Droptop's 1985 Convincor Twin Outboard Restore Thread

[knarloid]

Got to say hi to you and your wife first, doing a heckuva job.

He's spending it as quick as she can earn it!!!

 

[demag67]

You did a fantastic job!!! How did the seacast pour go? I've seen offshore guys use that with great success. I think Spencer is going to do a carbon pour on his boat. http://www.carbon-core.com/carbonbond-transom.htm

It was my first time pouring it but i did not feel it is as strong as the nida bond. Chris did go with a carbon fiber mix which was in testing. The original stuff maybe stronger though.

 

[JUPITER PULSARE]

The porpoising is a setup issue. With a narrow hull, the weight of twin outboards hanging off of jackplates, etc. you need to find stern lifting props to help alleviate the bounce..They will stop bouncing once you get the boat up to a decent speed and it rides up on the keel the nose will settle down. More seat time and playing with the trim..

 

[MateFever]

Great job chris, too bad you had to deal with this but hopefully you can spend time enjoying the boat.

 

[DropTop5.0]

The porpoising is a setup issue. With a narrow hull, the weight of twin outboards hanging off of jackplates, etc. you need to find stern lifting props to help alleviate the bounce..They will stop bouncing once you get the boat up to a decent speed and it rides up on the keel the nose will settle down. More seat time and playing with the trim..

There's a little rocker in the hull that still needs to be addressed; that is probably giving me a few problems. It does fly pretty straight when only the last four feet are in water. It actually rides pretty good with K-planes down one click.

 

[saxmanbrad]

man, you guys did a great job! I know whose brain I'm going to be picking when I replace the transom in my Enchanter!

 

[ChuckB]

You guys freakin amaze me. When I saw you testing on the Delaware on Sunday I couldn't believe how fast and smooth it was running.

brief video of the test ride:

https://www.youtube.com/watch?v=R3xx_kNL5C4

 

[sonicss31]

JP-Post #23 is spot on. Also remember these bigger boats take a little more time to get "settled down" than the single OB boats. Video looks like you are on the right path. If I cannot make it to the Chesapeake Bash I will send a pair of props with Candace for you to try which may help your dial in testing.

 

[JUPITER PULSARE]

You guys freakin amaze me. When I saw you testing on the Delaware on Sunday I couldn't believe how fast and smooth it was running.

brief video of the test ride:

https://www.youtube.com/watch?v=R3xx_kNL5C4

After watching this video I think your propshafts are too deep in the water. Your running with the bow relatively high once you're trimmed out and the bounce stops which means the prop is so deep that it's leveraging the bow up attitude.

 

[sonicss31]

Also, don't have a mindset that chopper props are the best for this hull. Years ago I got rid of the choppers on my Sonic w/3 2.4's and tried Mirage +'s and boat was better all around.

 

[JUPITER PULSARE]

There's a little rocker in the hull that still needs to be addressed; that is probably giving me a few problems. It does fly pretty straight when only the last four feet are in water. It actually rides pretty good with K-planes down one click.

Try and get a sideview picture while running at speed; about 55mph. The attitude of the boat should be reasonably level with a hint of bow height and low rooster tail:

 

[RGPIII]

Awesome job guys! cant wait to see it in person in june.