NC Spring Perch Installation

Installations instructions for MonsterFlow intakes, Big Brake Kits, shocks and more.

Re: NC Spring Perch Installation

Postby Auto-x-er » Thu May 30, 2013 11:03 pm

Stock is M12X1.25 I went with a 45 mm bolt since thats what looked best with the options Lowes had.
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Re: NC Spring Perch Installation

Postby morrisg » Thu May 30, 2013 11:45 pm

Auto-x-er wrote:Stock is M12X1.25 I went with a 45 mm bolt since thats what looked best with the options Lowes had.


Might want to spec a grade 8 bolt as well, just for safety's sake.
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Re: NC Spring Perch Installation

Postby skeeler » Fri May 31, 2013 11:26 am

Auto-X-er, thanks for the info.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: NC Spring Perch Installation

Postby Auto-x-er » Mon Jun 03, 2013 4:06 pm

morrisg wrote:Might want to spec a grade 8 bolt as well, just for safety's sake.


I think the grade 8 is probably a bit overkill for the design (M12, 65 ft-lb), but since it is a safety thing I do agree. The problem is where do you find quality grade 8 metric bolts?

As far as my setup I am still having the springs move around a bit. They are on top of helper springs and when the suspension unloads they are shifting around and still rubbing the top of the threads a little bit. Would the swift thrust sheet solve this? If so could that work ok in between the helper spring and the main spring?
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Re: NC Spring Perch Installation

Postby skeeler » Mon Jun 03, 2013 5:52 pm

I think you want what Swift calls a spring stacker, not the thrust sheet. The thrust sheet won't help keep the springs from moving relative to each other. What ID springs are you running?

You've seen Brian Clemons' car, right? He's running 65-mm springs with a stacker. I'm running 70-mm main springs with 65-mm helpers, and I use Fat Cats 70/65 stacker.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: NC Spring Perch Installation

Postby Auto-x-er » Tue Jun 04, 2013 3:06 pm

I am using 2.5" springs with the Fatcat. I have not seen Brian's car, I am far away.

So is this what you are talking about then? http://www.good-win-racing.com/Mazda-Pe ... -0199.html

Getting expensive in parts to make this work.
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Re: NC Spring Perch Installation

Postby skeeler » Tue Jun 04, 2013 3:57 pm

Sorry; I got you confused with someone in Portland.

I think Goodwin's spring reducer is 2.5-2.25 inches; even though he doesn't say so in the description, he mentioned it in one of the forum threads. If your main and helper springs are both 65 mm, then you need something like this or the similar parts made by Hyperco or Eibach:

http://www.frsport.com/Swift-Stacked-Sp ... 4AodVWAA9Q

I don't think Goodwin sells a part like that.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: NC Spring Perch Installation

Postby skeeler » Sun Feb 23, 2014 5:15 pm

Brian,

As I mentioned, I've been using your upper spring perch adapters to run 70-mm straight springs in the rear of my NC. The 70-mm springs give me extra clearance to prevent rubbing the damper. In order to fit the 70-mm springs, I epoxied some carefully chosen hubcentric rings to the OD of the spring seat. Unfortunately, I still get a little rubbing between your adaptor and the damper.

So, would you be willing to offer a set of your adapters designed specifically for 70-mm springs, in other words machined with an OD of ~69.5 mm and and ID that's ~5 mm more than your current model?
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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Re: NC Spring Perch Installation

Postby Brian » Mon Feb 24, 2014 7:18 am

Did you space out the bottom connection per the directions in the production description? Properly installed there is no contact between spring and shock, no rub.
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www.good-win-racing.com
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Re: NC Spring Perch Installation

Postby skeeler » Mon Feb 24, 2014 9:32 am

Brian,

I didn't space out lower damper mount, since I didn't want to compromise the suspension geometry or the support of the lower damper by the upright.
2009, STR & DD. 1995, HPDE. 2004 MSM, sold. 2010 Mazda3, hers.
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