Now lets say I have someone tune my emanage using the stock injectors with whatever# pulley and all my mods in mind so that it has a good A/F and timing is good etc. etc.

lets say that a few days of driving and I want some more power so I put in some RC 550 Injectors but it will be a few days before I can get back to the dyno to have them fully utilized by the emanage.

will the emanage recognize the larger injectors and cut back on pulse width to maintain the same rate of fueling or does it run on pulse width only and will just run rich as hell until i get back to the dyno.

What i am getting at is I want to use my buddy's map who has the same setup I am going to have until I get to the dyno but he uses stock injectors and I am putting 550s in so when I get a smaller pulley I won't have to worry about it. Will this work?

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alex

 

There is am Injector Compensation setting in the E-manage that allows you to enter the size of the original and new injectors and should allow you to run the 550s directly. That said, I never had much luck with it.

 

meaning that it will compensate automatically for the new higher flowing injectors? how big are the stock injectors?

 

forget that. I just repeated you. what you said is it will work without running super rich right?

 

You enter the size of the stock injectors (360cc) and the size of the new injectors (550cc) and it does the maths and divides the MAP signal by 0.65 (360/550).

This assumes the the MAP:Fuel ratio is linear and in the middle it is, but at extremes it isn't. That is why Greddy say injectors up to 50% bigger (they say 150% bigger but the mean 150% of or 50% bigger). With too large a difference the figures are always at the extremes.

550cc is the edge of what is acceptable with the E-manage. I would be very careful driving before tuning and would probably want to do some tests with and A/F meter first to ensure it is safe.

 

I have an AEM UEGO that I am gonna be using so I will be able to tell if I am gonna blow up or not. You wouldn't happen to know the formula (i forget) for max horsepower supported by a specifc injector size (all things being equal and that most injectors will never run above 80-90% duty cycle) would you?

the emanage will support larger than 550cc with proper tuning right? you don't have to use that function to have larger injectors?

 

anyone know what pressure the FPR should be set at for 7psi boost and 550cc injectors? what is stock FPR?