carb vs. efi

[Harms, Rick]

My Holley Pro-jection died for the third time a couple of months ago.  I   
am not going to purchase a fourth computer.  So what?
I replaced it with a Holley double-pumper.  Now I am having to learn all   
about "holes", "transition slots", etc.  I like computers better.
The carb is fine in drag racing, a binary situation mostly, on or off. It   
is easy to get the correct mixture in a very narrow RPM range.  For "real   
racing" :-),  (sorry, I prefer road racing, but have nothing against drag   
racing)  the mixture needs to be controlled over a much larger RPM range.   
 The computer does that "good".  You also avoid sloshing bowls and vent   
problems.

The speed shop that does my engine's machine work is owned by a   
dyed-in-the-wool drag racer.  He knows double-pumpers backwards and   
forwards.  He  does not understand computers, so, obviously they are not   
any good.  The fact that my ECU keeps dying just reinforces his opinion,   
but we still have friendly "discussions" on the pros and cons of both.

I am hoping to find a replacement ECU for my Holley throttle body that   
does not cost an arm or leg.  These lists help me a lot to get ideas.   
 Who knows, maybe I will decide to use the EEC-IV and intake; however, it   
is doubtful because I do not have a lot of hood clearance in my car (a   
427 Cobra S/C replica using a 351W punched out to 408).

That is my $.02 worth.  From now on I will just keep "listening".


 ----------
From: 	Tom Cloud[SMTP:cloud at peaches.ph.utexas.edu]
Sent: 	Friday, September 12, 1997 1:33 PM
To: 	EEC-EFI List; diy_efi
Subject: 	carb vs. efi

WWIS MIME Decoded (2.B) on <uf4124uh>, message parts:
part1.txt (text/plain)
 ------------------------------

he'p me out here .... have a friend that's a died-in-the-wool
Holley carb fan and thinks I've made a big mistake going to efi
(I'm not racing)

He's an engineer, has worked as a mechanic, owned a speed shop
and raced for a number of years, so I regard his opinion.

He argues that no top racer (NHRA is his game) runs efi.  I admit
that's probably right, but the reason isn't because it's not better,
but rather that it's too danged difficult to change at the
track ....

what do the Formula 1 guys (and others) do ??

Like I say, he'p me here ....

 - he says he feels the carb gives better atomization -- and I
can see that a constant fuel flow rather than pulsations might
(though the pulsations are at high pressure)

 - the efi gives better fuel control, I'd think, though that may
not be important for racing

 - clearly port injection gives better fuel distribution -- but,
at 8 to 12 k does it matter ??

  ???? anyone ??

Tom Cloud

    Just because you're paranoid doesn't mean they're NOT out to get you   
!!


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