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Old 08-04-2004, 10:28 AM   #1
Davenow
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Default STI+vf22 on stock boost control. What kind of gais we talkin here??

OK the wife has agreed to the STI
I am going to waiti it out till next spring, and get a good deal on a soon to be gone 05.
I have several parts off my WRX that will be going onto the STI

Txs stealthback
Tanabe GF210 04 spec springs
Perrin short ram
jet hot coated turbo heat shield
possibly TXS tmic V2 (yes I know how to make it fit)


VF22.

Now, what I want to know is what kind of bump will the VF22 be?
I know it will be small, but how much? I know obviously it will spool a little slower, and give me a little more mid/top end but what are we talkin?
ANyone have the CFM #'s for the 39? I am figuring on about a 10whp bump peak, and hold a little more boost to redline (even if it holds 1-2 PSI more to redline, thats a good 10-15 (or more) whp up top from the pressure alone, not to mention higher CFM, I am figureing on about 20+ by redline.

Oh I will also be using a UTEC on this.

Yes I know the 22 is small fof a 2.5, and doesnt hold boost as well as it does on the 2.0, but the 39 is smaller, so its still going to hold more boost than the 39. Even at the same boost pressure, its going to be working less, which means cooler air, which means more power.


Ok so I have searched, seen a couple threads, and came up with nothing solid.

Here is going to be the setup
TXS stealthback (catless)
Perrin short ram
jet hotted heatsheild (helps a LOT with heatsoak)
VF22 (P&P)
UTEC
POSSIBLY txs V2 TMIC

I am looking for (on TXS brand dyno, I forget what they have) 310-320whp and 325-340wtq.

I will eventully be going to the green, but thats going to be like a year off due to money issues when I do this. So its going to be like a year till its done.
The funny part is the springs are going on the car within an hour of taking delivery, and possibly a set of swaybars. The UTEC will be in the car with me along with a 10mm socket so that as soon as the odo pops over 1000 miles it goes in then teh exh as soon as I get a chance after that.

ANyway so for the setup I have listed, what do we think we are looking at for power???
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Last edited by Davenow; 08-04-2004 at 10:33 AM.
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Old 08-04-2004, 11:30 AM   #2
bikerboy
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A WRX Utec will not work in the STI, as for power less than stock without management and injectors as the stocks are maxed out.

Last edited by bikerboy; 08-04-2004 at 12:19 PM.
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Old 08-04-2004, 11:35 AM   #3
Davenow
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Quote:
Originally Posted by bikerboy
A WRX Utec will not work in the STI, as for power less that stock without management and injectors as the stocks are maxed out.

oh for christs sake.


IT WILL BE AN STI UTEC
why in gods name would I have to clarify that??
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Old 08-04-2004, 11:54 AM   #4
bikerboy
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Because Sally, you are saying you have parts from your WRX and were not clear that you are going to get a STI Utec. You might want to add a little clarity to your post.
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Old 08-04-2004, 12:52 PM   #5
KatukasGTi
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Is there any STi in the world that is not RICED ?
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Old 08-04-2004, 01:02 PM   #6
Subie Gal
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Quote:
Originally Posted by KatukasGTi
Is there any STi in the world that is not RICED ?

post and contribute in a positive manner
or get the hell out of here...

trolls are not welcomed
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Old 08-04-2004, 01:28 PM   #7
Abe Froman
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On the 2.0L

VF22 flows around 490 CFM at 18.0 PSI

VF34 flows around 460 CFM at 18.0 PSI

Not sure what that translates to HP-wise or even 2.5L-wise but you get the idea.
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Old 08-04-2004, 02:52 PM   #8
titsataki
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Default

I think VF22 is the biggest VF series turbo?
I am not sure if 18psi would off its efficiency range on an STi. But I think that people have run it. Maybe they can post a VF22 at 15-16psi and 18-19psi. With tuning maybe?

By the way upgraded fueling is a must since the stock fueling system is pretty much to the limit with the stock VF39.

Another thing I have heard is that the addition of the Walbro pump raises the stock fuel pressure on the STi? Not sure if it is a myth.

Some factors to think about.

Cheers

Nick
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Old 08-04-2004, 03:06 PM   #9
Abe Froman
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Quote:
Originally Posted by titsataki
By the way upgraded fueling is a must since the stock fueling system is pretty much to the limit with the stock VF39.
At what psi and AFR is this the case?

Does the 22 flow that much more air? I know people are running the VF30/34(larger housing than 39 - not as big as 22) with rich AFRs and slightly higher boost at redline and not maxing injectors.
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Old 08-04-2004, 04:39 PM   #10
Focus4
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you could always send your vf22 to deadbolt and get the pe1820 style wheel put into it so you would essientially have a pe1820 which will make more power...
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Old 08-04-2004, 04:46 PM   #11
V6TurboTA
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Quote:
Originally Posted by KatukasGTi
Is there any STi in the world that is not RICED ?
Mine


dave, did you start drinking early today?

~v6

Last edited by V6TurboTA; 08-04-2004 at 06:56 PM.
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Old 08-04-2004, 06:41 PM   #12
pestysti
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Quote:
Originally Posted by Focus4
you could always send your vf22 to deadbolt and get the pe1820 style wheel put into it so you would essientially have a pe1820 which will make more power...

thats what i did i love my set up i have yet to dyno it yet but i run up to 21-22 lbs mind range (with the help of a waste gate spring) and taper it to 14-15 at redline with good butt dyno results and let me tell you i am running PIG rich i have mod injectors and a 255 pump my injectors are scaled to 800cc in the utec and it is still running rich as hell i plan to get it to a dyno in the next 2 weeks for a good tunn

bye the way there were a couple of people who made 360 ft-lbs on a pnp 22
with 330hp no thats a nice improvement over stock with out spending a lot of cash for a turbo

Dustin
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Old 08-04-2004, 07:57 PM   #13
Davenow
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Quote:
Originally Posted by pestysti

bye the way there were a couple of people who made 360 ft-lbs on a pnp 22
with 330hp no thats a nice improvement over stock with out spending a lot of cash for a turbo

Dustin
who? I would LOVE to get a dialog going with these people
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Old 08-04-2004, 07:59 PM   #14
Davenow
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Quote:
Originally Posted by KatukasGTi
Is there any STi in the world that is not RICED ?

ALL power mods and NOT ONE visual mod listed.
Some people need to be made to look stupid, some do it on their own.
YOU sir, made yourself look like a dick, AND a moron all in one shot. Name one single mod in my list that you would even be able to tell is there. (other than the springs, which, if you had ever ridden in an STI, you would know it SORELY needs, not only for handling, but ride comfort.)
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Old 08-04-2004, 08:49 PM   #15
fastsubie
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Quote:
Originally Posted by Focus4
you could always send your vf22 to deadbolt and get the pe1820 style wheel put into it so you would essientially have a pe1820 which will make more power...
He can do it to the vf39 too.

Read what is going on here: http://www.imprezawrxsti.com/postnuk...wtopic&t=12573

Fess
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