mr. sparco

iTrader: (13)

Did it firm up the ride at least?

Bmurray350z

iTrader: (34)

yeah firmed up the ride, but it is still stupid weird feeling on the interstate..

it feels the same as when I had my drag slicks on... literally the exact same. (like the rear end is floating around)

350Zdj

iTrader: (3)

That sucks.

How where the shocks before you put them on. Did you check for leaks or were you able to push them down by your own weight?

Maybe you wanna try and put back the old shocks back and compare?

ambushphoto

Did you check your rear subframe bushing? My car feels like the rear end is zig zagging when I floor it on the highway and I am 90% sure it is because I can put a finger into the hole in the rubber of my subframe bushing.

Bmurray350z

iTrader: (34)

my old ones were blown stock 04 shocks, and they felt better than this.. these are basically brand new and the guy that had them before me is on this forum and didnt have any of these problems


yeah all of the bushings look fine, at least to me.. but im not bushing expert either lol

Bmurray350z

iTrader: (34)

I have 2 different sets of tires on the F&R.. does anyone know if the difference in tread patterns would have anything to do with it? I've been reading some other threads and some people were saying different tread patterns can cause weird handling characteristics...

Here is my front tires



and here are my rear tires

ericjackson

iTrader: (2)

are you sure your rear wheel bearings are good?\ and axle nut is tight

Bmurray350z

iTrader: (34)

^ Yes to both..

Yesterday got the car to around 80mph just trying to see how it reacts and under hard braking from 80mph, it takes constant counter steering to not lose control of the car.. i took up 2 lanes slowing the car down. Does that point to anything?

ericjackson

iTrader: (2)

a lot of your symptoms were the same as mine. but mine was the wheel bearing/axle nut was loose.

SR71

iTrader: (1)

Could also be this, do the y have the same speed rating, load rating the same too? Hows the stretch on front and rears, more on one than the other? Stiff front sidewalls and soft rears would definitely feel like drag slicks on the back. Are they both directional treads?

Bmurray350z

iTrader: (34)

Delinte D7
Speed Rating: W
Load Index: 97
UTQG: 320AA

Mayrun Mr500
Speed Rating: Y
Load Index: 100
UTQG: 320AA

That's all i could find listed for the specs on the tires

SR71

iTrader: (1)

Id try and borrow a set of wheels/tires from another Z owner and take it for a drive, see how that works.

lovie_350z

iTrader: (2)

Last time my car felt like this was when I put new rear tires on. Took it back to the tire shop and explained to them how the car felt around 60mph & higher. They rebalanced the tires & solved my problem.

stuartc323

I didnt know you had different tires on the front and back. The tread pattern and sidewall stability of those tire sets could be completely different and can cause problems with squirrelyness on the freeway

Bmurray350z

iTrader: (34)

I'm going to try my friend's stock z wheels with michelins on tomorrow, and see if anything changes..

mr. sparco

iTrader: (13)

I guess your car Mayrun on those tires or is it too Delinte now? Did the swap fix the issue?

Bmurray350z

iTrader: (34)

lol. didnt get a chance to swap yesterday, hopefully doing it this afternoon

SR71

iTrader: (1)

Well???? Any update?

Bmurray350z

iTrader: (34)

my lazy *** never got around to swapping wheels... and now im on vacation for a week and dont have the z.. so it will have to wait until next week. lol. sorry, but i will def update as soon as i try that.

ambushphoto

Yes I am interested as well, I installed coilovers w/ camber arms and toe bolts last week and I am getting the same unstable floating feeling, like my car is just riding on springs and no shocks, but I had the rear subframe bushing problem as I mentioned before.

I am no expert on suspension geometry but would having different ride heights on each wheel cause this? I had a heck of a time adjusting my ride height, especially on the rear. Could barely get the fenders off the rear tires even at maximum height on the springs, and I am wondering if maybe I didn't match up ride heights on them properly. It would kinda be like a chair with one leg shorter, no?

I haven't gone for an alignment yet, so I'm hoping that helps out a bit too.