sequential efi on 440?

[Mike Williams]

Thanks Bruce and Scott. Sounds like a 208 deg @0.050 would be alright. I
have 3.21 gears in this truck so I assume i'm looking for torque as long
as the drive train can stand it. Now if I can find some prices on seq
efi I can get started.  Mike

bruce plecan wrote:

> Gotta agree with Carl on the cam timing
>
> Two other items, in passing, the Map type sensors will
> generate very erratic idle voltages, and the ecm will
> just folow that.  Dampening the signal mechanically,
> and elec I tried neither with any good results.  I almost
> beleive there may be some inertia in the diapharm
> (of the sensor) itself which causes part of the problem.
>   I'm running a 224d @.050, and it took alot to get it
> to idle.  Meaning trying numerous timing mixture
> combinations, and reworking the pintles on the IAC.
>   On the MAF type systems if their is any reversion
> the MAF sensor can get confused, it generates a
> signal proportional to air flow, either way, so you
> may have very rich spots which will need correcting,
> in the fuel tables.
>   Given enough time you can get it, but be prepared to
> spend a BUNCH of time getting it right.
>
> This is a chart of my last chip  the top being Kpa
> vertical rpm  and the entries VE (mixture)
>             20  30  40  50  60  70  80  90  100
> 400        0    0    0  16  16  36  41  50  54
> 800        0    0    0  16  18  39  47  52  54
> 1200      0    0    0  29  45  50  51  57  60
> 1600      0    0   25 46  50  51  54  58  61
> 2000      0    0   51 49  51  53  57  59  62
> Getting those jumps right is a 1 by 1 change and
> drive, item.  As errattic as those numbers are, the
> motor is as smooth as silk (well for a EFI rump rump
> cam).
> HTH  Bruce     Cone hats are kewl..