I haven't driven the car since last week, so nothing has changed right now. I will check again this weekend once I've driven it a little more and post the final results then.

 

Can anyone talk about the quality of Tanabe Springs? say... vs Eibach or something to that effect.

Do we know much about this company?

Thanks.

 

Tanabe is a VERY reputable Japanese manufacturer and their manufacturing process on their springs are as good as anyone's. I wouldn't worry about quality with them. The main thing you have to consider is that their springs are progressive rate and not linear like some of the others (i.e Eibach), so you have to decide if this is what you want or not.

 

K thanks =)

Cant wait to hear your reviews on the springs after youve driven on them more.

How much are those springs again?

Also, what made you choose tanabe over the other brands?

 

What's the difference? Also, would the IMPUL springs be progressive or linear?

 

I think these run about $225 through Rick at Riverside Infiniti, if he still has some left.

I went with these because I wanted a more mild drop than the other spring manufacturer's offer (i.e. ~ 1.0").

 

Eibach Prokit's are progressive rate springs.

boss81, the best way to describe it is as follows:
progressive, soft at first then progressively stiffens up as more load is expressed onto the springs
linear, it's consistently soft or stiff from the get go.

 

Thanks, I think the IMPULs are progressive.

 

That's odd, because when I talked to the guy at Eibach a few weeks ago he told me that their springs for th G sedan and coupe had linear spring rates not progressive. He woouldn't give me the actual rates, though, as he said tey are proprietary. Are you certain that the Eibach's are progressive? If so, then the guy at Eibach was wrong, which wouldn't necessarily surprise me one bit. I'll also mention that the Eibach Prokit springs I had on my M3 were definitely linear... It's actually pretty easy to tell if a spring is linear or progressive just by looking at it. The linear rate springs will have evenly spaced coils, like our stock springs, and a prgressive rate springs will have coils that are closer together at one end than the other end. Here's a pic showing the stock linear rate springs next to the Tanabe NF210 progressive rate springs.

 

Hey Will... The explenation soundmike provided is spot on... I will say this, thouh.. progressive springs are suppose to (marketed) be the best ofboth worlds by giving you a decent ride quality over small bumps and also better handling and less lean by getting progressively stiffer as th cornering loads increase on the outside corner of the car. Like I said before, I;ve never had pogressive rate springs on a car before, so I wasn't sure what to expect, but so far, I don't think I like the ride... it's just a little too soft and "bouncy" for me under normal conditions... I'm just hoping that I need to get used to it.

I'm not sure if the IMPUL's are progressive or linear. Did you happen to see them before you got them installed on your car? If so, were the coils evenly spaced or not? It's pretty obvious when a spring is progressive.. see the picture above.

 

I was wrong then, the coils were evenly spaced so they're linear. I got the words mixrd up, the ride isn't bouncy at all. Thanks for all the help guys.

 

Thanks, Calsonic, guess the guy at Eibach gave me the wrong information then... I may stop in there again tomorrow and see if they can show me the springs, since they are only about 5 miles from me.

Just curious, but do you happen to have any pics of your Eibach's springs before they were installed?

 

Now I want Impuls... but with a sightly lower drop and at a LOT lower price.

 

Impuls are progressive.
I checked.

 

Can someone confirm which springs are linear and which are progressive?
I would love to know.

I dont want my ride to be so stiff.