Should I go bigger when buying injectors?
02-22-2009, 06:21 PM
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Should I go bigger when buying injectors? Hey guys I need a little help with injector size. Right now all I have done to my car is the normal bolt ons. Recently I had a cylinder missfire and it turned out to be a clogged injector. I replaced it but I'm sure my all of my injectors are dirty and I want to get a new set. I'm looking at the ford red top 30# injectors. I plan on 243 heads and a medium cam in the near future. My question is do you think these will be big enough after the heads and cam? They are 30#'s at three bars right, so what will they put out at 58 psi? I'm also going to get an ajustable FPR at the same time, so can I go ahead and install them and bump the pressure down to 3 bars until I get the heads and cam so I don't run so rich? Thanks
02-22-2009, 07:27 PM
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No, don't change the fuel rail pressure down to 3 bar!!!
30# at 3 bar will be about 34# at 4 bar. They should be plenty for you, but if you plan on adding nitrous or anything...I'd step it up a little bit.
30# at 3 bar will be about 34# at 4 bar. They should be plenty for you, but if you plan on adding nitrous or anything...I'd step it up a little bit.
02-22-2009, 07:31 PM
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This is probably a dumb question, but why can't I bump the pressure down to three bars. Wouldn't they still be putting out more fuel than my stock injectors? I thought 30# 3 bars were 37.5# at 4 bar? Confused?????
02-22-2009, 08:13 PM
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let me try to clarify this. A svo red top at 43.5 flows 329 cc/mn or 31.35lbs. at 58 psi the same injector flows 380cc/mn or 36.2 lbs. The SVO Red top is rated at 39psi not 43.5 as most.
02-23-2009, 12:22 AM
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OK thanks for the clarification, but my question is that until the heads and cam couldn't I run these injectors at 43.5 so I will be closer to my stock injector output so that I don't run really rich. Thanks for the help every one
02-23-2009, 02:52 AM
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