4 cyl efi, 747 or 165

[steve ravet]

I've been looking at ECMGUY's stuff, and am now wondering which ECM to
use for my boat project.  It's a mercruiser 470, 170 hp, 4 cyl, 224 CID
(3.6L), aluminum block w/a single ford 460 head.  I want to add TBI
injection to it.  I got a 748 for the project but have decided to punt
since there's no ECMGUY paper for it :-)

I like the 747 because it's simpler but there's no stock 4cyl
calibration.  According to ECMGUY valid values for cyl select are
3,4,6,8, which means it might even work on a metro (ha).  I was thinking
4.3L calibration, change cylinder select to 4.  4.3L is kinda close to
3.6.  I'll probably only use fueling for now, worry about hooking up
ignition later.  I read in the archives about 4 cyl and 747 but it all
looked like "theory".  Has anyone set the cyl select to 4 and put it on
a 4 cyl?  What about using a 7.4L calibration, cyl select to 4, and only
hook up one injector?  

Or 165.  There are 4 cyl TBI calibrations available but the
displacements aren't as close.  Plus I don't know if the tables are the
same for the L4 TBI versions of 165.  Does anyone know if ECMGUYs 165
stuff applies to L4 engines?  Can anyone contribute L4 TBI images for
comparison?

--steve

-- 
Steve Ravet
ARM, INC
steve.ravet at arm.com
www.arm.com