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  #41  
Old 2 Weeks Ago
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Good on you, enjoy it!
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  #42  
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Default Hmm

Quote:
Originally Posted by hondo View Post

Let's see if this works! The open tube connects to the pitot per the OP.
The line hooked to the steel tube on the back side of the carb is on a vacuum port.
Not sure how it will affect mixture that way
Might just cap it off.
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  #43  
Old 2 Weeks Ago
hondo hondo is offline
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I knew you would get it done! Congrats on the Drag Strip class!

I know on my NA Sportster I had to go to a 50 pump jet to keep from going way too rich on the dyno, ran better on the street also.

Something else I've done is I aim the pump jet stream at the divider in the manifold. I know, Mikuni says to aim at the needle, but, with the 50 pump jet the squirt lasts long enough for the needle to be up out of the way of the stream and then the stream hits the rear cylinder's manifold port. No way the front cylinder is getting its fair share of the extra fuel. My way, when the fuel stream hits the manifold divider it turns into a fog/mist/droplets of fuel centered in the manifold. Mikuni's way, when the needle is up out of the way the stream blasts the rear cylinder manifold port and the fog/mist/droplets is biased to the rear cylinder.

Do you feel that, "I’m not getting enough boost reference to compensate the fuel delivery", is no longer an issue? The fellow I'm conversing with that had a 80" BT with a 42mm Mikuni, 138hp then it pulled the cylinder studs, said he had to move and enlarge his pitot tube to get sufficient boost reference to his fuel pressure regulator.
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