Official 1980's Weekender/Sundancer 300 thread

[Cantina_del_bay]

Hey guys, can you tell me where your a/c vents are located? If anyone can send me some pics specially if you have the 300 DA

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[trflgrl]

hey guys, can you tell me where your a/c vents are located? If anyone can send me some pics specially if you have the 300 da

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hth!

 

[trflgrl]

Hmmm....tried to search this thread for "WOT," then "RPM," to check out what others are seeing at the upper end, but neither search yielded any results.

We generally cruise at anywhere between 2000 (First Mate) and 2500 (me) just because we like the feel and handling, and typically have no deadlines. This weekend there wasn't a lot of wind, though there was a decent amount of churn from traffic....I took her up to 3200 and she handled like a dream; friend's GPS app said 22 mph, give or take. Engines took it in stride, there was no porpoising or wobbling in the bow, steering in was solid. How much more do our old girls have in them? I know prop selection and other variables influence things, so ballpark numbers are fine.

 

[dwna1a]

T, keep in mind mine are inboards with 4 blade props. WOT is supposed to be 4200/4300rpm I have never pushed her that hard. At 3400 the secondary's open up and at that point she is pushing 28mph. At 3800 she was moving right along at 32mph. Her top speed on the old 3 blades was 34mph but I don't recall the rpm or conditions.

While im sure the weight loss program has helped I'm also sure the 4 blades and clean hull didn't hurt.

i hope that helps

 

[worzy1014]

I have the same boat and it loves to be run at 3000-3200 which gives me 26-30mph. At 2000-2500 you are probably running very inefficiently and producing a hefty wake. I open my boat up every year and get 42-4400 rpm and 41-45mph.

Hmmm....tried to search this thread for "WOT," then "RPM," to check out what others are seeing at the upper end, but neither search yielded any results.

We generally cruise at anywhere between 2000 (First Mate) and 2500 (me) just because we like the feel and handling, and typically have no deadlines. This weekend there wasn't a lot of wind, though there was a decent amount of churn from traffic....I took her up to 3200 and she handled like a dream; friend's GPS app said 22 mph, give or take. Engines took it in stride, there was no porpoising or wobbling in the bow, steering in was solid. How much more do our old girls have in them? I know prop selection and other variables influence things, so ballpark numbers are fine.

View attachment 45055

 

[H2ONUT]

I used chrome powder coat on my anchor.

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[dwna1a]

I love it that idea!!

 

[H2ONUT]

I just recently learned how to powder coat at work. Now Im a coating king! LOL

Next project is the 82 50hp Evinrude for the 13 Whaler!

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[H2ONUT]

Here is the Whaler all stripped down.

And the motor.

Boat and trailer were $250, the motor was $100. Lots of work ahead of me. Since Ill never have a 67 GTO, this will have to do!

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[Pure84GTT]

I cruise at 2800 and on my GPS I run 22-22.5 mph
3000 = 24
3200 = 26
3400 = 29
3600 = 31
3800 = 34
4000 = 36
4200 = 39

I have hit a best of 41.2 3 years ago but have not achieved it since.

 

[trflgrl]

Thanks for the feedback, all. This is the season of tuning up our driving habits; using the trim tabs better will be one major improvement.


Is there a general guideline of any kind that inboards have higher speed at similar RPMs as the I/O, or vice versa? Since I'm not messing with props/not making major physical changes to the boat's components or layout, I don't assume I'll match anyone else's numbers exactly, but I'm sure it will help us to have ranges in mind.



That powder coat job is awesome, H20NUT!!

 

[dwna1a]

I just recently learned how to powder coat at work. Now Im a coating king! LOL

Next project is the 82 50hp Evinrude for the 13 Whaler!

Sent from my SAMSUNG-SM-G935A using Tapatalk

teach me! Or I'm shipping you my anchor

 

[worzy1014]

I would only compare numbers with other sterndrive boats, disregard inboard numbers as they will be different. Numbers will be slightly different from boat to boat even if both boats are sterndrive due to different weights. I am trying new 4 blade props on my alpha ones this weekend. I will let you know if they work out for me.

Thanks for the feedback, all. This is the season of tuning up our driving habits; using the trim tabs better will be one major improvement.


Is there a general guideline of any kind that inboards have higher speed at similar RPMs as the I/O, or vice versa? Since I'm not messing with props/not making major physical changes to the boat's components or layout, I don't assume I'll match anyone else's numbers exactly, but I'm sure it will help us to have ranges in mind.



That powder coat job is awesome, H20NUT!!

 

[H2ONUT]

teach me! Or I'm shipping you my anchor

LOL, We need to practice a little more with them.

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[SCORPIO]

I would only compare numbers with other sterndrive boats, disregard inboard numbers as they will be different. Numbers will be slightly different from boat to boat even if both boats are sterndrive due to different weights. I am trying new 4 blade props on my alpha ones this weekend. I will let you know if they work out for me.

I want to do exactly the same thing on my 89 300DA so please post your results and the specs on what props you try. I don't have a 'loaner' shop near me so I want to be sure I know where to start before spending bucks.

 

[JVM225]

Re: Props. I put a set of stainless 15 1/5 X 17 pitch props on my 87 300 Sundancer with C/R alpha 1's a few years back, and it gave me vastly improved performance out of the hole, and at cruising speed. Made it feel like a different boat.

 

[JVM225]

Hmmm....tried to search this thread for "WOT," then "RPM," to check out what others are seeing at the upper end, but neither search yielded any results.

We generally cruise at anywhere between 2000 (First Mate) and 2500 (me) just because we like the feel and handling, and typically have no deadlines. This weekend there wasn't a lot of wind, though there was a decent amount of churn from traffic....I took her up to 3200 and she handled like a dream; friend's GPS app said 22 mph, give or take. Engines took it in stride, there was no porpoising or wobbling in the bow, steering in was solid. How much more do our old girls have in them? I know prop selection and other variables influence things, so ballpark numbers are fine.

View attachment 45055

I generally motored around at 3 different speeds with mine. I had 15 1/2 X 17 3 blade stainless props.
1. Idle speed for 5 MPH "No Wake" zones.
2. Hull speed which was about 1200 RPMs. Not plowing water at that speed, and going 7-8 MPH.
3. Planing speed which was 3100-3200 RPM and anywhere from 27-sometimes 30 MPH if conditions were good.
Anything higher than 1200, and lower than "on plane" resulted in plowing a lot of water and wasting a lot of fuel.
I had a Garmin NMEA 2000 network on the boat with GFS 10 fuel flow senders tied in so I could see my fuel burn in real time up on the GPS screen.

 

[JVM225]

Hey guys, can you tell me where your a/c vents are located? If anyone can send me some pics specially if you have the 300 DA

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My 87 300 Sundancer only had two vents. One was over the closet shelf on the port side in the main cabin, and the other was on the port side up in the forward berth. They were in the exact same location as other 80's 300 Sundancers,
I've see 1988's, and 1989's that had a third vent in the aft berth.

 

[SCORPIO]

My AC vents are in the same place as trflgrl, and I have three counting the one in the aft cabin.

 

[TitanTn]

Is there a general guideline of any kind that inboards have higher speed at similar RPMs as the I/O, or vice versa? Since I'm not messing with props/not making major physical changes to the boat's components or layout, I don't assume I'll match anyone else's numbers exactly, but I'm sure it will help us to have ranges in mind.

Yes, generally I/O will be faster. So much depends on weight and prop selection, but generally speaking, the trim ability and less drag of I/Os will generate more speed. So be sure to compare to someone with a similar setup.