05 STI dyno at GST

98ss · 02-06-2008, 08:50 AM

What do you guys think?
# are kinda low because car is mostly stock.
This is a 05 STI with 20k miles on it.
Only mod is a driveshaft and Cobb APV2.
Running the Cobb Stage 1 CA gas OTS map.
I see max around mid 17 psi boost.
Compare to some of you, this is small fry. But I thought I'd post it as when I was looking, it was nearly impossible to find stock and mildly stock car dyno curves.
Thanks to Mike at GST for the baseline. He kindly talked me out of a protune. Honest guy.

STI_Mike · 02-06-2008, 08:51 AM

good numbers you should have gotten a few move MODS like a TBE and you could have gotten better numbers.

chaos311clarity · 02-06-2008, 08:57 AM

what does a stock STi do on that dyno?

oce420 · 02-07-2008, 04:04 PM

good #s

Peleg · 02-07-2008, 06:06 PM

Typical #'s for stage 1. (no sarcasem)

With turboback or a downpipe, fuel pump, intake you can see more.

rev_happy_sti · 02-07-2008, 10:54 PM

Mikes the man! Yea stock you cant really get much more. Heres my stage2 graph done at GST if you want to compare it, mods are in my sig:

98ss · 02-08-2008, 08:46 AM

You have a lot of mods.
I will be happy with 300 torque and what ever HP I can get.
Car feels pretty good now. However due to my right foot, MPG taken a nose dive.
I guess exhaust is next.
Are there any header out there that can fit under the stock front under tray?

Quote:

Originally Posted by rev_happy_sti

Mikes the man! Yea stock you cant really get much more. Heres my stage2 graph done at GST if you want to compare it, mods are in my sig:

JT's06sti · 02-08-2008, 07:30 PM

those a/f look alittle rich arent they??? thats as safe as it gets...10.5...prolly coulda squeezed alittle more outta it leaning alittle? am i wrong?

CenCali07STI · 02-09-2008, 12:40 AM

Quote:

Originally Posted by chaos311clarity

what does a stock STi do on that dyno?

My 07 was dynoed there stock look at my sig for all my numbers from mikes dyno.

98ss · 02-11-2008, 08:34 AM

Yes I think the AF is a little rich.
Questions is do I want to spend the extra money to get the AF more leaner and maybe a few more HP or do I rather wait to do the exhaust and do a tune together.
Hard choice.
I know everyone said to get a 3" turbo back exhaust. Problem is how is the response when I am not in boost. 70% of the time I am not in boost and if a 3" is going to force me into boost to overtake, then it would suck in the long run.
Has anyone dyno their car at GST with smaller than 3"? Let's say 2.5" or 60mm turbo back exhaust? Also with CAT?

Peleg · 02-11-2008, 05:41 PM

Quote:

Originally Posted by 98ss

Yes I think the AF is a little rich.
Questions is do I want to spend the extra money to get the AF more leaner and maybe a few more HP or do I rather wait to do the exhaust and do a tune together.
Hard choice.
I know everyone said to get a 3" turbo back exhaust. Problem is how is the response when I am not in boost. 70% of the time I am not in boost and if a 3" is going to force me into boost to overtake, then it would suck in the long run.
Has anyone dyno their car at GST with smaller than 3"? Let's say 2.5" or 60mm turbo back exhaust? Also with CAT?

First of, try to get all the mods first before tuning if possible.

Second, I'd stick with the stock headers.

Third, a full TBE will be noiser depending on which one you go with. I'm running the stock catback and a 3" dp and I'm happy with it, and my numbers are doing fine as well.

Forget the gas milage on this car, this car gets the same gas milage of an SL-65. I'm getting about 220 freeway, but take into account I play with the turbo sometimes.

HarlanPepper · 02-11-2008, 06:56 PM

someone asked what a completely stock STI does on the GST dyno... here's my '04:

98ss · 02-12-2008, 08:30 AM

That's impressive for a stock 04.
But I think 04 probably have the most aggressive tune of all the USDM STi.
Stock 04 was tested in the 1/4 to be around 12.8 if I remember.
Good numbers.

98ss · 05-22-2008, 05:08 PM

Here is the latest update.
Now at stage 2 (more like 1.5)

Base line: Cobb OTS stage 2, CA 91, bellmouth 3" shorty down pipe with high flow cat. Prodrive last cat delete pipe. Stock cat back exhaust. (I am in CA, I need the sleeper look) OEM BCS.
Test: Same as above but with GM BCS and protune by Mike.

So I was almost 300 ft-lb in the end.
You will notice that just a DP and Cobb OTS stage 2 doesn't add any more power than Cobb OTS stage 1. That is because max boost was at 18 PSI, while stage 1 I was just 0.5 PSI less.

Protune is at 20.4 PSI max taper to 17 PSI? Don't recall exactly.
My injectors are maxed at 95% duty.
This is all on crap CA91 gas from a no-name gas station, USA gas?
I want to tune for worst case condition.

Next step, any suggestion on what I can do to get the torque to spread to upper RPM more, thus gain more HP?
Would love to hold 300 ft-lb from 3400 ~ 5800 RPM.
I wonder if the stock VF39 can hold 20 PSI to redline, would've love that. But I think I will for sure need larger injector and maybe pump.
For now I am relearning how to drive this car again. Very happy with the results... for now.

importfanatic17 · 05-22-2008, 05:14 PM

Quote:

Originally Posted by 98ss

Here is the latest update.
Not at stage 2 (more like 1.5)

That is pretty good for not even Stage 2. My Stage 2 at GST with a GReddy Evo 2 and catless TiTek dp netted me 262hp and 299tq.

02-06-2008, 08:50 AM	#1
98ss Junior STI Driver Posts: 97 Join Date: Oct 2005 Trader Rating: (2)	05 STI dyno at GST What do you guys think? # are kinda low because car is mostly stock. This is a 05 STI with 20k miles on it. Only mod is a driveshaft and Cobb APV2. Running the Cobb Stage 1 CA gas OTS map. I see max around mid 17 psi boost. Compare to some of you, this is small fry. But I thought I'd post it as when I was looking, it was nearly impossible to find stock and mildly stock car dyno curves. Thanks to Mike at GST for the baseline. He kindly talked me out of a protune. Honest guy. This ad is not endorsed by this member. Please register or login to hide this ad.

02-06-2008, 08:51 AM	#2
STI_Mike S204 Racer Car: 05 Aspen White STI Fav Mod: Defi Gauges Location: Laguna Niguel,Ca Posts: 2,920 Join Date: Jul 2006 Trader Rating: (4)	Re: 05 STI dyno at GST good numbers you should have gotten a few move MODS like a TBE and you could have gotten better numbers.

02-06-2008, 08:57 AM	#3
chaos311clarity STI Guru Car: 05 CGM STi Fav Mod: grip. Location: Southeastern PA Posts: 5,577 Join Date: Aug 2006 Trader Rating: (7)	Re: 05 STI dyno at GST what does a stock STi do on that dyno?

02-07-2008, 04:04 PM	#4
oce420 Professional STI Racer Car: 2005 WRX STi Fav Mod: stock clutch Location: north o.c. Posts: 725 Join Date: Aug 2004 Trader Rating: (4)	Re: 05 STI dyno at GST good #s

02-07-2008, 06:06 PM	#5
Peleg STI Guru Car: 04 Subaru WRX STi Fav Mod: Whooshing sounds Location: NorCal Posts: 5,797 Join Date: Nov 2003 Trader Rating: (11)	Re: 05 STI dyno at GST Typical #'s for stage 1. (no sarcasem) With turboback or a downpipe, fuel pump, intake you can see more.

02-07-2008, 10:54 PM	#6
rev_happy_sti Grassroots STI Racer Location: Bay Area, Ca Posts: 598 Join Date: May 2004 Trader Rating: (0)	Re: 05 STI dyno at GST Mikes the man! Yea stock you cant really get much more. Heres my stage2 graph done at GST if you want to compare it, mods are in my sig:

02-08-2008, 07:30 PM	#8
JT's06sti Senior STI Driver Car: 06 sti Fav Mod: METH!!!! Location: Derry, PA Posts: 364 Join Date: Jun 2006 Trader Rating: (5)	Re: 05 STI dyno at GST those a/f look alittle rich arent they??? thats as safe as it gets...10.5...prolly coulda squeezed alittle more outta it leaning alittle? am i wrong?

02-11-2008, 08:34 AM	#10
98ss Junior STI Driver Posts: 97 Join Date: Oct 2005 Trader Rating: (2)	Re: 05 STI dyno at GST Yes I think the AF is a little rich. Questions is do I want to spend the extra money to get the AF more leaner and maybe a few more HP or do I rather wait to do the exhaust and do a tune together. Hard choice. I know everyone said to get a 3" turbo back exhaust. Problem is how is the response when I am not in boost. 70% of the time I am not in boost and if a 3" is going to force me into boost to overtake, then it would suck in the long run. Has anyone dyno their car at GST with smaller than 3"? Let's say 2.5" or 60mm turbo back exhaust? Also with CAT?

02-11-2008, 06:56 PM	#12
HarlanPepper Professional STI Racer Car: 04 Subaru WRX STi Fav Mod: ACPT driveshaft Location: Happy Valley Posts: 758 Join Date: Oct 2003 Trader Rating: (1)	Re: 05 STI dyno at GST someone asked what a completely stock STI does on the GST dyno... here's my '04:

02-12-2008, 08:30 AM	#13
98ss Junior STI Driver Posts: 97 Join Date: Oct 2005 Trader Rating: (2)	Re: 05 STI dyno at GST That's impressive for a stock 04. But I think 04 probably have the most aggressive tune of all the USDM STi. Stock 04 was tested in the 1/4 to be around 12.8 if I remember. Good numbers.

05-22-2008, 05:08 PM	#14
98ss Junior STI Driver Posts: 97 Join Date: Oct 2005 Trader Rating: (2)	Re: 05 STI dyno at GST Here is the latest update. Now at stage 2 (more like 1.5) Base line: Cobb OTS stage 2, CA 91, bellmouth 3" shorty down pipe with high flow cat. Prodrive last cat delete pipe. Stock cat back exhaust. (I am in CA, I need the sleeper look) OEM BCS. Test: Same as above but with GM BCS and protune by Mike. So I was almost 300 ft-lb in the end. You will notice that just a DP and Cobb OTS stage 2 doesn't add any more power than Cobb OTS stage 1. That is because max boost was at 18 PSI, while stage 1 I was just 0.5 PSI less. Protune is at 20.4 PSI max taper to 17 PSI? Don't recall exactly. My injectors are maxed at 95% duty. This is all on crap CA91 gas from a no-name gas station, USA gas? I want to tune for worst case condition. Next step, any suggestion on what I can do to get the torque to spread to upper RPM more, thus gain more HP? Would love to hold 300 ft-lb from 3400 ~ 5800 RPM. I wonder if the stock VF39 can hold 20 PSI to redline, would've love that. But I think I will for sure need larger injector and maybe pump. For now I am relearning how to drive this car again. Very happy with the results... for now. Last edited by 98ss : 06-04-2008 at 09:26 PM.