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Old 12-17-2008, 12:37 AM   #1
KevlarSTi
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Satin White Pearl

Default SS-Tuned VF43 07 STI on Meth - 338/440

Last Friday, months after unsuccessfully trying to get my car tuned up in Atlanta, my car was tuned by Scott Siegel at S&R Performance in Tampa, FL. The external wastegate was behaving a little strangely (boosting almost 16 psi on spring pressure), so we had to run really low wastegate duty cycle, with a VERY low turbo dynamics value, but it worked great in the end - the stock ECU really has some incredible processing power to work so well outside of the range of ideal values.

On the dyno:


With the car strapped down, it was sitting LOW in the rear. I can't believe it didn't rub! You could have held a credit card between the tire and the fender. Gotta love 255's.


Video from some pulls (I recommend watching in High Quality):
http://www.youtube.com/watch?v=_AX51oOXzcQ
http://www.youtube.com/watch?v=sX-F18ruNa4

And of course, the final numbers:

Solid line is pump + meth, dashed line is pump.

After a few hours on the rollers, she put down 337.9 AWHP and 439.4 lb-ft (uncorrected) at 23.5 psi on 93 Octane + Meth, and 318.4/379.5 at 20 psi on just pump gas. Not bad for the stock turbo, I'd say. 'Final' numbers should be a little higher than this, as Scott was able to add more timing during the road tune. The dyno was extremely noisy, and was likely upsetting the knock sensor, causing it to pull some timing. On the (quieter) street, the timing was added back in. There definitely wasn't anything left in the turbo though, as more boost was just creating more hot air. Now I need a bigger turbo... Oh, and probably a new clutch, because I don't think the stock clutch is going to be happy with 440 lb-ft at the wheels for very long

Engine Mods:
Cobb Accessport v2
APS 65mm CAI
APS Turbo Inlet
Ported Y-Pipe, TB
TGV Deletes
Phenolic TGV Spacers
Gruppe-S Unequal Length Manifold (Swaintech Coated)
Grimmspeed Uppipe (Coated and Wrapped)
Tial 38mm EWG (vented to atmosphere)
Ingersoll-Rand 3-port BCS
Invidia V3 Downpipe (Wrapped)
Perrin Dual-Tube Catback
Alkycontrol Methanol Injection
Walbro 255lph Fuel Pump
NGK LFR7AIX 1-Step Colder Plugs
Perrin Lightweight Crank Pulley

Overall, I'm very happy with the tune. Feels like a new car now . Big thanks to Scott for the results and the smooth power, as well as for getting the boost to hold rock solid even with how strangely the EWG was behaving. I'm heading to the track for the first time on Thursday, so we'll have to see how she runs down the quarter.
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Last edited by KevlarSTi; 12-17-2008 at 02:52 AM.
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Old 12-17-2008, 01:54 AM   #2
arch4life
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interesting. good power. makes me want meth. what boost were you at at redline?
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Old 12-17-2008, 02:14 AM   #3
valetudospang
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Man this would be a fun street car. Must hit like a brick!
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Old 12-17-2008, 08:17 AM   #4
the Fozz
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yay for a local FS member great numbers can't wait to see this in person
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Old 12-17-2008, 08:54 AM   #5
CoolRex
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Scott is the man! I love the ramp up in torque.....too bad it can't hold it!

I bet it lights the tires up fairly easily now!

Congrats!
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Old 12-17-2008, 10:51 AM   #6
STi Mikey
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Default

Quote:
Originally Posted by KevlarSTi View Post
Last Friday, months after unsuccessfully trying to get my car tuned up in Atlanta, my car was tuned by Scott Siegel at S&R Performance in Tampa, FL. The external wastegate was behaving a little strangely (boosting almost 16 psi on spring pressure), so we had to run really low wastegate duty cycle, with a VERY low turbo dynamics value, but it worked great in the end - the stock ECU really has some incredible processing power to work so well outside of the range of ideal values.

On the dyno:


With the car strapped down, it was sitting LOW in the rear. I can't believe it didn't rub! You could have held a credit card between the tire and the fender. Gotta love 255's.


Video from some pulls (I recommend watching in High Quality):
http://www.youtube.com/watch?v=_AX51oOXzcQ
http://www.youtube.com/watch?v=sX-F18ruNa4

And of course, the final numbers:

Solid line is pump + meth, dashed line is pump.

After a few hours on the rollers, she put down 337.9 AWHP and 439.4 lb-ft (uncorrected) at 23.5 psi on 93 Octane + Meth, and 318.4/379.5 at 20 psi on just pump gas. Not bad for the stock turbo, I'd say. 'Final' numbers should be a little higher than this, as Scott was able to add more timing during the road tune. The dyno was extremely noisy, and was likely upsetting the knock sensor, causing it to pull some timing. On the (quieter) street, the timing was added back in. There definitely wasn't anything left in the turbo though, as more boost was just creating more hot air. Now I need a bigger turbo... Oh, and probably a new clutch, because I don't think the stock clutch is going to be happy with 440 lb-ft at the wheels for very long

Engine Mods:
Cobb Accessport v2
APS 65mm CAI
APS Turbo Inlet
Ported Y-Pipe, TB
TGV Deletes
Phenolic TGV Spacers
Gruppe-S Unequal Length Manifold (Swaintech Coated)
Grimmspeed Uppipe (Coated and Wrapped)
Tial 38mm EWG (vented to atmosphere)
Ingersoll-Rand 3-port BCS
Invidia V3 Downpipe (Wrapped)
Perrin Dual-Tube Catback
Alkycontrol Methanol Injection
Walbro 255lph Fuel Pump
NGK LFR7AIX 1-Step Colder Plugs
Perrin Lightweight Crank Pulley

Overall, I'm very happy with the tune. Feels like a new car now . Big thanks to Scott for the results and the smooth power, as well as for getting the boost to hold rock solid even with how strangely the EWG was behaving. I'm heading to the track for the first time on Thursday, so we'll have to see how she runs down the quarter.
Holy mods!! Good thing your going to a bigger turbo, as you have the support, other wise you could have made the same power with a TBE and boost controller. Hopefully I'll see you fly by me on one of the highways down there, I leave for my uncle's place down in Tampa tomorrow

Nice setup, nice car, nice power

Have fun man,

Mikey
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Old 12-17-2008, 11:35 AM   #7
the Fozz
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Join Date: Mar 2008
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Location: Bradenton, FL
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04 ppg'ed fozzy
psm

Default

u goin to bmp thursday??
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Old 12-17-2008, 12:02 PM   #8
KevlarSTi
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Satin White Pearl

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Quote:
Originally Posted by the Fozz View Post
u goin to bmp thursday??
Yep, that's the plan
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Old 12-17-2008, 12:56 PM   #9
the Fozz
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psm

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sweet can't wait to see it in person
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Old 12-17-2008, 03:12 PM   #10
1SiKWaGoN
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Stock injectors?
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Old 12-17-2008, 06:41 PM   #11
KevlarSTi
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Satin White Pearl

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Quote:
Originally Posted by 1SiKWaGoN View Post
Stock injectors?
Yep. Duty cycle on the pump map was pretty high IIRC, but with the meth you use less fuel.
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Old 12-17-2008, 07:25 PM   #12
TimeAtk
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HOly TORQUE
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Old 12-18-2008, 12:40 AM   #13
northmiler89
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on the stock top mount! very niceee i like.
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Old 12-18-2008, 07:28 PM   #14
TDagen
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track times?
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Old 12-18-2008, 09:10 PM   #15
the Fozz
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psm

Default

hes at the track right now should be back soon

Last edited by the Fozz; 12-18-2008 at 09:32 PM.
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Old 12-18-2008, 09:22 PM   #16
Spec_C
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Tuned by Chris Black@AMS

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good looking tune! looking forward to the track results
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Old 12-18-2008, 10:58 PM   #17
northmiler89
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Quote:
Originally Posted by Spec_C View Post
good looking tune! looking forward to the track results
Ditto
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Old 12-19-2008, 01:02 PM   #18
klattery
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That's some nice power for stock VF43 and TMIC.

What does a stock STi put down on that dyno? I would guess something like 240, but even then 100whp gain is great.
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Old 12-19-2008, 02:58 PM   #19
jays05
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Nice numbers.


I had a similar problem with overboosting on the WG spring when I had the EWG boost reference line tapped into the intake manifold. Moving it to the compressor outlet fixed everything.
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Old 01-03-2009, 02:07 AM   #20
KevlarSTi
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Well, a sad update for this thread

I took the car to the track (first time ever for both myself and the car). I've launched the car at autocrosses before, but never at the strip, so my technique that usually leaves me spinning all four had me bogging. Only got one or two half-decent passes in, the best of which being a 12.9@109 with a 1.78 60'. I felt like the car could have gone faster with a better launch/faster shifting (the lower adjustment on my Cobb short-shifter never seems to hold up to aggressive shifts and drops down to the console...), but that shouldn't have affected the trap speed much. This is at sea level, mind you.

Before my last run, when I started the car, I noticed a bit of a shudder/hesistation, like the car wanted to stall, but then it kicked back up and seemed fine, so I didn't think anything of it (just another Subaru quirk...). Drove the car 45 mins back to Tampa, cruising on the freeway, and parked the car. 15 minutes later, I got back in my car and went to a friend's place for the night. The car stumbled when I started up, and almost stalled. En route to my friend's house (~5 mins away), the car threw a P0304 CEL - Cylinder 4 misfire. The next morning, the car started with a small cloud of white smoke and more stumbling, now with a rather rough idle. I checked all of the coil/injector connections, and reset the ECU - the car started up and seemed to idle fine, but by the time I got home, it had reverted to the ****ty idle.

I left the next morning on vacation, and just got back on the 30th. First attempt at starting the car yielded a cloud of white smoke, and pulling the oil fill cap revealed puffs of white smoke coming from the crankcase. Did a compression test today, and Cylinder 4 is way low . Damned 07's! . Obviously the cylinder 4 ringlands let go, and this seems to be a frighteningly common issue with 07's, and now 08's. Not sure what to do with the car now...

This could have been a problem that originated when the car was stock, but didn't get bad until I got tuned and started driving it harder. Hard to say. Seeing as even stock 07's and 08's are blowing #4, I feel like this should be a warranty issue, but I'm thinking that's not likely with the mod list I have going (even if the local dealership is 'mod-friendly'). Anyway, I don't exactly want another set of stock pistons. I may have to suck it up and have some forged CP's put in. I was planning to do it eventually, but this is sooner than I would have liked. Any recommendations?

Oh, and to top it all off, while I was doing the compression test, my father accidentally ran over my laptop and external harddrive, killing both. Happy frickin' New Year
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Old 01-03-2009, 02:16 AM   #21
jordanretro1223
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That sucks man. I hate seeing more 07 carnage, it really makes me scared and angry too...

I'd say just go ahead with the forged pistons. While it may be somewhat costly you'll be able to rest easily knowing you have the stronger pistons in there.

Good luck.
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Old 01-03-2009, 02:55 AM   #22
Prevent
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mahle pistons are always great
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Old 01-03-2009, 08:25 AM   #23
Tenacious Bee
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So, what to play
with next ?

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Not to get OT or start a debate but my 07 Sti SB has been holding up to 23.5 pounds of boost from my green sized turbo pretty much all of it's life. It has endured more than a few knock events while I was learning how to tune it. I did get scared off by the 07 fail threads and decided to stop tuning it myself and get a map from a professional. I drive this car hard a lot and so far so good. About 14,000 miles on it so far. I only post this so that everyone with an 07 does not loose sleep over their pistons. I am pretty sure the 08 failures were mostly due to an ecu problem. I know a guy with a Dom 3 on his 08 sti and another with a 20G on his 08 spec B. So far so good.
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Old 01-03-2009, 09:03 AM   #24
eatus ravenous
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Kevlarsti,
I looks as your problem started on the dyno while tuning . didnt anyone notice the puff of smoke from what looks to be the BOV in the first video .sorry for your misfortune but as we all know if you want to play you will have to pay
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Old 01-03-2009, 09:56 AM   #25
KevlarSTi
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Quote:
Originally Posted by eatus ravenous View Post
Kevlarsti,
I looks as your problem started on the dyno while tuning . didnt anyone notice the puff of smoke from what looks to be the BOV in the first video .sorry for your misfortune but as we all know if you want to play you will have to pay
Nah, that's just steam. The IC was getting heatsoaked, so it was sprayed down with water between runs. What looks like smoke is the water evaporating.
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