<VV> OT / EFI vs. Carb

[jvhroberts at aol.com]

 More eloquently said than the way I stated it, but yes. Here's more references:

http://www.carcraft.com/techarticles/116_0308_efi/index.html

http://www.gmtuners.com/history/vs.htm

And to see how easy it has become:
http://www.fuelairspark.com/ezefi/default.asp

Thanks, John!

 

John Roberts
 

 

-----Original Message-----
From: John Kepler <jekepler at amplex.net>
To: jvhroberts at aol.com; xramzl1 at yahoo.com; virtualvairs at corvair.org
Sent: Fri, Aug 20, 2010 7:28 am
Subject: RE: <VV> OT / EFI vs. Carb






The very first error is carbs make more HP than EFI. Given both are

optimized for making HP, EFI will ALWAYS beat a carb. Less air flow

resistance, better air/fuel mixing, and the obvious one, far better A/F

control. 



. 



 

In addition, one of the areas that is MOST effected by EFI and horsepower is

"area under the curve"...the TOTAL HP produced by the system.  You CAN make

a carb match EFI horsepower at a given RPM point without increasing the

complexity of the system inordinately (use a Rochester or Holly as your

model).  But to maximize the "area under the curve" you are rapidly running

out of capability to do anything but a "half-a-hammer-handle" level of

efficiency.  Even by accepting tremendously complex carb systems (Weber or

Solex) that are frankly, at the limit of practicality, the "area under the

curve" with carbs is still highly restricted.  EFI gives you the entire

enchilada, and all the HP you can get from a given displacement and

head-flow based on the software design criteria (things like emissions).



JEK