VF39 on a 1993 Legacy turbo?

Tommio RS · Post by **Tommio RS** » Sun Mar 16, 2008 1:03 am

Hi there! I was wondering if i could swap out my old VF11 turbo with a VF39 turbo off an STi. BTW im running a Auto trans. If i were to perform this turbo swap or any turbo swap i would get a good turbo back exhaust, and an intercooler, WRX or AWIC style. I would NOT be running more than 15 PSI of boost. But ya. Can i swap my VF11 for the STi VF39? How hard would it be? How much more power would i gain? And the most important fact! How much more fun would it be!

Thanks!

dscoobydoo · Post by **dscoobydoo** » Sun Mar 16, 2008 1:38 am

Not a big issue to make work. I went to a Super 16G, and the plumbing would be the same. You would have to go to the mentioned intercoolers to make it worthwhile. And as you mentioned, a larger exhaust would have to be utilized also. You will also have to go with a boost controller and a fuel cut defender.
The injectors would not handle that power, so trying to see if the 440's would work with your ECU would be the mimimum size I would use.

I had to go with the 565's and a piggy back ecu unit to assist.

But since vf39s are cheap and plentiful, I would say go for it.

Tommio RS · Post by **Tommio RS** » Sun Mar 16, 2008 6:40 pm

Sweet! Thats awsome! Im soo doing that once i gather up some more money! But my question is the injectors. What injectors fit? WRX/STi aftermarket. And ya. would i get performance closer to a WRX or a wrx/sti mix?

Thanks! I love that idea!!

dscoobydoo · Post by **dscoobydoo** » Sun Mar 16, 2008 9:12 pm

very close if not better than a stock WRX.

The STI side feed injectors are what you need to get. NISMO has side feeds that fit as well.

Tommio RS · Post by **Tommio RS** » Sun Mar 16, 2008 11:20 pm

That sounds good to me! As long as the car accelerates faster...like 2 or 3 seconds off the zero to sixty time ill be happy! But where can i find a used VF39 around?

Thanks!

asc_up · Post by **asc_up** » Mon Mar 17, 2008 6:17 am

NASIOC.com

There are tons of them.

Tommio RS · Post by **Tommio RS** » Mon Mar 17, 2008 4:52 pm

Thanks!

the_watts10 · Post by **the_watts10** » Mon Mar 17, 2008 5:52 pm

ok sorry to take over this blog but anyway guys, is the vf39 plumbing the same as an td04? And will a stock 1993 ss ecu handle the 440 injectors?
and also on the injectors you would have to use an NA fuel rail off of an 1990-1991 legacy right?

BXSS · Post by **BXSS** » Mon Mar 17, 2008 6:40 pm

A few people including me are running 440's off the stock ej22t ECU.

I'm running a EJ20G with its grey-top 440's off the SS ECU, & to my surprise it runs OK...

Tommio RS · Post by **Tommio RS** » Tue Mar 18, 2008 3:27 am

Hmmm very interesting... BXSS from where did you get your injectors?
But now i wonder if i should run the VF24/VF28 because my car is an auto and spool up time means alot to me!

biggreen96 · Post by **biggreen96** » Tue Mar 18, 2008 4:36 am

I have a vf39 too. One thing that hasn't been mentioned yet is the intake plumbing is different. The stock turbo has a 90 inlet, the vf39 doesn't.

These are the injectors I used:

http://bbs.legacycentral.org/viewtopic. ... highlight=

"theglobesavingsgroup" on ebay sold me these for a good price.

I have a HKS fuel comp and I am only pulling like 8% on the lower end and then pulling 4-5% mid and 2% at the high end so I bet you wouldn't have a problem using just the ECU and letting it compensate over time. I only am boosting 1.1 bar.

Arctic Assassian · Post by **Arctic Assassian** » Tue Mar 18, 2008 4:26 pm

15 psi on a vf39... Thats good for 280 ps or so.

Tommio RS · Post by **Tommio RS** » Wed Mar 19, 2008 3:18 am

So i could run them gray topped injected with my Stock ECU?? If so thats SWEET! and Biggreen96 when does the VF39 kick in? 3500rpm or so??

Thanks!

biggreen96 · Post by **biggreen96** » Wed Mar 19, 2008 5:30 am

yeah I am pretty sure it hits 15 psi @ 3500 or a little earlier even. I have a dyno chart that I will post later if you are interested, I have to get it off my laptop.

asc_up · Post by **asc_up** » Wed Mar 19, 2008 6:18 am

I'm interested...

BXSS · Post by **BXSS** » Wed Mar 19, 2008 2:17 pm

Greytops came on the EJ20G ('95 JDM WRX) I have in my SS.

So you could look for 93-96 JDM WRX injectors to get these.

I have a '98 STi Intake manifold & it has Yellow injectors that I think are slightly larger than 440 - I think they may be 480's

Arctic Assassian · Post by **Arctic Assassian** » Thu Mar 20, 2008 4:48 pm

You may need something to fool the maf a little, but for the most part, yes, you can get the numbers you are looking for from the stock computer.

Tommio RS · Post by **Tommio RS** » Mon Mar 24, 2008 1:31 am

K. New question here! I was wondering...Is it at all possiable to Hybrid a VF11 with another VF series turbo?? Because it REALLY like when the stock turbo kicks in at low boost. Basiclly i just want a turbo that have like 1 bar or higher that can still offer fantasic low end power!

Really i just want a torque car...more torque than horsepower. Is that out of the question for a turbo appliaction?

Thanks!

biggreen96 · Post by **biggreen96** » Mon Mar 24, 2008 6:48 am

Definitely not out of the question. My vf39 car made 235 tq and 216 hp (still trying to get a new scan of my dyno chart, sorry).

I turned up my boost to about 1.3 bar ~19 psi and while it hits full boost at 3k its feels strongest 4k-5.5k.

Tommio RS · Post by **Tommio RS** » Mon Mar 24, 2008 4:40 pm

Cool! That sounds dam good! See the thing is what makes torque higher than horsepower? CFM's,PSI? does anyone know this combo?

biggreen96 · Post by **biggreen96** » Thu May 01, 2008 6:16 am

Sorry it took so damn long to get a pic. Hopefully I can get this scanned soon.

Link to album, you can zoom on it and see it better.

aspect · Post by **aspect** » Sat May 24, 2008 9:15 pm

Tommio RS wrote:K. New question here! I was wondering...Is it at all possiable to Hybrid a VF11 with another VF series turbo?? Because it REALLY like when the stock turbo kicks in at low boost. Basiclly i just want a turbo that have like 1 bar or higher that can still offer fantasic low end power!

Really i just want a torque car...more torque than horsepower. Is that out of the question for a turbo appliaction?

Thanks!

Not at all! It's all in the tuning though, which is hard to really do on a legacy without going standalone.

For instance, this is an 05 STi with exhaust, intake, and great tuning:

Arctic Assassian · Post by **Arctic Assassian** » Sat May 24, 2008 10:18 pm

Oh my GOD! That power band is HUGE!

Tommio RS · Post by **Tommio RS** » Thu May 29, 2008 11:42 pm

See thats what im talking about! Crazy low end torque! I love torque if you can tell. So with a host of mods i can get good torque and power without using a new ecu.

Can you hybrid a VF11 with any turbo?

Thanks!

dropdfocus · Post by **dropdfocus** » Wed Jun 04, 2008 1:18 pm

It's not worth the hassle to try and do. The VF11 has its limits and that's why it's just easier to pickup a VF39, TD04, or the most preferred TD05-16g. The only one you can't just bolt right on is the VF40 from the new Legacy GT cars. Totally different setup on the turbo.

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VF39 on a 1993 Legacy turbo?

VF39 on a 1993 Legacy turbo?