Welcome to the North American Subaru Impreza Owners Club Wednesday July 18, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 08-22-2008, 02:04 PM   #1
[email protected]
Scooby Newbie
 
Member#: 182795
Join Date: Jun 2008
Default Cobb Tuned 08 STI 20G...tests 375HP 399TQ

STOCK STI- 205 HP 242 TQ(a stock sti can have up to 225HP/250TQ)
20G+ Stg2 94Oct(22.5PSI)- 343HP 342TQ
20G+Meth+Stg2(24PSI)-375HP 399TQ
(highest run was380/409TQ)

2008 STI
MUSTANG DYNO
FP 20G TD06 8cm
Aquamist HFS5
70/30mix....2JETS at TOP,near firewall on TMIC(first test...next will be one jet at thrtl. bdy and top to see which setup is more effective)
Cobb DP-Catted
Perrin Catback-Cobb Tips
Walbro
DW740s
HKS EVC
Cobb SF Intake and Box
(Prototype)
Cobb BOV (Prototype)
Synapse EWG

This is actually my car, and Iwanted to test the efficacy of various meth jet placements. This is the first iteration of testing with the jets at the top of the TMIC near the firewall. The next will be split, one at the top and one at the throttle body....we will see . Overall I think the car did quite well. It is running 14deg peak TQ tapering up to 25deg towards redline and seems very happy, so I think I can push it a bit more, but I will wait for the clutch install. I really want to push to 26PSI, but at this altitude, the turbo is having a really hard time. I am curious to see what the differing jet placements will do in relation to detonation supression.

Once I build the motor, we will go with a Rotated 35R setup and Speed Density.... then we will see what she can really do.

On a side note, I am still tracking the fuelling/hesitation issue with these 08 STIs. I think there is a direct correlation between this issue and the OL/CL fuelling... or something related to the new Suby fuel system setup. Maybe it can't keep up with bigger inj/pump as effectively as the old one. This is very early speculation, so don't hold me to that.

Thanks for looking.

John Shafer
Calibrator, Cobb Tuning
* Registered users of the site do not see these ads.
John@Cobb is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-22-2008, 02:18 PM   #2
boostdog
Scooby Specialist
 
Member#: 149752
Join Date: May 2007
Location: NW Arkansas
Vehicle:
2017 wrx
ICE ICE BABY SILVER!

Default

nice #'s john...i bet it's a blast to drive! Keep us posted as it progresses.
boostdog is offline   Reply With Quote
Old 08-22-2008, 08:15 PM   #3
godforbid67
Scooby Specialist
 
Member#: 137168
Join Date: Jan 2007
Chapter/Region: South East
Location: ummm..... Andrewtech ftmfw!
Vehicle:
06 Built SGM WRX
35r, PPG, 280's, PSS9.

Default

nice!
godforbid67 is offline   Reply With Quote
Old 08-22-2008, 08:56 PM   #4
karmasi16
Scooby Specialist
 
Member#: 145243
Join Date: Apr 2007
Chapter/Region: SCIC
Location: Burbank
Vehicle:
2006 wrx wagon
Urban Gray Metallic

Default

that is some good numbers
karmasi16 is offline   Reply With Quote
Old 08-23-2008, 12:46 AM   #5
Phatron
Scooby Guru
 
Member#: 36033
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Tuning Lab
Vehicle:
CEO PhatBottiTuning
2006 STi GTX3582 + Meth

Default

seems like the obvious answer would be 2 jets on the intercooler and one on the throttle body, no?

putting just one jet at the back of the interooler is going to limit the spray pattern of the meth inside the intercooler.

consider adding this to your test bed......1 huge jet, no intercooler

no intercooler = no heat soak.......at least thats what everyone on here says

and for those that are gonna say that the intercooler piping is still there and will heat soak, then i agree. I have been told a gagillion times by tuners/shops that the intercooler piping sitting above the turbo doesnt effect the temp of the air in the pipe.

prove it!
Phatron is offline   Reply With Quote
Old 08-23-2008, 08:52 AM   #6
mapleleaf
Scooby Specialist
 
Member#: 103399
Join Date: Dec 2005
Chapter/Region: E. Canada
Location: Halifax, Nova Scotia
Vehicle:
2009 Stripped STI
Dirty White

Default

I found that 1 large jet tapped below the opening of the IC where it connects to the TB gave me the best results.
Do you think running one at the back of the IC as well would make that much of a difference?
mapleleaf is offline   Reply With Quote
Old 08-23-2008, 09:50 AM   #7
Innovative Tuning
Former Vendor
 
Member#: 67958
Join Date: Aug 2004
Chapter/Region: Tri-State
Location: www.InnovativeTuning.com
Vehicle:
MY96 Time Attack
and 06 STI daily

Default

Quote:
Originally Posted by [email protected] View Post
Once I build the motor, we will go with a Rotated 35R setup and Speed Density.... then we will see what she can really do.

John Shafer
Calibrator, Cobb Tuning
You're from Cobb and you just said Speed Density, so you have my attention. Care to elaborate?

Last edited by Innovative Tuning; 08-23-2008 at 11:26 AM.
Innovative Tuning is offline   Reply With Quote
Old 08-23-2008, 10:32 AM   #8
cellgeek101
Scooby Specialist
 
Member#: 143941
Join Date: Mar 2007
Chapter/Region: NESIC
Location: Hartford, CT
Vehicle:
04 STI JBP
07 LIMITED #602/ 06 BUSA

Default

Quote:
Originally Posted by Innovative Tuning View Post
You're from Cobb and you just said Speed Density, so you have my attention. Care to elaborate?
I noticed that as well
cellgeek101 is offline   Reply With Quote
Old 08-23-2008, 01:10 PM   #9
RedlineFl
Scooby Newbie
 
Member#: 99842
Join Date: Nov 2005
Chapter/Region: South East
Location: Jax, FL
Default

Quote:
Originally Posted by Innovative Tuning View Post
You're from Cobb and you just said Speed Density, so you have my attention. Care to elaborate?
TXS FTW!!
RedlineFl is offline   Reply With Quote
Old 08-23-2008, 03:16 PM   #10
Innovative Tuning
Former Vendor
 
Member#: 67958
Join Date: Aug 2004
Chapter/Region: Tri-State
Location: www.InnovativeTuning.com
Vehicle:
MY96 Time Attack
and 06 STI daily

Default

I guess I should read the Cobb Forum more often...

BTW...if you're feeling brave:


GT35R, no IC, 1 nozzle pre-turbo, 1 post turbo. It worked great at 33 psi on a stock engine. At 41ish psi the stock engine didn't like it so much LOL.
Innovative Tuning is offline   Reply With Quote
Old 08-23-2008, 03:21 PM   #11
bklynpanman
Scooby Newbie
 
Member#: 166450
Join Date: Dec 2007
Default

where at the top of the ic exactly. Hey john. On my 08 with stock turbo I put n the hfs-1 system. 1 jet before the throttle body. Getting tuned Monday at precision. Good decision??
bklynpanman is offline   Reply With Quote
Old 08-23-2008, 04:45 PM   #12
Badazzcr
Scooby Specialist
 
Member#: 67693
Join Date: Aug 2004
Chapter/Region: South East
Location: Atlanta,GA
Vehicle:
4 Making them
faster then anyone else.

Default

Hey John... you should place one of the meth nozzles at the compressor outlet of the turbo.


Doug
Badazzcr is offline   Reply With Quote
Old 08-23-2008, 04:51 PM   #13
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 [email protected] View Post
On a side note, I am still tracking the fuelling/hesitation issue with these 08 STIs. I think there is a direct correlation between this issue and the OL/CL fuelling... or something related to the new Suby fuel system setup. Maybe it can't keep up with bigger inj/pump as effectively as the old one. This is very early speculation, so don't hold me to that.

Thanks for looking.

John Shafer
Calibrator, Cobb Tuning
Are you getting odd fueling and hesitation in the 2800-3200 rpm region at light to medium load? I've experienced the same thing on our 08 STi with a GT35R. I've looked at just about everything I can think of (MAF scaling, OL/CL transitions, AVCS, timing) and while it is better than at first, it still isn't buttery smooth. Everywhere else in the rpm band and at various loads the car drive fantastically. I've talked to a couple other tuners and they have been stumped as well.
socalLGT is offline   Reply With Quote
Old 08-23-2008, 08:07 PM   #14
Junior2JZ
Scooby Guru
 
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies all over
Vehicle:
10.8 [email protected] GR+
9.1/157mph 2015 STI

Default

Quote:
Originally Posted by Innovative Tuning View Post
I guess I should read the Cobb Forum more often...

BTW...if you're feeling brave:


GT35R, no IC, 1 nozzle pre-turbo, 1 post turbo. It worked great at 33 psi on a stock engine. At 41ish psi the stock engine didn't like it so much LOL.

Ya know I did this with a "BIG" 30r/AEM s2000 . . . Worked awesome and having the AEM control all the fail safes made it even better. Made 550ish, spooled like the small 30r and most importantly pulled cleanly and cool to 9400..
Now if only I can get him to floor the car @ the track.. Pulling the internal logs after 2-3 passes shows 50-65% throttle with 120+ traps..


John From Cobb I will have my stuff to you this week. Keep up the sick work sir
Junior
Junior2JZ is offline   Reply With Quote
Old 08-24-2008, 11:52 AM   #15
Slimsti
Scooby Specialist
 
Member#: 155696
Join Date: Aug 2007
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2007 BLK STI Dom3XTR
415/405 Precision Tuning

Default

Thats some crazy #'s john.Keep up the good work man, we miss you out here in NJ.
Slimsti is offline   Reply With Quote
Old 08-24-2008, 09:21 PM   #16
sutter2k
Scooby Specialist
 
Member#: 92467
Join Date: Jul 2005
Location: Willow Grove PA
Vehicle:
08 STI
Silver

Default

In for hyperlink to bigger/readable dyno chart
sutter2k is offline   Reply With Quote
Old 08-25-2008, 03:53 AM   #17
[email protected]
Scooby Newbie
 
Member#: 182795
Join Date: Jun 2008
Default

Sorry for the late reply. Thanks for all of the positive feedback on the tune.

As far as the meth setup is concerned... I just wanted to see if the dual nozzles at the top would work out, or if my usual one in the 'Y' and one adjacent to the throttle body is really more effective. I will test the car Monday the usual way(split nozzle set up) and post the charts. Any thoughts on if the HFS 5 ShureFlo pump is up to 3 jets....2 pre-core(to cool the TMIC) and one adjacent to the throttle body

Junior...no worries. I hope everything is going well, you know if you need anything, just ask.

As far as the Speed Density comment, I will keep you updated. Trey has really been kicking a** getting this going. I am really excited to test it out when he is done. Please don't take this as a "we will have it done this week", comment. Trust me, I want this for the Subies and Evo's as much as you do...maybe more..LOL I will announce the beta version here as soon as I have one for testing.

The 08 does have that awful hesitation at 2800 -3000RPM.....and it gets worse with bigger injectors. I have actually burned out 2 Walbro fuel pumps on this car too. I have been able to get rid of most of the hesitation. You guys are on the right track.....I worked with the Throttle/OL-CL,Scalar, Latencies and MAF tables to get this ironed out. I would be more than happy to work with any of the tuners to get them going with base calibrations/techniques to help alleviate this.

-John

....Access Tuner Race coming very soon too
John@Cobb is offline   Reply With Quote
Old 08-25-2008, 07:59 AM   #18
White GDA
Scooby Newbie
 
Member#: 128905
Join Date: Oct 2006
Location: Trinidad and Tobago, W.I.
Vehicle:
2005 Impreza WRX

Default

Hey John, congrats on a job well done! Those are some SEEEERIOUSLY awesome numbers!

Quote:
I've looked at just about everything I can think of (MAF scaling, OL/CL transitions,
Quote:
The 08 does have that awful hesitation at 2800 -3000RPM.....and it gets worse with bigger injectors. I have actually burned out 2 Walbro fuel pumps on this car too. I have been able to get rid of most of the hesitation. You guys are on the right track.....I worked with the Throttle/OL-CL,Scalar, Latencies and MAF tables to get this ironed out.
I have a question though:

Do you suspect that there's a laggy "transition" between the OL-CL modes ?

But if so......shouldn't that transition occur higher up in the rpm range?
White GDA is offline   Reply With Quote
Old 08-25-2008, 08:35 AM   #19
IMPREZ A WRX
*** Banned ***
 
Member#: 172438
Join Date: Feb 2008
Default

my question is how can the STI have such low stock numbers?
those sound like wrx numbers.
IMPREZ A WRX is offline   Reply With Quote
Old 08-25-2008, 09:23 AM   #20
Digitalfiend
Scooby Specialist
 
Member#: 54823
Join Date: Feb 2004
Chapter/Region: E. Canada
Location: Whitby, Ontario
Vehicle:
2008 STI
DGM

Default

Quote:
Originally Posted by IMPREZ A WRX View Post
my question is how can the STI have such low stock numbers?
those sound like wrx numbers.
...and what do you think a WRX would dyno there? It's all relative.
Digitalfiend is offline   Reply With Quote
Old 08-25-2008, 10:07 AM   #21
mapleleaf
Scooby Specialist
 
Member#: 103399
Join Date: Dec 2005
Chapter/Region: E. Canada
Location: Halifax, Nova Scotia
Vehicle:
2009 Stripped STI
Dirty White

Default

Quote:
Originally Posted by IMPREZ A WRX View Post
my question is how can the STI have such low stock numbers?
those sound like wrx numbers.


Lower reading dyno and high altitude.
Why so stuck on a "number"?
mapleleaf is offline   Reply With Quote
Old 08-25-2008, 10:58 AM   #22
Chris_Lee
Scooby Specialist
 
Member#: 110667
Join Date: Mar 2006
Chapter/Region: MAIC
Location: Chesapeake, VA
Vehicle:
2006 WRX

Default

Quote:
Originally Posted by IMPREZ A WRX View Post
my question is how can the STI have such low stock numbers?
those sound like wrx numbers.
It's a mustang dyno.
Chris_Lee is offline   Reply With Quote
Old 08-25-2008, 12:52 PM   #23
hetsaq
Scooby Newbie
 
Member#: 63572
Join Date: Jun 2004
Chapter/Region: RMIC
Location: Sugarhouse, UT
Default

Nice work John, I need you to have a look at my car soon!
hetsaq is offline   Reply With Quote
Old 08-25-2008, 01:50 PM   #24
White GDA
Scooby Newbie
 
Member#: 128905
Join Date: Oct 2006
Location: Trinidad and Tobago, W.I.
Vehicle:
2005 Impreza WRX

Default

Quote:
Originally Posted by IMPREZ A WRX View Post
my question is how can the STI have such low stock numbers?
those sound like wrx numbers.

Well, IIRC, haven't guys put out 160-165 whp on a stock GD WRX on the Mustang dyno?

That dyno is harrrrsssshhhhh y0!!!
White GDA is offline   Reply With Quote
Old 08-25-2008, 02:36 PM   #25
SuperSTI
Scooby Specialist
 
Member#: 67182
Join Date: Jul 2004
Vehicle:
2004 Subaru STi
11.0 @ 128mph - 93/Meth

Default

when do you expect release of speed density?
SuperSTI 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
TMP 08 STI winter test GT42RR Motorsports 4 01-12-2010 01:46 PM
08 STI - 20G & E85 - Red and rippin Kastley85891 Member's Car Gallery 63 02-22-2009 03:30 PM
Need an 08+ STI to test TMIC fitment CSS Performance MAIC Vendor Classifieds 1 01-04-2009 03:51 AM
Car and Driver - 08 STI full test rallyblues News & Rumors 161 01-04-2008 11:53 PM
COBB Tuning - vehicles needed for testing... ibis Rocky Mountains Impreza Club Forum -- RMIC 24 12-19-2007 06:08 PM

All times are GMT -4. The time now is 01:13 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.