I don't think there is anything you can do about caster, but toe can be fixed. Usually when a car is lowered, you'll get more toe (tires point inwards). Take your car to an alignment shop and they should be able to put it back into spec.

 

I'm finally going to put the coupe sport suspension on tommorow, any tips from anyone who has gone the job themself.

 

I just want to be sure that I have a good enough setup to drive on the streets without no worries. Can one of you please help me out.

I have a 03 Sedan and I just got a set of 03 350Z springs and shocks from a friend. I have already switched out the fronts and it looks pretty even with the rears to a point that I dont even know if I want to lower the rears with the 350Z setup. What do you guys think about that? Do you think it would be ok if I just changed out the rear shocks to the 350Z shocks and leave the stock sedan springs in there?

Also, you say that the 04.5 350Z has a higher spring rate in the rear. Is that what I should have for a sedan rather then the 03 rears that I have now? Front spring rates are the same no matter the year correct? I am assuming that the shocks are all the same since I have not read anything about that being different.

 

I had both the 03-04 and the 04.5-05. From the differents that I saw was that it had purple dot and the 03-04 and a white dot on the 04.5-05. Both springs also have two red dots. So there is a total of 3 dots on each spring with the one dot that sits alone being different.

 

so does anyone one know a if there is a differents in the shocks on the 03-04 and the 04.5-05.

 

oem 2003/2003 and oem 2004.5+ Z shocks are very VERY different and can be specifically I.D. by part numbers. I keep a list of part numbers on hand to help buyers avoid buying unrevised 03/04 Z shocks.

I have a set of unrevised Z shocks that I recently reinstalled so I could remind myself what the ride and drive quality is like anew. Omg, I forgot how much they make the car bounce and porpose, I'm so glad they're off the car now.

 

So what your saying is that I should change my shocks from the 03 to the 05 and the car will bounce less. Also same with the springs, correct?

One last question is about the front, any differents on the springs and shocks.

I have a set of both and am looking for the best ride out of the two.

Thanks

 

Absolutely, pull the shocks off and replace them with 05 shocks, front and rear. The absolute best thing you can do would actually be to invest in Tokico D-spec shocks. But, oem Z revised shocks will certainly be better then the shocks your running now. The D-specs are worth their price however.

I could find no differance between the front springs from either 03 car's or 04.5 cars. Rear springs were a different matter, 342lbs for the 03/04 car's and 427lbs for 04.5+ cars, that's a 24% increase.

 

is this worth doing it?
looks like a lot of work
i'd rather go w/ aftermarket :/

 

Ok, last question. Sorry. So you are saying that I should change from my 03 350Z setup to a 05 setup. Cause I have the springs and shocks from both years. I will get less bounce with the new revised 05 setup. Fronts springs you say are the same but what about the shocks?

 

Not saying you shouldn't go with aftermarket..
But what is your reason??

Most of us are going this route for a MILD sedan drop.
1" for Z springs
0.5" for coupe springs.

Other aftermarkets have a larger drop.

 

Again, 03 oem Z shocks are totally different compaired to 05 oem Z shocks, they can be I.D. via very specific part numbers on the shocks themselves.
Based on what your after, I would run the 03 springs with the 05 shocks. Resell the 05 springs. I have run the revised 05 shock on both rear springs and I felt that the lower spring rate was better for overall shock behavior.

The 05 shocks have less compression dampning vs the 03 shocks, so they will feel less stiff compaired to the 03 shocks. However, rebound control as in bounce and freeway porposing control is night and day better on the 05 shocks.

 

I have an '03 sedan with sport suspension. I can get a set of '04 coupe springs. Is there a benefit in swapping the coupe springs on? Is there still a .5 drop?

Should I get replacement struts for a coupe if I put the coupe springs on?

I thought I read that the '03-'04 sedan sport springs were the same as the '04 coupe.

 

The coupe springs will lower the front by .6" and the rear by over .8". This was measured on my 03 G35 sedan with the sports suspension. I currently have 350Z springs in the front and the coupe springs in the rear. I went with the Z springs in the front because I wanted more of a drop (additional .5").