Drive Hight
 

Hey guys, I am trying to get some info on drive hight. I have a tantrum and I just redid the transum. So I have a clean slate if I want to raise my drive. I talk to different people and of course get different answers from everybody. The new engine came of the dyno tuesday. If anyone knows of somebody that has played around with x dimentions on this boat, I could use some help. Thanks Jon

Wanna buy an extensionbox:party-smiley-004:
I might be doing the same thing this winter.

There is no answer to your question as I told you.

Gonna be based on HP, drive type and if you want to break into the wallet for a prop.

What did Imco say?

Thanks for the response. The Engine came off the dyno at 927 hp at 5800. 830 ft lbs of tourque at 5000. Im using a b max upper with a std bravo lower. It is a std 22 inch. And as far as the prop goes, I have to buy a new one any way!

If it is standard as in smaller diameter prop shaft you better by two props.....

LOL...true.

I have the large prop shaft. The thing is before I cut the back of the boat, should I raise the motor.

How deep are you now? I'm @ 4.5" below & the boat planes fine but blows out turning sharply. Not the same boat i understand but I would raise the engine for sure. You can always play with spacers later to find the sweet spot.

Cut it at 20" Space from there. At 20" with the right 5 blade you are ok. Biggest problem is if your right arm is not connected to your brain combined with seas and horsepower you will never enjoy a good day on the water.

I would detune if you are not on a flat lake or river, drop it 2" and use a four blade with a different gear ratio.

If you think going 100 mph in a 25 foot boat is a good idea, I have to question why.

ok, sound good. Now for the million dollar question, what is the correct way of measuring. I have heard like 3 different ways. I guess the boat builder would know best! Thanks

WOW... thats a lot of HP, blown I assume? :worthless_without_p motor. transom. bilge.

A quote I pulled from one of my old threads(Gordo)
"APBA measured ours at the transom from the centerline(crankshaft/pivot pin centerline) down to the lowest point of the keel. The max allowed by rules was 19.5" which is where mine should be"

unless I'm doing something wrong, I only have 16 in. If I measure from crank to keel, down the back of the boat.

I love how you read a whole thread and it ends abruptly! :throw

yeah but a year went by and most forgot about it. Then all of the sudden, BAM, there is a 100mph Tantrum at JOTJ.

:eekdrop: I think a Congratulations in in order. Nice job fatherb.

My Addiction, hows about a couple of tantrums at Rock The Bay on august 17 and 18th

I'm probably not going to make that run but I might be at Red Eye's for lunch that day:party-smiley-004:. I have been tryig to set up a day on the Bay and that looks like the date I might end up with. We will be going out of Shadyside, south of the bridge.

Nick

Sounds good, keep in touch with me and we will meet up. This time on the water