1984 28 w/360 WOT?
- shade2u2
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1984 28 w/360 WOT?
What should WOT be for my boat?
I'm seeing about 4100 rpm & 25mph. Bottom may not be crystal clean.
I'm seeing about 4100 rpm & 25mph. Bottom may not be crystal clean.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
Re: 1984 28 w/360 WOT?
25mph at 4100 by GPS?
Dude, I'm envious. What is your prop?
Dude, I'm envious. What is your prop?
2x 1973 28 Express - Single 318
New electrical panels, water system and velvet drive
Miami FL & Catawba OH
New electrical panels, water system and velvet drive
Miami FL & Catawba OH
- shade2u2
- Royal Aluminum Star
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- Joined: Mon Jul 21, 2014 3:11 pm
- Location: Marietta, Ohio -mile marker 172
Re: 1984 28 w/360 WOT?
Yes by GPS. Actually touched 26 once in a while but might be up to 1mph current.
Looks like prop is 16x14 - at least spare is.
Looks like prop is 16x14 - at least spare is.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
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Re: 1984 28 w/360 WOT?
WOT is 4000 at 33-34 mph. But I have trin 360s on a 28 fisherman
1986 28 fisherman
twin chryser 360's
Marblehead, Ohio
twin chryser 360's
Marblehead, Ohio
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Re: 1984 28 w/360 WOT?
That's also on a calm day
1986 28 fisherman
twin chryser 360's
Marblehead, Ohio
twin chryser 360's
Marblehead, Ohio
Re: 1984 28 w/360 WOT?
Sounds like it's under propped.
Does it get right up on plane, and at part throttle? If so, an inch or more pitch would deliver more speed and better MPG. If not, you'll have to live with it.
Jeff
PS: My old 32 sedan with 16 x 14 (3 blade props, 1.52:1 reduction) would plane off on one engine and maintain about 15 mph at 3,200 rpms (as I recall). That was with 360s. Hope that helps.
Does it get right up on plane, and at part throttle? If so, an inch or more pitch would deliver more speed and better MPG. If not, you'll have to live with it.
Jeff
PS: My old 32 sedan with 16 x 14 (3 blade props, 1.52:1 reduction) would plane off on one engine and maintain about 15 mph at 3,200 rpms (as I recall). That was with 360s. Hope that helps.
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
- shade2u2
- Royal Aluminum Star
- Posts: 290
- Joined: Mon Jul 21, 2014 3:11 pm
- Location: Marietta, Ohio -mile marker 172
Re: 1984 28 w/360 WOT?
I'm trying to become more familiar with the boat. I'm not used to inboards let alone this unique wide aluminum hull. I guess I don't know if it gets on plane quick or not.
I'm trying get an idea how good or bad the engine is running. Speed is not critical for me but efficiency would be. Is there an spec'd WOT rpm for this boat?
In the past with my Bayliner cruisers it was easy to find the recommended prop spec for the given model, engine & outdrive.
I'm trying get an idea how good or bad the engine is running. Speed is not critical for me but efficiency would be. Is there an spec'd WOT rpm for this boat?
In the past with my Bayliner cruisers it was easy to find the recommended prop spec for the given model, engine & outdrive.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
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Re: 1984 28 w/360 WOT?
WOT is just fine Most our M's never get near it.
You may want to step up your pitch a couple. Sounds like your are running 9 pitch. 11 will give you approx. 250 less RPMs at WOT but will be more fuel efficient at slower speeds.
safe boating,
dave
You may want to step up your pitch a couple. Sounds like your are running 9 pitch. 11 will give you approx. 250 less RPMs at WOT but will be more fuel efficient at slower speeds.
safe boating,
dave
1987 Marinette 29 FB Sedan
Retired Boat Accident UL and USCG trained investigator
Retired USCG Captain
Retired Boat Accident UL and USCG trained investigator
Retired USCG Captain
Re: 1984 28 w/360 WOT?
Max rpm does not need to exceed 4,500.
A good cruising rpm for singles is about 3,200; for twins 2,500 was best on my 32 footer (for gas mileage).
Jeff
A good cruising rpm for singles is about 3,200; for twins 2,500 was best on my 32 footer (for gas mileage).
Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
- shade2u2
- Royal Aluminum Star
- Posts: 290
- Joined: Mon Jul 21, 2014 3:11 pm
- Location: Marietta, Ohio -mile marker 172
Re: 1984 28 w/360 WOT?
Thank you all for the help.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)
1986 39 Sedan w/Crusader 454 & 1.92 drive.
former - '84 28 Express Hardtop w/single 360 1.5:1 drive (SOLD - now in Uruguay)
Ohio and Muskingum Rivers (Marietta, OH)