RE: [DML] Re: Carburetors suck.
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RE: [DML] Re: Carburetors suck.



While I hate to jump in here.... but... as someone who has worked a fair
amount of time with both carburetors and FI I thought I'd note a few
things...

First -in general- properly tuned FI and Carbs do equally well at 2 points
WOT and idle.  Its everything in between where FI shines.

Obviously, Bill is more familiar with carbs, and that is ok.  I think if he
takes the time to really learn about FI and become accustomed to it his bias
might change.

Also, I will note that a properly tuned k-jet system is extremely
accurate... not necessarily a performance system (reaction time is not the
fastest) but it does hold stoich very well and has great drivability.

While the k-jet is somewhat complicated (it's mechanical) more modern FI I
find to be simpler and easier to work on than any carb.

Richard

-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of
Martin Gutkowski
Sent: Wednesday, April 11, 2012 1:08 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] Re: Carburetors suck.

A beautiful example of you deflecting that which defeats your own argument.
Did you even read past the subject? 

I'm not even sure you know *how* a carb works... Venturi effect? static
versus total pressure? Surprise me....

Martin

Sent from my BlackBerryR

-----Original Message-----
From: "content22207" <brobertson@xxxxxxxxxxxx>
Sender: dmcnews@xxxxxxxxxxxxxxx
Date: Wed, 11 Apr 2012 19:59:19
To: <dmcnews@xxxxxxxxxxxxxxx>
Reply-To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Re: Carburetors suck.

Point of order: PRV's themselves suck. All a carburetor does is respond to
that suction as it passes through.

Bill Robertson
#5939

--- In dmcnews@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@...> wrote:
>
> "All metering is accomplished by air flow alone"..
> 
> Exactly the point Bill-  What about air temperature?  Air density?
ignition timing? fuel quality?  All moving targets that a carburetor had no
way of compensating for.
> 
> There is a reason complex fuel injection systems have come to replace the
simple (and complex) carburetors of the past. 
> 
> 
> --- On Wed, 4/11/12, content22207 <brobertson@...> wrote:
> 
> > From: content22207 <brobertson@...>
> > Subject: [DML] Re: Carburete a DeLorean at DCS'12?
> > To: dmcnews@xxxxxxxxxxxxxxx
> > Date: Wednesday, April 11, 2012, 3:19 PM Also FYI:
> > 
> > Speaking for the Autolite/Motorcraft 2100 only:
> > 
> > Unless the carburetor itself physically changes (gets dropped & 
> > cracked, stagnant fuel turns to varnish inside, jets are 
> > purposefully unscrewed and swapped out for different sizes, etc) it 
> > will "hold its tune" into perpetuity. Not counting the accelerator 
> > pump and the full throttle enrichment valve -- which has been 
> > disabled on my carb and Byrne Heninger's -- there are only two 
> > moving parts in the entire metering circuit: the throttle plates 
> > themselves. All metering is accomplished by air flow alone, and the 
> > amount of fuel that leaves the bowl through the jets in response to 
> > that air flow.
> > 
> > Bill Robertson
> > #5939
>




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