2016 Build #1- 2012 MS3 for STX nationally - Page 2 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #11 of 24 (permalink) Old 02-10-2016, 12:38 AM
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Are those spring rates necessary? Seems crazy stiff
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post #12 of 24 (permalink) Old 02-15-2016, 10:45 PM Thread Starter
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Might end up going singles since I could get them with a digressive piston...we shall see.

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 #13 of 24 (permalink) Old 02-21-2016, 11:00 AM
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Quote:
Originally Posted by Kenlilley04 View Post
Are those spring rates necessary? Seems crazy stiff
Believe it or not, those spring rates are about right, considering that the MS3 is even more front heavy than a normal MZ3. The rear springs are not far off what is normally run.
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post #14 of 24 (permalink) Old 04-22-2016, 04:52 PM Thread Starter
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Car drives decent on the autocross course. Factory diff still means wheel spin but it's more both wheels now. So it's better. Next comes a custom tune. Purple Drank seems to be confident we can do a good STX tune on it.

Next up will be lower pressures on the Kumhos to try what a friend did out west and made work.

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 #15 of 24 (permalink) Old 07-24-2016, 06:45 PM Thread Starter
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OK...so it's time for a few updates.

So I ended up going to the same ride height all around (raised the front up 1/4") and upping the front rates to 16k (rears still 18k). This made the car ride better overall and gave a less pogo stick feeling over small quick undulations on the road. I may go down on the rear to 16k and see how that does. Overall it's been driving good. As for tires, I still like the Kumho for the price...however, the lower pressures didn't do much for wear. I ruined my fronts in about 30-40 runs (30psi 255 on a 9" wheel). So I'd say give up the 1/2 second and run them at 36 hot and they seem to last ok. Now onto the next adventure...


COTA one day Track Day!!! Yes finally I got to run at COTA with the BMW club. Yes it was fun and hot and VERY taxing on the car. The list of failed parts is as follows:
- both lower ball joints now have 1/2" movement and won't hold an alignment
- destroyed my crappy Hawk DTC-60 pads
- cracked the LF G-Loc G16 compound (awesome pads by the way) pads.
- melted the LF dust boot off the car. Seems like a possible caliper issue.
- Melted the paint on the front wheels and melted the harness for both wheel speed sensors. 1200+ degree rotor temps will do this I guess...time for ducting?
- broke the right side downpipe exhaust hanger off.
- ruined the RF fender liner. apparently the air got behind it and it was dragging.
- popped the LR bumper off the car. the LR tire rubbing on the fender liner will do this since the liner is part of the bumper mounts. trimming and rivets to come. this parachute drops my back straight speed by about 12mph too. I found.


I think that's it. BUT the car was great for what it was. Had some fun keeping pace with brand new GT3 and GT4 Porsches on Hoosiers in the twisty stuff and was only about 6-7sec a lap off them. Not awesome drivers, but not bad...a good above average group I"d guess. Still fun.


Next up is fixing the car. Getting the PD tune on it and trying MSR-Houston in the fall with some of my track time.

Then (optimistically) a back to back with my turbo miata project at MSR-H in the winter.

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 #16 of 24 (permalink) Old 07-25-2016, 05:44 PM
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Damn that's quite a list. I'll shut up about things I have to do on mine.

When you say dust boot, are you referring to the dust boot on the CV? Or maybe on the coilovers?

Wheel speed sensors are what's giving me electrical issues at this point I think (abs and PS) I'm surprised you didn't have any problems.


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post #17 of 24 (permalink) Old 07-30-2016, 10:13 PM Thread Starter
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the dust boots on the pistons on the front brakes. the LF dust boot came off. So I tore the rest of it off this past week. Put new control arms on it and re-aligned it. Fixed the oil leak from the catch can too. Now as for the wheel speed sensors. They are the clip you hae to remove from the front upright when the struts are being changed. The wire that has a bracket on the front sway bar link. That one. Where it clips into the upright melted 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 #18 of 24 (permalink) Old 07-30-2016, 10:15 PM Thread Starter
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Also, the same ball joints that fit the first gen Mazda5 press right into the MS3 front control arms Identical in every way So I have spares for my three mazdas (2008 MZ3, 2009 MZ5 and 2012 MS3).

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 #19 of 24 (permalink) Old 08-04-2016, 02:49 PM
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So they are all the same? Mz3 to ms3 to mz5?

Moog makes some for the speed3...


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post #20 of 24 (permalink) Old 08-04-2016, 08:58 PM
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I bought mevotech ball joints for my 3 earlier in the year, autoparts warehouse had them for like 20$ a peice with free shipping, they have the grease fitting also just like the Moog ones.


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