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SU Guru needed. B20 Lean Stumble 120-130

posted by  Ron Kwas on  Tue Mar 6 13:13 CST 2018
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last visit: Fri Oct 24 04:03 CST 2014
[RELATED]

Tracy;

Where did these carbs come from? Are they really SU clones? How are they configured...most importantly: What Metering Needles?, and are they correctly installed...what is jet position unchoked? Is FuPu able to keep up with demand at Revs/Load. Are Bowlvalves set correctly?

If your WBO2 meter is indicating very lean, can you enrichen to compensate by lowering Jets (pulling Choke)?

No oil would result in exacerbating lean stubble on fast Throttle opening...oil should be 20W or ATF.

"needles drop as they should" ...needles don't drop...Dashpots, into which MN are installed rise and fall...not to pick your info (on which I do compliment you for being as complete as you could be) apart, please use standardized terminology, so that everybody is talking about the same thing...

Have you seen these videos and you you understand them?:
SU Part 1. https://www.youtube.com/watch?v=7GRAcqDySog
SU Part 2. https://www.youtube.com/watch?v=60Bj_2cZQnc

Good Hunting?






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