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A very basic view of intake and exhaust design on a B20. 120-130

posted by  Ron Kwas on  Thu Apr 19 07:02 CST 2018
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last visit: Fri Oct 24 04:03 CST 2014
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Paul;

Thanks for good info on engine flow...I'm no expert so I might have oversimplified, but it seems to me that your explanation: "WHEN YOU HAVE BOTH VALVES OPEN & THE THROTTLE IS LESS THAN FULL: The intake has vacuum in it and sucks exhaust from the exhaust system into the intake manifold, now you are getting more O2 mixed in to the intake charge, leaning it out, hence full throttle mixture can be fine, but part throttle artificially lean." ...does not factor in inertia of either exhaust or intake flows and their results...it would seem the dynamics should be added into the consideration. Thanks also for reference material suggestions!

Cheers






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