Proper ride height for Track

03threefiftyz · 12-24-2013, 07:54 AM

In fairness, you use REALLY short tires and soft springs. Your car never seemed low at static heights.

GSS138 · 12-24-2013, 09:54 AM

Quote:

Originally Posted by 03threefiftyz

That's all fine, but it relies on the same static spring perch height. Any decent shock is going to have a threaded perch for the spring, which you move up. You won't lose any dynamic bump travel, even with a 7" spring. There is a considerable weight savings to be had by using a 7x2.25" spring vs a 9-10" larger diameter spring as well. I want to say the rear was a 5 or 5.5" ID spring in the rear.

So you have coil overs mounted in OEM spring location in the rear? On a coil over I understand, but for that SPL mid link solution I think I might still need a longer spring if I don't use a true coil over.

The shocks I am considering are Koni 2812's or 2816's for the rear. Not sure I have a product selected for the fronts yet.

03threefiftyz · 12-24-2013, 10:26 AM

No. You use threaded perches same as the front, just in the spring bucket.

Ignore the excess anti-seize:

cossie1600 · 12-24-2013, 11:58 AM

Quote:

Originally Posted by synolimit

And they are OEM design? You only posted one damn pic and its super close up of just 2 shocks

haha

Rusty · 12-24-2013, 02:36 PM

Quote:

Originally Posted by GSS138

So you have coil overs mounted in OEM spring location in the rear? On a coil over I understand, but for that SPL mid link solution I think I might still need a longer spring if I don't use a true coil over.

The shocks I am considering are Koni 2812's or 2816's for the rear. Not sure I have a product selected for the fronts yet.

Koni's.....hmmmmmm

http://www.koniracing.com/2812mk2.cfm

You mean 2817?

http://www.koniracing.com/2817.cfm

03threefiftyz · 12-24-2013, 02:59 PM

You would want 2812's for all 4. They package better than remote shocks, but are not cheaper. You will spend $4k once all is said and done for a set. If you go that route, call Jeff Wong at ProParts.

GSS138 · 12-24-2013, 04:45 PM

OK, but then how to build the front? Where do the spring perches go?

GSS138 · 12-24-2013, 04:49 PM

Quote:

Originally Posted by Rusty

Koni's.....hmmmmmm

http://www.koniracing.com/2812mk2.cfm

You mean 2817?

http://www.koniracing.com/2817.cfm

neither: KONI: Racing

number three, just 2812.

wrxrcr · 12-24-2013, 05:05 PM

I went with MCS 2 way non remote. I have ast 4100s on my subaru but i would discourage anybody from buying them. I have been waiting 2 months for a shaft and they still don't know when it will be in. AST parts come from Holland. Products | Motion Control Suspension | Damper and Coilover Systems

ResIpsa · 12-24-2013, 05:46 PM

Quote:

Originally Posted by 03threefiftyz

In fairness, you use REALLY short tires and soft springs. Your car never seemed low at static heights.

And that picture was taken in the braking zone at the bottom of turn 4 while on cold (under inflated) 245/35/18 tires.

Things evened up as they came to temp. Then my master cylinder failed and I crashed into the oil recycling station. But that is another story...

03threefiftyz · 12-24-2013, 07:07 PM

Quote:

Originally Posted by GSS138

OK, but then how to build the front? Where do the spring perches go?

The shock has a threaded body. The perch moves up and down on these threads. You may or may not need helper springs...depends on desired ride height, shock length and spring rate.

Rusty · 12-24-2013, 09:35 PM

Quote:

Originally Posted by GSS138

neither: KONI: Racing

number three, just 2812.

Ok.

synolimit · 12-25-2013, 01:02 AM

Quote:

Originally Posted by 03threefiftyz

That's all fine, but it relies on the same static spring perch height. Any decent shock is going to have a threaded perch for the spring, which you move up. You won't lose any dynamic bump travel, even with a 7" spring. There is a considerable weight savings to be had by using a 7x2.25" spring vs a 9-10" larger diameter spring as well. I want to say the rear was a 5 or 5.5" ID spring in the rear.

Edit: o wait you guys are talking about the rear aren't you?

You talking about the spring height moving with a sleeve around the shock body, or the whole shock body moving for height! I always thought coilovers worked by adjusting the sleeve around the shock body that the spring sits on till I watched the fortune auto video about how to set up their shock and can see the whole shocks spins around the lower mounting holes. This keeps the spring always under tension. I guess in the video they talk about lesser quality coilovers only adjusting height the first way which when lowered to much won't have an tension or preload on the spring and it will flop around till the car has weight on the top hat.

synolimit · 12-25-2013, 01:09 AM

Quote:

Originally Posted by cossie1600

Nice. But damn, Im sad to hear you're unhappy about this! My WRX was a world of difference from the OEM like 220lbs fronts and 190lbs rears to RCE yellow 330lbs all around a koni adjustables. The setup didn't break my back but dear lord did I go from some serious body roll to almost zero!! You're OEM was like 7-8k and now you're over 10k and unhappy. Hope I have better luck with my selection.

Wait, are those FA springs or swifts? Progressive or linear?

cossie1600 · 12-25-2013, 01:14 AM

On the fortune setup, basically the preload is set independently of the height. On some of the lesser coilovers, you set the height and it would change the preload at the same time.

For the 370z, some suspension kits will modify the rear suspension to a point where they would turn the rear shock back to a "strut" type of setup with the spring sitting on a perch in the back instead of the "tub" in the back.

At the end of the day, good shocks are very good expensive. Prepare to custom build them as the 370z doesn't have a lot of options

12-24-2013, 04:45 PM	#52 (permalink)
GSS138 Track Member Join Date: Mar 2013 Location: Mission Viejo, CA Posts: 769 Drives: '12 370Z 6M Sport Rep Power: 14	OK, but then how to build the front? Where do the spring perches go? __________________ Current Mods: Vorpal Weapon +5.

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12-24-2013, 07:54 AM	#46 (permalink)
03threefiftyz Track Member Join Date: Apr 2010 Location: MD Posts: 536 Drives: 03 350z 6mt Rep Power: 17	In fairness, you use REALLY short tires and soft springs. Your car never seemed low at static heights.

12-24-2013, 10:26 AM	#48 (permalink)
03threefiftyz Track Member Join Date: Apr 2010 Location: MD Posts: 536 Drives: 03 350z 6mt Rep Power: 17	No. You use threaded perches same as the front, just in the spring bucket. Ignore the excess anti-seize:

12-24-2013, 02:59 PM	#51 (permalink)
03threefiftyz Track Member Join Date: Apr 2010 Location: MD Posts: 536 Drives: 03 350z 6mt Rep Power: 17	You would want 2812's for all 4. They package better than remote shocks, but are not cheaper. You will spend $4k once all is said and done for a set. If you go that route, call Jeff Wong at ProParts.

12-24-2013, 05:05 PM	#54 (permalink)
wrxrcr Base Member Join Date: Nov 2013 Location: columbus Posts: 74 Drives: 12 370z,09 Wrx Rep Power: 12	I went with MCS 2 way non remote. I have ast 4100s on my subaru but i would discourage anybody from buying them. I have been waiting 2 months for a shaft and they still don't know when it will be in. AST parts come from Holland. Products \| Motion Control Suspension \| Damper and Coilover Systems

12-25-2013, 01:14 AM	#60 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 31	On the fortune setup, basically the preload is set independently of the height. On some of the lesser coilovers, you set the height and it would change the preload at the same time. For the 370z, some suspension kits will modify the rear suspension to a point where they would turn the rear shock back to a "strut" type of setup with the spring sitting on a perch in the back instead of the "tub" in the back. At the end of the day, good shocks are very good expensive. Prepare to custom build them as the 370z doesn't have a lot of options