they can prototype an improved setup that will be stronger and hold up better on lowered S2Ks.

 

depending on the wheels, you may require hubcentric wheel spacers. which springs and wheels did you get?

ask in the tire and wheel forum....

regards.

 

It's not the wheels. Trust me. I speak from first hand experience on this one. RT can confirm. It's the CVs.

 

rev, you may be right - but he said he had an alignment done and therefore i would assume that they would have noticed worn CV's... that's all.

regards.

 

You can't "see" worn cv's. You have to remove the axles from the car and take the cv boots off to "see" the wear.

I'm not saying it might be the CVs. It is.

 

3 degrees? ack! that's quite a bit. I hope you use it.

 

rev, if you're THAT confident in your assessment (via internet no less), i hope you bought a lottery ticket

 

I'm 100% sure. There is a thread in Under the Hood dealing with this exact issue. The CV's get pitted on the inside and cause a vibration that is only present under acceleration because only the side of the cv that is pushed against to accelerate gets the pitting. If something was out of balance, you'd feel it all the time, not just under accel.

The reason he started to notice it after lowering the car is that lowering creates a greater angle on the cv joints, so the rollers on the inside do more side to side traveling and rub back and forth against the pitted areas as they do so. The problem is with the inner cv because that joint allows for a push/pull motion (which is exagerated on a lowered car). The outer joint doesn't allow for push/pull, so that joint isn't a problem. I don't think lowering causes this problem in any way... but it certainly will make it noticable on a car where it may not have been noticable at stock height (as was the case with my car).

 

This is not really related, but will Honda still do the Clutch TSB under warranty of your car is lowered with 18" wheels?

Thanks!