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when will injectors be needed?

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Old Oct 5, 2005 | 04:58 PM
  #31  
propellerhead's Avatar
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From: Agrestic
Originally Posted by Gruppe-S
Injectors are not needed until you have a full GT turbo upgrade or running extreme psi with the stock turbo. However....your tuner should be able to tell you what % of your injectors are running. He can help you determine what size injectors you will need to match with your application.

Thanks,
Tom
I respectfully disagree. A Buschur Stage 3 setup will push the stock injectors into the 90%+ range @ 21psi of boost. I've got log data to support my assertion.

However, I do agree with your advice that folks should consult with a reputable tuner to help them determine the correct injector size and fuel system modifications.
Old Oct 5, 2005 | 05:11 PM
  #32  
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i've decided to stick with my stock injectors and my fuel pump is on the way
Old Oct 5, 2005 | 07:13 PM
  #33  
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From: on the edge of sanity
do you guys need to run AFPR's with bigger pumps?
Old Oct 5, 2005 | 08:05 PM
  #34  
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Originally Posted by rghli
i've decided to stick with my stock injectors and my fuel pump is on the way
You've made the right decision.
Old Oct 5, 2005 | 09:17 PM
  #35  
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Originally Posted by rghli
i've decided to stick with my stock injectors and my fuel pump is on the way
Right on
Old Oct 6, 2005 | 02:00 PM
  #36  
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damn. safc people said go for the injectors. reflashed people said i dont really need them. i would stick with my tuner. yes no yes no yes no...
Old Oct 7, 2005 | 06:57 AM
  #37  
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From: Agrestic
One way or the other you're going to need to upgrade your pump. My experience has been that upgrading the fuel pump raises the base fuel pressure to 52psi. YMMV. This will effectively increase the output of the stock injectors to approximately 605cc/min.

As you probably know, both fuel pump upgrades AND larger injectors require a ECU reflash to scale the fuel maps. I'm suggesting injectors and a pump upgrade at the same time since you can tune for both with one reflash and be done with it. Once you've flashed for the fuel system mods, pretty much all other mods are VE related can be handled by the piggyback of your choice, SAFC, UTEC, Xede or whatever.
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