EFI musings

[Tony Bryant]

> 
> -> Carbs (for my application) are worth $1500 as opposed to the $300 for
> -> my EFI+Ignition
> 
>  $300?
> 
>  I'm involved with an EFI project right now.  We paid $300 for the
> process controller board alone, though it's a pretty fancy piece with
> its own operating system and lots of A/D.  $50 for the addressable
> prototype board.  $75 for AMP O-ring-sealed bulkhead connectors for the
> main harness.  $40 for Weatherpak pigtails for the sensors.  $30 for a
> pair of used dual coils.  $45 for a salvage EFI intake which happened to
> fit my engine, and it came with injectors, rails, throttle body, TPS,
> and idle control solenoid.  I got a fuel pump for free.  We just sent
> off a $200 order for injector and coil drivers, power transistors, and
> assorted electronic miscellanea.  Managed to find an appropriate MAF for
> $5; knock sensor is $35, MAP sensor is $40, MAT and CTS $10 each.  Even
> with some killer deals on parts it adds right on up there, and we're not
> done yet.
> 
>  Sounds like some awfully expensive carbs and astoundingly cheap
> electronics.
> 
Lets see. 
$130 for 8 injectors, 
$80 for fuel pump, 
$20 for fp reg, 
$40 for 50 ft of copper pipe (to make rail & return fuel line). 
$70 for assorted (second hand) electronic components, 
$20 for blank PCBs & etchant. 
$20 for case. 
$40 for crank angle sensors. 
$2 for TPS. 
No MAP. No MAF. No knock sensor. No Idle control solenoid.
$20 for wiring. 
$50 for other miscellaneous crap.
Using existing DHLA40s as throttle bodies.
Uses existing manifold (heavily modified to accept injectors)
Uses existing Coil.

Total so far = NZ$492 (OK, so I underestimated a bit). And one year 
of my spare time....

As for carbs, I've been told I'll need at least a pair of DCOE/DHLA48 
and would probably be better with 55mm carbs. Very rare, and 
extremely expensive. Manifolds to fit that size are a serious problem 
too.
***********************************************************
* "Insanity is the only sane response to an insane world" *
*                 >> bryantt at fp.co.nz <<                  *
***********************************************************