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Re: newby

Andrew Plunkett wrote:
> > What advantages does the 747 have to a 748?  Isn't the 748 for V8?

Oops, I meant to ask; Isn't the 747 for V8?

Ludis Langens responded:
> The '748 is for 4-cyl engines with a single injector TBI unit.  The '747
> is for V6's and V8's with a dual injector TBI.  The '748 is newer
> technology - it has a 8192 baud serial link while the '747 is 160 baud.
> Both are transmit only though.  The '748 has a hard wired limp-home
> calibration while in the '747 it is changeable.  Interestingly, the '748
> was used on three different sized engines (2.0, 2.2 and 2.5) from two
> different families.  GM must have sized the TBI to match the displacement.

Thank you for the clarification.

Can the 748 be wired to four seperate injectors, firing at the same time?
What impedance and flow rate would be recommended for 165hp, 2.2L, Four cyl?

Andrew Plunkett

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