[Old Bald Guy]

What about a hydrostatic drive to get around the narrow rpm range thing?

 

[iltfah]

I don't know chit about airboats or anything but I have worked for Benz for 9.5 years. I don't care what ANYONE says those mb diesels are junk...if you think you can mod one of those and it still last your crazy no matter what "car and driver" says.... And if you think you can buy the motor, and use it cheaper than a cummins/duramax/whatever else your are smoking some serious crack and a half!!!

 

[DeadCenter]

something is wrong with those tq numbers.

And yea a 1k HP plus motor will be MUCH harder to keep cool and need HUGE turbos making for slow spool. A 6-700hp motor would be much more realistic

1 turbo was smaller and the other was larger,so the motor didnt have as much lag.now when we upgrated to the same size as the other one, the torc was much greater,but the lag was worse.i no what the motor made on horsepower an torc because i saw it on the dyno and had the same question,but being 1 turbo was greater than the other that was the answer to the reason why the torc was less than the horsepower.after pissing away 30,000 i can tell you guys right now,i see why they can only put 300 horse desiel's on a airboat.it all is set in stone,EGT'S get way to hot with big horsepower and the turbo lag really sucks.

 

[Gbollom]

1 turbo was smaller and the other was larger,so the motor didnt have as much lag.now when we upgrated to the same size as the other one, the torc was much greater,but the lag was worse.i no what the motor made on horsepower an torc because i saw it on the dyno and had the same question,but being 1 turbo was greater than the other that was the answer to the reason why the torc was less than the horsepower.after pissing away 30,000 i can tell you guys right now,i see why they can only put 300 horse desiel's on a airboat.it all is set in stone,EGT'S get way to hot with big horsepower and the turbo lag really sucks.

one big and one small turbo (compounds) is how to greatly reduce lag. I think you just went to big on the motor build. You could easily have a 600hp 12v that could push enough air with compounds to pretty much never get hot.

You could always add an EGT triggered water methanol kit and knock egt's down another 100-200 for REALLY long runs

 

[Michelob]

If you wanted to build a GOOD setup, take a 12v cummins(or 24v), build it like ya want, bigger turbo(or twins) injectors, upgraded fuel system, then through LPG into the mix. you could have like a 10gallon diesel tank, and like a 8gal propane tank, and have a GREAT amount of running time, loads of power, and no black smoke. big ole heavy diesel truck can get better than 25mpg on the highway, a lightweight airboat should get alot more. but you would probably have to weigh down the front of the boat SOMEHOW...cuz these diesels aint no SBC...

A transmission helps with mpg lol

 

[D-Rock]

A 4bt cummins would be small and be decent in the weight category and with few mods be making good hp and torque numbers and still be real fuel efficient. Idk how good it would work for an airboat though

 

[sticknmofish]

A transmission helps with mpg lol

Very true, plus the drag of the boat will be alot greater than trying to turn the tires. Just try driving a airboat down the highway and you will see the difference in drag of a boat vs truck.

 

[wideload]

Now ive been thinking about the rpm thing and the easiest way way to do it would be if they made a reduction gear box that had a high and a low the low would be 1:1.68 and high would beg 1:2.68 and then just have a incoder motor that switched it if some one could just develop it would be awsome

 

[Gbollom]

Now ive been thinking about the rpm thing and the easiest way way to do it would be if they made a reduction gear box that had a high and a low the low would be 1:1.68 and high would beg 1:2.68 and then just have a incoder motor that switched it if some one could just develop it would be awsome

I have previously asked century if they had any interest in making a dual speed reduction and had been told no. Would be sweet if someone talked them into producing or someone else to make one. They could be beneficial for all boats, a cruising speed would greatly improve fuel economy

 

[wideload]

Some one would make a killing because just having a high and low would make every boat need one because even gas boats can run 4000rpm vs 5600 or whatever other boats would run at wide open

 

[TRAVIS G]

here is a cool you tube vid:

that boat sits 15min from my house> It is a beast but should be for a total of $117k.

 

[Guest]

that boat sits 15min from my house> It is a beast but should be for a total of $117k.

Yea, thats a reasonable price... LOL

 

[Gbollom]

Yea, thats a reasonable price... LOL

i was gonna ask if that was a serious price tag

 

[TXBA]

dont you have some crappy welds to do?

thats so messed up

 

[TRAVIS G]

i was gonna ask if that was a serious price tag

yes it is. he has more dollars than sense. its a nice ride....for what it is i guess.

 

[maglite]

Guys, for you who think emissions arent a problem.......think again! I work on natural gas engines and compressors in the oil field and we have unreal emission issues. They are up our azz like crazy and we are burning natural gas! Trust me the EPA is watching It all! Even a few hundred airboats
with diesels will be watched. The emissions all stem from california. Why do you think we have urea on diesels.now? Why do California diesels shut off atter 10 minutes of.ideling? Emissions! Its serious to those right wing tree huggin esco**** and they have money!!! Sothink what you want but its getting worse daily with restrictions!

 

[clark3]

But I can blow black smoke and that makes me cool right?

 

[Bobby G]

rollin coal is cool.especially when there is a convertable behind you:hb:

 

[WBG444]

I’m gona think out loud…airboat motors are under a load their entire life…those props are kinda like a loaded trailer on the back of a truck…them fancy computer chips you plug into ur trucks that give you instant 120HP have settings, “the ones I have seen have settings” example (level 1 towing) (level 2 economy) (level 3 Full Power) …the reason being is if you hooked onto a trailer and pulled it all day up and hills and such it would burn it up right? EGT would get to high…
Question…why don’t big rig 18 wheelers run the same motors as the dodge ford and Chevy diesels that have 600HP and get 22 MPG like u guys say… (I pulled them numbers out my ass) I think it’s because them motors cant do it all day every day …that’s why big rigs have 300-650Hp…they pull their entire life, just like being under a load like an airboat motor… and I know there is a huge difference between a truck and an 18 wheeler motor but…do you see what I’m thinking out loud?

 

[Team Bleed Em Out]

I’m gona think out loud…airboat motors are under a load their entire life…those props are kinda like a loaded trailer on the back of a truck…them fancy computer chips you plug into ur trucks that give you instant 120HP have settings, “the ones I have seen have settings” example (level 1 towing) (level 2 economy) (level 3 Full Power) …the reason being is if you hooked onto a trailer and pulled it all day up and hills and such it would burn it up right? EGT would get to high…
Question…why don’t big rig 18 wheelers run the same motors as the dodge ford and Chevy diesels that have 600HP and get 22 MPG like u guys say… (I pulled them numbers out my ass) I think it’s because them motors cant do it all day every day …that’s why big rigs have 300-650Hp…they pull their entire life, just like being under a load like an airboat motor… and I know there is a huge difference between a truck and an 18 wheeler motor but…do you see what I’m thinking out loud?

Big trucks pull big loads Brady.... I pull in upwards of 45000 pounds everyday.