STU #86 - 2006 Evo IX SE - evolutionm.net



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STU #86 - 2006 Evo IX SE

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Old Sep 20, 2016, 11:18 PM   #1
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STU #86 - 2006 Evo IX SE

Hey everyone, my name's Jimmy and I'm an autocrosser from California, and a member of the SFR region. I've been running my 2006 Evo IX SE in STU for the past 3 years now and I've finally decided to make a build/progress thread to serve as a brain dump/sounding board, plus it might help to encourage others to come play in STU . Though they're underdogs in STU, these cars are very fun in STU trim and can be very competitive regionally. You'll have your work cut out for you in order to compete with the very best at the National level, but like the STi, I don't see a reason why we can't get reasonably close to the 350z/C5 on the right course

Before I start, I just wanted to say thanks to everyone who's shared knowledge with me on this forum, or just shared knowledge in general through posts and threads on this forum, as well as anyone who's ever co-driven with me or critiqued my driving. Hopefully, I can give a little back through this thread


Parts list

Power:
Magnaflow Ti catback exhaust
Mil.spec 100 cell hi-flow catalytic converter
Megan 3" downpipe
K&N cone intake
91 & 100 octane tunes by FFTEC

Wheels/Tires/Brakes:
18x10 Enkei RPF-1 +38
265/35/18 Bridgestone RE-71R
17x9.5 Enkei RPF-1 +38
255/40/17 BFG Rival S
CiroDesign 19mm lightweight spacers (front)
Ebay 5mm spacers (rear)
ARP extended wheel studs (front)
Ferodo DS2500 pads (front + rear)
Baer Eradispeed front rotors (need to trim backing plates on rear brake pads before installing rear set)
Centric blank rear rotors (for now)

Suspension:
MCS non-remote double adjustable coilovers
Hypercoil springs (700f/1000r)
CiroDesign caster/camber plates
Tein rear top hats
Cusco FSB brackets
Whiteline swaybar endlinks (front + rear)
Whiteline 26mm adjustable rear swaybar
SuperPro Duroball Offset Lower Control Arm Bushings

Alignment:
-3.3* of camber (f)
-1.5* of camber (r)
0 toe (f & r)
5.6* of caster

Other:
Deka EXL-14 battery
Restacked OEM rear differential clutch plates
Rolled rear fenders


A little background on me and my car:

My first autocross event was in 2010 and I bought this Evo shortly afterwards with 54k miles on the clock; fast forward 6 years and she's still kicking with more than 141k miles on the on the clock now . 2015 was my first trip to Solo Nationals, where I finished 8th out of 36 competitors and was able to earn a trophy in the process (only car in the class on the BFG Rival S that year). 2016 was a different story however, as I drove poorly on both days at Nationals (only started to get my head out of my *** on my final run) and I ended up finishing near the back of the field; however, my co-driver was able to nab the final trophy spot in STU (11/39) and my car ended up being the lone Evo in the trophies.


Post 2016 Nats

Now that Nationals has ended, time for some testing! At Nationals, I saw that several of the STi's in the trophies were not running the max allowed tire width (265mm for AWD cars in STU) and some were using the Rival S, which may have helped them dig out of the slower corners even better compared to the cars on 265mm wide tires (I think all of the Evos and some STi's were on these). I started 2016 on my 17" wheels and with a set of 255/40/17 RE-71Rs but didn't have a chance to test them vs. my 265/35/18 RE-71Rs. However, I never felt that the car with the 255 RE-71R was faster or even as fast as it was on the 245 BFG (no data or back-to-back testing to confirm though). Since the set of 255s is heat cycled out/corded (alignment was knocked out of whack during drive home from Lincoln), I'll probably buy a set of 245 or 255 BFGs to test against the 265 RE-71R set I still have. I think on most National-style courses, the extra lateral grip/taller gearing of the 265mm RE-71R is better to have than the better acceleration/shorter gearing/less rotational mass of the narrower RE-71R/Rival S, but on this year's East course, it may have been the opposite. Either way, the BFGs are quieter than the RE71Rs and I don't want to drive the car around on a set of $1100 tires

Last edited by Jim3142; Jan 27, 2017 at 10:01 AM.
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Old Sep 20, 2016, 11:36 PM   #2
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Pictures of the car (more to come):



Photo by Alvin Cheng



Photo by Perry Bennett



Photo by Perry Bennett



Photo by Craig Boyle



Photo by Craig Boyle


Some videos (more to come):


Last edited by Jim3142; Mar 13, 2017 at 09:27 PM.
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Old Sep 21, 2016, 05:47 AM   #3
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Nice build and congrats on the trophy in 2015. If I ever get back into the CT9A chassis, i'd love to tackle STU. Its a bit more affordable than ASP/SM. lol
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Old Sep 21, 2016, 06:38 AM   #4
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looks good. interested to hear how your tire testing results go. the re71rs do seem to run a little narrow, I'm not sure how much that will play a factor. the 255s look like theyre narrower the z2's 245s. planning to run the 255/40-17 re71rs on my stock wheels
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Old Sep 21, 2016, 12:41 PM   #5
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Quote:
Originally Posted by BigT View Post
Nice build and congrats on the trophy in 2015. If I ever get back into the CT9A chassis, i'd love to tackle STU. Its a bit more affordable than ASP/SM. lol
Thanks! The car in STU trim is a ton of fun, and a bit more affordable plus less breakage than ASP/SM. Then again, I've never done a Pro (will be doing my first next year) so who knows


Quote:
looks good. interested to hear how your tire testing results go. the re71rs do seem to run a little narrow, I'm not sure how much that will play a factor. the 255s look like theyre narrower the z2's 245s. planning to run the 255/40-17 re71rs on my stock wheels
When comparing on TireRack between the BFGs and Bridgestones (245s and 255s), they seem to be identical in width. I haven't had a chance to measure them myself but will measure my stack of 255s sitting in the garage before I get new tires.
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Old Sep 21, 2016, 01:20 PM   #6
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good to know. I think heightwise the 255/40s are a little more of a sweetspot than 245/40 or 245/45, unless the 245/40s are taller too. im running 245/45 and it's a little too tall imo
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Old Sep 21, 2016, 05:51 PM   #7
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Nice driving
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Old Sep 22, 2016, 08:18 AM   #8
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Got any more pictures of the 10" RPF1s? They rub at all?
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Old Sep 22, 2016, 08:16 PM   #9
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Quote:
Originally Posted by evoson23 View Post
Nice driving
Thanks! Wish I was able to drive like that at Nats


Quote:
Got any more pictures of the 10" RPF1s? They rub at all?
I added 2 more pictures in my second post. The tires do make a bit of contact with the front of the sideskirt plastic in the wheel well, but that's only near/at full lock.
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Old Sep 22, 2016, 11:15 PM   #10
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I enjoyed the video, very good driving.
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Old Sep 23, 2016, 12:08 PM   #11
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Nice work, car looks great too
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Old Sep 23, 2016, 07:13 PM   #12
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Thanks! She's come a long way but there's still some work to do with the setup
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Old Sep 27, 2016, 12:39 PM   #13
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Quote:
Originally Posted by Jim3142 View Post
Thanks! Wish I was able to drive like that at Nats




I added 2 more pictures in my second post. The tires do make a bit of contact with the front of the sideskirt plastic in the wheel well, but that's only near/at full lock.
What about the rear fenders?
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Old Sep 27, 2016, 02:02 PM   #14
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I'm from Jimmy's area and can vouch for his driving. If he had a nickel for every time he had FTD, he'd be driving a Ferrari by now
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Old Sep 29, 2016, 09:21 AM   #15
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Quote:
Originally Posted by ReidFletcher View Post
What about the rear fenders?
Rear fenders are rolled (not flat), I've seen minor rubbing when going over crappy roads on the way to/from events, rear end tends to get bouncy



Quote:
I'm from Jimmy's area and can vouch for his driving. If he had a nickel for every time he had FTD, he'd be driving a Ferrari by now
Thanks, but it would probably be closer to having a total of a quarter
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