mindzeye

Well it will be almost 2 years since I went Stage 3, and quite frankly, I am looking for a little bit more pep. Not that the car isn't fun to drive already, but I guess I already got used to the power it is putting down at the moment. Maintaining a daily driver is important to me.

The route I want to go is very minimal with just swapping out the current VF41 to something a tad bigger, all the while keeping the 650cc injectors. Needless to say, with these size injectors it will be a conservative tune. With that said, what would be my best bet - 18g, 20g, etc? Right now I'm putting down 312hp/320tq at the hubs per the Dynapack. I'm looking for more power in the ~350 - 375whp territory as I do not want to grenade my stock tranny. Of course I will get re-tuned and a high-performance clutch.

It would be nice to have linear power, but I wouldn't mind more top-end power either. Is it worth even upgrading to something bigger than a VF with 650cc injectors? I was also thinking of going EWG, but I don't think the added noise will be passenger friendly. Any input is greatly appreciated.

Here's what she has right now:

- PnP/ceramic coated VF41 turbo (purchased BNIB)
- Ceramic coated/heat wrapped Grimmspeed up pipe
- Perrin turbo inlet
- DW 650cc injectors
- Walbro 255 fuel pump
- PnP TGV deletes
- 3mm Grimmspeed phenolic spacers
- PnP/ceramic coated/heat wrapped exhaust manifold runners
- Ceramic coated/heat wrapped Grimmspeed crosspipe
- Grimmspeed 3 port EBCS
- 2007 STi TMIC
- Cobb SRI/airbox
- Cobb TBE
- Grimmspeed AOS

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07 WRB FXT 5spd - 312whp/320wtq VF41 Church tuned

Patrick P931

Do you have E85 available? Re tune it for that and you'll get a "new" feeling, at least for a while. :-)

Otherwise a 20g and larger injectors, see what Nate has done. He is very happy with that upgrade.

:-)
Patrick

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07 FXT
400+ ?

mindzeye

Thread Starter

Unfortunately, E85 isn't as abundant as it is everywhere else. Also with E85, I thought you needed at the very least 1000cc injectors?

EDIT - Who is Nate? Do you have a link to his post?

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07 WRB FXT 5spd - 312whp/320wtq VF41 Church tuned

phantomfozzy

There's also meth.

Nates 2011 xt

Shef

I run 850's on my 18G and am about 85% IDCs, but I am also at altitude.

Nate:
Nates 2011 xt

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04 FXT 18G E85
00 Outback 5MT
8th & 9th Subarus

Superacerc

18g probably wont get you there on pump gas. 20g will but you will need bigger injectors.

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e85 on a TD05-20g, suspension and brake upgrades.

sleestak

I am also running e85 - 850's with a vf39 and at 23psi I am also in the 80% arena. I am also running a dw305 fuel pump. Definitely adds some "wee" factor.

mindzeye

Thread Starter

You guys are so lucky to have multiple gas stations in your area with E85. Right now I have to settle with crappy California 91 octane. So from what I gather, it sounds like my injectors are the bottleneck at this point.

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07 WRB FXT 5spd - 312whp/320wtq VF41 Church tuned

Patrick P931

Injectors and turbo if you don't have a choice in fuel. ID1000 and a 20G, just like the rest of us are going. ;-)

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07 FXT
400+ ?

voodoolord

I was under the impression that 300-325 whp as about as far as you want to push a stock tranny. Thats the main reason Im sticking with the VF43 right now but upgraded to 1000cc injectors and forged internals so when the tranny bites it I can upgrade that and move up to the 20G area. That seemed like the logical course.

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I carry a gun because a cop is too heavy

Ryan B

I was on the fence about getting injectors for my vf48 Im about to have installed. I think I may just do it and get a e85 tune as well.

northman

Torque is what kills the tranny. You can make 350 whp and the same max torque as 300 whp, just use a bigger turbo that can make target boost later in the powerband. I think a car tuned that way is easier on the tranny, a 20G or similar sized turbo will ramp up the boost a little more gradually, thus shocking the drivetrain less. I'll attach an old dyno comparison that shows what I mean.

Attached Files

Dom vs VF.pdf (143.0 KB, 28 views)

Bassmaker

How about something like an MD321 turbo? Somewhat costly but I've seen some serious figures on the 2.5 engines with these. They also have a pretty low spool up (around 2.5K) and pull hard all the way to the redline without dropping pressure. There are variants too with ceramic coating and/or billet compressor wheels. But, as said above, you are approaching the limits on your tranny but unless you use all this power on a regular basis, like track or drag strips, even though you are passed the specified tolerance, it should be ok for the odd crazy burst, I would have thought?

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Scruffy 99 S Turbo. TD04-19T hybrid. DeCat. JGM.

Bassmaker

For the car, you mean? .

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Scruffy 99 S Turbo. TD04-19T hybrid. DeCat. JGM.

mindzeye

Thread Starter

Thanks for the responses, guys. Any recommendations as to where I can get my ID1000's at the best possible price? I think I will go for the 20g in the near future, but now the questions is: which one? lol

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07 WRB FXT 5spd - 312whp/320wtq VF41 Church tuned