miata_racer's turrible STF build thread - Page 3 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #21 of 259 (permalink) Old 01-31-2014, 10:18 AM
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12K = ???

So where is the chart to help those of us still metrically illiterate?

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post #22 of 259 (permalink) Old 01-31-2014, 10:35 AM
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Quote:
Originally Posted by mazda3az View Post
So where is the chart to help those of us still metrically illiterate?
Here's a little chart. 12K = 672 lbs/in


http://ipgparts.com/blog/spring-conv...kgmm-to-lbsin/
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post #23 of 259 (permalink) Old 01-31-2014, 11:11 AM
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Thanks. Also found this:

Quote:
Springs are rated in pounds/inch in the U.S., and Newtons/millimeter elsewhere. I have not seen kilograms/millimeter before, but the conversion will be easy enough.

1 pound = 0.45359237 kilogram
1 inch = 25.4 millimeter
0.45359237/25.4 = 0.0178579673228346

The conversion factor is 0.0178579673228346

So, to convert lb/in to kg/mm you multiply by 0.0179 and to convert kg/mm to lb/in you divide by 0.0179
So my car will be.......... F/R 7/9

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Last edited by mazda3az; 01-31-2014 at 11:12 AM. Reason: Formatting
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post #24 of 259 (permalink) Old 02-01-2014, 03:22 AM Thread Starter
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Coilovers installed
















David Hedderick
08 Mazda 3s Sport - new STF car (sponsored by BC Racing NA and BFG)
2013 MS3
92 Miata - SSM light project
(formerly 2011 STF Mini Cooper)
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post #25 of 259 (permalink) Old 02-01-2014, 10:03 AM
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Question Classing Question

Nice looking stuff.... what size rear springs are those, the 2.5", or larger ID?

Regarding the STF Class rules, you are not allowed to modify, cut, or enlarge the top hole on the strut tower.
Your picture seems to indicate that you may have done so.

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Last edited by mazda3az; 02-01-2014 at 06:32 PM. Reason: Reworded
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post #26 of 259 (permalink) Old 02-01-2014, 07:34 PM Thread Starter
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Ahh...well I"m off to fix that. Good news is I just bent it a bit.


Now to bend it back, remove the adjustment knob and use a regular allen key for adjustment Thanks for catching that Scott. Better now than In September LOL

David Hedderick
08 Mazda 3s Sport - new STF car (sponsored by BC Racing NA and BFG)
2013 MS3
92 Miata - SSM light project
(formerly 2011 STF Mini Cooper)
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post #27 of 259 (permalink) Old 02-01-2014, 08:06 PM Thread Starter
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FIXED!!! So now I need to adjust with a regular 3mm allen wrench. No biggie








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2013 MS3
92 Miata - SSM light project
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post #28 of 259 (permalink) Old 02-01-2014, 08:26 PM
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Nice job, and glad it was only bent. Likely at most local events that your fellow STF competitors would not raise any concerns (depending on how intense they are), but at the larger National events count on it!

Especially if you beat a few of them.

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post #29 of 259 (permalink) Old 02-01-2014, 09:56 PM
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What is that stuff? JB weld?
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post #30 of 259 (permalink) Old 02-01-2014, 10:22 PM
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BCs with Swifts? Didn't see that coming. Was expecting a KW variant.
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