Welcome to the North American Subaru Impreza Owners Club Monday January 26, 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.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-09-2007, 04:24 PM   #1
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 Limited SWP BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Thumbs up VF39 VS. VF43 Revisted

Well...Let me just say..that a VF43 is way stronger than my old VF39...
to the point where I will have to retune the boost levels...

My Stock VF39...was tuned to 20.5 lbs of boost....Falling off considerably after 4800 RPMs. down to about 11 psi and yes it had the famous crack, which is why I upgraded anyways........it would start to spool about 1800 rpm..(I had a Full race SCCA BSP tune, to be able to spool as soon as I could)...Full boost would be around 2300 RPM and it wouldn't hold boost worth a crap above 4800 RPM.......

Now:

It still goes on boost about 2000 RPM...so it moved about 200 RPM to the right...which is still decent on my BSP Tune with UTEC....but Now it holds boost to like almost 6000 RPM....then it only drops off to about 15.5 lbs...so its stronger on top...
It actually went to 25 PSI the first couple of pulls(pulling timing)...so I had to reduce Boost to have it a ROCK HARD 20.5 lbs...from the start now...PULLS STRONG...

I am probably going to have to have a retune done... to optimize everything...but before...My tune was 326 AWHP...and 364 Torque...on stock vF39, Lightweight stock sized Crank pully, Divorced Wastegate Exhaust (No cats)..and a K@N Typhoon, Fuel Pump, UTEC...also had a Larger TMIC...so I am going to have to see how it compares to my 39 setup...Right now by the butt dyno...it feels stronger...and pulls harder...

BTW..this info is posted because I couldn't find a decent thread comparing the 39 to the 43....Hopefully..it will help some of you that are trying to make a decision on which turbo to go with ...a 39 or 43......

Thanks

Bill
Scooby South is offline   Reply With Quote
 

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
VF39 vs. VF43 iwantmyWRX Newbies & FAQs 28 12-12-2007 11:58 AM
Vf39 vs. Vf43 aps turboback divider MKXIII Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 3 07-02-2007 12:06 AM
WTB: VF39 or VF43 Evil XT Private 'Wanted' Classifieds 7 03-10-2007 01:27 AM
VF34 vs VF35 vs VF43 Kevin23 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 0 06-02-2006 08:31 AM
2.2L vs. RS revisted jamesfacts New England Impreza Club Forum -- NESIC 41 03-12-2004 03:37 PM


All times are GMT -4. The time now is 11:41 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.