Welcome to the North American Subaru Impreza Owners Club Thursday November 23, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

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 05-16-2005, 11:37 PM   #1
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default fitted the vf23 today...

i just couldn't wait any longer! took 2 hours, no complications.

3rd gear roll on from 2k...
one bar @ 3k5,
20psi @ 3k8, inherent taper to 18 @ redline
4.4 mafv @ 5k8 till redline

less torque below 4k, more above.

SLIGHT retune of the fuel and ignition maps... much less than i expected. mostly pulled back the crossover rpm region where the turbo hits and comes on full boil, and took a little out of high rpm/high load, where the td04 never ventured. got some light knock, pulled about 2 degrees in the region(s), and never got another knock.

due to static injectors at high rpm, i had to bump fuel pressure another 5psi, to a total of 63psi static (atm. reference). this is oem fp +20psi. this brought idc back down to mid/high 90s. injector scale went from 505 to 515cc/min to offset. i tune for 11.5:1 afr from boost threshold to redline @ full load. fuel pump is quiet, afrs are rock steady.

so far, i'm ! fwiw, i am pleased with the response... it's no oem turbo--i figure i lost about 600 rpms of spool/about a half a second time-wise--but it pulls a LOT harder up top.

more data later. till then, sharing the love!!!

ken
* Registered users of the site do not see these ads.
ride5000 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-16-2005, 11:49 PM   #2
311grassroots
Scooby Newbie
 
Member#: 81187
Join Date: Feb 2005
Chapter/Region: Tri-State
Location: IBwhatkindalocationisthat
Default

congrats man.... sounds like you did all the tuning yourself, which is very impressive. Oh I'm going to NEIT this summer up in warwick ri for their automotive program, if you want maybe we could meet up sounds like i'd learn a thing or two from you

P.S. Good luck with everything
311grassroots is offline   Reply With Quote
Old 05-16-2005, 11:53 PM   #3
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

W00t ! ! ! ! !
Uncle Scotty is offline   Reply With Quote
Old 05-17-2005, 07:06 AM   #4
TheMadScientist
Scooby Guru
 
Member#: 23717
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Beverly, MA
Vehicle:
2005 Big red

Default

Glad to see you got that thing on finally. Can't wait to see what you get out of it.

TMS
TheMadScientist is offline   Reply With Quote
Old 05-17-2005, 08:31 AM   #5
scoobie1
Scooby Specialist
 
Member#: 41559
Join Date: Aug 2003
Chapter/Region: South East
Location: Charleston, SC
Vehicle:
2007 Brocoma

Default

What are your mods? I'll send you some of the maps I have for my vf23 if you want em. That's weird that you lost some spool time, if anything, my 23 spooled at the same spot as my stock turbo, some people think it axtually spools before my stocker did.
scoobie1 is offline   Reply With Quote
Old 05-17-2005, 09:18 AM   #6
mbiker97
Scooby Guru
 
Member#: 7922
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Tucson
Vehicle:
04 CTS-V b/b/b
99 GMC Highrider

Default

Nice. When I switched from the stock turbo to a vf24 the car was completely different.
mbiker97 is offline   Reply With Quote
Old 05-17-2005, 09:34 AM   #7
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

Quote:
Originally Posted by 311grassroots
congrats man.... sounds like you did all the tuning yourself, which is very impressive.
tuning is something not to be taken lightly (unless you like doing motor swaps) but it's not incredibly difficult. you take lots of logs, determine what needs to be tweaked, make small isolated changes and you take more logs. what you really need is a bit of logic, a medium amount of knowledge, and a lot of patience. oh yeah--you must have the proper tools: wideband, boost, egt, user tunable ecu w/datalogs, laptop.
Quote:
Originally Posted by scoobie1
What are your mods? I'll send you some of the maps I have for my vf23 if you want em. That's weird that you lost some spool time, if anything, my 23 spooled at the same spot as my stock turbo, some people think it axtually spools before my stocker did.
c'mon man... as much as i'd like to believe it, there's no free lunch.

if it DOES spool faster than your stock turbo did, then you never really squeezed out the last bit of performance out of the stocker. my oem turbo is still going strong and i beat the **** out of it. there's a DEFINITE hole of torque with this vf23 between 3 and 4k that just wasn't there with the oem turbo. the mafv numbers back this up.

on the way into work, in the 60* air, i got a string of 4.5 mafv at the top of second and third, around 5k up. that's a NICE bump in airflow, and doesn't come without some penalties. one of which is that i'm again running out of injector headroom: static at 6k5 and 11.4:1 afr. the afrs are still good but if it gets any colder... i might actually have to turn down the boost. well, there's that, or add water injection, which is probably my next move.

i appreciate the offer for maps but i have no need for them--i've spent a lot of time on my current maps and as i stated earlier i am shocked at how similar the car runs to before the swap. that's fine with me, as it saved me a LOT of redundant work.

i have also come to realize how much more stress the braking system is put under when you start bumping up the power levels... funny how much more kinetic energy there is at 120mph than 100! (private airstrip facility testing of course.)

ken
ride5000 is offline   Reply With Quote
Old 05-17-2005, 11:13 AM   #8
pezman04wrx
Scooby Specialist
 
Member#: 66558
Join Date: Jul 2004
Chapter/Region: NESIC
Location: MA
Default

Very nice ... Anything done to the VF-23 yet, or is it still in stock trim ... I know you certainly had the stocker worked a bit ... Good job ... BTW, what's going to happen to the stocker? ...
pezman04wrx is offline   Reply With Quote
Old 05-17-2005, 12:01 PM   #9
Zola
Scooby Specialist
 
Member#: 16876
Join Date: Mar 2002
Chapter/Region: MWSOC
Location: St Paul, MN
Vehicle:
2002 Impreza WRX
WR Blue

Default

Ken: Congrats from a fellow VF23 owner. I expect you'll love it. Out of curiosity, what kind of octane do you folks have out there and what kind of advance are you running at full tilt torque peak?

Joel
Zola is offline   Reply With Quote
Old 05-17-2005, 01:55 PM   #10
Unabomber
👏 Big Ron 👏
Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

Ken,

Booooo for going to the dark side. I'm not sure if you saw it or not, but here's what real men do with their stock turbo: linky.
Unabomber is offline   Reply With Quote
Old 05-17-2005, 02:07 PM   #11
pezman04wrx
Scooby Specialist
 
Member#: 66558
Join Date: Jul 2004
Chapter/Region: NESIC
Location: MA
Default

^^^ I'd be willing to bet a box of waffles that he was there already ... Certainly something to be said for self tuning, and having the logs to back it up ... Then again, his car isn't a dyno queen either, so who really knows ...
pezman04wrx is offline   Reply With Quote
Old 05-17-2005, 03:15 PM   #12
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

Quote:
Originally Posted by Unabomber
Ken,

Booooo for going to the dark side. I'm not sure if you saw it or not, but here's what real men do with their stock turbo: linky.
well ron, my stock turbo has been placed on the bench... second string, if you will..

as i posted in your thread, those are some nice results on your tune! a good +80hp over stock is nothing to shake a stick at. the fact that you're on stock fuel means you're running a very good BSFC.

take your torque chart and chop it off of the 3 to 4k range, and paste it on in the 6 to 7k range, and you have the vf23... it's really not so different in the midrange. then again i was pushing 20psi in the midrange before too!

last night i took some time to put together an excel spreadsheet w/ charts showing before P+P exhaust manifold, after P+P exhaust manifold, and after vf23. the maf, map, and rpm numbers are pretty interesting. by looking at the slope of rpm vs. sample (which is pretty fixed via the internal timing of the utec logger circuit) you can visualize acceleration, aka torque.

only trouble is i'm having some issues with updating my website, so posting stuff, while not impossible, is much more difficult than before. plus my wife's got 3 weeks to D-day.

john, i'm going to hang on to my stocker for a while. i DO however have an extra ported td04 housing that is waiting for a new home. a turbo R+R takes me about 2 hours. figure another half hour to pull the exhaust housing off. you/we could easily do this in my driveway. there IS a difference with a gasket matched/smoothed over hotside, i can tell you that.

ken
ride5000 is offline   Reply With Quote
Old 05-17-2005, 08:06 PM   #13
ebeck
Scooby Specialist
 
Member#: 35585
Join Date: Apr 2003
Location: Scottsdale AZ.
Vehicle:
RIP I'll always be
The Ver8 Magistrate

Default

Hey right on! Congrats man. Fun turbo for sure. Need the extra power to haul the baby seat and baby diaper bag around.
ebeck is offline   Reply With Quote
Old 05-17-2005, 08:06 PM   #14
scoobie1
Scooby Specialist
 
Member#: 41559
Join Date: Aug 2003
Chapter/Region: South East
Location: Charleston, SC
Vehicle:
2007 Brocoma

Default

Quote:
Originally Posted by ride5000

c'mon man... as much as i'd like to believe it, there's no free lunch.

if it DOES spool faster than your stock turbo did, then you never really squeezed out the last bit of performance out of the stocker. my oem turbo is still going strong and i beat the **** out of it. there's a DEFINITE hole of torque with this vf23 between 3 and 4k that just wasn't there with the oem turbo. the mafv numbers back this up.
I'm not kiddin, and that's not just my opinion. I don't know if I had everything out of my stock turbo or not, I had all the usual upgrades except I was still running the factory TMIC. Also, I added water injection to my 23 setup about 3 weeks ago now. I would highly recommend it.
scoobie1 is offline   Reply With Quote
Old 05-17-2005, 10:07 PM   #15
distorto
Top Scoob 024
 
Member#: 56364
Join Date: Mar 2004
Chapter/Region: International
Location: houston, texas
Vehicle:
RIP stompr :(
bagged vulvva

Default

glad to hear the good review, i have a ceramic coated and ported vf23 waiting to go on my 4eat...
distorto is offline   Reply With Quote
Old 05-17-2005, 11:03 PM   #16
Davenow
Scooby Guru
 
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar
Vehicle:
.

Default

1 bar at 3500? Why is it spooling so slowly?? (I am serious) My 22 spooled to 14PSI by 3000. The 23 should be faster spooling...
Davenow is offline   Reply With Quote
Old 05-17-2005, 11:42 PM   #17
mbiker97
Scooby Guru
 
Member#: 7922
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Tucson
Vehicle:
04 CTS-V b/b/b
99 GMC Highrider

Default

^^ Actually you're right. I was hitting 18 psi by 3200 with my vf24 (stock manifold though).
mbiker97 is offline   Reply With Quote
Old 05-18-2005, 10:08 AM   #18
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

i'm not sure why the slow spool. it WAS 3rd gear though. i'll do a 4th pull sometime today. then again i have to grab some pickets for my damned fence... time is getting short!
ride5000 is offline   Reply With Quote
Old 05-18-2005, 10:43 AM   #19
Davenow
Scooby Guru
 
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar
Vehicle:
.

Default

Quote:
Originally Posted by ride5000
i'm not sure why the slow spool. it WAS 3rd gear though. i'll do a 4th pull sometime today. then again i have to grab some pickets for my damned fence... time is getting short!
Did you port that thing before putting it on?
Try dropping a point of timing down low to pump the egts up?
Davenow is offline   Reply With Quote
Old 05-18-2005, 10:52 AM   #20
jamesfacts
Scooby Guru
 
Member#: 51282
Join Date: Dec 2003
Chapter/Region: Tri-State
Location: Brooklyn
Vehicle:
98 RS
black & blue from parking

Default

Sounds like a lot of fun Ken, I definitely have to come check it out sometime.

This means you don't need your TD04 maps anymore, right?
jamesfacts is offline   Reply With Quote
Old 05-18-2005, 11:32 AM   #21
jblaine
Scooby Guru
 
Member#: 8512
Join Date: Jul 2001
Chapter/Region: South East
Location: St. Pete, FL
Vehicle:
2002 WRX chassis...
stage-infinity.com

Default

Glad to hear it went smoothly, Ken.
jblaine is offline   Reply With Quote
Old 05-18-2005, 01:25 PM   #22
cdvma
Scooby Specialist
 
Member#: 21980
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Central MA
Vehicle:
2002 PSM WRX (Sold)
2009 BMW X5

Default

Quote:
Originally Posted by americanyouth
Sounds like a lot of fun Ken, I definitely have to come check it out sometime.

This means you don't need your TD04 maps anymore, right?
If you are hinting at getting his TD04 maps, I wouldn't since his fuel pressure is abnormal.

Nice results, Ken. Keep the hits coming...
cdvma is offline   Reply With Quote
Old 05-18-2005, 01:35 PM   #23
TheMadScientist
Scooby Guru
 
Member#: 23717
Join Date: Aug 2002
Chapter/Region: NESIC
Location: Beverly, MA
Vehicle:
2005 Big red

Default

Quote:
Originally Posted by Davenow
Did you port that thing before putting it on?
Try dropping a point of timing down low to pump the egts up?
That may bring the turbo in sooner. But it might not bring the torque in sooner.
He would have to try it out to see. I know I like lean and advanced prespool it seems to have more grunt down low.

TMS
TheMadScientist is offline   Reply With Quote
Old 05-18-2005, 03:42 PM   #24
scoobie1
Scooby Specialist
 
Member#: 41559
Join Date: Aug 2003
Chapter/Region: South East
Location: Charleston, SC
Vehicle:
2007 Brocoma

Default

Quote:
Originally Posted by ride5000
i'm not sure why the slow spool. it WAS 3rd gear though. i'll do a 4th pull sometime today. then again i have to grab some pickets for my damned fence... time is getting short!
I'll do a pull in 3rd today on my way home and let you know exactly what mine is doing just for reference.
scoobie1 is offline   Reply With Quote
Old 05-18-2005, 03:45 PM   #25
Davenow
Scooby Guru
 
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar
Vehicle:
.

Default

Quote:
Originally Posted by TheMadScientist
That may bring the turbo in sooner. But it might not bring the torque in sooner.
He would have to try it out to see. I know I like lean and advanced prespool it seems to have more grunt down low.

TMS
But isnt there less tendancy to det with lower timing?
Then agian detonation sub 3300rpm isnt typically too much of a problem
Davenow 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
how much more hp does the vf22 put out over the vf23 godfather2112 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 02-09-2005 08:17 AM
Where is the best place to get the VF23 waitandbleed92 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 2 06-24-2003 03:56 AM
Will VF23 from Ver. III STi fit the WRX? mca Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 10-03-2002 07:27 PM
Let's compare the VF23 to the VF30 turbo's HOKOS Texas Impreza Club Forum -- TXIC 19 07-29-2002 07:10 PM
So whats the best FMIC for the VF23? codean Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 1 06-18-2002 01:08 AM

All times are GMT -4. The time now is 12:28 PM.


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