1979 Hydrostream Viking restore thread

[W2F a V-King]

Tunnels..re read the last part of my post ... I suggested TEST with some sand bags...didn't say to glass them in.

[tunnels]

Tunnels..re read the last part of my post ... I suggested TEST with some sand bags...didn't say to glass them in.

Confussion !!!(SOMETHING TO DO WITH AGE I GUESS ) you miss read what I said !!I never said to GLASS the sand bags in !!!!!!

[Hippie459MN]

tunnels, I think you misread and are confused. He said to put some weight in the front of the boat (sandbags) to see how it effects it. If it changes things, then he will know he might need to move the battery forward or move some things around to get more of the existing weight forward. Pretty sure he didnt mean just toss weight at the boat until it drive right. lol

[roadkill636]

Plans to take the boat out tommorrow with 2 borrowed Bravo 1 props in 24p and 26p to see what they do. Any sugestions of where to start with propshaft ? With this raised rear deck i can go from -2" up to +4"...
6" jackplate

[XstreamVking]

Thru hub props, bury them. Cav plate 2'' above bottom. See if the porpoise follows you around. jm2cts

[outasite]

The bottom of the pad is all important @80+ but it is the contour between the edge of the pad and the second strake that will have the most influence on the hull,@20/70.A
hook in the last four inches of that area will go a long way in getting the hull to lay down.A wedge of 1/2 inch at the outside rear corner of the wing will lay the hull down until it lifts clear of the water,at that point it's up to the pad to carry the hull cleanly.

[texasvector]

Ive had better results with wedges in the wings....and allison lip on pad than a "wedge" added to pad.....jmo

What kind of neg tuck do u have ?

All vkings we set up have zero bounce ...flat pad no wedge....execpt the 1 with the 3" wedge added to pad

[outasite]

Ive had better results with wedges in the wings....and allison lip on pad than a "wedge" added to pad.....jmo

What kind of neg tuck do u have ?

All vkings we set up have zero bounce ...flat pad no wedge....execpt the 1 with the 3" wedge added to pad

My boat is a little strange,before the rebuild it was the typical Viking,slight porpoise 25/55 tuck in to launch,trim out,count to three and your close,a couple taps and hang on. After the build and a fifty five pound weight gain(512) fuel and battery's moved forward its what I consider near perfect.It goes like this.Find a good stretch of water,run to and trim perfect for 90mph.Then don't touch the trim,go back to the starting line and launch! I do not trim during a run.Motor is tucked a couple degrees negative all the way through.If you go to Cutwaters 2016 romp photos,there is one of a launch and a couple at speed,all at the same setting.I don't run wedges ether,stock bottom.I beleve balance is key!

[tunnels]

My boat is a little strange,before the rebuild it was the typical Viking,slight porpoise 25/55 tuck in to launch,trim out,count to three and your close,a couple taps and hang on. After the build and a fifty five pound weight gain(512) fuel and battery's moved forward its what I consider near perfect.It goes like this.Find a good stretch of water,run to and trim perfect for 90mph.Then don't touch the trim,go back to the starting line and launch! I do not trim during a run.Motor is tucked a couple degrees negative all the way through.If you go to Cutwaters 2016 romp photos,there is one of a launch and a couple at speed,all at the same setting.I don't run wedges ether,stock bottom.I beleve balance is key!

balance always has been the key in all boats , fast or slow but guys love to load everything in the back and dig huge holes when they take off !

[texasvector]

My boat is a little strange,before the rebuild it was the typical Viking,slight porpoise 25/55 tuck in to launch,trim out,count to three and your close,a couple taps and hang on. After the build and a fifty five pound weight gain(512) fuel and battery's moved forward its what I consider near perfect.It goes like this.Find a good stretch of water,run to and trim perfect for 90mph.Then don't touch the trim,go back to the starting line and launch! I do not trim during a run.Motor is tucked a couple degrees negative all the way through.If you go to Cutwaters 2016 romp photos,there is one of a launch and a couple at speed,all at the same setting.I don't run wedges ether,stock bottom.I beleve balance is key!

we have a factory comp king....setup with tandom seats....fuel tank right behind back seat....battery up front.....1" jackplate on back .....his is same way....set trim on a WOT run and dont touch it.....zero bounce while cruising

[XstreamVking]

Mine is set up with all the weight in the back. Batt on port side, 28 gal fuel centered against the trans. Side by side seats, full bench in rear. 4'' set back. I also can set the trim level to slightly neg and run all the way to wide open. No bounce. The outside ''wings" do have the factory hook left in. Rest is dead flat, strakes are sharp, trailing edge is sharp also.

[outasite]

Dam boats are like kids,they all got a personality,and each behaves differently.Every now and then ya get a problem child!!

[W2F a V-King]

X2 ^^
Yea...I was thinking wife....but kids fit as well!

[transomstand]

Some notable "hoppers" in recent years have had very limited success with adding weight up front so I've come to the opinion it's usually not worth bothering with. To me it's too "artificial" to help in the diagnosis. Adding 50 lbs in the nose is nothing like moving 50 lbs of fixed weight, especially when that weight crosses the center of gravity.

I also think too many of us think in terms of porpoise as the hull rising and forget about the equally important action of the hull falling due do lack of lift or balance. I know of hoppers that were fixed by adding weight to the rear which balanced the hull and stopped if from falling.

One more thought. Too much negative trim at speed can also cause a boat to porpoise. You can only hold down the natural lift of the hull so much, then it will fight being held down.

Hopefully my rambling will jog something in what your seeing or feeling and lead you to try something other than "the usual suspects" when working this out.

[XstreamVking]

Transom has hit on something. When adding the weight of a 3.0 and oil tank to my King I though it would handle worse. To my surprise it actually liked to be trimmed up a little compared to the 2.5. Handled much the same, if not slightly more forgiving to trim. The pic on my screen is with the 3.0 and you can see the trim angle it likes to run at. This was 85 mph or so....Slight up trim.....