New injectors? - Subaru WRX Forum
 
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post #1 of 12 Old 06-23-2009, 08:19 PM Thread Starter
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New injectors?

Hey guys, just a quick question. When i go to stage two with my 04 sti will i need new fuel injectors? I was gonna get new ones anyway just wondering if when i went stage two i needed to do the injectors at the same time, and what kind of injectors should i get? Thanks in advance
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post #2 of 12 Old 06-23-2009, 08:55 PM
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Ask your tuner. For stage 2 not really. And the size of injectors depends on your turbo, your tune all that stuff, but heres a reference:WRX Fuel injector sizing guide STi Fuel injector sizing guide Lgt fuel injector sizing guide, JSC Speed

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post #3 of 12 Old 06-23-2009, 09:15 PM Thread Starter
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Thanks man. And its for stock turbo with hks cbe, helix catted high flow downpipe, with the cobb accessport. Just wanted to know what a good brand would for the injectors
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post #4 of 12 Old 06-23-2009, 09:48 PM
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Well my tuner suggested the deatchwerks ones. If you do go with bigger injectors, get ahigh flow fuel pump also.

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post #5 of 12 Old 06-23-2009, 10:33 PM
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You do not need bigger injectors for stage 2. Keep the stockers until you upgrade the turbo.

rollin on 17's now and they're dirty
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post #6 of 12 Old 06-23-2009, 10:53 PM
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Not needed, but getting a fuel pump and injectors you can max out your stock turbo. Thats your call.

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post #7 of 12 Old 06-23-2009, 11:27 PM Thread Starter
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If i get a fuel pump do i also need the injectors or am i good with just the fuel pump?
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post #8 of 12 Old 06-24-2009, 12:46 AM
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You don't need either right now. Nor for stage 2 and yes you could get the fuel pump without the injectors.

A good rule of thumb is if you need a fuel pump to run your mods safely you are close to maxing your injectors but once again you don't need it for stage 2 which is what your asking correct?

rollin on 17's now and they're dirty
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post #9 of 12 Old 06-24-2009, 01:00 AM Thread Starter
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Yes sir thats what i was asking. Cause i read somewhere that for stage 2 it would be a good idea to get a new fuel pump. So for stage 2 i wouldnt need either new injectors or fuel pump unless i upgraded the turbo?
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post #10 of 12 Old 06-24-2009, 01:17 AM
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Correct. The only STi's that ive read about going with a fuel pump for stage 2 are some of the 07 STi's that's the year when stock maps were crappy.

rollin on 17's now and they're dirty
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post #11 of 12 Old 06-24-2009, 02:09 AM Thread Starter
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Aight thanks guys its much appreciated
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post #12 of 12 Old 06-24-2009, 10:03 AM
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Not exactly "stage 2" but my tuner did believe that the stock turbo is limited by the stock STi injectors. If you're getting a protune, you might consider it even with the VF39/43 still under the hood. Being fuel limited is a waste For a cobb AP stage 2 map do you need upgraded injectors? No. In fact, you can't use that map if you did.

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