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Riddle of the ride height and the devil's wheel gap.

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Old 11-11-2010, 04:42 PM
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Neimad
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Default Riddle of the ride height and the devil's wheel gap.

Breaking my vow of never posting for this one. Car and myself went through a few mid-life/indentity crisisis this year and I have an unattractive mess on my hands.

So...

S-tune suspension
+
275/40/17 X 4
=

Livable front/ jacked up (literally) rear.

I can't figure out why its that high and the math is giving me headaches.

Its sitting pretty much at stock ride height 26.4/27.5 (spec is 26.81/27.56).
The tires are 25.7 overall diameter uninstalled 25.ish on the wheels.
Stock tires are 25.9/26.3 uninstalled; not sure about mounted.

At this point I'm probably going to get SLP mid-links+camber arms/swift springs matched to the front rate and drive it till tax time and then finish with __?___ coil-overs and the rest of the SLP goodness.

Any insights/temporary solutions/commiseration/flaming/joking/etc is welcome.
Attached Thumbnails Riddle of the ride height and the devil's wheel gap.-ride-he.jpg   Riddle of the ride height and the devil's wheel gap.-ride-height.jpg  
Old 11-11-2010, 05:11 PM
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derekinthez
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Looks like a truck my friend!
Old 11-11-2010, 05:14 PM
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jduet
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good lord, put some superswampers on that bish
Old 11-11-2010, 05:18 PM
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GeauxLadyZ
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It is an optical illusion because your tires are same diameter all around. Its filling more than stock gap in the front, and less than normal/stock in rear. It just appears higher in the rear.

Springmount mod for temp fix of the rear. take 1/2 to 3/4" off the mount. Dont waste money on swift springs and just wait for coils.

Change front tires to smaller diameter for perm fix after coils.
Old 11-11-2010, 05:45 PM
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fakejojo
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Wow!

First post in almost 7 years!

Hahah, this is great!
Old 11-11-2010, 06:01 PM
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davidv
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I also ran the numbers, and like you, the numbers and the photos do not match. The rear springs are properly installed? The spring-seat is correct?
Old 11-11-2010, 06:18 PM
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Neimad
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Thanks David,

I threw a friends shop a bone for the install. I'll pull it apart tomorrow.
Old 11-11-2010, 06:21 PM
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FATPUBUS
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wow, what happened lol
Old 11-11-2010, 06:31 PM
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davidv
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Originally Posted by Neimad
Thanks David,

I threw a friends shop a bone for the install. I'll pull it apart tomorrow.


ha ha...

Members have a habit of installing this progressive spring upside-down.
Old 11-11-2010, 06:44 PM
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Neimad
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I checked spring orientation today. I think Nismo means something in Spanish so that probably helped.
Old 11-11-2010, 08:05 PM
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GeauxLadyZ
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Oo I missed the part about u being on stune. So was that it? Are they upside down?
Old 11-11-2010, 08:09 PM
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johnwigs
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17s... that is the optical illusion
Old 11-11-2010, 08:29 PM
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Steve-O Z33
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Originally Posted by Neimad
I checked spring orientation today. I think Nismo means something in Spanish so that probably helped.
Yeah, someone told me once that nismo in Spanish means, "the same."
Old 11-11-2010, 11:43 PM
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terrasmak
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Throw 275/40-18's on the rear and the illusion will go away. It will also handle real well.
Old 11-12-2010, 07:40 AM
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betamotorsports
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A couple times at Cal Speedway and WSIR I had 350Z guys come by and tell me my car was sitting too high and that I needed to lower it to make it handle better.



They still said the same thing after I ran laps 6 to 9 seconds faster then them and their lowered cars. BTW... in that picture the car is running 285/30-18s all around on stock springs.
Old 11-12-2010, 08:12 AM
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Neimad
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There's autocross at the Coliseum this Sunday. If nothings wrong with the springs I'm going.
Old 11-12-2010, 03:35 PM
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Neimad
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Took driver's side apart, no 1" block of wood under spring like I was hoping.

Almost cut the mounts but didn't have a precise way of doing it. Also it seems ghetto.

Can someone measure a stock 17" with 235/50 overall diameter for me?

This is so I can compare what my theoretical S-tune+stock wheel tire gap is to pictures of other S-tune/stock gaps.
Old 11-12-2010, 04:21 PM
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terrasmak
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http://www.1010tires.com/TireSizeCal...?action=submit here you go
Old 11-12-2010, 04:39 PM
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Neimad
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That's uninstalled/no weight on it. The 275/40/17s I have are listed at 25.7 total diameter. On the car they are just over 25. So the stock tires are 26.3; I'm assuming they compress similar to about 25.7...so I gain .6ish wheel gap. Right now it does need gas but I measure at:
Front 26.25 with 1.5 gap.
Rear 27.75 with 2.75 gap.

The ride height does not make sense. It should be -.8 from the springs and -.35 from the sidewall reduction.
Old 11-12-2010, 08:41 PM
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BrazenZ
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When I swapped from my 255/35/19's front, 285/35/19's rear to 255/40/17 all around (Before I dropped it and had it realigned) I looked liked I was driving a 4-wheel drive 3/4 ton Z.

Last edited by BrazenZ; 11-13-2010 at 01:26 AM.


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