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



Speaking to your third paragraph:

Multiport injection is not possible on my engine via the heads -- they were never drilled for injector bungs:
http://sphotos.xx.fbcdn.net/hphotos-ash3/548049_364779660233957_100001057778755_1087064_1254912983_n.jpg

I also only had a couple of weeks to get this engine installed and running before DCS'04, so I did what was fastest and easiest under those circumstances: I made an adapter for the sand cast manifold that came with the engine and carbureted it:
http://a5.sphotos.ak.fbcdn.net/hphotos-ak-ash3/535216_370045179707405_100001057778755_1103017_2096463362_n.jpg
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-prn1/535216_370045189707404_100001057778755_1103018_11088126_n.jpg
Been that way ever since.

You are absolutely correct that I am intimately familiar with carburetion, especially as I install it on DeLoreans. To the best of my knowledge there are only two people offering so called "kits" (everything necessary in a single box). I am the only one making his own intake manifolds (Byrne modifies K-Jet manifolds):
http://sphotos.xx.fbcdn.net/hphotos-ash4/426878_353707528007837_100001057778755_1052731_87551549_n.jpg

Every single conversion I have done is standardized. Jim's  installation (the latest) is virtually indistinguishable from Farrar's (the first). This allows carbureted owners to answer one another's questions rather than relying on me. Because I use Ford carburetors, they also have the option of asking carb specific questions to anyone who deals with Mustangs, F-150s, Galaxies, LTDs, T-Birds, etc.

A fellow in Texas is already finalizing a DeLorean EFI kit (Beta testing on Shannon Birdwell's car), so there's no reason for me to duplicate that effort. Besides, I've already rounded the learning curve on carb conversions, and have perfected a standardized design that can be repeated as many times as necessary. Of course there is not going to be a mass exodus to carburetion, which is actually quite fortuitous given the significant labor involved making my conversions (everything is hand made, from the intake manifold to the fuel pump carrier, to the fuel filter bracket, to even the lid for the air filter). I average 4 conversions per year, which is more than enough for one person. 

Bill Robertson
#5939

--- In dmcnews@xxxxxxxxxxxxxxx, "DarkStar Media" <darkstarmedia@...> wrote:
>
> 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@...>
> 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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> 
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