I'd recommend checking out some of the articles on the Dime Quarterly.
Though this article is down-draft related, it has some good carb info...
http://www.dimequarterly.tierranet.com/articles/tech_carb_tuning_guide.html
Dan Zubkoff
San Mateo, CA
>From: "Tom@Datsun2000.com" <tom@datsun2000.com>
>Reply-To: "Tom@Datsun2000.com" <tom@datsun2000.com>
>To: <ambradley@frontiernet.net>, <datsun-roadsters@autox.team.net>
>Subject: RE: O/T Tuning single DCOE on J15 engine
>Date: Tue, 3 Aug 2004 02:05:38 -0700
>
>I am interested in this one too. I have a L16(? 1600cc OHC) coming with a
>single 40DCOE151 side-draft that is probably full of OLD gas and will need
>a
>good cleaning. Pulling some of the tubes out I found black sludge on the
>bottom of two of them (the same tube on each side of the carb near the
>intake manifold).
>
>It sounds like there is a place where I can check the jet sizes and maybe
>learn about setting the carb up for the car. Does anyone have the links to
>that information?
>
>The current problem is that the engine dies if ANY throttle is added. In
>order to run the choke must be at about 1/2 travel between off and full on.
>I looked for sinking floats and went through all of the jets to see if any
>were plugged. I found a bit of dry coating on some of them and cleaned
>that
>out, but it was no help.
>
>Tom
>69 2000 - Mr. Hyde
>68 1600 - Barney (purple)
>Portland
>http://www.datsun2000.com
>
>-----Original Message-----
>From: owner-datsun-roadsters@autox.team.net
>[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of
>ambradley@frontiernet.net
>Sent: Monday, August 02, 2004 5:05 PM
>To: datsun-roadsters@autox.team.net
>Subject: O/T Tuning single DCOE on J15 engine
>
>
>I put my single 38DCOE on my J15 engine today and fired it up. I
>purchased new jets, sized based on website recommendations. Idles ok
>but has the infamous bog when I hit the accelerator. A look online
>shows that the culprit is often the accelerator pump, which needs to
>allow more fuel when the air velocity drops when I hit the gas pedal,
>but that doesn't appear to be an easily adjustable thing like the jets
>are.
>
>Anyone on the list a DCOE expert? What do I need to do to get it to not
>bog when I hit the throttle? And just as importantly, who sells DCOE
>linkage parts so I can actually attach the carb to my gas pedal? :-)
>
>***
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