IW STi Forum banner

21 - 40 of 149 Posts

·
Super Moderator
Joined
·
10,688 Posts
Re: SubySal's '06 STI STU build...

How would the 2015 rack help improve steering response and feel? 15:1 ratio down to a 13:1 ratio steering gear.
 

·
Registered
Joined
·
120 Posts
Re: SubySal's '06 STI STU build...

Great build. I wish I could build my GR to this degree for class. I also have AST's and love them.
 

·
Registered
Joined
·
1,106 Posts
Re: SubySal's '06 STI STU build...

Your photodocumentation is excellent.

The "Some assembly required" shot is classic.
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #25
Re: SubySal's '06 STI STU build...

Thank you all. I know that there's a lot of nice well-documented GD builds out there so I tried to focus my journal on things you don't usually see as well as any snags along the way. This way anyone else attempting a build like this would have a better idea of what to expect.
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #26 (Edited)
Re: Project Silverstreak: The Perfect Build (2006)

Well since I built my STI all at once and it seems to be happy as a clam right now I thought I'd expand my build thread.

I tried snowmobiling for the first time last year and had a blast! When this one came up for sale I figured why not. It came from a friend of a friend. It's a 2004 EFI Mountain Cat with a 159" track. I went through it, fixed a few broken parts, lubed it, and cleaned it up. We went up last Thursday for a shakedown run. It was awesome! We had the whole mountain to ourselves and it was a beautiful Colorado day!











Update 12/9/15: Just did some more work to the sled. Though I completely redid the rear suspension and track system in the spring the front still needed to be addressed. It looked like it had never been lubed so I had to replace all the bushings along with a bent upper A arm. I also noticed whoever repaired or serviced it before put the steering back together incorrectly and left out a part or two. It's now 100% gone through and I even spruced it up a bit with some anodizing and chromex coating!

Before.... (after several cleanings)



After (because things work better when they're shiny!)

 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #27 (Edited)
Re: Project Silverstreak: The Perfect Build (2006)

New battery hold down....

Group 25 Optima's are smaller then conventional group 25 batteries so I was having some problems finding a hold down that fit it properly. I settled on a plastic adjustable type, but it was not sturdy enough. It flexed so the battery would shift while autocrossing. After failing to find a commercial holder that might work better I designed my own exact fit battery hold down and had a friend fabricate it. I know it's just a hold down, but it's the first actual part I've designed from scratch. It works great and holds the battery like a vise!





 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #28 (Edited)
Re: Project Silverstreak: The Perfect Build (2006 STI)

Some pics from the National Tour this weekend. This is the first tour I've entered. I didn't place great, but I did have a lot of fun. I learned the RE71R is amazingly fast in STU compared to my Hankooks so I just ordered a set. Some of the drivers say they feel like R-comps.









 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #29 (Edited)
Bleeding the clutch my way...

Well Sunday night something odd happened. I went to take the STI out for a spin and I couldn't get it into gear with the engine running. I checked for leaks, but everything was dry. When I originally bled the clutch system I used the old pump-it-out method. It seems that I didn't get all the air out. The clutch always seemed to catch right off the floor, but worked fine. I figure two days of autocrossing in hot weather may have shifted the apparent trapped air in the system. I decided trying to bleed it the usual way was a waste of time so I came up with a more innovative method.

I have a Motive power bleeder. I love it! I used it on my brake system and it worked awesome! Instead of trying in futility to "pump" out the air with the brake pedal the Motive bleeder pushes all the air out of the system at one time. The benefit here is air can get permanently trapped in a hydraulic system using the old way. If you have a vertical rise in you lines and your trying to push the air down and out you could have issues. While you're building pressure between opening the bleeder screw trapped air will creep up. So basically you get a yo-yo effect with the trapped air and it may never bleed out. The Power bleeder uses constant pressure. It will keep pushing fluid as long as there is pressure in the bottle. It did a great job on the brake system giving me a pedal like an anvil without so much as starting the car or ever pressing the brake pedal. Needless to say I was sold on that little gadget.

Enter the clutch... I wondered why Motive didn't make an adapter for my clutch. It has a loop in the hard line for Pete's sake! Not to mention plenty of other places for air to get trapped. Since the clutch worked OK using the usual bleed method I just did that and left it. It seemed to work OK until recently.

I decided that since motive didn't make an adapter for my clutch I'd make one. I just bought a new reservoir cap and used the old one for the adapter. All it took was two 3/8" barbed fittings (one in 1/4" NPT the other 3/8" NPT), a foot of vinyl hose (3/8" ID, 1/2" OD), a couple Oetiker clamps, the old cap, and some JB weld.

It worked great! I pushed two full reservoirs out through the bleeder screw. Before the clutch engaged right off the floor. Now it engages about a third the way up. I noticed it was easier to get it into gear too. I haven't taken it for a run yet, but I'm anticipating it will be better than before during shifts. Anyway I just wanted to share this method in case anyone is having issues bleeding their clutch. :)

Here's some pics of my work...





 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #31
Re: Project Silverstreak: The Perfect Build (2006 STI)

The clutch system is so small I didn't fill the Power Bleeder which made clean up very easy. There was none. However it's easy just the same to clean it. If I remember right you just dump out the left over brake fluid then run denatured alcohol through the lines. After that just set it out to dry. Takes about two minutes.
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #32 (Edited)
Re: Project Silverstreak: The Perfect Build (2006 STI)

RE71R's came in today. Hooray!!!

]

I can't wait to get these mounted up!

...maybe it's just me, but the smell of new race rubber has the same effect on me as pure adrenaline or you know 15 cups of coffee back to back!
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #33 (Edited)
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Autocross update:

Well I mounted up the tires last week and tried them for the first time Sunday. They are awesome! The RS3's are good, but these are even better. Very sticky! I managed my best PAX score ever at a summer event. I'm very happy with the result.

I noticed a few things though. They hop when pushed too hard. At the advice of some fellow autocrossers I'm going to try and soften rebound a bit to see if that helps. I also noticed they want more camber then the Rivals or RS3's. I had the car realigned today and set static rear camber to -2.0º and re-zeroed toe. I'll push the front camber up a bit too in an effort to keep the balance the same. Hopefully I'm going in the right direction. I want to get all I can from them.
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #34 (Edited)
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Disclaimer: If you don't even have mild OCD skip this post.

OK so I'm a bit of a perfectionist and I have an affinity for cool hardware... read on.

Company 23 makes all kinds of stuff for Subaru's. From special service tools to innovative little things like studs that replace the bolts that hold on the by-pass valve. This isn't a performance upgrade, but it does make life easier. Anyone that has ever attempted to insert a steel bolt into aluminum threads knows what I mean. Especially when you have the resistance if a large rubber hose pushing against you.

So then Company 23 makes a little stud kit. It comes with two nicely made stainless steel studs and two run of the mill flange nuts. The flange nuts are where my problem starts.

Notice in the pic the locking serrations on the flange. I'm pretty sure that's going to destroy the aluminum housing that makes up the bypass valve when you have to remove it.





So then I found some smooth flange nuts at Ace that seemed to work OK.




Only one problem. Corrosion ...and I hate corrosion! I had to remove the intercooler to bleed the clutch system. One nut came off fine the other took the stud with it. This is what I found.




Well that just won't do so I started looking around for a replacement (preferably stainless) and came across these. Some 12 pt polished stainless nuts from ARP (PN 400-8310) and they worked great! I know it's a small detail, but I think they look cooler too.






Anyway nothing earth shattering, but I just thought I'd share. :)
 

·
Super Moderator
Joined
·
10,688 Posts
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Something, something.......overkill. <snicker>
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #36
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Well overkill is underrated. :D
 

·
Super Moderator
Joined
·
10,688 Posts
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Well overkill is underrated. :D
Honestly if money were no object, I'd have ARP bolts and nuts everywhere on my car.;)
 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #38 (Edited)
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Well I thought I do another update on the tires from Event #7...

As sticky as these tires are I'm glad the car is still staying relatively flat. If we go up to 255's next year I may have to increase the spring rates, but we'll see.

(pics from Event #6)





Anyway tires worked better than event #6. The increased camber really helped a lot. It kept temps down on the tires and they didn't skip. I ended up turning the dampers back up to where they were before though. Softening them made the car too numb for me and the added camber prevented skipping regardless.

I did manage first in class. It's kind of a hollow victory though since our fastest guys weren't running. The important thing was PAX. Up until Event 6 my highest PAX was I think 939. That's pretty respectable for this region as we have many National Champion drivers in fully prepped cars here. Anyway Event 6 brought my PAX up to 957 a considerable improvement. Event 7 my score climbed to 959. This doesn't tell the whole story though. The driver that set PAX at Event 7 is very fast. He Won EP at Nationals in 2013 by 3.6 seconds. At event 7 he set a 17 point gap between first and second place with the driver that got the FTD at Event 6 taking second place. This means all things being equal I would've PAXed out at 976. This would've been my highest PAX index ever. My point being that the alignment made that much of a difference.

Tire wear...

PPIR is hard on tires. Still though these are really getting torn up. At this point they only have 9 runs on them. I'm not sure how long they will last and I may need to swap them soon to even out tire wear. Supposedly they get better wear after the first heat cycle, but with a heavy powerful car like the STI I'm not sure. They also pick up a lot of OPR. More than any other street tire I've used.



 

·
Registered
Joined
·
1,320 Posts
Discussion Starter #39 (Edited)
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

Well I finished the Summer season on the 10th. It was a fun course that favored power. The 700hp 2006 STI quasi group B rally car took the FTD. It was pretty cool to watch.

This one...




I was the only one in STU this event, but I did pretty well on points. 20th out of 143. I didn't get in a full season, so no end of year trophy. Anyway the car is wonderful with the RE71R's. I'm really enjoying them and can't wait for the next time-shattering tire to come down the pike. I feel I have plateaued as a driver though. I'm going to look into some schools to find some speed the old fashioned way... tightening the nut behind the wheel. On the flip side ST seems to be opening up a bit to new mods. The SEB has put forward some interesting new ideas that include wider tires for AWD STU cars. Possibly 255's or 265's. We may also be able to finally switch to aftermarket steering wheels (I've been waiting for this one) and lastly they may allow aftermarket radiators too. Fingers-crossed on the steering wheel allowance.






In the mean time with the season behind me I figured it was time to get the rest of my sled maintenance done. I thought it would be minor stuff.... not so much...




I had already rebuilt the back end replacing all the bearings, hyfax, and a few bogey wheels. I also greased all the pivots. Now it's super smooth. The front needed some work too. I guess in 10 years no one has ever lubed the a-arms. The bushings were shot so I ordered new ones. The sled should work a lot better once I'm done. This kind of stuff is a first for me as I've only had cars and trucks. It's a nice break from the norm though and it's fun learning something new.
 

·
Registered
Joined
·
51 Posts
Re: Project Silverstreak: The Perfect Build (or as near as I can get it)

After reading your responses on the 2017 engine speculation thread, I had to see your Subie. MAN is this thing awesome! You've got an awesome build and I love the details that have gone into this so far.

Subscribed for sure!
 
21 - 40 of 149 Posts
Top