Should I or Should I NOT? - Subaru WRX Forum
 
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#1 Old 11-24-2007, 10:40 AM
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Should I or Should I NOT?

I have VF39 with stock injectors on my 07' wrx.
I'm pushing 291awhp/321awtq.
Should i upgrade my injectors or not?
### i think my stock injectors r running around 90% of duty cycle...

291.11whp/321.13wtq 18psi
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#2 Old 11-24-2007, 11:04 AM
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i would leave them in there 90% duty cycle is normal.

Dom Tuned 2003 WRX Wagon
251.3 WHP
235.8 WTQ

If it's worth doing, it's worth overdoing
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#3 Old 11-24-2007, 11:48 AM
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I READ somewhere recently that the 07 wrx injectors are actually bigger than the sti ones....
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#4 Old 11-24-2007, 06:13 PM
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how about to changing the fuel rail?
### when i'm WOT, i get check engine light.
only when i'm flooring down.
cylinder #1,3...
after i got the perrin EL header, it's happening less but still getting misfire.

291.11whp/321.13wtq 18psi
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#5 Old 11-25-2007, 02:50 AM
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Yes, the 06-07 WRX has larger injectors than the comparable STi. I think it is only by a few CC's though. Not sure about that WOT CEL though.
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#6 Old 12-18-2007, 11:16 AM
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Did you upgrade your fuel pump?
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#7 Old 12-18-2007, 11:17 AM
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didnt notice this thread was dead
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