Tell me how you big single screw guys get on plane using your trim tabs

aero3113

skennelly said:

I'm about the same as @Lake_Bum tabs down trim down and raise gradually once on plane to the sweet spot

Same here

YYZRC

I go tabs full down trim full down and once on plane tabs all the way up and trim up until it porpoises a bit, then trim down until porpoising stops. 

I only use one tab (the starboard tab as the boat runs port high) to level the boat while it is on plane. Am I using my tabs wrong?!

PickleRick

On my 235 i use the tabs down to track straight at idle speeds.

I also use them to level a port side list at running speeds.

I don't use them at all to get on plane. She pops up in just a second or two.

I also have a large fin on my alpha

rasbury

Pretty much the same...down at slow speed helps tracking...everything down to start. I end up with tabs in the water however...probably could raise them and less od trim would do the same but use to level as well. If I have say large passengers sitting in the back, full of water and fuel I have them move forward but I think I'm ready for a tune up also....takes about 8 seconds to get on plane...not to bad all things considered and lumbers along nice at 25 which is max speed on the river.

Willhound

YYZRC said:

I go tabs full down trim full down and once on plane tabs all the way up and trim up until it porpoises a bit, then trim down until porpoising stops. 

I only use one tab (the starboard tab as the boat runs port high) to level the boat while it is on plane. Am I using my tabs wrong?!

Nope. Sounds about perfect.

YYZRC

PickleRick said:

On my 235 i use the tabs down to track straight at idle speeds.

I also use them to level a port side list at running speeds.

I don't use them at all to get on plane. She pops up in just a second or two.

I also have a large fin on my alpha

I didn't need tabs to plane on my previous boat.  I don't think the 330 would plane without them!

aero3113

With the 4x4 props I don’t think I need tabs but I use them. I’m up and out in under 5 seconds.

PickleRick

The bravo 3 does have a ton of lift. 

I think they make a bravo 3x now for diesels.  That would be a nice upgrade if i had near 10 boat dollars to spend

Handymans342

Yanmar makes a superior drive

Handymans342

@PickleRick. Have you changed fuel filters yet??? Have you verified boost yet?? You should get the fuel polished very soon. Also add a bottle of cetane boost additive 

Spyderweb

I don't think the 330 would plane without them!

YYZRC said.
  I don't think the 330 would plane without them!

I agree.  I can’t imagine trying to get the 330 up without full tabs.  And that’s just with my wife and I.

PickleRick

Handymans342 said:

@PickleRick. Have you changed fuel filters yet??? Have you verified boost yet?? You should get the fuel polished very soon. Also add a bottle of cetane boost additive 

Fuel filters look new but will be changed out soon. Any fuel delivery issue with a diesel results in black smoke.  I have zero smoke. I habe 3/4 tank of fuel. I am putting in a bottle of cleaner, booster and stabilizer for my next launch and will do a another when i run this tank down to about a 1/4 tank.  

I have a boost gauge ordered.  Im not sure what part of the intake manifold is able to be drilled and and tapped for pressue so im going to the waste gate feed tube.  Instead of a rubber hose like on a street vehicle it uses a metal tube with banjo bolts from the intake(intake is also the air to water intercooler aka after cooler).  I dont want to risk tapping the intake to find a water jacket.  

I've ordered a new tube that goes from the intake to the waste gate. I will be having that tube modified to make a T for my boost gauge.

Ive inspected the intake fins and they look perfect. The turbo spins freely.  There are no signs of a boost leak(oil residue)  

There is the possibility of a sticking wastegate, once i know what the factory boost setting is for this motor i will be able to compare that to the results on my gauge.  

PickleRick

I got a parts break down. No gasket between the waste gate and housing, ill pull the waste gate and pressure test the diaphram as well as check for sticking actuator.

The admirals mom has a b day party Saturday so no lake time sadly

Handymans342

What lake are you on?

PickleRick

I go to Hartwell.  

MarkB

You're going to need the trim tabs down to have a decent experience planing, and yeah 175 lbs of concrete at the back of the boat isn't helping at all.

PickleRick

@MarkB i expected that in kgs from you 😝

Ill be calling hill props but only after i verify my engine is in top order.  


Im no prop expert.  18 knots is where this jumps up on plane.  I dont want to go too aggressive and slip so much i cant get over the hump and i cant stay over propped or ill kill the engine running wot

J3ff

That's about where the line is for me too, which makes sense, maybe a little less with the better props. 

PickleRick

Ive been seeing used bravo 3x on ebay for sub 3k

J3ff

Does a bravo 3 really have a good rep? MINE sure doesn't!!!  I'd say try a prop upgrade and go w/ it. 

PickleRick

The x model is at least diesel compatible.   I trailer on fresh water so corrosion won't be an issue.   


I will be trying a prop first

Ian

Spyderweb said:

I don't think the 330 would plane without them!

YYZRC said.
  I don't think the 330 would plane without them!

I agree.  I can’t imagine trying to get the 330 up without full tabs.  And that’s just with my wife and I.

I never use them to get on plane in my 310. Then again I don’t want to shoot out in 5 seconds either, I take her up easy and at around 16mph the bow starts to drop as she gets on plane. I’m not pushing water for that long to get there.

Handymans342

@PickleRick. Do a prop slip test

aero3113

@icoultha , just make sure your not putting unnecessary strain on the engines. You don’t want to use them to push through and eventually get up. Try using the tabs, they will get you up and out quickly and save on fuel.

PickleRick

i still cant find a stamped serial and the tag is gone with drive ratio

Handymans342

The serial number on a bravo is up near the top close to the hull starboard side. @Dream_Inn should be able to get a pic of his

Handymans342

What is the max rpm of that motor??

PickleRick

3600

PickleRick

I think id either have a 1.8, 2.0 or 2.2, 2.0 is the only one i remember 100%. 

Doing 2.0 which is common on diesels.  3000 rpms at 22 knots(25 mph) it says i have a prop slip of 1.  I dont think that's right lol

Handymans342

My drive was 1.67