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Author Topic: Hotchkis Tuning 350Z/G35 Sway Bar and Spring Data  (Read 506 times)
Sisko99
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« on: June 22, 2008, 02:24:31 PM »

Sway Bars

Specs:

Front:
Outer Diameter: 1 3/8" (35MM) Tubular
Bar Weight: 13.5lbs
4 Position Adjustable

Rear:
Outer Diameter: 15/16"(24mm) Tubular
Bar Weight: 5.5lbs
3 Position Adjustable

Bar Rates:

350Z & 03- 05 G35 Front
Hole 1 = 1525 lbs/in (22% Stiffer than stock)
Hole 2 = 1845 lbs/in (48% Stiffer than stock)
Hole 3 = 2270 lbs/in (82% Stiffer than stock)
Hole 4 = 2855 lbs/in (129% Stiffer than stock)

06 G35 Front
Hole 1 = 1525 lbs/in (5% Softer than stock)
Hole 2 = 1845 lbs/in (15% Stiffer than stock)
Hole 3 = 2270 lbs/in (42% Stiffer than stock)
Hole 4 = 2855 lbs/in (78% Stiffer than stock)

Rear:
Hole 1 = 520 lbs/in (80% Stiffer than stock)
Hole 2 = 655 lbs/in (125% Stiffer than stock)
Hole 3 = 840 lbs/in (185% Stiffer than stock)

*Note: Hole 1 is at the end of the bar. Each progressive hole is further in towards the bar.

Springs:

Front
Drop: 9/16" (15mm)
Rate: 340 lbs/in
Stock Rate: 310lbs/in

Rear
Drop: 3/4" (19mm)
Rate: 330 lbs/in
Stock Rate: 350 lbs/in

*Source: HotchkisTuning.com
« Last Edit: June 22, 2008, 02:40:30 PM by Sisko99 » Logged

Current - 2003 Silverstone 350Z - Performance Trim - 6MT
Retired - 2004.5 Daytona Blue 350Z - Enthusiast Trim - 5AT

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SkullyZ
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« Reply #1 on: July 18, 2010, 10:17:58 AM »

Sisko - What have you found to be ideal settings f/r for track? I'm running 4 on front, 2 on rear - thinking to go to 1 on rear for track...?
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Sisko99
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« Reply #2 on: July 18, 2010, 11:39:05 AM »

Actually....Graham, Bryan S. and myself (at least to my knowledge) all run our sways at max soft front and rear.  I believe, before I started running a square tire setup, I ran 2 hole front and 1 hole rear.  Though now I run 1 hole front, 1 hole rear. 

For the longest time I had my my sways set full stiff and was having a terrible time keeping the back planted in tight turns.  Bryan finally got it through my head that I need to adjust things...well...in adjusting things I made the car want to turn less, so I ended up getting more in depth with it (which is when I posted here: http://www.carolinazclub.com/simpleczc/index.php?topic=500.0). 

Here's part of the e-mail where I'm figuring this out:

Quote
At the AutoX today, I was having an incredibly hard time getting the car to turn sharply....and I know why now. We'll call it a Duh/Lightbulb Moment. Please tell me if this makes sense. When the adjustable sways went on, I set the front bar at 2855 lbs/in (mostly because the instructions said to use the middle hole on a four hole bar...and in a fit of stupidity I went full stiff) and
the rear at 655 lbs/in. Basically I increased the front to 229% of what it was from the factory and the rear to 225% of OEM. Now, a couple weeks ago, I stepped the rear bar back to it's lowest
setting - 520 lbs/in (180% of OEM). Now the bloody thing won't turn for shit. Now this part is remedial...but I'm going to go through it anyway. The 350Z understeers from the factory thanks to
the staggered setup of the wheels. Dunno if you recall the AutoX we went to in Greenville last Novermber, but I put equal width tires (245/45) on and promptly spun my ass around in a circle. Now, I'm thinking that due to the understeer induced by the staggered wheels, Nissan may have dialed a bit of oversteer into the OEM Sways. Now, I took the front and rear and jacked the
rates through the roof and then I went and removed the major source of the understeer....thus creating an oversteer setup. So along comes ZDayZ and I'm kicking the rear end around on my new
again-staggered tires. So in an attempt to calm the back end down, I go and adjust the rear bar down to 520 lbs/in (180% of OEM) and leave the front at 2855 lbs/in (229%). I then go off to AutoX and instantly start going slower. The first event I did on the 12th, I chalked it up to rust and mis-reading the course. But today I'm out there and I'm plowing turns and I can't turn worth a damn. Once I got home I popped onto Google and did some reading....and hence the Duh Moment....found that I'd created an even worse understeer situation than I'd previously had. Talk about shooting myself in the foot (no wonder I'm getting slaughtered out there). So, I'm thinking this: Obviously I need to get rid of this huge pile of understeer I've created for myself and in order to do so, I thought that perhaps I would adjust the front bar down to 1845 lbs/in (148% OEM) and leave the rear at 520% (180% OEM and the lowest possible setting) in order to trim things out a little. I could go down to 1525 lbs/in in the front (122% OEM), but I didn't want to over do it and cause the car to really oversteer.

And here was Mr. Settle's response:

Quote
I told you a long time ago, go full soft on all sways, then move one hole at a time unitl you dial it in where you want it. My swap bars are setup as follows:
 
Front, one away from full soft
Rear, middle.  even with my wide tires that seems to work
 
When I go to R compounds I'll have to return the suspension.
 
You are over torsioning the suspension for the tires that you have.
 
Great breakdown though.  Soften it up.
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Current - 2003 Silverstone 350Z - Performance Trim - 6MT
Retired - 2004.5 Daytona Blue 350Z - Enthusiast Trim - 5AT

One of the greatest quotes of our time....
Quote from: FastColor03
I'm old and easily careen out of control.......
SkullyZ
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« Reply #3 on: July 18, 2010, 11:44:57 AM »

Thanks brother, I'll dial that in for Nashville and see how she goes - makes sense - Around town, it feels pretty good, but then again -i'm just driving the thing two and from work...need some more track time that Aug/Sept/Oct will take care of with the upcoming events  07
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Sisko99
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« Reply #4 on: July 21, 2010, 09:04:00 PM »

Keep in mind that the suspension on your car and mine are somewhat different from the factory...in addition to the fact that I have Koni shocks to go along with the springs and sways.
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Current - 2003 Silverstone 350Z - Performance Trim - 6MT
Retired - 2004.5 Daytona Blue 350Z - Enthusiast Trim - 5AT

One of the greatest quotes of our time....
Quote from: FastColor03
I'm old and easily careen out of control.......
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