Hstreet -> STF build - Page 2 - Mazda3 Forums : The #1 Mazda 3 Forum
Reply
 
LinkBack Thread Tools
post #11 of 75 (permalink) Old 04-16-2015, 02:27 PM
Grand Am Series
 
Join Date: Dec 2014
Location: Baxley's Speed Shop
Posts: 295
I'll chime in and say that after a month of installing all three mounts I dont notice the vibes too much anymore. Im sure they softened up, but Ive probably also gotten used to them. Its really personal preference. Im sure there is some extra noise and vibes, but its NOTHING like it was when I first installed them. Pass and rear are AWR 80 duro and a Hardrace hardened rubber trans mount.

All 3 are certainly not required. But the rear mount is definitely the weakest in OEM form and Id consider necessary. My pass mount was broken and leaking everywhere, so it made sense.

FWIW, I drive mine around 60 miles per day.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
slow3 is offline  
Sponsored Links
Advertisement
 
post #12 of 75 (permalink) Old 04-16-2015, 02:48 PM
Le Mans: Prototype Class
 
Adam3s's Avatar
 
Join Date: Sep 2009
Location: Illinois
Posts: 1,225
It depends on the driving situation too. Full mounts with stoplight to stoplight traffic with a/c on = whoah baby, holy vibes. All or mostly highway on the other is much different and much more comfortable for the driver and passenger(s).

I never really experience this "break in" thing and my mounts still feel the same and vibrate the car as much as they did 1.5 years ago when I installed them, which is actually kind of reassuring to me.
Adam3s is offline  
post #13 of 75 (permalink) Old 04-16-2015, 03:08 PM
Grand Am Series
 
clemsonmz3's Avatar
 
Join Date: Aug 2010
Location: District of Columbia
Posts: 406
I had the same experience as Charlie where they either settle a little or I got used to them.

Scott brings up a good point, it's not necessary to replace the pass mount by only doing the rear b/c the failure mode of the pass mount is caused by the stock rear allowing too much fore/aft rotation. So I retract part of my previous statement, the pass mount is not a must have, just the rear one.

2006 Titanium Gray Mazda3
#23 STF WDCR SCCA

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
clemsonmz3 is offline  
Sponsored Links
Advertisement
 
post #14 of 75 (permalink) Old 04-16-2015, 03:21 PM
Grand Am Series
 
clemsonmz3's Avatar
 
Join Date: Aug 2010
Location: District of Columbia
Posts: 406
As far as the trans mount is concerned, I replaced mine out of fear of breaking the stock mount after replacing the other two...weakest link theory. I found that it creates a heck of a whine from the trans. Really bad in 4th in my experience. It took some getting used to (okay honestly it took some getting over it...and a header install!!).

I can definitively say tho that you will notice the performance difference the trans mount makes when you race with it and then take it out. I hated the car when I went back to the stock trans mount, couldn't wait to put it back in. To me there is a benefit to doing all 3 performance-wise. When you only got 140-160 crank hp you want to get as much as possible to the ground not wasted into the chassis.

2006 Titanium Gray Mazda3
#23 STF WDCR SCCA

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
clemsonmz3 is offline  
post #15 of 75 (permalink) Old 04-16-2015, 04:00 PM
Le Mans: Prototype Class
 
Adam3s's Avatar
 
Join Date: Sep 2009
Location: Illinois
Posts: 1,225
Quote:
Originally Posted by clemsonmz3 View Post
I can definitively say tho that you will notice the performance difference the trans mount makes when you race with it and then take it out. I hated the car when I went back to the stock trans mount, couldn't wait to put it back in. To me there is a benefit to doing all 3 performance-wise. When you only got 140-160 crank hp you want to get as much as possible to the ground not wasted into the chassis.
Definitely this. The difference in throttle response was immediately apparent when I went from full oem to fully poly. It's quite nice. From a performance perspective doing all 3 mounts is the way to go, no question. Doing just the rear mount is a decent compromise for those that want to balance comfort and performance.

Last edited by Adam3s; 04-16-2015 at 04:05 PM.
Adam3s is offline  
post #16 of 75 (permalink) Old 04-16-2015, 11:52 PM Thread Starter
k3v
Moped Rider
 
Join Date: Apr 2015
Location: IL
Posts: 48
Great info! I'll just start with the rear mount for now.

I ran delrin motor mounts on my ssm car, which led to a lot of issues. Parts literally broke from all the rattling/vibrations.
k3v is offline  
post #17 of 75 (permalink) Old 04-19-2015, 08:14 PM Thread Starter
k3v
Moped Rider
 
Join Date: Apr 2015
Location: IL
Posts: 48
Corksport MS3 Rear Sway Bar Install

In the 4.5 years I've had my 3, all I've ever done were oil changes, a couple belts and an alternator. Last weekend, I looked under the rear of the car for the first time. I'm not a huge fan of the rear end links...oh well.

I bought this Corksport MS3 bar from an AZ autoxer before I moved. The price was right I like the zerk fittings on the sway bar brackets.


I knew the MS3 end links were a larger diameter than the MZ3. I wasn't sure if buying a set of MS3 end links would work, so I went the DIY route. I bought metal sleeve from the hardware store, cut it in half, filed it a bit to reduce the outer diameter, drilled some material out of the inside, and then manually pressed them into the softest sway bar hole (right side).


I had an issue with the end link hitting the lower arm, so I added some washers to the side of the end link that mounts to the arm (see the end link on the left side). It provided enough clearance to make me feel comfortable.


Here's a pic of an attached end link with the spacers visible.


Here are some thoughts, after driving around for a week with the bar:
  • I might put a dab of blue loctite on the endlinks, they keep loosening up.
  • It feels good on the street, but I'll need to add some more sleeves for the other holes if I want to go stiffer.
  • I'm going to either paint or plastidip all the exposed metal on the rear bar.
  • I can't wait to replace the front sway bar bushings </sarcasm> At temps of 30 or below, which seems like half the year in Illinois, my car sounds like a big pile of dung. (My interweb research says the bushings are either mushed or need lubing).
k3v is offline  
post #18 of 75 (permalink) Old 04-19-2015, 08:34 PM Thread Starter
k3v
Moped Rider
 
Join Date: Apr 2015
Location: IL
Posts: 48
I deviated from my original wheel/tire plan. I'm skipping the plan to buy konigs and buying an all season tire for my daily driver 16x6.5" rims.

I'm going to leave the 205/55-16 dunlop zii star specs on my DD rims, and I bought some 16x7.5 sport edition A8 silver wheels with the new Bridgestone RE-71R in a 225/50-16.

Here are a few of the things that led me down this path:
  • Getting my dunlops dismounted and mounted on new wheels, and having the new all seasons mounted on my DD rims is a pain in the ass.
  • Part of my new autox philosophy (for now) is to be able to enjoy my autox car more than just a few days a month. Friends shouldn't let friends commute on crappy tires.
  • I want to drink the Bridgestone kool-aid. Plus they are offering a $70 rebate, twist my arm.
  • I'm bored of black wheels (the only option with the Konigs)
  • Tire Rack > Discount Tire

Camber plates, coil overs, wheels and tires should all arrive this week. I know what I'll be doing next weekend
k3v is offline  
post #19 of 75 (permalink) Old 04-19-2015, 09:23 PM
Grand Am Series
 
mazda3az's Avatar
 
Join Date: Jul 2011
Location: Arizona
Posts: 486
Garage
Kevin, sharing a few things I think I've learned along the STF path:

Replace now the Corksport rear bar sway bar brackets and bushings. Adam found some nice ones. Those CS brackets will break/deform. *I* also found that
the extreme holes on the three position CS rear bar put the links too close to the LCA. So I pretty much used the middle position. I do use the MS3 rear
links, but the CS bar I used to have came with the spacers you fabricated, so, well done.

And, how new is that CS rear bar? Is it an older model?

Scott Meyers
2006 Mazda 3S Sport - Making it the best that it can be

Last edited by mazda3az; 04-19-2015 at 09:57 PM.
mazda3az is offline  
post #20 of 75 (permalink) Old 04-19-2015, 11:26 PM
Le Mans: Prototype Class
 
Adam3s's Avatar
 
Join Date: Sep 2009
Location: Illinois
Posts: 1,225
Quote:
Originally Posted by mazda3az View Post
Kevin, sharing a few things I think I've learned along the STF path:

Replace now the Corksport rear bar sway bar brackets and bushings. Adam found some nice ones. Those CS brackets will break/deform. *I* also found that
the extreme holes on the three position CS rear bar put the links too close to the LCA. So I pretty much used the middle position. I do use the MS3 rear
links, but the CS bar I used to have came with the spacers you fabricated, so, well done.

And, how new is that CS rear bar? Is it an older model?
Corksport now makes Hotchkis knockoffs. Can't say I blame them, if you can't beat'em, join'em lol.



Last edited by Adam3s; 04-19-2015 at 11:48 PM.
Adam3s is offline  
Sponsored Links
Advertisement
 
Reply

  Mazda3 Forums : The #1 Mazda 3 Forum > Technical / Model / Performance > Autocross, Track, and Dyno Results

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mazda3 Forums : The #1 Mazda 3 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



  LinkBacks (?)
LinkBack to this Thread: http://www.mazda3forums.com/90-autocross-track-dyno-results/672609-hstreet-stf-build.html
Posted By For Type Date
Hstreet -> STF build - Mazda3 Forums : The #1 Mazda 3 Forum This thread Refback 05-25-2016 11:57 PM
Autocross, Track, and Dyno Results [Archive] - Mazda3 Forums : The #1 Mazda 3 Forum This thread Refback 09-09-2015 11:25 PM

Similar Threads
Thread Thread Starter Forum Replies Last Post
STF to FSP build Thread Adam3s Autocross, Track, and Dyno Results 836 03-14-2018 06:18 PM
dgross7's STF build thread dgross7 Autocross, Track, and Dyno Results 244 11-10-2017 02:15 PM
slow3's '08 Hatch S STF Build slow3 Autocross, Track, and Dyno Results 276 10-12-2015 11:53 AM
Yes Another STF BUILD Bumblebee043 Autocross, Track, and Dyno Results 16 08-13-2013 01:37 PM
STF Build SpeedTheory Autocross, Track, and Dyno Results 7 05-29-2012 10:35 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
8