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Hiflow injectors

PHaT MR30

By PHaT MR30,
in Engines & Forced Induction

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Steve Grand Master

Steve

Posted
Posted

No I wouldnt recommend this. Sometimes people get good results, sometimes not.

If you dont mind gambling, and you feel lucky go for it.

If you dont mind spending a little more (and tey arent that expensive at the moment, even new) and want the peace of mind knowing that you have a reliable know good product - with better resale value, buy proper aftermarket injectors.

my 0.02

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SLY33 Mentor

SLY33

Posted
Posted

what tricks do you have up your sleeve to lower the duty cycle? My injectors hit 97.7% duty cycle the other night ;) Its going in for more fuel pressure and a tidy-up tune tomorrow..

even with duty cycle so high, the AFRs are fine and theres no knocking. Why do people say dont go over 80% duty cycle? (it only seems to go into the 90's on cold nights)

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Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi Sly33, all engines need a richer mixture to accelerate, so if you are driving along at 97% and put your foot down there is no capacity left in the injector to add fuel, so the engine will either bog or only accelerate slowly. That's the bad news. The good news is the 97% injector duty you see probably happens as you are accelerating and using that extra fuel. You have to check injector duty at constant throttle (not accelerating or decelerating) to abide by the 80% rule.

Also when an engine is cold it needs a lot richer mixture, if the injectors have no cpacity for this richness it will run bad when cold. Same when you have the air con on, turning the power steering, hi beam or running that mega stereo.

Hope that helps

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