slow3's '08 Hatch S STF Build - Page 3 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #21 of 277 (permalink) Old 02-07-2015, 07:04 AM Thread Starter
Grand Am Series
 
Join Date: Dec 2014
Location: Baxley's Speed Shop
Posts: 295
Finally got set up with MazdaEdit. I went through and touched up a few maps and the car seems to be responding well. Apparently Ive got the 1.6/2.3L ROM ID which is not defined as well as the others, although I have most of what I need. And some testing has uncovered some bad map names, but at least Im figuring out when they are used. The 3' of snow in the last 2 weeks has made WOT logging hard. My laptop comes with me every day I don't have my son in the back and its not snowing.

I haven't talked myself into braving the cold to install the exhaust yet, still "enjoying" the clunk it makes over every bump.

Still on the look out for a Hotchkis rear bar, some decent camber plates and some rear camber arms and I think the suspension will be close to being purchased for this year's set up.


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post #22 of 277 (permalink) Old 02-20-2015, 10:38 AM Thread Starter
Grand Am Series
 
Join Date: Dec 2014
Location: Baxley's Speed Shop
Posts: 295
Said goodbye to my 1st love last week. Guy flew in from VA to drive my Evo back. It was dropped off at an Evo shop in DC on Monday to start the NASA TT build the buyer is planning. <cry> 8 years, ~85k miles, and sold it with close to 400whp and a autocross SM prepped suspension. <cry><cry>

But now I have my garage back. And I can stop hiding packages as they come in for the 3. lol

Fatty Hotchkis rear sway bar received yesterday from miata_racer.

Im seeing big knock spikes in my logs when shifting or going WOT too quickly. Im assuming it is a combo of worn rear and leaky pass motor mounts.

Ordered the following over the weekend:
- AWR Pass motor mount, 80 durometer
- AWR Rear motor mount, 80 durometer
- Hardrace Driver's side motor mount, hardened rubber
- Spin-on oil filter conversion
- Remflex gaskets for the corksport cat back
- Dunlop ZIIs in 225/45R17. These are last year's compound...cause Im a cheap bastard and they were only 101/pc on closeout.

once all the mounts and oil filter stuff comes in, I plan to do my first fluid change on it and install the cat back and mounts.


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Last edited by slow3; 02-20-2015 at 10:40 AM.
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post #23 of 277 (permalink) Old 03-08-2015, 07:10 AM Thread Starter
Grand Am Series
 
Join Date: Dec 2014
Location: Baxley's Speed Shop
Posts: 295
Finally cleaned this thing the other day. Too bad its no where near as nice looking now. I hate winter.

Clean winter mode


The other day on the way home it starting sounding like someone hitting a hammer to the subframe over every single bump or crack in the road. Get home, jack it up and see the shock moving within the mount. Fkn Racelands. Both sides were like this.


So I went ahead and installed the rear (black) shocks and spring/adj. perches from the MS Motorsports coilovers. Rides soooooo much nicer. I think the springs are actually stiffer, but the shocks are so much better that it doesn't matter. Every noise Ive been hearing was the shocks, not the exhaust. Its silent now.


My wife has a friend in town this weekend, so that means I had the green light to plan garage time.

Yesterday started with the passenger side motor mount. The frame rail was covered in oil.


Old pos VS new AWR 80 duro mount


doh!




Then tackled the driver's side. She's buried underneath the battery box.
Old that wasn't too bad really VS new Hardrace hardened rubber mount




Then tackled the rear. Once I figured out to get the damn jack out of there and just let the motor sit, it was easy.

Old soft and mushy VS new AWR 80 duro


I then swapped the oil filter housing for a spin on style and did an oil change. No pics, but Im glad I did it. The cartridge was leaking. Glad to have a normal one anyways. Only problem here was the front clip/nuts on the undertray. What a dumb design, unless what Im seeing isn't oem.

Then tackled the exhaust. This was the only major pain in the ass all day. Only had to cut one section and wasn't hard to get off. But the rear support bracket at the tip was cut off. So after cutting the custom mount off the old muffler, breaking the bolt I wanted to use to mount it, breaking a bit to drill the bolt out, I finally got it mounted up. The fitment is pretty good.

old VS used Corksport w/ test pipe


Only major vibes are between 1k-2k rpm. Not too bad, couple rattles in the rear that are likely due to my exhaust hanger. I didn't expect this big of a change in exhaust note and sound. Very mellow at idle and low load, but its throaty and sounds like an animal under load. CRAZY resonance between 4.5-5k, which Im sure is a mixture of the mounts, intake mod and exhaust. Hard to quantify any gains.

Happy with it. Was really happy to get some known issues fixed before they became worse. All-in-all a good day of wrenching.

Front coilover setup waiting on a good deal on camber plates to pop up. I'll put the rear bar in at the same time and may go ahead and do endlinks all around.

Got some tuning to do now.


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post #24 of 277 (permalink) Old 03-22-2015, 10:31 AM Thread Starter
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Join Date: Dec 2014
Location: Baxley's Speed Shop
Posts: 295
Still trying lots of different stuff with the tune. But Im hating the rareness of my ROM. I obtained a stock tune from a different ROM and its soooo much more defined than mine is. Ive had someone helping me look into it without much success, but I think Im getting close enough. Should be ready for dyno time at my buddies house in a couple weeks. Hoping to have a really good handle on everything before then so Im not chasing my tail on the dyno.


Installed an Eonon GA5151 yesterday. Having a few issues that Im still working through just like everyone else with the unit.

Im excited to get the Torque app working so I can monitor stuff without carrying the laptop around. Ive had the laptop in the car almost daily now and its hard to not try and watch it as well as a pain to carry around. Found that the unit doesn't work with the OpenPort 2.0 via USB, so I ordered up a Bluetooth adapter. I should be able to upload datalogs to the laptop via WiFi and just have to bring it to the car to flash.

GPS seems to work well. Im using the Sygic at the moment and trying a few others out before committing to pay. I cant tether or hotspot my Android phone so I have to get offline maps. Republic Wireless $25 unlimited plan, apparently with features disabled. May be root time...

Havent figured out how to hook up the backup camera yet and now its cold again, so that will wait.


Spent the morning today finishing off the purchases for this season's setup.

Corksport camber plates
SPC rear arms
Whiteline adj. Endlinks F/R
Whiteline front LCA front bushings
Whiteline rear toe bushings
Prothane rear LCA bushings
Energy Suspensions rear trailing arm bushings (Focus)
17x7.5 +45 Rota Slipstreams in Steel Grey

Hoping that's enough to PAX top 5 locally and not get stomped too bad down at NER events.


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post #25 of 277 (permalink) Old 03-24-2015, 10:57 AM Thread Starter
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Location: Baxley's Speed Shop
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17" slips discontinued, so I jumped on the 15" band wagon. Sold the 225/45-17 ZIIs and bought some 225/45-15 RS3v2s. I didnt realize it, but according to tire rack and wheel weights online, Im saving almost 25lbs in just rotating mass! Thats crazy.

Looks like Im keeping my 17x8 Enkei OEM Evo 7 wheels for daily usage. Probably just put some budget 215 or 225s on them. Theres a little life left in the tires installed, so they will get put on soon.

Everything except datalogging is now working well with the head unit. Bluetooth adapter should be here this week and I'll be able to try Torque out.


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post #26 of 277 (permalink) Old 03-24-2015, 02:50 PM
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17" slips discontinued, so I jumped on the 15" band wagon.
You'll be glad you did. Just about everyone on the serious side of STF runs 15's.

Quote:
Originally Posted by slow3 View Post
Sold the 225/45-17 ZIIs and bought some 225/45-15 RS3v2s. I didnt realize it, but according to tire rack and wheel weights online, Im saving almost 25lbs in just rotating mass! Thats crazy.
After you burn through the 225/45/15's you might want to consider a 205/50/15. Most guys competing at a high level in STF aren't running 225's and run a 205/50/15 or a 195/50/15 on a 7.5" wheel. I switched last Fall and I'm definitely a believer now.

Last edited by Adam3s; 03-24-2015 at 03:08 PM.
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post #27 of 277 (permalink) Old 03-24-2015, 03:39 PM Thread Starter
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I ran 205s on my STC Civic with 15x7.5s. I wanted to put ZIIs on the 3 and those are offered in 205, but just felt like they would be tiny on this car. If tire Rack wasnt so quick on shipping, Id change my order. I ordered yesterday and they are probably on my door step today.

Biggest difference is turn in response, right?


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Last edited by slow3; 03-24-2015 at 03:47 PM.
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post #28 of 277 (permalink) Old 03-24-2015, 03:50 PM Thread Starter
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On the topic of turn in response...Any reason I shouldnt get the offset front LCA bushing? I sent Mack a PM to see if his is still available.

My 2 concerns are dulling turn in response too much and making the inner front LCA bushing bind since it articulates it.

thoughts?


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post #29 of 277 (permalink) Old 03-24-2015, 04:01 PM
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I ran 205s on my STC Civic with 15x7.5s. I wanted to put ZIIs on the 3 and those are offered in 205, but just felt like they would be tiny on this car. If tire Rack wasnt so quick on shipping, Id change my order. I ordered yesterday and they are probably on my door step today.

Biggest difference is turn in response, right?
Right, the skinnier tires feel better but seem to have the same level of lateral/longitudinal grip because tire grip is much more affected by rim width rather than tire width. I noticed better results right away after doing nothing else but switching to the narrower tire and the car just plain feels better. I have no actual testing to back that up, but guys way better than me have and they prefer the narrower tire. I think it's an urban myth that a bigger/heavier car needs a wider tire, it actually needs a wider rim but of course we're limited to 7.5." In my experience the 205/50/15 works great on the Mazda3.

Again, much of this is my personal opinion so take it for what it's worth.
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post #30 of 277 (permalink) Old 03-24-2015, 04:06 PM
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On the topic of turn in response...Any reason I shouldnt get the offset front LCA bushing? I sent Mack a PM to see if his is still available.

My 2 concerns are dulling turn in response too much and making the inner front LCA bushing bind since it articulates it.

thoughts?
I passed on the offset front LCA bushing. To me it wasn't worth introducing some bind to the suspension to gain a measly .5 degree of caster. If more caster is desired, I'd slot the upper strut towers. You can gain more caster that way while at the same time not bind up the suspension.
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