4 cyl efi, 747 or 165

[Bruce Plecan]

----- Original Message -----
From: steve ravet <steve.ravet at arm.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Friday, April 16, 1999 7:01 PM
Subject: 4 cyl efi, 747 or 165

I was just thinking, why not just keep it simple.  It's a boat.  Turn off al
the diagnostics use the TPS, and run a tach signal, and be done with it.
Use maybe a 4.3 TBI, dual TBI and a 747 tune what ya can and the rest with
FP.
Dam prop is a hellofva load and accleration ain't like having 3 gears,
probably get by with a box of rocks for a calibration, and without the
aeration
that a fuel bowl sees, will seem really good.....
   If the pier gas (if that's where ya get it) is as bad as it was 10 years
ago, you can't run much for timing anyway.
  Use a Pot for CTS, and have a tunable mixture as you drive....
Alpha-N forever <g>
Bruce


> 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
>