07 WRX injectors bigger then Sti's? - Subaru WRX Forum
 
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#1 Old 11-21-2007, 11:46 PM
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07 WRX injectors bigger then Sti's?

I read on NASIOC that the 06-07 stock injectors on a WRX are bigger then the Sti and the Pinks, like 560cc or something. Is this true? If it is, i wouldnt have to upgrade my injectors for a VF39
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#2 Old 11-21-2007, 11:53 PM
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I wouldnt think you would need to upgrade them if thats all you are going for. Evrywhere I have read, they say that they do flow as much if not a little more than the STIs, but seems everyone upgraes them even with the VF39, not sure why.

Joshua
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#3 Old 11-22-2007, 02:08 AM
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They are just as big if not alittle bigger. People upgrade them, but for the life of me I cannot figure out why. I can see an upgraded fuel pump. One reason I would upgrade is if your IDC (injector duty cycle) goes above 90% when you get it tuned. but it shouldnt be that high so I would say you are ok.

Robby
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#4 Old 11-22-2007, 02:12 AM
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The 07 wrx injectors are the same part number as the sti's injector part number, they are the same size. If you install a vf39 make sure to upgrade the tmic, fuel pump, tbe, and get a good tune.
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#5 Old 11-22-2007, 10:42 AM
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Quote:
Originally Posted by sfelix818 View Post
The 07 wrx injectors are the same part number as the sti's injector part number, they are the same size. If you install a vf39 make sure to upgrade the tmic, fuel pump, tbe, and get a good tune.
They are not the same part number that is not possible. Top feed and side feed are different and the 07 WRX injectors are bigger than the STI injectors.
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#6 Old 12-10-2007, 06:12 PM
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07 sti injectors are top feed.
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#7 Old 12-11-2007, 01:40 AM
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I have been told by a Subaru Tech that the 06-07 injectors are a touch bigger than the STi. I cant remember how much bigger(maybe 50cc or something).
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#8 Old 12-11-2007, 05:21 AM
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Um, thats interesting, If I may ask why would the 2006 and 07 need larger injectors then an sti?
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#9 Old 12-11-2007, 05:59 AM
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No one really said they needed them. Thats just what Subaru happened to put in there. I for one am not complaining about it

Joshua
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#10 Old 12-14-2007, 02:40 AM
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so, does that mean I can use the 06 injectors on my 04 wrx?
my friend upgraded his and its just lying around his room....
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#11 Old 12-19-2007, 06:05 PM
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Quote:
Originally Posted by awd4life View Post
I have been told by a Subaru Tech that the 06-07 injectors are a touch bigger than the STi. I cant remember how much bigger(maybe 50cc or something).
I had heard it more like 10-15cc bigger. They're practically the same.

04 STi 16G powered lagless fun
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#12 Old 12-20-2007, 08:40 AM
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the reason most tuners ask to upgrade is for headroom you don't want your injectors to be the limiting factor which would be very possible.
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#13 Old 01-26-2008, 12:23 AM
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Quote:
Originally Posted by sfelix818 View Post
The 07 wrx injectors are the same part number as the sti's injector part number, they are the same size.
Quote:
Originally Posted by robert.lshoc View Post
They are not the same part number that is not possible.

Seems that no one has posted any definitive proof either way. I just got a set of 07 STI injectors from someone on NASIOC. One side is labeled: "Denso 7DGID" and the other side "0580 725 08".

Does anyone have 06-07 WRX blue injectors that we can compare part numbers with so we can see if they are the same or different (since no one is 100% sure) ?



LMK, thanks!

Rob

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