Drop at 30k?

nynhex · 05-10-2011, 01:20 AM

I just bought my 09 370z with 31k mi on it and wanted to drop with a set of Swift springs.

I'm honestly not as familiar with the stock shocks on a 370z as I am with other platforms. So what I'm wondering is should I be able to put the springs on without blowing the shocks or should I get a new/slightly used set of stock shocks to replace what I have?

I'd really like to close up the gaps a bit and make this car's stance a bit more aggressive.

NewlyIMPORTed · 05-10-2011, 01:27 AM

you should be fine.. but if you want to play it safe its never a bad thing

Boost_lee · 05-10-2011, 01:28 AM

I think you'd be fine on the swifts at that mileage.

fuct · 05-10-2011, 10:27 AM

at 31k if you put the springs on dont expect the shocks to last past 50k miles.

kenchan · 05-10-2011, 10:28 AM

at 30K i would definitely get new shocks and struts if running lowering springs.

if you're doing the work in your garage i suppose you can just swap it and see, but it's a a waste of money if you're letting a shop do it. just get new parts (including new adjustable rear toe rods) and be done with it.

Red__Zed · 05-10-2011, 10:40 AM

It really depends on how the car was driven. The shocks could have quite a bit of life left in them, or they could be on the way out.

Econ · 05-10-2011, 11:00 AM

replace them so youre not worrying about it everytime you get in the car

CFZ · 05-10-2011, 01:08 PM

I wouldnt worry about it. Most coilover companies will tell you that the fact "that running stiffer springs on a shock will blow your shock" is a myth.
The only way that a lowering spring will blow your shock is if you constantly bottom out. Stiffer springs wont really affect it. Because even on coilovers whether the shock is valved for a 30kg spring or a 5kg spring the same exact seals are used. The only difference is the way the piston is shimmed. And seeing as though the Swifts gauge the useable stroke of the shock. I wouldnt think it would be a problem.

Well anyways Im just saying I personally dont think its something you have to worry about.

kenchan · 05-10-2011, 02:18 PM

Quote:

Originally Posted by CFZ

Most coilover companies will tell you that the fact "that running stiffer springs on a shock will blow your shock" is a myth.

The only way that a lowering spring will blow your shock is if you constantly bottom out.

Stiffer springs wont really affect it.

The only difference is the way the piston is shimmed.

And seeing as though the Swifts gauge the useable stroke of the shock.

wow...

tjlazer · 05-10-2011, 02:50 PM

You should be fine but if you are paying for the whole install you might be better off buying a new set of shocks... If your doing it free then just do it. Just my 2 cents.

nynhex · 05-10-2011, 02:53 PM

Quote:

Originally Posted by tjlazer

You should be fine but if you are paying for the whole install you might be better off buying a new set of shocks... If your doing it free then just do it. Just my 2 cents.

I'll be doing the swap with a mechanic friend of mine at work. There's a member that has full front/rear suspension off a '11 with 1k mi on it so I'll probably buy that. Ordered my springs today, no one has the Swifts in stock.. Jeez these are popular.

kenchan · 05-10-2011, 07:58 PM

Quote:

Originally Posted by nynhex

I'll be doing the swap with a mechanic friend of mine at work. There's a member that has full front/rear suspension off a '11 with 1k mi on it so I'll probably buy that. Ordered my springs today, no one has the Swifts in stock.. Jeez these are popular.

Sounds like a plan! Get some camber rods too while you're at it. (I made a mistake posting toe rods in my previous post while I was thinking camber rods)

05-10-2011, 01:20 AM	#1 (permalink)
nynhex Base Member Join Date: Apr 2011 Location: Houston Posts: 247 Drives: 370z Rep Power: 371	Drop at 30k? I just bought my 09 370z with 31k mi on it and wanted to drop with a set of Swift springs. I'm honestly not as familiar with the stock shocks on a 370z as I am with other platforms. So what I'm wondering is should I be able to put the springs on without blowing the shocks or should I get a new/slightly used set of stock shocks to replace what I have? I'd really like to close up the gaps a bit and make this car's stance a bit more aggressive.

05-10-2011, 01:27 AM	#2 (permalink)
NewlyIMPORTed A True Z Fanatic Join Date: May 2009 Location: Kennesaw, GA Posts: 1,109 Drives: 11 STI Sedan Rep Power: 18	you should be fine.. but if you want to play it safe its never a bad thing __________________ 2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

05-10-2011, 01:28 AM	#3 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 29	I think you'd be fine on the swifts at that mileage. __________________ My TT Z

05-10-2011, 02:50 PM	#10 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 20	You should be fine but if you are paying for the whole install you might be better off buying a new set of shocks... If your doing it free then just do it. Just my 2 cents. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

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05-10-2011, 10:27 AM	#4 (permalink)
fuct A True Z Fanatic Join Date: May 2009 Location: Sugar Land Posts: 3,692 Drives: 97' Ranger :) Rep Power: 24	at 31k if you put the springs on dont expect the shocks to last past 50k miles.

05-10-2011, 10:28 AM	#5 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	at 30K i would definitely get new shocks and struts if running lowering springs. if you're doing the work in your garage i suppose you can just swap it and see, but it's a a waste of money if you're letting a shop do it. just get new parts (including new adjustable rear toe rods) and be done with it.

05-10-2011, 10:40 AM	#6 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	It really depends on how the car was driven. The shocks could have quite a bit of life left in them, or they could be on the way out.

05-10-2011, 11:00 AM	#7 (permalink)
Econ A True Z Fanatic Join Date: Jan 2011 Location: New York City Posts: 2,546 Drives: Fiat? Rep Power: 19	replace them so youre not worrying about it everytime you get in the car

05-10-2011, 01:08 PM	#8 (permalink)
CFZ Base Member Join Date: Jul 2010 Location: F-Town Posts: 134 Drives: 2010 370Z Rep Power: 234	I wouldnt worry about it. Most coilover companies will tell you that the fact "that running stiffer springs on a shock will blow your shock" is a myth. The only way that a lowering spring will blow your shock is if you constantly bottom out. Stiffer springs wont really affect it. Because even on coilovers whether the shock is valved for a 30kg spring or a 5kg spring the same exact seals are used. The only difference is the way the piston is shimmed. And seeing as though the Swifts gauge the useable stroke of the shock. I wouldnt think it would be a problem. Well anyways Im just saying I personally dont think its something you have to worry about.