06 WRX 20G vs 04 STi VF-39

blinguskahn · 03-18-2006, 02:06 AM

My 06 Wagon:

278HP/286TQ
FP20G
Helix Catted DP
Spearco TMIC
Walbro Fuel Pump

Friend's 04 STi:

254HP/263TQ
TXS DP
TXS stealthback w/Prodrive muffler
Fujitsubo Coated Equal Length Header
Helix Coated Uppipe
CF Driveshaft
AVC-R

Both were Pro-tuned at Gruppe-S by Mike.

Spool with the TD06H 20G and the 06 WRX engine is almost identical. We did a couple of highway pulls together and it was pretty much dead even. I maybe inched him a bit but barely.

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wrxtremeWGN · 03-18-2006, 02:15 AM

nice comparo!

scoobystas · 03-18-2006, 07:28 AM

sti has CF driveshaft, expensive mod, maybe why u only pull on him alittle w/20 more HP and LBS of torque.

AudiTTkiller · 03-18-2006, 07:41 AM

those numbers seem pretty low for a a 20g on a 2.5... i thought you would be well over 300 whp

akira02rex · 03-18-2006, 08:39 AM

That's what I was thinking. There was a 20G 2.0liter wagon posted in here not long ago with well over 300whp. I wanted to say around 320-340whp.

dvang · 03-18-2006, 08:42 AM

^^^its a really conservative tune with a stock catback.

im actually wondering if its the gearing?

sonic rx · 03-18-2006, 08:53 AM

it is dynoed on the gruppe-s heartbreak mustang dyno. your are lucky your numbers were not lower.

still though a 20g vs vf39 should have been a a$$ kicking.

Paul · 03-18-2006, 12:45 PM

stock cat-back is killing you

redsube' · 03-18-2006, 12:50 PM

who's does a turbo swap and keeps stock catback?

keaniegenie · 03-18-2006, 12:52 PM

Quote:

Originally Posted by akira02rex

That's what I was thinking. There was a 20G 2.0liter wagon posted in here not long ago with well over 300whp. I wanted to say around 320-340whp.

I did the same mistake when blingus first posted his graph. Things to consider...

Mustang dyno reads lower than most dynos

no catback exhaust (wanted stock look/sound)

Not a STI, hence less flowing heads and no avcs

All things considered, it's a great setup. I'm sure it's well over 300whp on another dyno, and it probably sounds almost stock! What a great sleeper.

InfamousDX · 03-18-2006, 01:07 PM

Quote:

Originally Posted by redsube'

who's does a turbo swap and keeps stock catback?

considering he has an sti with a Red... maybe he just wants a little more pep out of the car while staying quiet.

blinguskahn · 03-18-2006, 02:28 PM

Quote:

Originally Posted by InfamousDX

considering he has an sti with a Red... maybe he just wants a little more pep out of the car while staying quiet.

Thanks Infamous! Just wanted to get rid of the TD04L because, to me, it makes the 2.5L undrivable. I was pretty pleased it actually did as well as it did against my friends 04 STi on the highway. Its exactly what I wanted a stock STi and Evo KILLER (in wagon format)

.

cronic · 03-18-2006, 02:31 PM

Quote:

Originally Posted by keaniegenie

Not a STI, hence less flowing heads and no avcs

incorrect..

Nice numbers Bling, the 20g, or green is such a good match for a pure street car.

b20todaej6 · 03-18-2006, 02:33 PM

Quote:

Originally Posted by keaniegenie

Not a STI, hence less flowing heads and no avcs

if your talking about the 2.5 in the new wrx, its the exact same motor as the sti, heads, cams, avcs and all. Garage tuning did a comparison and took the motor apart, they said its identical.

reefro · 03-18-2006, 02:44 PM

I drove it the other day and I could hardly tell it was running it was so quiet... when i came to a stop i was worried i stalled it i couldn't even hear it. and then later on the highway he pulled me in my evo.. i knew it would be faster due to the numbers, but from driving it i wasn't sure because the sound factor wasn't there, it didn't SOUND fast but it scoots!

blinguskahn · 03-18-2006, 02:49 PM

Quote:

Originally Posted by b20todaej6

if your talking about the 2.5 in the new wrx, its the exact same motor as the sti, heads, cams, avcs and all. Garage tuning did a comparison and took the motor apart, they said its identical.

Incorrect.

keaniegenie · 03-18-2006, 03:43 PM

Alright. Let's clarify then. Is the WRX motor identical to the STI minus the intercooler and turbo? Block and heads are the same? I haven't heard that one before.

keaniegenie · 03-18-2006, 03:59 PM

Quote:

Originally Posted by cronic

incorrect..

Nice numbers Bling, the 20g, or green is such a good match for a pure street car.

You say it's incorrect, then what's correct?

blinguskahn · 03-18-2006, 04:03 PM

Quote:

Originally Posted by keaniegenie

You say it's incorrect, then what's correct?

Did you notice that the WRX has higher compression?

WRXDriftR · 03-18-2006, 04:05 PM

the boxer sound is the best part... i know you have reasons, but id never keep the stock sound

blinguskahn · 03-18-2006, 07:44 PM

Quote:

Originally Posted by WRXDriftR

the boxer sound is the best part... i know you have reasons, but id never keep the stock sound

I understand but my STi is loud enough for both cars

Plus you know how satisfying it is to roll up to an SVT cobra with a loud exhaust and smoke him without him hearing anything while he is looking at my tail lights?
Priceless!

john banks · 03-19-2006, 07:26 AM

Nice thread, nice results.

I really like the minimal/stealth/quiet approach and you've targeted the necessary stuff only and got good results.

Can I confirm this is stock induction, stock 2nd cat?

What sort of boost profile?

WRC51 · 03-19-2006, 09:07 AM

Quote:

Originally Posted by blinguskahn

Incorrect.

I thought the differences between the 06 STI & 06 WRX motors were the heads/turbo/intercooler. Same block?

Can somone who knows for sure answer?

MARKGSTI · 03-19-2006, 10:06 AM

I would of thought the wagon would of pullled on the STI alittle....uh.

Maybe the gearing?

Good thread

john banks · 03-19-2006, 11:28 AM

Long block: As I understand it, the pistons have a different dish, the heads a different combustion space and passages for the air pump. Crank, rods, valves, cams, valvetrain the same to my knowledge.

In terms of the external bits: injectors, TMIC, turbo, intercooler, air pump, ECU.

03-18-2006, 02:06 AM	#1
blinguskahn Scooby Specialist Member#: 39301 Join Date: Jul 2003 Chapter/Region: BAIC Location: The Haystack Vehicle: STi 05 8cm FPRed WRX 06 Blue FP20G	06 WRX 20G vs 04 STi VF-39 My 06 Wagon: 278HP/286TQ FP20G Helix Catted DP Spearco TMIC Walbro Fuel Pump Friend's 04 STi: 254HP/263TQ TXS DP TXS stealthback w/Prodrive muffler Fujitsubo Coated Equal Length Header Helix Coated Uppipe CF Driveshaft AVC-R Both were Pro-tuned at Gruppe-S by Mike. Spool with the TD06H 20G and the 06 WRX engine is almost identical. We did a couple of highway pulls together and it was pretty much dead even. I maybe inched him a bit but barely. * Registered users of the site do not see these ads.

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03-18-2006, 02:15 AM	#2
wrxtremeWGN Scooby Specialist Member#: 12281 Join Date: Nov 2001 Chapter/Region: Tri-State Location: Stony Brook, NY Vehicle: 08 FSXT Tiger's Blood	nice comparo!

03-18-2006, 07:28 AM	#3
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03-18-2006, 07:41 AM	#4
AudiTTkiller Scooby Specialist Member#: 72875 Join Date: Oct 2004 Chapter/Region: E. Canada Location: montreal Vehicle: 2004 W R X platinum silver metallic	those numbers seem pretty low for a a 20g on a 2.5... i thought you would be well over 300 whp

03-18-2006, 08:39 AM	#5
akira02rex Scooby Specialist Member#: 82612 Join Date: Mar 2005 Chapter/Region: MWSOC Vehicle: 2015 WRX STI Ice Silver Metallic	That's what I was thinking. There was a 20G 2.0liter wagon posted in here not long ago with well over 300whp. I wanted to say around 320-340whp.

03-18-2006, 08:42 AM	#6
dvang Scooby Specialist Member#: 84188 Join Date: Mar 2005 Chapter/Region: MWSOC Location: its too cold Vehicle: 05 legacy caravan full of kids now	^^^its a really conservative tune with a stock catback. im actually wondering if its the gearing?

03-18-2006, 08:53 AM	#7
sonic rx Scooby Specialist Member#: 33457 Join Date: Feb 2003 Chapter/Region: PRSIC Location: 430 whp & 400 wtq 22 psi 93oct Vehicle: HAHA EVERYONE KNOWS DYNO JET IS NOT REAL WHP	it is dynoed on the gruppe-s heartbreak mustang dyno. your are lucky your numbers were not lower. still though a 20g vs vf39 should have been a a$$ kicking.

03-18-2006, 12:45 PM	#8
Paul Scooby Guru Member#: 56203 Join Date: Feb 2004 Chapter/Region: Tri-State Location: south nj Vehicle: 00 RSTI Coupe Twin Scroll 2.5XTR EJ207	stock cat-back is killing you

03-18-2006, 12:50 PM	#9
redsube' Scooby Newbie Member#: 48942 Join Date: Nov 2003	who's does a turbo swap and keeps stock catback?

03-18-2006, 02:44 PM	#15
reefro Scooby Newbie Member#: 51215 Join Date: Dec 2003 Vehicle: 2003 evo 8	I drove it the other day and I could hardly tell it was running it was so quiet... when i came to a stop i was worried i stalled it i couldn't even hear it. and then later on the highway he pulled me in my evo.. i knew it would be faster due to the numbers, but from driving it i wasn't sure because the sound factor wasn't there, it didn't SOUND fast but it scoots!

03-18-2006, 03:43 PM	#17
keaniegenie Scooby Specialist Member#: 94494 Join Date: Aug 2005 Chapter/Region: NWIC Location: Seattle Vehicle: 2005 Element 92x Black	Alright. Let's clarify then. Is the WRX motor identical to the STI minus the intercooler and turbo? Block and heads are the same? I haven't heard that one before.

03-18-2006, 04:05 PM	#20
WRXDriftR Scooby Guru Member#: 65065 Join Date: Jun 2004 Chapter/Region: Tri-State Location: NJ Vehicle: 2004 EJ205 STi 2007 Forester STi	the boxer sound is the best part... i know you have reasons, but id never keep the stock sound

03-19-2006, 07:26 AM	#22
john banks Scooby Specialist Member#: 11669 Join Date: Oct 2001 Location: UK Vehicle: Evo IX 345 WHP	Nice thread, nice results. I really like the minimal/stealth/quiet approach and you've targeted the necessary stuff only and got good results. Can I confirm this is stock induction, stock 2nd cat? What sort of boost profile?

03-19-2006, 10:06 AM	#24
MARKGSTI Scooby Specialist Member#: 70197 Join Date: Sep 2004	I would of thought the wagon would of pullled on the STI alittle....uh. Maybe the gearing? Good thread

03-19-2006, 11:28 AM	#25
john banks Scooby Specialist Member#: 11669 Join Date: Oct 2001 Location: UK Vehicle: Evo IX 345 WHP	Long block: As I understand it, the pistons have a different dish, the heads a different combustion space and passages for the air pump. Crank, rods, valves, cams, valvetrain the same to my knowledge. In terms of the external bits: injectors, TMIC, turbo, intercooler, air pump, ECU.