Spring rate help?

Arrvaxx · 08-12-2014, 10:04 AM

Quote:

Originally Posted by wstar

Oops. Yes, I think I copied them backwards. I flipped them around in the top post now.

I'm on Hotchkis sways on both ends, with the rear currently set at its softest setting (because that worked best for rear-end stability on the street tires - but then again I haven't re-evaluated that in a while, and my driving has improved and changed a lot since then. Perhaps the problem was more me than the car

). I've been hearing the ideal is to go to weak or non-existent rear sway and stiffer rear springs instead.

The other suspension components are stock other than SPL's front upper control arms for camber/caster adjust. Front is in the ballpark of -2.5 camber and 7 in whichever is the only reasonable direction on caster, I think. I set it at home with one of those cheap kits, and it's been a while, I should probably go re-measure and adjust sometime. I left the rear alone at stock-ish settings (with the changes from the car lowering ~3/4" or so), so I think it's gotta be around -2 camber there?

I should start writing these things down when I measure them heh, it's been months.

I am not Mr. Track but it seems to me that most people suggest stiff front sway soft rear sway. OR...is that just for autocross?

andy_meng1024 · 08-12-2014, 10:10 AM

Quote:

Originally Posted by Arrvaxx

I am not Mr. Track but it seems to me that most people suggest stiff front sway soft rear sway. OR...is that just for autocross?

His Hotchkis is the most stiff front bar available, but the rear is a bit stiffer than stock tho.

bkleeman · 08-12-2014, 10:21 AM

Get the front as stiff as you can - you probably won't over do it. We're running between 1000 - 1200 lb/in front springs (900-1000 in the rear) with a custom swaybar made from .120 wall roll bar tube and the front still rolls over more than we'd like. See pic:

Hotchkis is the stiffest off-the-shelf bar that I know of tho, so you're left with just upping the spring rates.

clintfocus · 08-12-2014, 11:02 AM

Don't run the rear Hotchkis, way too stiff and most likely contributing to the inside rear tread lift. Go back to stock rear and see how it goes

Shamu · 08-12-2014, 05:56 PM

Quote:

Originally Posted by clintfocus

Don't run the rear Hotchkis, way too stiff and most likely contributing to the inside rear tread lift. Go back to stock rear and see how it goes

Agreed im running stock nismo bar in the rear

Super Werty · 08-12-2014, 10:09 PM

Quote:

Originally Posted by bkleeman

Get the front as stiff as you can - you probably won't over do it. We're running between 1000 - 1200 lb/in front springs (900-1000 in the rear) with a custom swaybar made from .120 wall roll bar tube and the front still rolls over more than we'd like. See pic:

Hotchkis is the stiffest off-the-shelf bar that I know of tho, so you're left with just upping the spring rates.

Who made the sway bar? I wonder if they would sell some.

What end links do you use with this front bar?

Do you guys run a rear sway?

Shamu · 08-13-2014, 12:19 AM

You're 370z isn't 50/50?

I can help you get closer.

bkleeman · 08-14-2014, 01:10 PM

Quote:

Originally Posted by Super Werty

Who made the sway bar? I wonder if they would sell some.

What end links do you use with this front bar?

Do you guys run a rear sway?

The front sway was made by Tim Bell Racing and it's what they run on their Conti cars (GS #21 and #28). I'm sure he'd sell you some - It requires some hardware to properly attach and I think that includes the end-links.

We run a blade-style sway bar on the rear that was fabbed by Doran Racing. Its pretty soft - rates in the 300 lb/in if I recall correctly.

08-12-2014, 11:02 AM	#4 (permalink)
clintfocus Track Member Join Date: Jan 2011 Location: los angeles Age: 39 Posts: 933 Drives: 370z, EK Civic, F150 Rep Power: 16	Don't run the rear Hotchkis, way too stiff and most likely contributing to the inside rear tread lift. Go back to stock rear and see how it goes wstar, DEpointfive0 and synolimit like this.

08-13-2014, 12:19 AM	#7 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 20	You're 370z isn't 50/50? I can help you get closer. __________________ Grant

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
JPY - USD Rate change	diddy535	The Lounge (Off Topic)	7	05-11-2013 11:49 AM
Yes or no? Please rate	xbigb4ller69z	Wheels & Tires	26	03-11-2010 10:53 AM
Rate Your Exhaust	jpit	Intake/Exhaust	22	09-29-2009 08:18 PM
Selling Eibach spring and OEM spring	spia	Parts for sale (Private Classifieds)	8	06-13-2009 08:18 AM