Big Injectors in Little Engine?

[Chris P.]

>From a mechanical standpoint, you can reduce the amount of fuel pressure. I
don't have a formula to calculate it. I don't think it's directly linear
because of the pressure/vaccuum of the manifolds, but I also haven't had
time to put any long thought into it. So this is just my $.01
Might turn into ALOT of $.01's if I can't reprogram my Nissan ECU...

PS. There are also operating voltage and resistance issues to verify. Not
all injectors are controlled the same.

HTH, Chris P.



> Are there any comments on this line of thought? ->>>
>
> What if I was to put a set of SVO 24 or 30# injectors in a 305 TPI MAF?
> They're cheap, and it would offer me peace of mind (kind of like the new
> harness did). Could they be tamed to work well in a 305?
>
> The rationale is to replace the existing suspect injectors while planning
> (budgetarily) for future larger-displacement applications. What kind of
> issues am I likely to run into? Obviously, the FI sizing params will need
to
> be spec'd out. S-Ware mods are within grasp. There may be more fundamental
> issues though, right?
>
> I'm guessing there may be some problems with the pulse width correction
> requirements at small-width ranges, because the larger injectors will be
> open for a much shorter duration particularly at idle. Thus, the effect of
> delays and such opening/closing may become more significant and require
> compensation. Perhaps as the pulse width becomes quite small at idle (like
> 500RPM 305 would ask for), the fuel delivery would become inconsistent as
a
> result of the predominant open-close time. There has been discussion here
> recently on related issues, so I wanted to feed from your experiences if
> possible.
>
> Since I'm considering this near-term, I wanted to place it before the
group
> for comment and judgement. All answers welcomed.
>


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