|
|
|
|
Thread Tools | Display Modes |
11-02-2011, 12:31 PM | #1 |
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Tyler's 2005 Boppity Bopp STi ASP Build
This is my winter build and I'm sure it will be an ongoing build. I should have started a thread a long time ago. I'd like to get some input on the direction my build is going.
Sponsors for the build: TiC TRU Motorsports Fort Wayne Subaru Here is the specs of the car right now: 2005 Subaru STi Engine: JDM TGV Deletes Perrin Turbo Inlet K&N Typhoon Intake 3 Port Boost Solenoid Deatchwerks 850cc Injectors E85 Tune GTSpec Header & Uppipe Cobb DP Ansa Cat Back Megan Racing Motor Mounts Megan Racing Trans Mount Megan Racing Pitchstop Lightweight Battery Suspension: TiC AST Coilovers (8k/7k) Vorshlag Rear Camber Plates PDE Front Camber Plates 32mm Niles Front Sway 29mm Whiteline Rear Sway Outrigger bushings (TiC) Shifter bushings (Perrin) Wheels: 17x9 5zgen FNOR-1C w/ 265 Star Specs Brakes: Hawk HP+ Interior: RS Driver's Seat Defi Boost Gauge AEM UEGO Winter project: 8mm Phenolic Spacers Intake Manifold Port by TiC Throttle Body Port by TiC New Tie Rod Ends (front) New Ball Joints (front) New Wheel Bearings (all four) 285 / 30 / 18 Hoosiers Golan Fuel Filter PURE Tune Corner Balancing Heavier Swift springs Damper revalve Karlton fender flares Lateral link bushings (TiC) Trailing arm bushings (TiC) Front control arm bushings (Whiteline) Rear control arm bushings (TiC) MSI Housings Steering rack bushings (Whiteline) Deathscwerks 1000cc injectors I am going to nationals next year for ASP so I am looking at ways I can mod more to be competitive.
* Registered users of the site do not see these ads.
Last edited by ScoobyAddict14; 02-18-2012 at 05:34 PM. |
11-02-2011, 03:15 PM | #2 |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
The list of things to do is pretty much what I was going to suggest for it to be even close to ASP competitive. Spring rates are in the ballpark at least and the tires are good. 18x10 +35 would be just about right as well, although I'm sure TiC will let you know.
Off topic, but is that pic from an OVR event at OSU? |
11-02-2011, 04:07 PM | #3 |
Scooby Specialist
Member#: 197920
Join Date: Dec 2008
Chapter/Region:
MWSOC
Location: Indiana
Vehicle:2005 Legacy GT ABP |
Nah I believe that's the Subaru Challenge at SIA this past August. Great lookin build T. Hopefully I can make it to some Ft wayne events next year and see how it runs.
|
11-02-2011, 08:28 PM | #4 |
Scooby Specialist
Member#: 48377
Join Date: Nov 2003
Chapter/Region:
MWSOC
Location: "They eat fish soaked in lye"
Vehicle:1996 Gutted, built XP class Impreza L |
It looks to me that you are too stiff on swaybars and too soft on springs. I'd go to 12k/11K springs with those bars turned down a notch.
What is your alignment? Alignment is often the cheapest, most overlooked suspension tuning tool available. |
11-03-2011, 07:30 AM | #5 | |
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Quote:
|
|
11-03-2011, 09:47 AM | #6 |
Scooby Newbie
Member#: 98850
Join Date: Oct 2005
|
lightweight seats?
|
11-03-2011, 09:48 AM | #7 |
*** Banned ***
Member#: 296742
Join Date: Oct 2011
Chapter/Region:
NESIC
Location: RI
Vehicle:'16 STI, '11 WRX, '96 328i DSP |
Nice car, nice build!
One question, and I apologize for my ignorance, I thought the STI was in BSP? |
11-03-2011, 09:57 AM | #8 | |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
Quote:
I agree with SpeedyHam, you'll end up fighting the bars a decent bit, and I'd add in a good rear diff as well for a more complete package. |
|
11-03-2011, 09:58 AM | #9 |
Scooby Newbie
Member#: 291745
Join Date: Aug 2011
Location: St. Louis
Vehicle:2016 WRX White |
They're creating a SSP class and doing some redistribution of the classes. New ASP = old BSP essentially.
November Fastrack has the break down for what they're changing: http://www.scca.com:8090/assets/11-fastrack-nov.pdf |
11-03-2011, 11:56 AM | #10 |
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Throwing in the RS seats which are significantly lighter than the STi seats
What suggestions do you have for the rear diff? |
11-03-2011, 12:01 PM | #11 |
Scooby Specialist
Member#: 179170
Join Date: May 2008
Chapter/Region:
South East
Location: Behind the wheel
Vehicle:2005 |
+1 on the rear diff or this will be the death of you.
|
11-03-2011, 03:25 PM | #12 |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
The Cusco RS is always a popular option. I have a Carbonetics that I got on closeout. It basically requires fluid changes every 3k miles for hard use so not something I would suggest for a heavily used daily driver. For me though I usually change the fluid 2-3 times a year and absolutely love the diff. Smooth with great progression in locking.
The Cusco is spring loaded so you have to put a certain amount of torque through it before it starts locking. This is to prevent popping in low speed parking lot type turns. Only downside I've ever heard of that is it can occasionally lock more suddenly as you overcome the springs. If OS Giken made a diff for our cars I'd be interested in that, but the Carbonetics is as close as I could find at the time (2-3 years ago). And like I said, the only reason I have one is a shop was closing and they were selling the last few parts they had. IIRC the diff was like $1,600 new or something and I got it for $800 with enough fluid to last till now. I was going to buy the Cusco since it went for roughly $1k. Still, long story short, you want the diff first as it will dictate your suspension setup. If you setup everything else first, then do the diff you'll find that you have to go back and change a lot of things to bring it back to "just right". |
11-04-2011, 10:27 AM | #13 |
Former Vendor
Member#: 93646
Join Date: Aug 2005
Chapter/Region:
MWSOC
Vehicle:Many Track Records Let us help you go fast! |
We picked up a Guard rear unit for the race car from Matt Monson (here on the boards).
At first we were rather apprehensive given the price and the cusco unit we had in the past seemed to do ok. Oh, man, the price is worth it. So very happy with that diff. |
11-04-2011, 10:46 AM | #14 |
Scooby Specialist
Member#: 188079
Join Date: Aug 2008
Chapter/Region:
South East
Location: Brunswick, GA
Vehicle:2003 Stg 2 Bug Wagon Sonic Yellow |
Not from personal experience, but I do a lot of reading and talking with people on different suspension ideas/theories/ etc. A guy in SC races an RS and is going through the process now of redoing the suspension after upgrading his rear diff to a Cusco.
At first, he was fighting to get the car to rotate while keeping the car level to minimize rear tire lift. Now that he has a proper diff that can distribute the power as needed, and let the drivetrain help rotate the car, not jack up the weight transfer through bars and/or springs, he is going to try a wagon rear bar or none at all. Good luck. Also, what are the current SP rules on a splitter? I would think there is some aero work that could be done, as IIRC have seen some of the CSP cars and such with splitters and I know huge rear spoilers. Travis |
11-04-2011, 11:37 AM | #15 | |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
Quote:
|
|
11-04-2011, 11:52 AM | #16 | |
Scooby Specialist
Member#: 188079
Join Date: Aug 2008
Chapter/Region:
South East
Location: Brunswick, GA
Vehicle:2003 Stg 2 Bug Wagon Sonic Yellow |
Quote:
He mentioned that when he was running a 22/24 bar, that he could hear the rear end clunking when the car would hike the inside tire, and then drop back down, and hear the rear diff clunk from the sudden load as it was basically weak enough that it was very close to an open diff. I have had this personally happen a lot as I am still on stock bars, and stock diffs. Travis |
|
11-04-2011, 10:42 PM | #17 | |||
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Quote:
Quote:
Quote:
Working on more of the teardown tomorrow! |
|||
11-05-2011, 02:20 PM | #18 |
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
I have everything off the car except for the two inner rear lateral links. I need to get 6 point combo wrenches to get them off.
Could someone please explain the need for a new/better diff? |
11-06-2011, 11:03 AM | #19 |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
The factory diff(s) becomes open when one rear wheel is lifted off the ground and all the power goes to that hanging wheel. The car will slow down till the hanging wheel (that's now spinning pretty fast) comes back to earth and jolts the rest of the car. If you search you'll see there's a lot of other autox drivers who have the same problem. They call it "bouncing out of corners". The wheel lift is very common, especially with big bars. With a proper clutch pack diff you can still put the power down to the other three wheels and mitigate the bouncing.
|
11-06-2011, 02:40 PM | #20 |
Scooby Specialist
Member#: 179170
Join Date: May 2008
Chapter/Region:
South East
Location: Behind the wheel
Vehicle:2005 |
Subydude is right on. Potentially you could have this wheelspin/loss of power to the ground on almost every corner exit.
Say you loose .05 secs per corner exit from wheelspin X 10+ corner exits that .5secs you lost. This could be on the extreme side but just an idea. |
11-06-2011, 03:57 PM | #21 | |
Scooby Guru
Member#: 6850
Join Date: May 2001
Chapter/Region:
MAIC
Location: SoBWI, MD
Vehicle:1996 Camaro Z28 1LE, '06 IAG WRX & '19 XV |
Quote:
I didn't have quite that kind of problem with my '06 WRX, but then again, the drivetrain is completely different. Instead, I would just get a lot of wheelspin. Changing out the front and rear diffs really helped my car a lot. |
|
11-06-2011, 08:16 PM | #22 | ||
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Quote:
Quote:
|
||
11-13-2011, 10:04 PM | #23 |
Scooby Newbie
Member#: 158933
Join Date: Sep 2007
Chapter/Region:
MWSOC
Location: Edon OH
Vehicle:2005 Subaru STi WRB |
Just some updates and I know it was debated earlier in the thread:
Spring rates - is there a way to calculate what I am going to need or is it merely just trial and error? I'd like to get some other input on this before I go ahead and order my springs. |
11-13-2011, 11:34 PM | #24 |
Scooby Newbie
Member#: 162988
Join Date: Oct 2007
Chapter/Region:
MAIC
Location: Manassas/ Lynchburg
Vehicle:06 06 Sti SM&STU IAG/EvoSchool/Osgiken |
I co-drive my buddy martins bsp car (06 sti soon to be asp) at national tour and pro-solo events and he put the Cusco RS diff in it and man did it make a night and day difference. but let me tell you!!! it is not a diff you want to drive around on a daily basis... we drive the car to and fro events and man when you are pulling out of a gas station it will pop/crack and sound almost broken. Its funny though, the second you launch and are on course the diff feels amazing, the car responds 10000X better than the stock diff. On show case sweepers the car does not feel like its gona wash out or understeer and it pretty much eliminates "bouncing out of corners." I personally own a 06sti the i am building for stu class and it takes a bit of adjustments(suspension) to keep all 4 wheels on the ground, i feel i am finally getting there now lol. Now putting the RS diff in is pricy but in the end you will be happy, just wish i was aloud to in stu class.
|
11-13-2011, 11:44 PM | #25 |
Scooby Newbie
Member#: 162988
Join Date: Oct 2007
Chapter/Region:
MAIC
Location: Manassas/ Lynchburg
Vehicle:06 06 Sti SM&STU IAG/EvoSchool/Osgiken |
o and p.s. not to scare you but i snapped a rear axel in the Atlanta National tour. Surprisingly didn't happen on the launch but rather after when i was in a 3gear high speed slalom, according to my video it happend when i was transitioning from left to right and the diff locked a little harder than usual. In all honesty i would not let this deter you from buying it. Martin and i estimate that our times improved by about 1.3sec with the diff in. O and thanks again CamaroFS34 (karen) for hooking us up again in Atlanta with a new axel you were a life saver!
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
STi Shortblock build up question. | Slowsoul | Built Motor Discussion | 4 | 04-08-2008 05:24 PM |
FS/partial trade: '05 STi Asp Wht/silver 25K miles, NC | PWR4HIM | Private Vehicle 'For Sale' Classifieds | 3 | 02-11-2008 10:29 PM |
sti motor build | bbarnett83 | Built Motor Discussion | 1 | 10-12-2007 03:30 PM |
sti motor build | bbarnett83 | Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) | 2 | 10-11-2007 10:59 AM |
WTB: 2004/2005 WRX or STI Hood + 2004/2005 WRX/STI/RS trunk lid | eclip5e | NESIC Private Classifieds | 3 | 02-05-2007 11:07 AM |