100% boost at idle - Kawasaki Ninja H2 Forum
 
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post #1 of 4 Old 04-04-2019, 04:43 AM Thread Starter
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100% boost at idle

Has anyone else had this issue.
When idling the boost indicates 102%.
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post #2 of 4 Old 04-04-2019, 04:59 AM
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That's correct, 102% at idle. At 100% there is no vacuum and if it dips below 100% the engine is starving for air, something's wrong in the Supercharger area.
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post #3 of 4 Old 04-04-2019, 05:06 PM
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Originally Posted by Rick150 View Post
That's correct, 102% at idle. At 100% there is no vacuum and if it dips below 100% the engine is starving for air, something's wrong in the Supercharger area.
So this is to indict how much air the charger is getting.
Revving it while not moving too fast will produce less results below 100?
Revving it while at sufficient speeds will increase number above 100?
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post #4 of 4 Old 04-04-2019, 09:29 PM
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Garage
This reading starts the when the key is turned and it measures the pressure in the plenum. 100% is atmospheric at any altitude. It is measured after the SC. 102% sounds perfectly normal. The engine idling with the throttle plates closed will give you a bit of boost. You can get a reading below 100% by opening the throttles at low rpm and the engine can ask for more air than the SC can provide at a low RPM. In this case the engine is hesitating, kinda like a car with the accelerator pump that is broken. At above say 2k it is pretty much impossible.
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