Titan 29 Upgrade Questions..

[Piranha22]

Hello Everyone!

Back in August I purchased a "RTR" Titan 29 from Fine Design.. I think I have finally fixed all initial issues with it and now I am ready to make it faster. I currently am running a Nemisis 9XL with FD Turbo Trans, Hydra 120, 2x Lipo 2s 3700 25C,a x445 Octura prop, and OSE Turn Fins (basically stock RTR gear).

I'm a newbie to FE (Not to RC) but I am eager to learn more.. I was thinking about upgrading the motor and batteries. Does anyone have any suggestions? I have heard a lot of good things about Neu and Lehner motors. I want this boat to go super fast on flat water!

Thanks for your time!


Pete

[FE_Chris]

I would think if you wanted more speed, go with a neu or lehner motor. You could also gear the 9xl up a little, that might get more speed.....

[Steven Vaccaro]

first what is the rating of your lipo cells?

What kind of amps are you pulling with the current setup? One way to tell is to fully charge your setup.Than run the boat full speed for an exact minute. Than recharge the lipos to see what goes back in. Once you know the numbers, plug them in on here http://www.offshoreelectrics.com/conversion.htm
Let us know where you are. You may be able to change gearing.

[kck741]

I read a review in a magazine on the Fine design RTR Titan hull IT runs 45Mph stock with an octura 442 prop how fast do you want to go 45 is moving fast.There is a limit to how fast you can make a hull go.The titan hull is a good hull for chopped water.

[Piranha22]

Thank you FE Chris, Steve, and kck741 for your input..

I would like more acceleration and a little bit more top speed.

Steve, I am not sure about the current AMPS that I am pulling with my current setup. I will give your suggestion a try to see if I can figure it out.

Would a 442 prop give more speed than a 445? I guess I also need some schooling in the prop department..

I did notice that the batteries and speed control run only mildly warm while the motor seems to be running pretty hot.. That made me think that upgrading the motor to a Neu 1515Y might be a good idea.. That way everything is upwards compatible from there..

Am I way off in my thinking here?


Thanks,

Pete

[Piranha22]

Steve,

I forgot to mention I am running two 2s 3700 25C 7.4 volt Lipos in my current setup.

Thanks,

Pete

[properchopper]

re :

Pete,

I have a similar setup ; Titan 29, 9XL [except mine's direct drive], Hydra 240, 4S 4100 X 2. I propped down from an X445 to an X442 and like it better; plenty of top speed and acceleration. Because the hull is rather wide, it corners at WOT but catches air at @ 50 mph. Go to YouTube, search " Tony's P-Mono". Faaast run + blowover. Friend's Titan 40 [33"] will get airborne @ 52 mph. This is preventable but may cause hull to run too wet.
What gear reduction are you running ? You might try 1 : 1 with an X 440/3 and get the results you're looking for.
Also, the 9XL is a really good choice for your boat ; the 1515 Y may be faster, but remember : more top speed = more aerobics ! I'm rigging a Delta Force 33" with a 1515Y, but the boat should be more stable in mid-fifties racewater.

[Piranha22]

Thanks Properchopper.. I'm not sure what the gear reduction is. I will try to figure that out..

Could I just drop a 1515Y in the boat the way that it is without changing anything (gearing, prop, batteries)? Or is it impossible to say without knowing what gear reduction that I have now?

Thanks,

Pete

[properchopper]

To get the gear ratio : Count the teeth on the motor gear, count the teeth on the driveshaft gear ; the motor gear will most likely have less teeth. Divide the motor gear teeth # into the shaft gear # ; that should give the reduction ratio.
If you drop in the 1515Y you'll go faster for sure, but I'll tell 'ya, the 9xl at 1 : 1 should just about max out the setup. Cheaper to buy a gear or two than a new motor.I love my 9XL in the Titan & won't change it out ; but of course the Neu will rock, maybe too much !

[Piranha22]

Thanks Propperchopper.. I must admit I am green when it comes to FE boats..

Pete

[Steven Vaccaro]

Prop cleared up what I was trying to get at on rrr. Some people just want you to dish out money to make a hull faster. I'm more into making what I have run its best before jumping into a $300 motor!

[Piranha22]

Thanks Steve, what you and Prop are saying makes sense.. I did find out that my gear reduction is 151:1 (68/45).. I am going to try moving down to 133:1 to see how that goes before I spend more big bucks..

I will also make it a point to monitor my run times and the temp of the motor, speed control, and batteries..


Pete

[Steven Vaccaro]

If the motor is hot now it will be hotter with that gear change. More rpm doesn't always mean a faster boat. For instance going to a smaller prop in some cases makes the boat faster not slower, like you would think. I would change the cooling tubes to a cooling jacket. The more will run cooler that way.

Also I don't think you mentioned which prop you are currently running?

[Piranha22]

Steve,

I am running a X445 Octura Prop.. As soon as I have a chance to run the boat again I will use my lazer temp gun to get an accurate temp on the motor before I gear it up.. That way I will know for sure how hot it is actually running..

Thanks,

Pete

[properchopper]

Pete, you mentioned that your motor runs "pretty hot". You need to be more specific ! Buy a temp sensor ; Steven sells one here for $ 24.99. Invest in a cooling jacket also. [ whoops, didn't catch your last post] Once we know what " pretty hot" really means, then better tuning decisions can be made. You have a really good rig, but all boats need some fine tuning to get it where you want. Hang in there ! :D