2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

stock injectors and boosting

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Old Jan 17, 2007 | 06:10 PM
  #1  
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stock injectors and boosting

just wondering what kind of boost i can run on my TII s4 swap before having to upgrade on injectors, thanx
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Old Jan 17, 2007 | 07:09 PM
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Stock injectors can handle around 160rwkw to 180rwkw (really starting to stress them at this point and possability of running lean is far increased). The stock fuel pump runs out of puff before this though, so make sure you've addresses that before upping the boost too much
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Old Jan 17, 2007 | 07:12 PM
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Question

i have a walbro 255 lph fuel pump so i dont have to worry about that but do you think you could tell me like as far as psi goes (on the boosting part)
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Old Jan 17, 2007 | 07:19 PM
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Maximum amount of boost is much more dependant on turbo and cooling.
What turbo are you running and what cooler (FMIC or stock top mount) are you using?
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Old Jan 17, 2007 | 07:22 PM
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im using the stock top mount for right now but i think in about 2 months i will be upgrading to a FMIC
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Old Jan 17, 2007 | 07:31 PM
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Stock top mount and turbo setup can handle about 10-12psi. I think 10 psi is optimum as anything more is out of the efficency range of the stock turbo and stressing a bit.

So 10psi should be fine, maybe run 12 occassionally but not all the time
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Old Jan 17, 2007 | 07:39 PM
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Talking

k sounds good, thanx for the info
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