Welcome to the North American Subaru Impreza Owners Club Sunday May 3, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Proven Power Bragging

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 05-01-2009, 12:24 AM   #1
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default high compression 35r sti!

07 sti.
ar fab built shortblock with 9.5:1 arias pistons, manley rods and blueprinted bottom end.
stock heads and cams.
modified u.r. gt3582r kit with .82 a/r v-band discharge turbine.
tial 44 with 1.4 bar springs.
maddad v2 header and whisper catback.
perrin fmic.
deatschwerks 1,150cc top feeds.
boomba racing fuel rails, fuelab regulator and walbro 255.
4" filter on turbo inlet.
hydra 2.6.
tgv deletes.

93 octane pump tune is at 21 psi.

93 pump + 5 gallons Q16 race tune (roughly 40/60 mix) was at 28 psi. 26 psi still netted 500 whp.

more power was on the table, but we wanted to stay on the safe side and not worry about lifting the heads with the high compression. aldo idc's peaked at 98.8% so they are pretty much done.

correcting for weather, my math says 419 whp on pump and 539 whp on race gas.

big thanks to paul, jorge, and the rest of the guys at p&l!


* Registered users of the site do not see these ads.

Last edited by n2oiroc; 05-01-2009 at 04:22 AM.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 12:26 AM   #2
ahendrickson
Scooby Specialist
 
Member#: 164625
Join Date: Nov 2007
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2007 WRX Wagon 20g
External Wastegate

Default

Throw some meth on there and run full race gas at like 29psi. Then that is a godly car. And work the heads.
ahendrickson is offline   Reply With Quote
Old 05-01-2009, 12:28 AM   #3
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by ahendrickson View Post
Throw some meth on there and run full race gas at like 29psi. Then that is a godly car. And work the heads.
i would love some cams at minimum, but im broke now!
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 12:31 AM   #4
ahendrickson
Scooby Specialist
 
Member#: 164625
Join Date: Nov 2007
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2007 WRX Wagon 20g
External Wastegate

Default

Haha I hear ya, thats why im selling my car and starting fresh.
ahendrickson is offline   Reply With Quote
Old 05-01-2009, 11:50 AM   #5
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Wow, he left her a little leaner up top.

me like.
modaddict is offline   Reply With Quote
Old 05-01-2009, 11:52 AM   #6
unclemat
Scooby Specialist
 
Member#: 114530
Join Date: May 2006
Chapter/Region: NESIC
Location: MA
Vehicle:
2005 LGT 6MT wagon

Default

Hmmm, isn't peak torque coming really late? There bunch of dynos of 35R with stock compression and stock cams reaching peak torque before 4500 rpm....

Dyno might not be telling the whole story I guess. How is the transient response and power down low with the upped compression?
unclemat is offline   Reply With Quote
Old 05-01-2009, 01:03 PM   #7
DoctorNick
Scooby Guru
 
Member#: 7022
Join Date: May 2001
Vehicle:
heh, DC ITCA are
my rides

Default

Whats with the dip around 5100? Pretty nice for a stock head/cam car! Throttle response has gotta be nice.
DoctorNick is offline   Reply With Quote
Old 05-01-2009, 01:16 PM   #8
Steve.804
Scooby Specialist
 
Member#: 68647
Join Date: Aug 2004
Chapter/Region: MAIC
Location: Richmond, VA
Vehicle:
07 STI
Rotated 35R Jorge Tuned

Default

^yeah he did! Looks like a very nice powerband. Congrats!
Steve.804 is offline   Reply With Quote
Old 05-01-2009, 02:11 PM   #9
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by unclemat View Post
Hmmm, isn't peak torque coming really late? There bunch of dynos of 35R with stock compression and stock cams reaching peak torque before 4500 rpm....

Dyno might not be telling the whole story I guess. How is the transient response and power down low with the upped compression?
looking around at other 35r's i dont think mine comes in late at all. some are a little quicker, some are slower. transient response isnt much different, but power off boost is noticeably better,
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 02:16 PM   #10
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by DoctorNick View Post
Whats with the dip around 5100? Pretty nice for a stock head/cam car! Throttle response has gotta be nice.
im not totally sure, but he tried tuning that out and it started out a lot worse. with the high compression, it wanted to detonate around there so it might be left soft intentionally. he also is respectful of my time and money. these setups take a long time to tune and it gets rather expensive at $200/hr. im no master tuner, but i can take the time to tweak and smooth things out if i choose, but as of now, the car runs and drives great. no complaints!
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 02:18 PM   #11
TopSpeed
NASIOC Vendor
 
Member#: 78884
Join Date: Jan 2005
Location: Alpharetta, GA
Vehicle:
Go faster
at TopSpeed

Default

Is the hydra controlling boost?
TopSpeed is offline   Reply With Quote
Old 05-01-2009, 02:18 PM   #12
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by modaddict View Post
Wow, he left her a little leaner up top.

me like.
also intentionally. the stock cams (and i think my cat-back) were starting to choke things off up there, running leaner it held much better.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 02:19 PM   #13
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by TopSpeed View Post
Is the hydra controlling boost?
yep, hydra is running a perrin ebcs.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 04:04 PM   #14
socalLGT
Scooby Specialist
 
Member#: 89752
Join Date: Jun 2005
Chapter/Region: SCIC
Location: On the dyno at Yimi Sport
Vehicle:
08 STI
SWP

Default

Quote:
Originally Posted by n2oiroc View Post
yep, hydra is running a perrin ebcs.
Wow... Jorge must be a glutton for punishment Using the Hydra to control boost is a PITA and judging from the dyno chart, boost control is not as accurate as some might like to see.

As for the high compression, I fail to see any benefits in this application. Especially on pump gas, I'm seeing less power and torque than you'd have with standard compression and no gain at all in boost threshold. I for one wouldn't spend the money to gain a bit of off-boost power while simultaneously loosing power where it really count (on-boost).
socalLGT is offline   Reply With Quote
Old 05-01-2009, 06:15 PM   #15
moorebl
Scooby Specialist
 
Member#: 59238
Join Date: Apr 2004
Chapter/Region: SWIC
Default

nice setup. i too have a AR FAB build. i just changed my setup and went with a ur setup with a precision 6262 billet turbo. when the turbo get in i will be at work soon and get my car to element for some hydra tunning. what oil are you running.
moorebl is offline   Reply With Quote
Old 05-01-2009, 06:34 PM   #16
unclemat
Scooby Specialist
 
Member#: 114530
Join Date: May 2006
Chapter/Region: NESIC
Location: MA
Vehicle:
2005 LGT 6MT wagon

Default

Quote:
Originally Posted by socalLGT View Post
As for the high compression, I fail to see any benefits in this application. Especially on pump gas, I'm seeing less power and torque than you'd have with standard compression and no gain at all in boost threshold. I for one wouldn't spend the money to gain a bit of off-boost power while simultaneously loosing power where it really count (on-boost).
Yeah, my thinking... seems high compression could be beneficial with a smaller turbo that cannot be produce much boost anyway, but with a big turbo than can move a lot of air at high boost, it seems counterproductive...

But what do I know...
unclemat is offline   Reply With Quote
Old 05-01-2009, 09:43 PM   #17
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by socalLGT View Post
Wow... Jorge must be a glutton for punishment Using the Hydra to control boost is a PITA and judging from the dyno chart, boost control is not as accurate as some might like to see.

As for the high compression, I fail to see any benefits in this application. Especially on pump gas, I'm seeing less power and torque than you'd have with standard compression and no gain at all in boost threshold. I for one wouldn't spend the money to gain a bit of off-boost power while simultaneously loosing power where it really count (on-boost).
less power and torque? do you hang out at p&l and watch them dyno 35r's all day long? power is right where it should be and the motor didnt cost anymore than a low compression motor. as far as the boost threshold, i have things slowing it down a bit unrelated to the compression.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 09:44 PM   #18
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by unclemat View Post
Yeah, my thinking... seems high compression could be beneficial with a smaller turbo that cannot be produce much boost anyway, but with a big turbo than can move a lot of air at high boost, it seems counterproductive...

But what do I know...
tell that to all the time attack guys running 10:1 motors and 35r's.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 10:18 PM   #19
unclemat
Scooby Specialist
 
Member#: 114530
Join Date: May 2006
Chapter/Region: NESIC
Location: MA
Vehicle:
2005 LGT 6MT wagon

Default

Not hating. In fact I'd love to get a ride in turbo Subaru with higher comp. motor. Curious how it feels off-boost.
unclemat is offline   Reply With Quote
Old 05-01-2009, 10:21 PM   #20
n2oiroc
Scooby Specialist
 
Member#: 141952
Join Date: Feb 2007
Chapter/Region: MWSOC
Location: milwaukee, wi
Vehicle:
03 11 wrx/13 brz

Default

Quote:
Originally Posted by unclemat View Post
Not hating. In fact I'd love to get a ride in turbo Subaru with higher comp. motor. Curious how it feels off-boost.
its noticeably better off boost, but people really exaggerate the differences. nothing is night and day different from a normal motor.
n2oiroc is offline   Reply With Quote
Old 05-01-2009, 10:49 PM   #21
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
08 Corvette Z06
problem Traction?

Default

most 35r dyno's we see are making around 400 to 450 whp @ 4500 rpms if not a bit later... this car is easily making that... the dyno plot just continues to 5000 where it hits 500+ whp.... this car is actually right on par if you study the graph for a minute or two...

cool stuff guys..

it would be interesting to take 2 sti's with the same mods... one with the factory 8:2:1 and this car with the 9:5:1 and do a roll from 40 and see the difference
All4bSpinnin is offline   Reply With Quote
Old 05-02-2009, 12:28 AM   #22
Super Nintendo
Scooby Specialist
 
Member#: 73721
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: Wheaton, IL
Vehicle:
2007 STI
PTE 6266

Default

Quote:
Originally Posted by ahendrickson View Post
Throw some meth on there and run full race gas at like 29psi. Then that is a godly car. And work the heads.
You do realize q16 is way higher octane than methanol right?

Quote:
Originally Posted by modaddict View Post
Wow, he left her a little leaner up top.

me like.
Lean is mean.

Quote:
Originally Posted by DoctorNick View Post
Whats with the dip around 5100? Pretty nice for a stock head/cam car! Throttle response has gotta be nice.
Id say it's not a "det" dip and more of an issue with the set up controlling boost. Some systems just don't control very well and display the same hump in power followed by the dip after peak boost.

Quote:
Originally Posted by socalLGT View Post
Wow... Jorge must be a glutton for punishment Using the Hydra to control boost is a PITA and judging from the dyno chart, boost control is not as accurate as some might like to see.

As for the high compression, I fail to see any benefits in this application. Especially on pump gas, I'm seeing less power and torque than you'd have with standard compression and no gain at all in boost threshold. I for one wouldn't spend the money to gain a bit of off-boost power while simultaneously loosing power where it really count (on-boost).
I haven't seen any dyno plots with benefits of high compression. Nothing conclusive at least. The theory makes sense, but I've yet to see it in practice..
Super Nintendo is offline   Reply With Quote
Old 05-02-2009, 12:52 AM   #23
davidm_sh
Scooby Specialist
 
Member#: 5994
Join Date: Apr 2001
Location: Fort Collins, CO
Vehicle:
2004 Impreza WRX STi
Java Black

Default

I know of a few guys up here in Colorado that have run 9.5:1 compression GT35R setups with pretty good resuls. By their calculations 9.5:1 seemed to correct for the altitude compared to sea level and 8.2:1 or so. For alitude I am talking 5000-6000ft asl.
davidm_sh is offline   Reply With Quote
Old 05-02-2009, 01:21 AM   #24
Merp
*** Banned ***
 
Member#: 199106
Join Date: Jan 2009
Location: Pennsyltucky
Vehicle:
PMme 4 Speed Density
Patches on OEM ECU

Default

Quote:
Originally Posted by Super Nintendo View Post
You do realize q16 is way higher octane than methanol right?
Meth/WI isn't all about octane boosting
Merp is offline   Reply With Quote
Old 05-02-2009, 01:48 AM   #25
Super Nintendo
Scooby Specialist
 
Member#: 73721
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: Wheaton, IL
Vehicle:
2007 STI
PTE 6266

Default

Quote:
Originally Posted by Merp View Post
Meth/WI isn't all about octane boosting
Meth in Wisconsin?

Super Nintendo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cicio's 35r STi vs. 35r Evo Video CicioSTi General Community 15 07-11-2008 04:28 PM
Low Compression/High Boost vs High Compression/Low Boost? JoeTX Newbies & FAQs 31 05-18-2006 04:06 PM
High Compression STI? LIQUIDSK8S Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 11 09-30-2005 01:41 AM
What to do? High Compression, Low Boost or Low Compression, High Boost. FlooredSubaru Normally Aspirated with bolt-on Forced Induction Powertrain 6 01-29-2003 10:55 AM
Tuning hp and torque curve w/ low compression and high compression pistons FuJi K Normally Aspirated with bolt-on Forced Induction Powertrain 22 10-14-2001 07:25 PM


All times are GMT -4. The time now is 06:35 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.