2007 Wrx Vf39

afviper · 01-24-2009, 12:05 AM

2007 WRX wagon, VF39 turbo, CSS TMIC, Invidia catted DP, STI catback.

Just got back from a tune at Kito Auto Sport on the Mustang dyno with some surprising numbers. It made 265 hp at 5600rpm and 293 trq at 3700rpm. The only thing that worries me is the way the torque peaks early on, and the boost seems way too high at 21.8 psi. Does boost seem right to you, or should that peak not be there?

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PikkaGTR · 01-24-2009, 01:12 AM

22lbs seems like a lot
when I was stg2 07sti it only peaked to about 18-19

afviper · 01-24-2009, 01:22 AM

I bought the car with the VF39 turbo already installed so I am not sure if the previous owner replaced the wrx restrictor pill. I'll try taking a look at the pill tomorrow and see if it is the small wrx one or if it was already drilled/replaced with the sti one. I'll have to talk to the tuner on Monday and figure this out, hopefully I won't be charged for a full tune if it needs to go back on the dyno.

Bullwinkle1983 · 01-24-2009, 11:13 AM

21-22 PSI is fine in the midrange with the VF39, as long as it doesn't overboost on the highway. I'd be more concerned about the "boost bump" at peak torque there. Looks like your tune is overshooting boost targets and overcompensating.

HSBabyFace · 01-24-2009, 11:16 AM

I'm guessing this is 91 octane.... and what kind of EM are you using

afviper · 01-24-2009, 11:42 AM

Actually 92 octane, and it was protuned.

sidewayz · 01-24-2009, 11:52 AM

a little lean???

cucamelsmd15 · 01-24-2009, 01:05 PM

Im gonna go out on a limb here and say thats a pretty poor tune.

boston_errol · 01-24-2009, 03:39 PM

Isn't the 2.5" STI catback a bit too small for your goals?

afviper · 01-24-2009, 04:24 PM

I just wanted something quieter than the SPT catback that was on there when I bought it. I also don't really have goals for big power, my goal is to get it to run safely, 22 psi doesn't sound like a safe boost number to me. I doubt that the difference of .5" in the catback makes much difference in power. From what I read the biggest restriction in the stock exhaust is in the cats in the downpipe.

1sicWRX · 01-24-2009, 05:37 PM

Quote:

Originally Posted by cucamelsmd15

Im gonna go out on a limb here and say thats a pretty poor tune.

I would say your on the right track.

afviper · 01-27-2009, 02:23 PM

I got a reply from Kito Auto Sport, and it sounds like they will take care of the problem for free! They will put in the STI restrictor pill and get the boost down to the levels I am looking for.

I also have a question on where the AFR should be. I am not sure what is considered to lean or too rich. It seems like AFR dips down too much when boost hits is 10.3 way too rich? Also, should AFR be a bit more rich as the revs rise? Would AFR above 12 cause really high exhaust temps?

If this is getting a bit off topic I can go to the tunning forum, just let me know.

littlewhitewagon · 02-02-2009, 05:31 PM

Yes, lean will cause high exhaust and cylinder temps.

You should try to stabilize the boost gain and keep the AFR from leaning out.

captain spaulding · 02-03-2009, 10:03 AM

I'd highly recommend picking up a GM BCS and have that tuned the next time you goto the dyno, that would likely get rid of your boost issues and give you better response from the turbo, it did wonders on my TD04.. you don't need it, and others will probably tell me I'm an idiot and dunno what I'm talking about(isn't that the NASIOC way?), but this is just from personal experience..

Gray Ghost · 02-03-2009, 10:39 AM

Quote:

Originally Posted by captain spaulding

I'd highly recommend picking up a GM BCS and have that tuned the next time you goto the dyno, that would likely get rid of your boost issues and give you better response from the turbo, it did wonders on my TD04.. you don't need it, and others will probably tell me I'm an idiot and dunno what I'm talking about(isn't that the NASIOC way?), but this is just from personal experience..

+1 or the ingersoll-rand is even a little better. Nice smooth boost control with no overboost issues. Just need to put it on before your tune so they can work with it. I think Kito used to carry them.

captain spaulding · 02-03-2009, 11:15 AM

Quote:

Originally Posted by Gray Ghost

+1 or the ingersoll-rand is even a little better. Nice smooth boost control with no overboost issues. Just need to put it on before your tune so they can work with it. I think Kito used to carry them.

yeah, I actually got the flying performance one, which is the same as the Ingersoll-Rand BCS..

Bullwinkle1983 · 02-03-2009, 11:22 AM

Quote:

Originally Posted by captain spaulding

yeah, I actually got the flying performance one, which is the same as the Ingersoll-Rand BCS..

As long as it's the 3-port design, they're all basically exactly the same (Perrin, GMBCS, etc).

Pink sOck12 · 02-03-2009, 01:39 PM

nice!

cmurda · 02-03-2009, 03:23 PM

nice numbers, curves could be a lot smoother

afviper · 02-06-2009, 06:34 PM

Got the car retuned with the STI restrictor pill installed. Very happy with the results, I asked for a more conservative tune that would work with California 91 gas without knocking. Got just that, boost is now smooth with no peak, the AFR is taken at the tailpipe so it is not accurate on the graph, AFR is where it should be when measured at the front o2 sensor. Spool is earlier than it was, and there is a lot more torque down below 3000rpm. I have nothing but good things to say about Kito Auto Sport, they didn't charge me anything for the second tune, or for the STI restrictor pill that they supplied and installed.

Silver Bullet 2.0 · 02-06-2009, 07:01 PM

those are pretty good numbers for that dyno with a vf39, I got my car tuned there too, and it reads lowww.

afviper · 02-06-2009, 07:03 PM

It does read low, they told me a stock STI makes about 230hp on the dyno.

01-24-2009, 12:05 AM	#1
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	2007 Wrx Vf39 2007 WRX wagon, VF39 turbo, CSS TMIC, Invidia catted DP, STI catback. Just got back from a tune at Kito Auto Sport on the Mustang dyno with some surprising numbers. It made 265 hp at 5600rpm and 293 trq at 3700rpm. The only thing that worries me is the way the torque peaks early on, and the boost seems way too high at 21.8 psi. Does boost seem right to you, or should that peak not be there? * Registered users of the site do not see these ads.

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01-24-2009, 01:12 AM	#2
PikkaGTR Scooby Newbie Member#: 179940 Join Date: May 2008 Location: SJ Vehicle: 2007 Sti SWP	22lbs seems like a lot when I was stg2 07sti it only peaked to about 18-19

01-24-2009, 01:22 AM	#3
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	I bought the car with the VF39 turbo already installed so I am not sure if the previous owner replaced the wrx restrictor pill. I'll try taking a look at the pill tomorrow and see if it is the small wrx one or if it was already drilled/replaced with the sti one. I'll have to talk to the tuner on Monday and figure this out, hopefully I won't be charged for a full tune if it needs to go back on the dyno.

01-24-2009, 11:13 AM	#4
Bullwinkle1983 Scooby Newbie Member#: 172332 Join Date: Feb 2008 Location: St Paul, MN Vehicle: 2006 WRX 18g'd and RomRaided	21-22 PSI is fine in the midrange with the VF39, as long as it doesn't overboost on the highway. I'd be more concerned about the "boost bump" at peak torque there. Looks like your tune is overshooting boost targets and overcompensating.

01-24-2009, 11:16 AM	#5
HSBabyFace Scooby Specialist Member#: 130204 Join Date: Oct 2006 Chapter/Region: MAIC Location: Lburg Vehicle: 06 WRX IAG Built 11 Denali	I'm guessing this is 91 octane.... and what kind of EM are you using

01-24-2009, 11:42 AM	#6
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	Actually 92 octane, and it was protuned.

01-24-2009, 11:52 AM	#7
sidewayz Scooby Specialist Member#: 5810 Join Date: Apr 2001 Chapter/Region: Tri-State Location: Easton PA Vehicle: 2001 S366 2.5RS	a little lean???

01-24-2009, 01:05 PM	#8
cucamelsmd15 Scooby Specialist Member#: 122980 Join Date: Aug 2006 Chapter/Region: South East Location: Raleigh, NC Vehicle: 2010 F150, 2013 CX-5 92 Miata 15 TTF/PTF/E3	Im gonna go out on a limb here and say thats a pretty poor tune.

01-24-2009, 03:39 PM	#9
boston_errol Scooby Specialist Member#: 179007 Join Date: May 2008 Chapter/Region: NESIC Location: Brighton, MA Vehicle: 2005 Legacy GT Wagon ABP	Isn't the 2.5" STI catback a bit too small for your goals?

01-24-2009, 04:24 PM	#10
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	I just wanted something quieter than the SPT catback that was on there when I bought it. I also don't really have goals for big power, my goal is to get it to run safely, 22 psi doesn't sound like a safe boost number to me. I doubt that the difference of .5" in the catback makes much difference in power. From what I read the biggest restriction in the stock exhaust is in the cats in the downpipe.

01-27-2009, 02:23 PM	#12
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	I got a reply from Kito Auto Sport, and it sounds like they will take care of the problem for free! They will put in the STI restrictor pill and get the boost down to the levels I am looking for. I also have a question on where the AFR should be. I am not sure what is considered to lean or too rich. It seems like AFR dips down too much when boost hits is 10.3 way too rich? Also, should AFR be a bit more rich as the revs rise? Would AFR above 12 cause really high exhaust temps? If this is getting a bit off topic I can go to the tunning forum, just let me know.

02-02-2009, 05:31 PM	#13
littlewhitewagon Scooby Guru Member#: 103068 Join Date: Dec 2005 Chapter/Region: SCIC Location: PM me if I don't answer posts Vehicle: 11 STI sedan SWP	Yes, lean will cause high exhaust and cylinder temps. You should try to stabilize the boost gain and keep the AFR from leaning out.

02-03-2009, 10:03 AM	#14
captain spaulding Scooby Newbie Member#: 104639 Join Date: Jan 2006 Chapter/Region: Tri-State Location: Central NJ Vehicle: '06 WRX Wagon Red	I'd highly recommend picking up a GM BCS and have that tuned the next time you goto the dyno, that would likely get rid of your boost issues and give you better response from the turbo, it did wonders on my TD04.. you don't need it, and others will probably tell me I'm an idiot and dunno what I'm talking about(isn't that the NASIOC way?), but this is just from personal experience..

02-03-2009, 01:39 PM	#18
Pink sOck12 Scooby Newbie Member#: 175988 Join Date: Mar 2008 Chapter/Region: Tri-State Location: LI NY Vehicle: 07 STi CGM	nice!

02-03-2009, 03:23 PM	#19
cmurda Scooby Newbie Member#: 141609 Join Date: Feb 2007	nice numbers, curves could be a lot smoother

02-06-2009, 06:34 PM	#20
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	Got the car retuned with the STI restrictor pill installed. Very happy with the results, I asked for a more conservative tune that would work with California 91 gas without knocking. Got just that, boost is now smooth with no peak, the AFR is taken at the tailpipe so it is not accurate on the graph, AFR is where it should be when measured at the front o2 sensor. Spool is earlier than it was, and there is a lot more torque down below 3000rpm. I have nothing but good things to say about Kito Auto Sport, they didn't charge me anything for the second tune, or for the STI restrictor pill that they supplied and installed.

02-06-2009, 07:01 PM	#21
Silver Bullet 2.0 Scooby Specialist Member#: 89508 Join Date: Jun 2005 Chapter/Region: NWIC Location: Issaquah, WA Vehicle: 2001 RSTi w/PPG tightness. hella un-flush	those are pretty good numbers for that dyno with a vf39, I got my car tuned there too, and it reads lowww.

02-06-2009, 07:03 PM	#22
afviper Scooby Newbie Member#: 89493 Join Date: Jun 2005 Chapter/Region: NWIC Location: Kirkland, WA Vehicle: 2001 Impreza 2.5RS Red	It does read low, they told me a stock STI makes about 230hp on the dyno.