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Injector upgrade

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Old 06 Feb 2012, 09:27 am
Kevhead's Avatar
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Location: Elgin, Illinois
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Default Injector upgrade

I have an 04 GT with Stage 1 and an S2 Wastegate Accuator dialed in to 13-15 lb. of boost. At WOT I'm seeing Injector Duty cycles in the 85-90 range, and I'm thinking I am overworking the injectors. I was told I need to go with injectors one step larger to bring them in line and get a little more out of the boost I am running. I have the Getrag trans and it all runs well. I do seem to run out of power in the higher rpm's though. Any ideas on what injector size I should look at? Are the stock 04 turbo motor injectors considered already as "S1's"? I would like to swap them out and not get into other changes like a pump upgrade.
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Old 06 Feb 2012, 07:36 pm
xwing777's Avatar
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Join Date: Jan 2009
Location: Taylorsville NC
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Default Re: Injector upgrade

No, you can run 18lbs with stock turbo fine. Plenty of us have been for years. 2004 allready have the larger injectors that have to be changed out on older models.

The important thing is to not run lean when you start bumping boost up and/or changing the tune. If you don't allready, get a wideband air/fuel guage so you can see how lean you are.
2004 Almond GT, autostick - Only car shows, some weekends but with Stage1!
2003 cranberry 5 speed GT - Fishing with a sleeper Stage3 setup!
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