Tige 2-1 Transmission Test

[UNSTUCK]

Well I was cruising around Powell a couple weeks ago at a blistering 24 MPH @ 5000 rpm's. No ballast, but 10ish people. I have no reason to go 40 in a tow boat. 30 would be great though. Sounds like the 400 would be just fine. Maybe I missed it, but which tune did you go with? 400 or 440?


Yes, the engines are the same. The tune is different between the 360, 400, and 440.

[CarFanatic]

not sure 40ftlbs is worth 6k......

[Bakes5]

So 40 in a towboat. The reason for 40 in a towboat is so you can cruise effortlessly at 30. 5000 RPM and 24 MPH? No thanks. I love being able to cruise at 28-30 mph at ~ 3500 RPM. I also like 4.3 GPH

No free lunches with a single speed system. You can be a tractor, a sports car or a compromise/mix of both. I will believe a boat that can surf easily at 11,000 pounds and then hit 40 mph WOT empty when I see it. And let's face it, if the boat has a lot left at 11,000 lbs we all know that someone will just bump it to 12 or 13,000 pounds to get the super wave.

Caveat here is the supercharged motors. I think they might have the capability to do both.

[Germaine Marine]

So 40 in a towboat. The reason for 40 in a towboat is so you can cruise effortlessly at 30. 5000 RPM and 24 MPH? No thanks. I love being able to cruise at 28-30 mph at ~ 3500 RPM. I also like 4.3 GPH

No free lunches with a single speed system. You can be a tractor, a sports car or a compromise/mix of both. I will believe a boat that can surf easily at 11,000 pounds and then hit 40 mph WOT empty when I see it. And let's face it, if the boat has a lot left at 11,000 lbs we all know that someone will just bump it to 12 or 13,000 pounds to get the super wave.

Caveat here is the supercharged motors. I think they might have the capability to do both.

Bakes. Im telling you its already happened. Lol. Nautique has been doing it for a few years now.

What does bumping the weight have anything to do with it? You mean Tige making the boat 1k-2k lbs heavier? I doubt it. If you mean people making it heavier sure. I will be one of them. With the ability to run PnP in the new Rzx and cut down on the lead. Over the course of last weekend, we had the 2 with 600lbs of lead no pnp at 5k with the 440. That means the overall weight was somewhere in the vicinity of 11k lbs. We ran the 17/14 at 5k feet with a whole boat full of people and it surfed at 3500 rpm. It also cruised with that same lead in the boat at 35MPH. It had an excess amount of prop on the bottom, with plenty of room to tweak the pitch for some more top. That boat will be a 11k lb barge that can surf low in the RPM range, tow a tank out of the bottom and still run close if not into the 40s on top. Thats what the 2-1 trans along with the big clearance does for you. This is reality not some fairy tale.

[Germaine Marine]

not sure 40ftlbs is worth 6k......

And 50HP or so on top-

[CarFanatic]

thats a little better I suppose. I thought I read the 440 is more top end power though.

[Germaine Marine]

Well I was cruising around Powell a couple weeks ago at a blistering 24 MPH @ 5000 rpm's. No ballast, but 10ish people. I have no reason to go 40 in a tow boat. 30 would be great though. Sounds like the 400 would be just fine. Maybe I missed it, but which tune did you go with? 400 or 440?


Yes, the engines are the same. The tune is different between the 360, 400, and 440.

I got the 400 for sake of being the guinea pig. Its a win win for me. Boat has plenty of power even at elevaton. It was eye opening to everyone involved. Someone from Tige reached out to me a few days later because it was such a shock and wanted some info. The 2-1 and the big clearance which results in being able to run a big monster prop is changing the way the whole game is played.

[Germaine Marine]

thats a little better I suppose. I thought I read the 440 is more top end power though.

It is... It starts to separate around 4k RPM's from the 400.

[CarFanatic]

so at surf speeds you wouldn't notice a difference really. Sounds like the 400 for me would be fine as well.

[Germaine Marine]

At surf speed I couldnt tell a difference. I am sure the curve on the Dyno would show some but off the seat test I couldnt tell.

[ironpeddler]

Piggy backing off what Adam said....
The 16.5/16.75 prop is just pitched way wrong. I dont know how they settled on that or who did the testing but its *** backwards. While the 16/13 is a stronger option because its pitched so drastically different, I see no reason to go down in diameter from the factory number. For example a 16.5X13 would be a better option at altitude if the 17 didnt fit, but it does. As long as no one gets prop burn which we would have found out last weekend then I see no benefit to going smaller diameter wise. Pitch it correctly for the altitude and cup it correctly to offset when the help on top comes and you should have a prop that outperforms anything in the smaller diameter realm.

A sea level 400 with the 2:1 with a 17/15 should be amazing. You are talking about a setup that will have enough to push the Rzx around with PNP and Lead, surf at 3400RPM and still do 38MPH on top if not more.

Im basing this off of the 400, 2:1 at 5K feet being able to push the boat full of ballast with ease into the mid 20s, surf at 3500-3600RPm and still squeak out 34MPH

No lead or PNP, a change in pitch and I think you are surfing in the 3200 RPM range, wakeboarding fine and hauling butt around the lake over 40......

Ill be running 3 different props this summer to give everyone an idea, should be killer!

So the stock prop that comes on the 2018 RZX models isn't pitched right and should be changed from the 16.5/16.75 to a 17" prop if you are at or close to sea level? How easy is it to change the pitch of your prop?

[CarFanatic]

what prop where you running elevated?

[Germaine Marine]

I ran a 17/14 .105. At 5-6k feet it was the right prop for the 400/440.

At sea level or close to it it's going to be too much. I would say a 17/15 at sea level should be good to go with a tweak in the cup to open up some more top without losing hole shot.


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[CarFanatic]

whats stock prop on that motor on a rzx2?

[UNSTUCK]

I think I have posted these before. Can't remember. It really is hard to justify the 440. At your surf speed of 3400 RPM's they are only 5-10 ft/lbs off. I wonder how high your RPM's get to during the pull and getting on plane

Rapter Engines Dyno Chart.jpg


And just for fun:
indmar 575 engine curves.jpg