[Diy_efi] P&H vs. sat (was: Diy_efi Digest, Vol 21, Issue 1)

[Adam Wade]

--- ScottyGrover at aol.com wrote:

> The systems I was referring to were sequential
> systems (Type 3 VW, Datsun 240Z)

Ah, I misread your previous post.

While if you already had P&H injectors and didn't want
to spend the money on hardware to handle that many
low-impedance injectors, but also didn't want to spend
the money on high-impedance ones, I guess I could see
using resistors in series with the existing
low-impedance injectors.  You lose most of the
advantage that P&H injectors have (wider dynamic range
and better control at short opening durations) by
running them that way, but it is certainly possible to
do.  Running them with a saturated drive ECU without
the resistors will cook the power transistors in the
ECU post haste, and is definitely a no-no...

Since the guy wants a different style of fuel rail and
the injectors he's looking at are high impedance, he's
probably better off getting a less-expensive ECU
designed to drive sat. drive injectors if he wants to
run them sequentially.  Then he has his injectors, he
has his newer-style fuel rail, and he has haved money
on the ECU; the only thing that might suffer slightly
would be idle control, but if he is doing something
requiring more fuel than stock from one of those V-12
engines, chances are its behavior at or near idle is
not of too great importance to him.  ;)

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