slow3's '08 Hatch S STF Build - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 277 (permalink) Old 01-02-2015, 04:36 PM Thread Starter
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slow3's '08 Hatch S STF Build

New to the forums. New to the 3. New to Mazdas. Recently picked up a '08 CWP Hatch S . Car has coilovers installed and the exhaust resonator deleted and 95k on the clock. Main purpose is DD duties. But if my "race" car sells, the 3 will get prepped for STF to run mostly local non-SCCA events, but a few trips to Devens will be in order. If I get rid of the other car, it should be easy to justify a STF/slightly uncomfortable daily.

Here she is the day I got her




Ive since deleted the intake silencer and hacked the air box...why not, sounds cool. And stripped the door moulding, 2.3 and 3 badges.

Today I dug into the coilovers to see what Ive got. Unfortunately they appear to be Racelands. The dealer had adjusted them all the way up and the front were preloaded a ton. I took the liberty of removing the wheel gap in the process. Probably went to far, but whatever...they're Racelands Lowered the front around an inch.




The rears were seized. A little heat, big hammer and vice later and lowered the rear a 1/2" or so. One of the rears is missing the top spring isolator. I took the other out for now to match it up with a replacement. May or may not drive it as is.




Final outcome






Future Plans
- Replace motor mounts
- Put good tranny fluid in it
- Get a set of real springs and shocks/coilovers (already have a set of 7"x2.5" 10/12k springs, need shocks to go with them and maybe more spring combos)
- 17x7.5s w/ 215-225 200tw (Im thinking Slipstreams and ZIIs or RS3s; and a set of studs for the stockers)
- Rear camber arms
- Replace cat back (probably Corksport w/ HFC, it currently hits the subframe...uggh)
- Get into some tuning w/ MazdaEdit
- SRI
- pre-06 front grille
- Mazda air dam

Its a fun car. I like it more than I expected I would and it keeps growing on me. Few little issues to take care of. It grinds 2nd if you even think about being aggressive. With the mileage, Im hoping that some mounts and a good fluid change fix it. Needs some rust proofing, I'll POR the undercarriage this spring. Needs some plugs and a good MAF cleaning, maybe this weekend. The suspension setup will be fine for winter duties, but Im sure it'll be far too soft and under dampened for real tires and my driving.

Im really happy to find out they can be made competitive in STF. My current autox car is a stiffly sprung, stripped 380whp Evo in SM. I run our local street tire index w/ 285 ZIIs. Its for sale. Just trying to get the "toy" costs down. There are some suspension bits Id kill for right now in the FS section here. But unfortunately Id be sleeping in the garage indefinitely if I acted on them before selling the Evo.

Anyhow, I'll try to keep this up to date. Thanks for looking


Last edited by slow3; 03-24-2015 at 01:06 PM.
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post #2 of 277 (permalink) Old 01-02-2015, 09:49 PM
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She looks nice. Is it even possible to switch grills? I like the look more of the 2007 to 2009 hatchie. I'm not feeling the look of the grill of my 2006.
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post #3 of 277 (permalink) Old 01-03-2015, 05:37 AM Thread Starter
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Ive read a few posts here that say it should fit. I think as long as the bottom grille bar is part of the bumper on the 04-06, it should work. Apparently all the open mouths require trimming, but the 2 bar and 1 bar grilles don't go down that far...I think...

Ive got a thing for Nuse's semi blacked out 04-06 grille. That plus the mazda air dam will be it for exterior body mods.

Yours CWP? If so, want to trade? lol

Been reading up about these awesome coilovers...ugggh. I was thinking Id run them for a couple events just to slowly get used to the car, but now Im thinking its in my best interest not to put any high stress on these things.
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post #4 of 277 (permalink) Old 01-03-2015, 11:12 AM Thread Starter
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Replaced original plugs today and did a compression test. #s were 167-175 across the board.

Cyl #1's plug was soaked in oil. It appears to be inside the chamber (not a vc gasket?). Anyone know if valve stem seals are problematic at this mileage?

I did get duped into an extended warranty and after a month or so I plan to visit a local Mazda dealer to take care of any issues like this. I'm capable of almost anything, but its worth a 100 deductible not to have to deal with it and especially not have to pay for OE parts. Im going to put a list together and see if I can get the trans looked at too.


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post #5 of 277 (permalink) Old 01-03-2015, 11:41 AM
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http://www.mazda3forums.com/showthread.php?t=644953

Nice car, these will work great for you, those race lands don't look good lol


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post #6 of 277 (permalink) Old 01-03-2015, 12:04 PM Thread Starter
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I know! Ive seen them and I need them. Id have to ship to work and hide them until I sell the Evo! She'd KILL me if a large box showed up right now! haha

I may still keep the racelands for winter duty. Id hate to ruin a nice setup.

You list 550f/500r and 650f/500r. Do you have 8 springs or typo?

And have you found the front bias spring rates to work better than rear bias? My default was going to be ~550f/650r, with an adj rear bar and stock front w/ upgraded endlinks. Can your rears take the extra spring? Im assuming they need to be revalved and cant be adjusted to suit springs like the fronts...That is how the fronts work, right? My only experience has been with rebound only adjustables (FA 510s on the Evo and koni yellows/GCs on my old EG Civic).


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post #7 of 277 (permalink) Old 01-03-2015, 12:14 PM
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Quote:
Originally Posted by slow3 View Post
Ive read a few posts here that say it should fit. I think as long as the bottom grille bar is part of the bumper on the 04-06, it should work. Apparently all the open mouths require trimming, but the 2 bar and 1 bar grilles don't go down that far...I think...

Ive got a thing for Nuse's semi blacked out 04-06 grille. That plus the mazda air dam will be it for exterior body mods.

Yours CWP? If so, want to trade? lol

Been reading up about these awesome coilovers...ugggh. I was thinking Id run them for a couple events just to slowly get used to the car, but now Im thinking its in my best interest not to put any high stress on these things.
What's CWP? I'm down to trade if it fits.
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post #8 of 277 (permalink) Old 01-03-2015, 12:18 PM Thread Starter
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cwp=paint code. actually, I don't think the '06 and earlier was the same color. I'll probably just put up a WTB ad soon and have it painted to match. There is the possibility of a weeny protest at a/x too so I may want my stocker just in case.


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post #9 of 277 (permalink) Old 01-03-2015, 12:30 PM
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Will this help?
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post #10 of 277 (permalink) Old 01-03-2015, 12:49 PM
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Quote:
Originally Posted by slow3 View Post
I know! Ive seen them and I need them. Id have to ship to work and hide them until I sell the Evo! She'd KILL me if a large box showed up right now! haha

I may still keep the racelands for winter duty. Id hate to ruin a nice setup.

You list 550f/500r and 650f/500r. Do you have 8 springs or typo?

And have you found the front bias spring rates to work better than rear bias? My default was going to be ~550f/650r, with an adj rear bar and stock front w/ upgraded endlinks. Can your rears take the extra spring? Im assuming they need to be revalved and cant be adjusted to suit springs like the fronts...That is how the fronts work, right? My only experience has been with rebound only adjustables (FA 510s on the Evo and koni yellows/GCs on my old EG Civic).
It was a typo. I have 650/500. Rear can take the extra spring, I tested 700 in the back. The motion ratio of the rear suspension allows for higher spring rate, up to 800 was fine. I had more front spring because i ran a small front bar and a huge rear bar.


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Last edited by justint5387; 01-03-2015 at 12:59 PM.
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