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

ihi vf34 turbo question (do I need STi 'pinks' for an '06 WRX?)

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Old 10-26-2006 | 06:58 PM
  #16  
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Car Info: 05 WRX 4EAT (VF34'd and FMIC'd)----sold :(
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Originally Posted by Mr. Furley
I got a vf39 for $300.... got me to a 12.90 1/4 with a stock intercooler.... ALL YOU NEED is the turbo, gaskets, accessport, exhaust, and a bigger intercooler. You DO NOT NEED injectors or a fuel pump.
I concur.

Nice job with the 12.9!
Old 10-27-2006 | 11:43 AM
  #17  
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now that we know theres no need for injectors upgrade.... is there a need for upgraded fuel pump of is the 06 also have a better than previous years pump??
Old 10-27-2006 | 11:44 AM
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Originally Posted by Mr. Furley
I got a vf39 for $300.... got me to a 12.90 1/4 with a stock intercooler.... ALL YOU NEED is the turbo, gaskets, accessport, exhaust, and a bigger intercooler. You DO NOT NEED injectors or a fuel pump.
never mind answered my own question.
Old 11-23-2006 | 02:07 AM
  #19  
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can the fuel pump support a 16g?
Old 11-23-2006 | 12:25 PM
  #20  
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Originally Posted by wrXtian
can the fuel pump support a 16g?
Bigger injectors typically require a higher flowing fuel pump. If you're running stock injectors, then the stock fuel pump will suffice.

So the next question would be, can you run a 16G (or "BIG" 16G) on the stock '06 injectors?
Old 11-23-2006 | 12:51 PM
  #21  
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Originally Posted by Superglue WRX
Bigger injectors typically require a higher flowing fuel pump. If you're running stock injectors, then the stock fuel pump will suffice.

So the next question would be, can you run a 16G (or "BIG" 16G) on the stock '06 injectors?
I know people running 20Gs (barely) on pinks, so I think you'll have plenty enough room for any of the 16gs
Old 11-23-2006 | 01:55 PM
  #22  
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I would highly recommend upgrading your fuel pump. The OEM pumps are very inconsistant once you start pushing them and about 20-30% of them run out of fuel with any sort of turbo upgrade.

As far as the guys saying you should get a bigger turbo, I'd suggest taking that with a grain of salt. The VF series turbos are great on the 2.5 if you're after amazing response and good overall power. The 18g and 20g give just a bit more top end power but they really reduce response significantly... for my personal uses, the trade-off is just not worth it. The vf34 is a great turbo choice for a great ballance of power and response.

Thanks
Old 11-27-2006 | 07:25 PM
  #23  
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Hey Ed,

Would the Big 16G be a good upgrade for the 2.5 with maybe just a little more headroom above a VF34? I have a stock 06 wrx and am coming from a Stg 4 02 WRX with a VF30 and want just a little more power than that set up. I live in Cali and my car will never see meth injection or race gas. So my future upgrade path will most likely look like this--- Cobb AP, turboXS stealth back, prodrive axleback, fuel pump, larger top mount intercooler and different turbo.

I live in Vacaville so you will more than likely be seeing me in the future.

Would change any of the above mentioned items?? My car is also a wagon and that is the reason for my exhaust choice, I might even go with a STI axle back.

Thanks Dennis

Good Luck with the new shop!!
Old 12-01-2006 | 07:02 AM
  #24  
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The stock pump on the '06 is a <145L/hr pump(the pre-'06 was 130L/hr) but I would still upgrade the stock pump for any non-vfxx turbo.....and IMHO, an 8cm 18g or 8cm FP Green is the better choice for a 2.5 street turbo
Old 12-01-2006 | 03:13 PM
  #25  
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Just one more question. If I went with the 8cm 18G would you do it with a TD05 or TD06 configuration?? It seems like the TD05 config is the more widely available and would spool faster making it a better street turbo.

Super
Old 12-01-2006 | 06:17 PM
  #26  
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Originally Posted by SuperHawk
Just one more question. If I went with the 8cm 18G would you do it with a TD05 or TD06 configuration?? It seems like the TD05 config is the more widely available and would spool faster making it a better street turbo.

Super

td05....no doubt
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