RE carb vs. FI

[Jim Pearl]

Gee I guess that's what happens when you test a carb manifold against an =
EFI manifold like say a TPI. I don't suppose they took that carburetor =
manifold, drilled it for injectors, slapped an air door on it, and ran =
the same tests with a tuned EFI system did they? I haven't seen the =
article but I've heard some of the garbage from friends - "Put a carb on =
it - it'll go faster". Many people don't realize that the torque curve =
etc. isn't a function of how the fuel is delivered so much as it is the =
manifold's tuning. I (IMHO) don't think the "cooling effect" of fuel =
bouncing around a manifold has as much of an effect as having the fuel =
in the right place at the right time in a good suspension.

I'll step off my soapbox now (grin). I've seen a couple of these type =
tests before in the Ford mags. irks me to no end.

Jim
'88 Ford Mustang
Twin turbo 302 (DDMI\Spearco) - DFI


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>From: 	J.W. Harris[SMTP:jwharris at holli.com]
Sent: 	Friday, December 22, 1995 7:50 PM
To: 	diy_efi at coulomb.eng.ohio-state.edu
Subject: 	Re: RE carb vs. FI

If I remember correctly, the article came to the conclusion that fuel=20
injection produced a broader torque curve with less peak horsepower,
the carb produced a higher peak H.P.
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J.W. Harris                           Delco Electronics Corp.
Project Engineer                      One Corporate Center
Powertrain Electronics                M.S. CT40C
                                      Kokomo, IN 46904-9005
jwharris at eng.delcoelect.com
jwharris at holli.com

Of course, all responses are my own and should not be mistaken
for those of Delco Electronics or General Motors.