Welcome to the North American Subaru Impreza Owners Club Friday November 28, 2014
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, 03:38 AM   #126
Brewhaha
Scooby Specialist
 
Member#: 180677
Join Date: May 2008
Chapter/Region: MAIC
Location: Dover, DE
Vehicle:
2009 370z 6MT
Solid Red

Default

I am glad I found this thread because I have been wanting to swap my turbo out for a vf43 since the vf39 has the WG crack (tho people say it doesn't affect it, i just dont liike the idea of cracks)... I wasn't even aware that the vf48 would bolt right up. I read around a bit and one source said you would need very slight modifications for the vf48. If I were to swap out to the vf48, what additional parts should I consider on MY06? And what numbers would I expect to see on 93 octane assuming this is a conservative tune for a daily driver like myself.
* Registered users of the site do not see these ads.
Brewhaha is offline   Reply With Quote
Old 07-05-2009, 01:35 PM   #127
shatteringstar
Scooby Specialist
 
Member#: 149604
Join Date: May 2007
Chapter/Region: MWSOC
Location: Cincinnati, Ohio
Vehicle:
2006 Limited WRX
OBP

Default

^TBE (access-port stage 2), Bigger TMIC or a FMIC, and Walbro 255 pump minimum.
a tuner will recomend bigger fuel injectors (750cc DW) and maybe even one step colder spark plugs.

u should expect ~300whp (+/- 20)

i'm getting my car tuned on July 30th...
Current mods: 06 WRX w/~20k miles
-Cobb AP v1
-Invidia V4 catted DP w/ SPT cat-back
-Cobb lightened pulley
-SPT air intake

Not installed yet:
-CSS TMIC
-VF48
-Crawford OAS
-Walbro 255

but i cant deside if larger injectors and new plugs are really going to be worth it
shatteringstar is offline   Reply With Quote
Old 07-05-2009, 02:44 PM   #128
scramjett
*** Banned ***
 
Member#: 192526
Join Date: Oct 2008
Chapter/Region: MWSOC
Vehicle:
2008 WRX FMIC/VF48
Red/Steel Grey

Default

Quote:
Originally Posted by shatteringstar View Post
^TBE (access-port stage 2), Bigger TMIC or a FMIC, and Walbro 255 pump minimum.
a tuner will recomend bigger fuel injectors (750cc DW) and maybe even one step colder spark plugs.

u should expect ~300whp (+/- 20)
Good luck, but I don't think a VF48 on pump gas and no meth will crack anything over about 300whp. Only on P&L's high reading dyno will anyone see 320whp and hold to 300whp @ 7K. Look over on IWSTI and you'll see that even with the STI's variable intake and exhaust setup (which the WRX's only have single AVCS) they are not getting 320whp on pump gas...

Not being a hater, but for the money a E316G or 68hta would be a better option. I was actually swapping out my td04 for a vf48 (with a FMIC)
but when I got into doing the work it hit me that for all of hard work I was doing on the swap that I'd be better off getting a bigger turbo since putting a smaller vf48 into my car takes the same amount of work putting in a bigger turbo. Just my $0.02!
scramjett is offline   Reply With Quote
Old 07-05-2009, 11:25 PM   #129
arch4life
Scooby Newbie
 
Member#: 172588
Join Date: Feb 2008
Location: Ann Arbor, MI
Vehicle:
2005 saab 9-2x sti
Black

Default

scramm, just so you know, dual avcs only came with the 08 and up sti. not all sti's. 04-07 sti's and 06+ wrx's have the same avcs setup.
arch4life is offline   Reply With Quote
Old 07-06-2009, 10:59 AM   #130
scramjett
*** Banned ***
 
Member#: 192526
Join Date: Oct 2008
Chapter/Region: MWSOC
Vehicle:
2008 WRX FMIC/VF48
Red/Steel Grey

Default

Quote:
Originally Posted by arch4life View Post
scramm, just so you know, dual avcs only came with the 08 and up sti. not all sti's. 04-07 sti's and 06+ wrx's have the same avcs setup.

I was really only commenting on the 2008+ STI's on the IWSTI Proven Power forum since the VF48 is only on 08+ STI's... With the 08+ STI's dual variable timing on intake and exhaust I've not seen a dyno over there crack 305whp on only pump gas.

Again, not trying to be a hater... I myself bought into the hype of the VF48 and bought one and its still in my garage. I've done a complete 180 on this turbo... I have not seen any dyno's of VF48 cars from anyone else other than P&L on this site. And those P&L dyno's are damned close to plots of TD05 20G cars from other tuner shops with similar setups/mods/dyno eqpmt.

I just don't think it serves our website comunity any good to hype up this turbo, which is a fine turbo, to being more than what it is. Hell, look at the P&L dyo plots on the 48's and it looks like 68HTA plots... holding something like 225wtq and 300whp to 7K... No way that is possible on the 48... not with what it flows. Thats why people are jumping onto the 68HTA bandwagon: to hold that kind of power to redline+. Go over to the Perrin site where they install a FMIC on an 08 STI and even with the extra cooling, the car does not hold power like is shown in all of the P&L plots. Where there's smoke there's fire and those P&L plots are giving out a lot of smoke. The only before and after plots I've seen from P&L have the stock unmodded power/torque #'s a lot higher than any other stock dynos. That tells me their dyno reads high when every other dyno comes back lower on stock cars.
scramjett is offline   Reply With Quote
Old 07-06-2009, 12:16 PM   #131
cathode
Scooby Newbie
 
Member#: 120684
Join Date: Jul 2006
Chapter/Region: Tri-State
Location: Maplejerz
Vehicle:
08 Honda Acura RDX
I want a Fiesta ST

Default

My VF48 is finally going in 7/25, along with a Walbro 255.

It's getting tuned on EFI Logics' heartbreaker Mustang, though, so numbers won't be too impressive. I'll post up the results.

shatteringstar, we have very similar setups, the results should be interesting.

I have:
SPT intake
Turbo XS TMIC
Titek catted DP
HKS catback

I'm sticking with stock injectors and plugs. I'm going for a safe tune, don't want to grenade third gear just be able to pull hard through redline. I'm so tired of the TD04 running out of breath.

Last edited by cathode; 07-06-2009 at 12:23 PM.
cathode is offline   Reply With Quote
Old 07-06-2009, 10:34 PM   #132
subaru fan
Scooby Specialist
 
Member#: 127910
Join Date: Oct 2006
Chapter/Region: SCIC
Location: corona C.A
Vehicle:
04 STI silver
Silver

Default

Is it really worth to go from vf39 to A 48 on a Sti or just go 20g . I am just looking for over 300 whp and 320 tq iam not going to be doing meth just bigger injectors fuel pump bigger tmic and port and polish some stuff now the numbers I could make fr the 20g and 48 is there a big difference because a 1300 20g sure is alot
subaru fan is offline   Reply With Quote
Old 07-07-2009, 11:04 AM   #133
cathode
Scooby Newbie
 
Member#: 120684
Join Date: Jul 2006
Chapter/Region: Tri-State
Location: Maplejerz
Vehicle:
08 Honda Acura RDX
I want a Fiesta ST

Default

Quote:
Originally Posted by subaru fan View Post
Is it really worth to go from vf39 to A 48 on a Sti or just go 20g . I am just looking for over 300 whp and 320 tq iam not going to be doing meth just bigger injectors fuel pump bigger tmic and port and polish some stuff now the numbers I could make fr the 20g and 48 is there a big difference because a 1300 20g sure is alot
The answer is no. The 48 is really just a more refined 39, not worth it at all for an STI owner, but a good turbo for us TD04 guys.
cathode is offline   Reply With Quote
Old 07-07-2009, 01:57 PM   #134
arch4life
Scooby Newbie
 
Member#: 172588
Join Date: Feb 2008
Location: Ann Arbor, MI
Vehicle:
2005 saab 9-2x sti
Black

Default

Quote:
Originally Posted by scramjett View Post
I was really only commenting on the 2008+ STI's on the IWSTI Proven Power forum since the VF48 is only on 08+ STI's... With the 08+ STI's dual variable timing on intake and exhaust I've not seen a dyno over there crack 305whp on only pump gas.

Again, not trying to be a hater... I myself bought into the hype of the VF48 and bought one and its still in my garage. I've done a complete 180 on this turbo... I have not seen any dyno's of VF48 cars from anyone else other than P&L on this site. And those P&L dyno's are damned close to plots of TD05 20G cars from other tuner shops with similar setups/mods/dyno eqpmt.

I just don't think it serves our website comunity any good to hype up this turbo, which is a fine turbo, to being more than what it is. Hell, look at the P&L dyo plots on the 48's and it looks like 68HTA plots... holding something like 225wtq and 300whp to 7K... No way that is possible on the 48... not with what it flows. Thats why people are jumping onto the 68HTA bandwagon: to hold that kind of power to redline+. Go over to the Perrin site where they install a FMIC on an 08 STI and even with the extra cooling, the car does not hold power like is shown in all of the P&L plots. Where there's smoke there's fire and those P&L plots are giving out a lot of smoke. The only before and after plots I've seen from P&L have the stock unmodded power/torque #'s a lot higher than any other stock dynos. That tells me their dyno reads high when every other dyno comes back lower on stock cars.
i agree with you i was the troll in this thread for the first few pages

bravo. cant make power without air.
arch4life is offline   Reply With Quote
Old 07-07-2009, 03:24 PM   #135
cireturbo
Scooby Newbie
 
Member#: 119777
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Chicago, IL
Vehicle:
2013 BRZ
SWP

Default

Quote:
Originally Posted by arch4life View Post
i agree with you i was the troll in this thread for the first few pages

bravo. cant make power without air.
More food for thought.

The plot you are referring to is of my car, and this is a re-tune with just injectors and TGV deletes. 93 and 93/114 mix.



To put these numbers in perspective my car went 12.2 @ 113 (on the 93/114 mix) at the Midwest Subaru Shootout, is 342whp and a 113 trap really that inflated? As a point of comparison another 2.5L WRX with a Tomei M7760 which was making 360whp (on a Mustang dyno) was trapping around 110 the same day.

I'm not saying the VF48 is a magical turbo, but maybe with the right combination of parts it can hold power decently...
cireturbo is offline   Reply With Quote
Old 07-07-2009, 05:18 PM   #136
arch4life
Scooby Newbie
 
Member#: 172588
Join Date: Feb 2008
Location: Ann Arbor, MI
Vehicle:
2005 saab 9-2x sti
Black

Default

right combination of parts or not, that tune blew your motor up.

sure with race fuel you can push the hp up, reducing pumping losses running leaner, and run at MBT, futher increasing efficiency.

but running race fuel does not make the turbo flow more air. the compressor is only so large, you can throw it right off of its efficiency island, and sure, it might push more air, but then what? its very hot, and...... it blows your motor.

to post that dyno, and pass it along as normal for this turbo, when it is strung out to the maxxxx is what makes forums like this worthless.
arch4life is offline   Reply With Quote
Old 07-22-2009, 07:04 AM   #137
efaroh
Scooby Specialist
 
Member#: 166947
Join Date: Dec 2007
Chapter/Region: SCIC
Location: OC
Vehicle:
2006 WRX Sedan
Crystal Gray Metallic

Default

bump for more vf48 plots on 2.5L !!!
efaroh is offline   Reply With Quote
Old 07-22-2009, 11:11 AM   #138
modliving
Scooby Specialist
 
Member#: 161273
Join Date: Oct 2007
Chapter/Region: TXIC
Location: austin tx
Vehicle:
2008 forester xt
silver

Default

Here's my plot with an E85 tune. Mods are:

VF48
turboxs tmic
walbro pump
850 DW
Cobb TB
Perrin Fuel Rails
Cobb intake



I've since had a roadtune with a perrin inlet @22psi but not sure where the numbers are at. It definitely pulls harder.
modliving is offline   Reply With Quote
Old 07-23-2009, 12:37 AM   #139
efaroh
Scooby Specialist
 
Member#: 166947
Join Date: Dec 2007
Chapter/Region: SCIC
Location: OC
Vehicle:
2006 WRX Sedan
Crystal Gray Metallic

Default

nice numbers! i bet it pulls hard. id be interested to see plots on pump gas
efaroh is offline   Reply With Quote
Old 07-23-2009, 01:12 AM   #140
modliving
Scooby Specialist
 
Member#: 161273
Join Date: Oct 2007
Chapter/Region: TXIC
Location: austin tx
Vehicle:
2008 forester xt
silver

Default

It does pull hard but I don't like the torque steer I'm getting. It comes on so suddenly that it seems the front wheels are breaking loose.
modliving is offline   Reply With Quote
Old 07-23-2009, 01:26 AM   #141
efaroh
Scooby Specialist
 
Member#: 166947
Join Date: Dec 2007
Chapter/Region: SCIC
Location: OC
Vehicle:
2006 WRX Sedan
Crystal Gray Metallic

Default

u mean understeer?
efaroh is offline   Reply With Quote
Old 07-23-2009, 01:39 AM   #142
modliving
Scooby Specialist
 
Member#: 161273
Join Date: Oct 2007
Chapter/Region: TXIC
Location: austin tx
Vehicle:
2008 forester xt
silver

Default

Quote:
Originally Posted by efaroh View Post
u mean understeer?
No. When accelerating in a straight line I can feel the steering wheel pulling side to side : torque steer.
modliving is offline   Reply With Quote
Old 07-23-2009, 02:07 AM   #143
jay_parot
Scooby Newbie
 
Member#: 202352
Join Date: Feb 2009
Chapter/Region: International
Location: CHILE
Vehicle:
1996 STI V3 JDM
WHITE

Default

yeah baby !!!
jay_parot is offline   Reply With Quote
Old 07-23-2009, 10:53 PM   #144
eatus ravenous
Scooby Specialist
 
Member#: 26068
Join Date: Oct 2002
Chapter/Region: NESIC
Location: north central mass
Default

torque steer in a awd car tells you one of two things .
one, car has some decent power

two, front diff is on its way out .

or a combination of both
eatus ravenous is offline   Reply With Quote
Old 07-23-2009, 11:21 PM   #145
modliving
Scooby Specialist
 
Member#: 161273
Join Date: Oct 2007
Chapter/Region: TXIC
Location: austin tx
Vehicle:
2008 forester xt
silver

Default

I hope it's not diff - I only have 15k miles and I don't drive it hard. But you never know,.
modliving is offline   Reply With Quote
Old 07-24-2009, 01:50 AM   #146
efaroh
Scooby Specialist
 
Member#: 166947
Join Date: Dec 2007
Chapter/Region: SCIC
Location: OC
Vehicle:
2006 WRX Sedan
Crystal Gray Metallic

Default

if not the diff then could it be alignment or worn tires?
efaroh is offline   Reply With Quote
Old 07-24-2009, 10:56 AM   #147
modliving
Scooby Specialist
 
Member#: 161273
Join Date: Oct 2007
Chapter/Region: TXIC
Location: austin tx
Vehicle:
2008 forester xt
silver

Default

brand new sticky tires and alignment is ok. i'm making decent power on a vf48...say it.
modliving is offline   Reply With Quote
Old 07-26-2009, 10:17 AM   #148
cathode
Scooby Newbie
 
Member#: 120684
Join Date: Jul 2006
Chapter/Region: Tri-State
Location: Maplejerz
Vehicle:
08 Honda Acura RDX
I want a Fiesta ST

Default

287/324

peaking around 19.5 psi

tuned by Chris @ EFI Logics on his Mustang dyno

SPT intake, Turbo XS TMIC, catted downpipe

I'll get the plot up tomorrow.
cathode is offline   Reply With Quote
Old 07-26-2009, 11:24 AM   #149
4drcivicmaster
Scooby Specialist
 
Member#: 211113
Join Date: May 2009
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2004 STI
WRB

Default

^^ that is good power for being dynoed on a mustang.
4drcivicmaster is offline   Reply With Quote
Old 07-26-2009, 04:31 PM   #150
scramjett
*** Banned ***
 
Member#: 192526
Join Date: Oct 2008
Chapter/Region: MWSOC
Vehicle:
2008 WRX FMIC/VF48
Red/Steel Grey

Default

Quote:
Originally Posted by 4drcivicmaster View Post
^^ that is good power for being dynoed on a mustang.
^^ Is really good on a mustang.

Begrudgingly I am joining the VF48 crowd, for a little while at least. I just bolted on my VF48 onto my 08 as I was going to blow a blood vessel in my brain with the issues I was having trying to bolt on my 20G and mate it with either the GMS intlet and the Perrin inlet... Neither worked and the VF48 slid right into place like it was made for my car. Oh wait, it was... only the STI incarnation, however. GMS inlet fits fantasticly for this sized turbo (20G a different story!!). I painted my stocker inlet in aluminized paint and set down several layers of clear on it today... Damn thing looks like it's made out of metal!! Its going to take a while for everything to cure properly.

My other power mods are:

TXS Intake
TXS FMIC
TXS Up-pipe
TXS BPV
GMS Inlet
GrimmSpeed 3 port BCS
Invidia DP
Borla Catback
Deaustchwerks 850cc's
Walbro (RIP to one of my tiny ass weak studs!)
AP w/PDX Mail Order 93 piss water map

Need to still to mount the actual intercooler and my build is done. I'm going to tackle the inlet issues with the 20G later.... I'm going to build my own custom inlet.

Intercooler will be mounted either Tuesday or Wednesday when I can get some more free time to finish this project and the after some data logging and fine tuning with Jarad, I'm taking it to SpeedIndustry(.biz) to see what it lays down on their heartbreaking mustang dyno.

Until I see first hand my own results, I still will not buy into that P&L's dyno isn't one damned high reading dyno! The results they are posting are just about damned close to what other guys are getting out of the 68HTA. The VF48 should be no more different than the VF39s and VF43s...

Last edited by scramjett; 07-26-2009 at 04:39 PM.
scramjett 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
Should I swap VF39 for the VF48 on 03? guru_method Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 24 07-31-2010 03:28 PM
Deleting the weapon thread.. and the whining thread about me locking it is even lamer Fish Texas Impreza Club Forum -- TXIC 14 07-01-2010 01:29 PM
What is the max boost for the VF48? Tuned200 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 14 02-17-2009 05:59 PM
Quest for 11's in the VF48 Saabaru (How much more can I get out of my VF48?) cireturbo Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 30 09-24-2008 02:32 AM
Why did the 'Discsussion' thread for the SOA recommendation thread get closed? left footed whooten News & Rumors 6 09-05-2006 01:47 PM


All times are GMT -4. The time now is 01:33 PM.


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