2008 STI - 312whp/401wtq

sponaugle · 02-02-2008, 08:16 PM

Numbers
Dyno: Mustang
Tuner: Myself (Jeff Sponaugle)
Wheel HP: 312 92+Meth/Water
Wheel TQ: 401 92+Meth/Water

Year: 2008 STI
Engine Management: Cobb Accessport
Turbo: Stock
Intercooler: Stock
Meth Kit: Perrin PW1
Injectors: Stock
Intake/Inlet: Stock
Headers: Stock
Uppipe: Stock
Downpipe: Perrin
CBE: Custom, Magnaflow Dual

As most of you know from the previous posts, we have been playing around with the accessport on my 2008 STI. In late December we made it a stage 2 setup with the addition of a Perrin downpipe and a custom twin Magnaflow exhaust.

This weekend I added a Perrin PW-1 Water injection kit (Aquamist).

I am running a 50/50 mix of meth/water.

Before running the meth, I explored the AVCS intake and exhaust variables a bit. With a bit more boost, and a lot more overlap, I was able to eeek out 374 lb-ft of torque on pump 92 octane fuel.

I turned on the WI, using .6 nozzel (which is a small nozzel, so not a huge amount of meth/water). With a bit leaner AFRs, and a bit more timing I was able to get 401 lb-ft of torque and 312 whp.

Not bad for a stage 2 car with the stock VF48 turbo.

The 08 is growing on me.

Cheers,

Jeff Sponaugle

amg destroyer · 02-02-2008, 08:23 PM

That is very impressive. Especially on a Mustang dyno.

I'm starting to like the '08's

Chris05STi · 02-02-2008, 08:33 PM

M10 is what I use for my STi, M15 is what I plan on using with my SZ55. You def need to put a bigger nozzle in there, I believe the M7 or M6 is for a WRX. Very good work none the less, btw, what did the stock '08 STi put on that dyno?

sponaugle · 02-02-2008, 08:43 PM

Quote:

Originally Posted by Chris05STi

M10 is what I use for my STi, M15 is what I plan on using with my SZ55. You def need to put a bigger nozzle in there, I believe the M7 or M6 is for a WRX. Very good work none the less, btw, what did the stock '08 STi put on that dyno?

I used a .6mm aquamist nozzel. I assume by M10/M15 you are referring to some other type/size of nozzel. The nozzel size is not specific to the type of car, but only related to the ratio of water+meth to fuel you are looking for.

The stock car is on the graph above, in blue.

Jeff

o0)FuNkTrAiN(0o · 02-02-2008, 09:07 PM

Damn sweet torque maing.

mofoSTI · 02-02-2008, 09:13 PM

I dig how fast is spools compaired to stock. I wonder what could be had with an ewg or helper spring.

Desi_WRX · 02-02-2008, 10:51 PM

nice numbers!!

***kris*** · 02-03-2008, 10:19 AM

Unless I'm staring straight at it, where is the water tank? And those are great numbers, can't wait to tune mine.

sponaugle · 02-03-2008, 10:41 AM

Quote:

Originally Posted by kris

Unless I'm staring straight at it, where is the water tank? And those are great numbers, can't wait to tune mine.

The pump is attached to the tank. That is the tank behind the Aquamist setup. I have a better pic I can post up.

Cheers,

Jeff Sponaugle

CenCali07STI · 02-04-2008, 10:31 PM

very nice numbers. Amazing though how fast all that torque falls off.

**Gokart3** · 02-06-2008, 03:41 PM

Nice!

RFFG · 02-06-2008, 03:48 PM

wow, nice!

bklynpanman · 02-13-2008, 07:42 AM

and you blew a ringland how?

sponaugle · 02-13-2008, 08:48 AM

Quote:

Originally Posted by bklynpanman

and you blew a ringland how?

Oh the ringland collapse had nothing to do with the above tune, as it happened before the Meth install. It was a small user error on my part.

In particular I was recalibrating the MAP sensor in the UTEC (the map sensor in the new car is not the same as the old), and I fat fingered it.. Since I was using the UTEC boost control in PID mode, it did a great job of retargeting the boost to his the 20psi... Unfortunately that ended up being about 24psi. First and second gear didn't hit that high (not enough load and duty cycle), but one nice long 4th gear pull, followed by some flashes up top seemed to be it. It had a small puff at idle... ah the sign of the ringland. As posted on Nasioc in a few places, that is where I discovered that the pistons are indeed the same as the previous year.. and indeed as fragile if you do something stupid.

It was cool to take apart the new 08 motor and see how the exhaust AVCS setup looked.

I should add however that any agressive tune with Meth has some inherent danger if the meth system fails. For that reason I used the Aquamist stuff with the flow sensor and boost cut option. If the system fails, the boost will be wastegate.

Cheers,

Jeff Sponaugle

**Digitalfiend** · 02-13-2008, 09:06 AM

Are the pistons in the 07-08 the same as the 04-06?

02-02-2008, 08:16 PM	#1
sponaugle Junior STI Driver Car: 08STI,02WRX-H6Turbo Location: Portland, Oregon Posts: 111 Join Date: Jan 2004 Trader Rating: (0)	2008 STI - 312whp/401wtq Numbers Dyno: Mustang Tuner: Myself (Jeff Sponaugle) Wheel HP: 312 92+Meth/Water Wheel TQ: 401 92+Meth/Water Year: 2008 STI Engine Management: Cobb Accessport Turbo: Stock Intercooler: Stock Meth Kit: Perrin PW1 Injectors: Stock Intake/Inlet: Stock Headers: Stock Uppipe: Stock Downpipe: Perrin CBE: Custom, Magnaflow Dual As most of you know from the previous posts, we have been playing around with the accessport on my 2008 STI. In late December we made it a stage 2 setup with the addition of a Perrin downpipe and a custom twin Magnaflow exhaust. This weekend I added a Perrin PW-1 Water injection kit (Aquamist). I am running a 50/50 mix of meth/water. Before running the meth, I explored the AVCS intake and exhaust variables a bit. With a bit more boost, and a lot more overlap, I was able to eeek out 374 lb-ft of torque on pump 92 octane fuel. I turned on the WI, using .6 nozzel (which is a small nozzel, so not a huge amount of meth/water). With a bit leaner AFRs, and a bit more timing I was able to get 401 lb-ft of torque and 312 whp. Not bad for a stage 2 car with the stock VF48 turbo. The 08 is growing on me. Cheers, Jeff Sponaugle This ad is not endorsed by this member. Please register or login to hide this ad.

02-02-2008, 08:23 PM	#2
amg destroyer Iron Fisted Car: '05 STi Fav Mod: Sparco seat Location: OC Posts: 4,184 Join Date: Sep 2006 Trader Rating: (4)	Re: 2008 STI 312 whp/401 lb-ft That is very impressive. Especially on a Mustang dyno. I'm starting to like the '08's

02-02-2008, 08:33 PM	#3
Chris05STi I Has a Turbo Timer Car: 2005 Subaru WRX STi Fav Mod: Every single one! Location: NJ Posts: 9,706 Join Date: Jun 2005 Trader Rating: (27)	Re: 2008 STI 312 whp/401 lb-ft M10 is what I use for my STi, M15 is what I plan on using with my SZ55. You def need to put a bigger nozzle in there, I believe the M7 or M6 is for a WRX. Very good work none the less, btw, what did the stock '08 STi put on that dyno?

02-02-2008, 09:07 PM	#5
o0)FuNkTrAiN(0o Junior STI Driver Car: 05 STi WRB Fav Mod: GC-06Hs & RE-01Rs Posts: 179 Join Date: Aug 2005 Trader Rating: (0)	Re: 2008 STI 312 whp/401 lb-ft Damn sweet torque maing.

02-02-2008, 09:13 PM	#6
mofoSTI Spec C Club Car: 08 STI,sr20det 510 Fav Mod: boob job for wife Location: springtuckey, OR Posts: 2,441 Join Date: Sep 2004 Trader Rating: (0)	Re: 2008 STI 312 whp/401 lb-ft I dig how fast is spools compaired to stock. I wonder what could be had with an ewg or helper spring.

02-02-2008, 10:51 PM	#7
Desi_WRX Lurker Car: 03 Subaru WRX Fav Mod: Coming Soon Posts: 1 Join Date: Jan 2008 Trader Rating: (0)	Re: 2008 STI 312 whp/401 lb-ft nice numbers!!

02-03-2008, 10:19 AM	#8
*kris* Platinum Member Car: 08 STI Location: Toronto Posts: 290 Join Date: Aug 2004 Trader Rating: (1)	Re: 2008 STI - 312 whp/401 lb-ft Unless I'm staring straight at it, where is the water tank? And those are great numbers, can't wait to tune mine.

02-04-2008, 10:31 PM	#10
CenCali07STI Professional STI Racer Car: 07 STI SWP Fav Mod: Custom built TBE FTW!!! Location: Modesto, California Posts: 839 Join Date: Feb 2007 Trader Rating: (1)	Re: 2008 STI - 312 whp/401 lb-ft very nice numbers. Amazing though how fast all that torque falls off.

02-06-2008, 03:41 PM	#11
Gokart3 Gold Member Car: 06 CGM STi Fav Mod: ADVAN RS wheels Location: Portland, OR Posts: 197 Join Date: Nov 2007 Trader Rating: (1)	Re: 2008 STI - 312 whp/401 lb-ft Nice!

02-06-2008, 03:48 PM	#12
RFFG Spec C Club Car: 1998 Impreza GF8 Location: Miami, Fl. Posts: 2,458 Join Date: Aug 2005 Trader Rating: (3)	Re: 2008 STI - 312 whp/401 lb-ft wow, nice!

02-13-2008, 07:42 AM	#13
bklynpanman STI Driver Car: 08 STI WHITE ! ! ! Fav Mod: Coming Soon Location: NJ Posts: 223 Join Date: Dec 2007 Trader Rating: (0)	Re: 2008 STI - 312 whp/401 lb-ft and you blew a ringland how?

02-13-2008, 09:06 AM	#15
Digitalfiend Super Moderator Car: 08 DGM STI Fav Mod: My wife :) Location: Brooklin, Ontario Posts: 5,541 Join Date: Oct 2003 Trader Rating: (0)	Re: 2008 STI - 312 whp/401 lb-ft Are the pistons in the 07-08 the same as the 04-06? This ad is not endorsed by this member. Please register or login to hide this ad.