Cut OE Springs

Spooler · 03-22-2019, 08:07 PM

I have done it before and I prefer not too. You can have some issues. It does come at a consequence. When you cut a spring, the spring rates do go up. Test it. If you can't afford springs then no way in hell are you going to buy what is needed to get the alignment back to spec.

Jhill · 03-22-2019, 09:15 PM

Quote:

Originally Posted by Spooler

I have done it before and I prefer not too. You can have some issues. It does come at a consequence. When you cut a spring, the spring rates do go up. Test it. If you can't afford springs then no way in hell are you going to buy what is needed to get the alignment back to spec.

I think you meant the rates do not go up, only reduces the amount of stroke before coil bind. You haven’t changed the rate which is the issue, constantly hitting the bump stops sucks.

Spooler · 03-22-2019, 10:17 PM

Quote:

Originally Posted by Jhill

I think you meant the rates do not go up, only reduces the amount of stroke before coil bind. You haven’t changed the rate which is the issue, constantly hitting the bump stops sucks.

Have you ever tested a spring after you cut it?

MaysEffect · 03-24-2019, 11:59 PM

Quote:

Originally Posted by Jhill

I think you meant the rates do not go up, only reduces the amount of stroke before coil bind. You haven’t changed the rate which is the issue, constantly hitting the bump stops sucks.

The spring rate does go up..Adversely the spring LOAD goes down. Thus the huge problem with modifying springs.

nis350 · 03-25-2019, 12:39 AM

I was told that it is perfectly fine to hit the bump stops on the track while turning... I wouldn't know since I don't track.

Quote:

Originally Posted by Jhill

I think you meant the rates do not go up, only reduces the amount of stroke before coil bind. You haven’t changed the rate which is the issue, constantly hitting the bump stops sucks.

CRiZO · 03-22-2019, 10:48 PM

Quote:

Originally Posted by Jhill

You haven’t changed the rate

I understand why you'd think this, but it's incorrect. You're thinking about rigidity of the material. The number of active coils (and in a linear spring, they're almost all active) is considered for spring rate. Remember, spirals are basically a ramp. Cut the spring, and you're shortening the ramp.

Jhill · 03-23-2019, 12:10 AM

Quote:

Originally Posted by CRiZO

I understand why you'd think this, but it's incorrect. You're thinking about rigidity of the material. The number of active coils (and in a linear spring, they're almost all active) is considered for spring rate. Remember, spirals are basically a ramp. Cut the spring, and you're shortening the ramp.

Ah yea that makes sense. I knew fewer coils is stiffer but I thought it had to be fewer coils over the same distance to be stiffer since then your actually changing the pitch of the ramp

Rusty · 03-23-2019, 01:35 AM

Quote:

Originally Posted by Spooler

I have done it before and I prefer not too. You can have some issues. It does come at a consequence. When you cut a spring, the spring rates do go up. Test it. If you can't afford springs then no way in hell are you going to buy what is needed to get the alignment back to spec.

I have cut springs in the past. Only because I couldn't find the springs I needed. And the spring rate does go up.

Tractionless · 03-24-2019, 10:52 AM

Quote:

Originally Posted by Rusty

I have cut springs in the past. Only because I couldn't find the springs I needed. And the spring rate does go up.

Did you do it on the 370Z? If so can we PM to discuss?

That way the ones who are too immature to handle the conversation aren't bothered enough anymore to shame someone they know nothing about, other than posting a simple question.

Rusty · 03-24-2019, 01:56 PM

Quote:

Originally Posted by Tractionless

Did you do it on the 370Z? If so can we PM to discuss?

That way the ones who are too immature to handle the conversation aren't bothered enough anymore to shame someone they know nothing about, other than posting a simple question.

I don't recommend cutting the springs. It's a lot of trial and error. cut, install, take back apart, cut again. Repeat. Once you find the height you want. The ride goes to chit because the springs are too stiff. And if you cut too much. You got to buy new springs. It's not as easy as some make you believe if you want to do it right. Working with a smaller diameter spring as on the Z is not as easy as working a larger diameter spring.

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03-22-2019, 08:07 PM	#1 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,153 Drives: 2013 Nismo 370z Rep Power: 2684394	I have done it before and I prefer not too. You can have some issues. It does come at a consequence. When you cut a spring, the spring rates do go up. Test it. If you can't afford springs then no way in hell are you going to buy what is needed to get the alignment back to spec.