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Old 09-01-2005, 04:26 PM   #1
superdupersubaru
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Default whats the best turbo for my aplication

ok so ive dont guess ive done everything but upgrade the turbo so I wanna get the largest turbo possible and will suffer lag but as lil as posible,,heres what im workin with..03 wrx,,
hks carbon ti exhaust
3" catless downpipe
dc sports upipe also catless
greddy fmic and intake
sti injectors
walborogh fuel pump
ecutek reflash running about 16 psi..
hks ssq bov
exeedy clutch pressure plate and flywheel...
so yeah theres my car in writing its fast now but can anyone out there in big turbo land tell me what the best turbo is for my car I wanna be faster than all hell and dont care if i have to wait for the spool...also can you tell me the next step in upgrading my car I need some direction...thanks...
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Old 09-01-2005, 04:32 PM   #2
Agkelos
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You have all those mods on your car now? What turbo are you running now? What are you planning on doing to your transmission? You say you want to go "faster than all hell," can you give us an estimated power goal?
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Old 09-01-2005, 04:38 PM   #3
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well i know its a long shot but im shooting for that big 300whp....no trany monds yet..and im running a stock turbo..
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Old 09-01-2005, 04:40 PM   #4
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There are a few guys running SR55 on the ej20 but bigger isn't always better. IMHO you started with the wrong car. Right around 300whp you are going to have tranny problems.. At about 400hp you are going to run out of motor.

I think you are going about it all wrong. Ask yourself what your plans are for the car (1/4 mile, AutoX, Highway Racing, Light to Light racing) and plan from there.

And and take a ride in a WRX that doesn't spool till 4500rpm and then say you don't care how soon it spools.
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Old 09-01-2005, 04:42 PM   #5
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Quote:
Originally Posted by superdupersubaru
well i know its a long shot but im shooting for that big 300whp....no trany monds yet..and im running a stock turbo..
Dude 300whp is easy.. Just about any after market turbo will get you there or close to it. If thats what you want I suggest give Deadbolt a call for a 18g or maybe a Super16g and get tuned. Both should get you 300awhp with little trouble.

Since you have a FMIC I think the 18g might just be your turbo.
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Old 09-01-2005, 04:54 PM   #6
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Go with the 18g and get it pro. tuned. But one thing is bothering me, why do you have FMIC, injectors, fuel pump with the stock turbo>?

300whp is possible...no need for debate here its possible, on a vf34. But deffinetly NOT reliable street car. Go with the 16g or 18g and 300whp is easy.

Oh and you are going to break that tranny...
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Old 09-01-2005, 04:57 PM   #7
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I have the fmic and injectors and all that stuff cause im ready for my new turbo...I did everything i need to do first...anyway why will the vf series be more dangrous for my car then the 18g and speaking of which do you have a link with some info on hte 18g...is it a ball bearing turbo? and if my tranys gonna break how can i reinforce that bitch so it wont....or do they make already built bolt up trannys...
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Old 09-01-2005, 04:58 PM   #8
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and on another subject what is the next step after the new turbo and tunning???
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Old 09-01-2005, 05:05 PM   #9
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You are pretty far into the modding scene right now. Other steps would be new shortblock, port &polishing, alky injection is always fun.

vf series is not meant for those power applications. 300whp is the domain of larger turbos. to get a VF3x to push that much hp you are going to need an extremely aggressive tune, or race gas.

You can pick up a set of STi-RA gears for your 5mt(its a mt right?) for around 1300 and have them installed with new bearing and syncros and you will be set to 350ish whp. If your goal are beyond 400whp you will need the STi 6mt or a full dogbox tranny if you want it to last.

The RA gears are much better for racing application as well. Much better gear ratios.

How's that stock turbo reacting to a FMIC, I'm just curious here.
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Old 09-01-2005, 06:18 PM   #10
Chuck H
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For the kind of turbo you're going to need to see 300 whp (like an 18G), the STi pink injectors you installed aren't going to be big enough. They're great for a VF34 turbo, borderline for a VF22, and too small for anything bigger.

That's why it makes sense to sit down with a goal in mind and plan these things out well, rather than just throwing mods at the car and hoping they all work together. For an 18G, you're going to need at least 650cc injectors, and you might even consider 800cc ones.

You're also going to have to have the car EcuTek tuned again once you swap in the bigger turbo. And if you're serious about making big power, you'll want to have it custom dyno tuned rather than relying on anyone's off the shelf map.
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Old 09-01-2005, 11:06 PM   #11
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If you drag race, RA gears probably won't cut it.

Transmission FAQ
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Old 09-01-2005, 11:09 PM   #12
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I'm not so sure a big turbo is good for a street car not worried about turbo lag but with stock 2.0 and valvetrain it will make for a very short power band
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Old 09-01-2005, 11:09 PM   #13
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can a sti tranny bolt up to a wrx chasis,, my performance shop told me that it wasnt possible but id like to see 400 hp someday..and as far as the 18g turbo what manufactures do you all recomend.
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Old 09-01-2005, 11:11 PM   #14
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ballbearing turbo like the FP Green would be a good choice with proper tuning
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Old 09-01-2005, 11:15 PM   #15
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I'm pretty sure the sti tranny will bolt up with proper mounts (anything is adaptable) but the sti 6 spd i'm sure has a longer tail shaft which would require a different drive shaft.
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Old 09-02-2005, 02:15 AM   #16
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Quote:
Originally Posted by superdupersubaru
can a sti tranny bolt up to a wrx chasis,, my performance shop told me that it wasnt possible but id like to see 400 hp someday..and as far as the 18g turbo what manufactures do you all recomend.
I wouldnt mess with that performance shop anymore. Find someone that knows subies!!!!!
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Old 09-02-2005, 02:31 AM   #17
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btw any suggestions on shops in so-cal....thanks
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Old 09-02-2005, 03:14 AM   #18
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yeah there's a bunch of guys running around Denver with STi trannys........don't believe the hype!
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Old 09-02-2005, 03:26 AM   #19
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Quote:
Originally Posted by superdupersubaru
btw any suggestions on shops in so-cal....thanks
Harmanmotive.
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Old 09-02-2005, 12:27 PM   #20
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If you still have the stock injectors you could just mod them for an easy 700cc's of fuel. That stock tranny will last @ 300whp as long as you're not always driving the car like you stole it. Just go easy on it and rarely launch it. Have a buddy here who was running a 12.3 on the stock tranny with an SR30 turbo, around 267whp on a Dyno Dynamics dyno(low reading). Just keep in mind the car won't be bulletproof in that form and you will have to very careful, as anyone should be with the car in STOCK form!
If you want some good reliable power delivery my opinion is as follows:
EJ207 swap
STI RA tranny swap
FP Green 18G

That would easily get you to 300whp and beyond. And that motor would easily handle it...
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Old 09-02-2005, 01:15 PM   #21
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No the STi 6mt is not a direct bolt up. Need the rear drive shaft of an sti or an auto tranny I believe. Not too sure if this is all you need, been a while since Ive done research into it, someone help me out here.

Quote:
Originally Posted by MomentumTurbos
yeah there's a bunch of guys running around Denver with STi trannys........don't believe the hype!
So whats the hype about the 6mt? never heard this. I've heard it'll handle a lot of power and recieve punishment much better than the 5mt or RA gears.
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Old 09-02-2005, 02:17 PM   #22
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Quote:
Originally Posted by Agkelos
So whats the hype about the 6mt? never heard this. I've heard it'll handle a lot of power and recieve punishment much better than the 5mt or RA gears.
I think he means don't believe the shop that told them it wont bolt up.

If you are looking for 400awhp you better start thinking about a new block and tranny now before doing any more mods. As someone pointed out you already wasted money on STi injectors that wont be enough to support the power you want.

I suggest a 2.5L block and a STi 6mt. Sure the ej207 will handle 400awhp but having the extra .5L will give you more and the upgrade is about the same price. Plus with the new WRX having a 2.5L you will start to see more of them for sale and more after market parts for them.

But like I said before and others had said you need to sit down and figure out what you want to do with the car. You can have a 400awhp drag car that is completely different from a 400awhp AutoX car and neither "might" be good for a daily driver. Planning is key.
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Old 09-02-2005, 06:19 PM   #23
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VF35 is a fun turbo. It wont get you the # you are after, but it does spool instantly and will push close to that with 50/50 alch/water injection or race gas. Its got a great torque/hp curve and huge area under them both.
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Old 09-02-2005, 06:25 PM   #24
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Quote:
Originally Posted by MomentumTurbos
yeah there's a bunch of guys running around Denver with STi trannys........don't believe the hype!
Clarify
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Old 09-02-2005, 06:26 PM   #25
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18G
water/alch injection
then protune

300+whp, will be reliable as the water/aclh kit will keep it from deting and keep EGTs lower.

As far as teh STI 6mt goes. You can do it with an Automatic WRX driveshaft, and re-gear the rear diff.

Or you could do it right, which requires teh STI shaft, the STI diff, axles and rear brakes/hubs. Complete drivetrain upgrade

Either way, its very do-able
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