Hello all- Going to be Seatrialing 2004 270 FV on Thursday. 350 mag with B3 drive. What are the target performance numbers I should be looking for? Top Speed (thinking ~35kts.)? Cruise speed and RPM? Max RPMs? Thanks.
Okay. Usually the surveyor is onboard during the sea trial. They should know the numbers to expect and if the boat is operating normally. Also I recommend bringing 3 or 4 adults with you. You want to test it as close to how you will use the boat as possible. 2 people onboard won't perform the same way as 4 or 5 people.
Welcome to the forum @glenncal1 . Will be watching to see how your trial and survey goes. Will a 270 hit 35 knots? Yes. Should it? No. The sweet spot for cruising seemed to be at about 3400 RPM/22-24 mph. Here is a link to a thread that I posted the first year we had our 270. It has pics showing RPM as well as speed as measured by both GPS and speedometer, as well as some fuel burn info from tracking fill ups. Model year 2000 with 5.7L EFI, not the Mag model, so between 260 to 280 hp depending on which source you consult. The boat did not have the swim platform as shown above. I was able to hit 40.8 mph at between 4400-4600 RPM which is absolute redline for that block. So only did it a few times and for a short duration. That was with full fuel and water but just me on board and absolutely perfect conditions. There is an age old debate amongst 270 owners with the 5.7/350 block regarding power. I found it perfectly adequate even with up to 4 people aboard. With 5 I'd sometimes have to get someone to move forward to get on plane more easily, but reality is that I only had that many people on the boat a handful of times. Was mostly the Admiral and I, sometimes our adult daughter and with judicious use of trim tabs I was always on plane in abought 10 seconds or less. https://rinkerboats.vanillacommunities.com/discussion/comment/83651#Comment_83651
@Willhound - You must of had a heck of a following sea to hit 40 Lol.
Nope. Was a calm day, just enough riffle on the water to help the hull break free. Was sunny and cool, about 60F if I remember correctly. Had it trimmed out perfectly. But the poor thing was just screaming. Not something I'd recommend as a regular thing.
Well the sea trial was today. Boat ran good. All systems worked. Top Speed GPS 36-37 mph and we really didn't have a chance to make a nice long run and play with trim and tabs. Gonna have a mechanical inspection and if it passes buy the boat.
I did a full throttle run end of season just to see where I was for performance. I was thinking about going 4 blade next season. Anyway...I was able to hit 40mph @ around 4500. One person/20g fuel/lightly loaded. She can easily hit 35 with wife and I with normal gear during the summer running around 4200. 22P stock props - verified by GPS on chart plotter and Vessel View/phone.
I did a full throttle run end of season just to see where I was for performance. I was thinking about going 4 blade next season. Anyway...I was able to hit 40mph @ around 4500. One person/20g fuel/lightly loaded. She can easily hit 35 with wife and I with normal gear during the summer running around 4200. 22P stock props - verified by GPS on chart plotter and Vessel View/phone.
at 4200 going 35mph this tells me I am severely under propped.
Comments
On a lightly loaded day very calm water I've done 33mph max.
Typical cruise is around 3700 rpm at roughly 25mph. Max rpm is around 4600rpm for me.
This is with 2 adults and 1 child with water tank and gas filled.
If I have more people on the boat the numbers change dramatically.
I own a 270 with a mag 350 mpi and in my opinion it's way underpowered and doing it again I wouldn't have bought that package.
It's a great boat otherwise.
BTW welcome to the forum.
https://rinkerboats.vanillacommunities.com/discussion/comment/83651#Comment_83651
lol….wink, wink.
I'm ordering a set of 22p Hill Marine props tomorrow as the 20p's just make me think there is some potential there. Anyone think I should go 24p??