Welcome to the North American Subaru Impreza Owners Club Saturday December 16, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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. 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 05-10-2006, 03:53 PM   #1
Scooby Specialist
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
2006 Corvette C6 Z51

Default VF22 and lag: Photographic evidence of the myth.

I think one of the biggest questions on this forum is "What turbo should I run". I've asked myself that question countless times and ended up running a VF22, mainly because:
1- It was very cheap (less than $400 shipped to my doorstep)
2- It is the largest turbo my injectors will support. I would definitely need bigger injectors to run a bigger turbo. A bigger turbo would also cost a lot more. If I get bigger injectors, I would need a standalone ECU (my V5 JDM ECU is not reflashable) to control them. If I got a standalone I would need to tune it on a dyno... Plus anything bigger than a VF22 and I would also probably want a FMIC to make the most of it... FMIC + Turbo + Injectors + ECU + Dyno Tune = close to 3 grand. No thanks
I chose the VF22 looking for power, but most of what I read on this forum pointed to it being a very laggy turbo, which I really didn't want since I autocross all the time.
So, how laggy is it?
Here it is:

1 atmosphere of boost (read at the center of the intake manifold) at just shy of 3200RPMs. This on 5th gear, level road (slight decline actually).
On a untuned JDM V5 Type RA ECU.
The setup:

JDM V8 shortblock, JDM V5 Type RA heads, mated with stock STI head gaskets and ARP head studs.
Ported and polished intake manifold, up pipe, turbocharger turbine inlet, turbocharger compressor inlet and outlet, intercooler Y pipe elbows, throttle body, intake manifold.
Wrapped headers, up pipe, down pipe. Ceramic coated turbo hot side
Perrin turbo inlet, USDM STI intercooler.

Here is a dyno of the car ***UNTUNED***:

After a ECUTEK reflash the car gained 30AWHP / 30AWTQ and peak torque now happens 580rpms sooner in the power band. Tuning really is everything on these cars... Still, 288AWHP on a stock ecu map isn't too shabby either

I figured this might be of some use to some of you.

Now, my question... At what RPMs do you guys see 1ATM / BAR of boost and what turbos are you running?

Last edited by powerlabs; 11-27-2006 at 04:26 PM. Reason: More info.
powerlabs 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
Need hard evidence of the function of the STI spoiler vapore0n General Community 149 10-04-2017 08:54 PM
Jesus potato. Clear evidence of the Divine. taxcider Off-Topic 7 04-06-2010 12:24 AM
Evidence of the Change (tm) is upon us! CosmoTheCat Political Playground 23 11-10-2008 03:39 PM
boost questions and has anyone heard of the 3/16 mod jacket03WRX Newbies & FAQs 5 09-24-2004 11:05 AM

All times are GMT -4. The time now is 06:56 AM.

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.