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Post by nvidiaxtc on Apr 26, 2022 0:11:14 GMT -5
I am trying to determine the optimal octane for a 2022 Honda Metropolitan that has the NCW50 motor.
The Manual says 86 unleaded or higher but also says the compression ratio is 12.0:1. It doesn't specify an optimal octane.
When I look up what the optimal octane for a 12.0:1 compression ratio I get 96 octane.
I've only run 87 unleaded so far with out issues but hoping to get a performance boost with the 96 octane since it seems to match that compression ratio. (I could be mistaken)
I'll report my findings once I get my hands on some unleaded 96 and see if there is a noticeable difference. There's a station a few towns over that has some.
Anyone have any experience with this or have any input?
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Post by jbjhillbilly on Apr 26, 2022 0:37:37 GMT -5
Higher octane is better.
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Post by Lucass2T on Apr 26, 2022 3:06:18 GMT -5
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Post by nvidiaxtc on Apr 26, 2022 10:22:33 GMT -5
I think the octane has everything to do with the compression ratio. So it depends if a higher octane will give you a performance boost or not. It's not the fuel that gives the boost with higher octane but how the motor was built to handle a specific octane to increase performance. The higher the octane, the higher resistance to detonation which is good for high compression engines. So I think this video doesn't quite fit the scenario we are talking about here (12.0:1 compression ratio) Any experts out there? Check out what he says at 8:30 in the video you posted. He says specifically that if the compression ratio was 14:1 (high compression ratio) the result would be completely different. I am not an expert by any means and my theory could be completely wrong.
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pili
Scoot Enthusiast
Posts: 277
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Post by pili on Apr 26, 2022 11:29:13 GMT -5
I know that my Zuma sounds different, especially cruising at partial throttle, on 93 vs 87 octane. I try to run 93 exclusively.
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Post by jbjhillbilly on Apr 26, 2022 16:36:21 GMT -5
Most 4t 50cc scooter motors have a higher compression ratio that cars. In this instance, 12:1. Compare that to a 9:1, or 10:1 ratio for a car. Without changing the factory timing, you’d want to run 93 or so. |
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