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| What is the best cruise speed/RPM for a V355/V338 https://www.smwebhead.com/phpBB3/viewtopic.php?f=6&t=13186 |
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| Author: | Ondatboat [ Tue Jul 15, 2014 12:07 pm ] |
| Post subject: | What is the best cruise speed/RPM for a V355/V338 |
Hey folks ... I have had my 355 for 2 summers now and have really been enjoying the boat. But I am wonder what the best (most ecominical) cruise sppeed is? I have cruised any where from 3500 RPM up 4200 RPM .... it all feels good but I figure there must be a sweet spot .... Any ideas out there? |
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| Author: | efollis [ Tue Jul 15, 2014 3:02 pm ] |
| Post subject: | Re: What is the best cruise speed/RPM for a V355/V338 |
Lots of hours this past week in my 348 (2005), and depending on gas / water on board, I found 3400 rpm was perfect and gave me around 29 mph on GPS. Lower rpm brought me off plane in large chop or sharp corners, and 3700 gave better speed - but I was in no big rush. This was with 5.7 stern drives. |
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| Author: | mkivbren [ Fri Jul 18, 2014 9:15 am ] |
| Post subject: | Re: What is the best cruise speed/RPM for a V355/V338 |
I just sold my 338 and ran her 9 hours straight with the new owners for delivery. No flow meters but we did surprisingly well at 3750-3800 rpm, about 28.5 mph ave. Engines are the 6.2 mercs. edit - to concur with jinizi, I estimated 1.2mpg. perfectly clean bottom keep in mind! |
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| Author: | jnizi [ Fri Jul 18, 2014 10:37 am ] |
| Post subject: | Re: What is the best cruise speed/RPM for a V355/V338 |
I see about the same, 3800rpm is about 29 mph and we are about 1.1 - 1.2 mpg. We have the 6.2 w. Bravo 3. |
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| Author: | Paul I. [ Fri Jul 18, 2014 11:32 am ] |
| Post subject: | Re: What is the best cruise speed/RPM for a V355/V338 |
I have a Sig 290, BUT I would install 2 flow meters and connect them to your GPS. This will give you MPG an GPH. Sea/lake conduction change from time to time. So your speed and trim will to. So now you can get the most out of it any time. |
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