Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

injectors?

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Old 01-14-2008, 05:29 PM
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injectors?

ok so i went to db tuned today to ask paul a bunch of random questions and it came to my attention i might need injectors to support my vf 43. i have an 07 wrx i bought brand new last april or so. do i need injectors??
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Old 01-14-2008, 05:35 PM
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No, you don't need them.
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Old 01-14-2008, 06:46 PM
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neg ... our 06-07 are 565cc if im correct. some one correct me if im wrong. just make sure you get a fuel pump for sure. cheap protection
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Old 01-14-2008, 07:45 PM
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so i need a fuel pump now. im not second guessing you but i have seen alot of threads with people just throwin a 39 or 43 on and protune it and your good is that right?
the fuel pump is it needed what happens if i stick with stock?
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Old 01-14-2008, 10:12 PM
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I'm pretty sure you're right, I was thinking around 560cc.

You'll need a form of EM before you can drive your car after a turbo swap. I'd also get a Walbro FP. Stock may be okay, but I wouldn't risk it. Plus it is some POM.
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Old 01-14-2008, 10:16 PM
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injectors always make things better tho! hahaha
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Old 01-14-2008, 10:39 PM
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I think you should get new injectors and then sell me yur old ones....
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Old 01-15-2008, 02:54 AM
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Just looked it up, we have 560cc injectors. No need to have to upgrade when doing an STI turbo swap.

Hey, what are you 420cc guys even doing in this forum?? hahaha
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Old 01-15-2008, 03:27 PM
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so it would be a good idea to get a fuel pump? how easy are those to install
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Old 01-15-2008, 03:42 PM
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Originally Posted by Woodward
Just looked it up, we have 560cc injectors. No need to have to upgrade when doing an STI turbo swap.

Hey, what are you 420cc guys even doing in this forum?? hahaha
just because i run 420cc doesnt mean i know what upgraded injectors do! hahaha.. with a vf 39 i would get a bigger tmic 650cc or 700cc injectors, the walbro fp! that would be a nice setup!
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Old 01-15-2008, 07:41 PM
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Originally Posted by 07wrxguy
so it would be a good idea to get a fuel pump? how easy are those to install
Yes, look for a Walbro 255 fuel pump. The pump is pretty easy to install. There should be tons of instructions online. I've installed 3 and an extra set of hands always helps gettting the pump in/out bc it's a tight space.

Originally Posted by wrxisthebest
just because i run 420cc doesnt mean i know what upgraded injectors do! hahaha.. with a vf 39 i would get a bigger tmic 650cc or 700cc injectors, the walbro fp! that would be a nice setup!
So that's what you'd do with a VF39 setup? lol. That's weird, I have an STI turbo installed and my/our stock injectors are even bigger than an STIs. Stop misinforming people, especially when you're in the EJ25T forum.

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Old 01-15-2008, 07:50 PM
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Originally Posted by Woodward
Yes, look for a Walbro 255 fuel pump. The pump is pretty easy to install. There should be tons of instructions online. I've installed 3 and an extra set of hands always helps gettting the pump in/out bc it's a tight space.



So that's what you'd do with a VF39 setup? lol. That's weird, I have an STI turbo installed and my/our stock injectors are even bigger than an STIs. Stop misinforming people, especially when you're in the EJ25T forum.

wtf man.. ur retarded.. when did i say that u had sti injectors.. ur the ****ing newb.. get ur **** straight man! dont say something unless u have proof!

i may not be an ej25 but who the **** cares... with an ej25 id go with 700cc for sure!

a stock sti has 550cc injectors.... i never said there was a problem with stock wrx injectors on 06-07 wrx's.. i was just claiming that if u wanted to bring the best from the turbo and the fule pump upgrade.. change ur injectors too!

Last edited by wrxisthebest; 01-15-2008 at 07:57 PM.
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Old 01-15-2008, 07:55 PM
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Im a 07 rex, had the vf39 running stock injectors.

Only upgrade that you need to worry about with the vf39/vf43 on your 2.5L WRX is
Walbro Fuel Pump, not a must, BUT DEFF helpful, so just get it
Fuel pump is easy to do, so you can do it yourself.
Injectors, leave em stock, no need to upgrade. You will be perfectly fine running them with the STI Turbo. With the proper tuning, you wont even max them out.
Deff think abou getting Cobb or XPT Map for your car if your gonna do the swap. You dont wanna run around untuned and risk something.



On a 2.0L WRX then.....ya think about injectors, and thats would probably be STI PINKS.

2.5L WRX Injectors flow just as much if not better than STI Pink injectors

Last edited by SpADeZ_WRX; 01-15-2008 at 07:57 PM.
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Old 01-15-2008, 08:04 PM
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wtf man.. ur retarded.. when did i say that u had sti injectors.. ur the ****ing newb.. get ur **** straight man! dont say something unless u have proof!

i may not be an ej25 but who the **** cares... with an ej25 id go with 700cc for sure!
I have proof.

I have my IDC logs to prove we dont need upgraded injectors. So where's your 'proof' that I need more than 560cc injectors when doing an STI turbo swap?

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Old 01-15-2008, 08:08 PM
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Originally Posted by Woodward
I have proof.

I have my IDC logs to prove we dont need upgraded injectors. So where's your 'proof' that I need more than 560cc injectors when doing an STI turbo swap?

dude.. i never said that u need them! geez!

all i said was that the stock injectors wont put out what the vf39 can put down!
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