RallySoob

I got a smokin deal on a 3906, after going back and forth on upgrading it or notI decided I want to make it anice budget basher. Problem, I've been out of the RC game almost8 years and its changed alot

Goals:
WaterProof it as good as possible
upgrade to titan 775
Run times long as possible

Ideas:
Titan 775 motor + single motor mount, not sure which gears to run though
EVX-2 ESC? plus some sort of fan maybe?
I have no knowledge about Lipo batts and what the 'S' means, no idea what Ishould get but I know Iwant the longest run times possible. Speed/power isn't as important to me as run times.
I want to keep my 2speed tranny

*I'm not focusing on more power because I want to keep it cheap to drive. seems like the more power you have the more you break parts... I will be content with just the titan 775 motor. Should I be considering 7cell batts instead of Lipo for long run times?

*I will do the suspension related mods and wheelslater on. It handles well enough to have a good time. reliability and run times are most important to me

Iappreciate any help/suggestions..Thanks in Advance!
</p>

Radioman193

Well you would want to stay with 8.4v Ni-MH for water
the esc can be waterproof i would use Epoxi to water proof it. &gt;if its not a waterproof Version&lt;
byt why a power HOG 750 motor ????you would NEED twin 5000mAh packs inparallelto getGood runtimes.



here is my Home made motor mount with my titan 12t 550 motor.







and 12 tooth pinion and 66 tooth spur gear makes for a SWEET power curve and supper smooth shift from first to second gear. AWSOME off road Performance and 30 minutes on 2800mAh .</p>

and for the road i use a 21 tooth pinion with this spur and its PLENTY fast and with the same 2800mAh pack i only get 20 minutes like this.</p>

</p>

I Readjusted the grub screws on the forward and reverse gears on the output shaft to better work with electric insted of nitro now the transmission engages at a VERRY low motor RPM.</p>

and readjusted the shift point for electric.</p>

ALOT Better than usen a Differential out of an old junk rc thats not verry efficient and your stuck with that Gear Ratio other than to change your pinion gear.</p>

and puts your motors in stress as you shuld run a gear ratio that keeps your motor at about 90 to 95% of there rated efficiency or you will just get HOT motors and or Esc's and when this is going on your getting your battery pack hot as well cause your usen more amperage when your out of the motors efficiency range. there "sweet Spot" Thay WILL Fry its just a matter of time.


Just look here to see it :http://www.rcuniverse.com/forum/m_9861343/tm.htm</p>

RallySoob

I see what you are saying but I think you may have mistaken about the motors. I want to run 'ONE SINGLE TITAN 775 Motor'. I want the system to be water proof and the EVX-2 is waterproof so I'm going with that. ESC. I am Wondering what else I need to do to a 3906 to make it water proof like the new maxx/revo's are.

Thanks for the synopsis on gearing. I would like to know what people found to be optimal gearing when running a single titan 775 motor...


I've seen vids of a lipo powered E-revo with titan 550's running in a bath tub so I know they are waterproofing the lipo systems


*watch this video of Revo running under water, I want my 3906 to be like this: http://www.youtube.com/watch?v=_765SpNjdcM

Radioman193

Im NOT New to RC : http://www.beatyourtruck.com/forum/s...searchid=13083

And No Im NOTMistaken on the motors.
<span style="font-size: large">#1 a 750 uses twice the amprage as the 550</span>

<span style="font-size: large">#2 i did NOT say to change your ESC and your ESC will not need a fan</span>

<span style="font-size: large">#3 what about your Reciver "Rx" mine is incased in Epoxi with only the connectors exposed and have Water Insoluble Lithium Grease on them so thay dont corrode

</span><span style="font-size: large">#4 the lipo in that video is a "hard Case" lipo over time the sonic weld on the case will crack or just the case its self = Not waterproof no more then the <u>THIN aluminum tabs </u>on the cells build corrosion and you Cant tell if it has a problem like puffing and a lipo that is in a hard case will get HOT in a 1/8 scale truck in mud and water.
lust look at the picture


#5 you WILL Need to waterproof your servos The blue "Waterproof" servos are only water resistant the rubber seal will dry out and start to crack = Not waterproof no more then the servo controller board inside builds condonsation andcorrosion .www.traxxas.com/PDF-Library/071017_KC1106_MicroServoGearINST.pdf

I took my servos apart and coated the controller boards with Epoxi and the upper half of the servo i used Water Insoluble Lithium Grease.

#6 i put Water Insoluble Lithium Grease on ALLthe bearings

#7 I flush the motor with WD40 to displace water and keep it clean

#8 and Yes a fan to keep the motor cool is a MUST!

#9 the deans plugs on my battery packs i have have Water Insoluble Lithium Grease so thay dont corrode

</span><span style="color: #ff0000"><span style="font-size: medium">When i say WATERPROOF that is what it is NOT waterresistant
</span></span>
<span style="font-size: medium"><span style="color: #333399">most of what you see on the water videos will not last long = waterresistant for the short term water.
</span></span>
<span style="font-size: medium">My Trucks are in the water Most EVERY day and for 3 to 5 hours a day i have played the Plasti dip game and liquid tape game Thay DONT last!!!!
My way does</span>

RallySoob

thanks for reitterating. sorry for the confusion

RallySoob

I'm confused about the fact you are running a single titan 550, I've never heard of that until now...

Also, You are running a stampede esc in that pic...are you talking about stampedes? because I've been reading alot of reviews on the titan 775 and I have only heard good things when in comparison to twin 550's.

You aresaying that I should try to waterproof myoriginal maxx electronics like thestandard evx esc instead of buying an evx-2? I'm havin a hard time wrappin my head around that one. It seems like I should be buying all the newer waterproof servos etc. It seems the waterproof versions are more than just one rubber seal but I may be wrong



</p>

Radioman193

Now does my truck look like a stamppede ?? its a Converted T-maxx to a E-maxx
and go with the evx-2
i sed IFITSNOTAWATERPROOFVERSION
<span style="font-size: large">you need to read a post or a responce completely </span>not just skim for information



<span style="font-size: large">did you even look at the links , Videos and pictures ?
</span>and for traxxas waterproof servos take one apart and prove me wrong .
www.traxxas.com/PDF-Library/071017_KC1106_MicroServoGearINST.pdf


do what you want.....
But ill water bash with you just to see the truck that will last the longest without problems from water or mud.

and all i sed about your 750 motor was it uses 2 times the amperage than the 550 hence you will need larger packs


just click the links and all the words in my replys to you.
its Not hard to understand..............

and you do know that the "waterproof" Reciver box aint waterproof its water resistant with a gasket when the gasket starts to go bad you will start to getcondensation thatWILL kill it.

jord_trx2.5

just chuck a nitro engine init

Radioman193

<span style="font-size: xx-large"><span style="color: #ff0000">NOT!!!

<span style="color: #000000"><span style="font-size: medium">Another one that needs to READ

Nitro aint good for alot of water and Mud!</span></span></span></span>

Radioman193

And for gearing that is something you will need to find out yourself that depends on how youdrive and what you want to do
just dont go for LARGE gears cause all you will do is get a HOT motor and ESC with a battery that only last about 10 minutes
Pinion and spur gears are Dirt Cheap.

For a Pinion gear
i would try
a 11 tooth
a 18 tooth
and a 21 tooth


and for a spur gear
a 55 tooth
a 66 tooth
and a 76 tooth

try them in different combos .

RallySoob

eh dbagger-vance like I said I'm new, I just started learning about the emaxx a few days ago. From what I've learned you do not want to run one 12t titan 550 because it runs on half the voltage an emaxx puts out... I'm guessing thats why you have an XL-5 esc I duno?

read about 12T 550 NO GO here: http://monster.traxxas.com/showthread.php?t=528051

Bottom line though... I believe you have a slight grasp on this RC thing but I think your bad attitude and poor communication skills surpass any type of info you have to offer. Maybe you could not say anything unless you have something nice to say 'didnt your mom tell you that?'

Radioman193

dude i didnot say to use them
.
and in a emax with twins you dont use 2 titan 12t motors
and a titan 12t will handle 14.4 volts with NO problem.
and has no problem Hauling my 17.5 pound Maxx and still have 29 LBS of pull from a stand still.<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none"><div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none">

</div>

</div>
and please point out my " bad attitude and poor communication skills "
as i hale been willing upto now to spend this mutch time on this with you.

RallySoob

not sure about your grammar either... but thanks for 'spending time' trying to confuse the %$#@ out of me, I appreciate that :P lol

Radioman193

I Invite Others to find "problems" with this postIn what was sed and how it was sed.

youare mostlikely the ONLY one that cant understand.

i dont and cant see how you can be confused with this


<span style="font-size: medium">#1 a 750 uses twice the amprage as the 550 and with a 12T550 you get More RPM's Per volt so you dont need High voltage to run them</span></p>

<span style="font-size: medium">#2 i did NOT say to change your ESC and your ESC will not need a fan</span></p>

<span style="font-size: medium">#3 what about your Reciver "Rx" mine is incased in Epoxi with only the connectors exposed and have Water Insoluble Lithium Grease on them so thay dont corrode</span></p>

<span style="font-size: medium">#4 the lipo in that video is a "hard Case" lipo over time the sonic weld on the case will crack or just the case its self = Not waterproof no more then the THIN aluminum tabs on the cells build corrosion and you Cant tell if it has a problem like puffing and a lipo that is in a hard case will get HOT in a 1/8 scale truck in mud and water.
lust look at the picture </span></p>

<span style="font-size: medium">
#5 you WILL Need to waterproof your servos The blue "Waterproof" servos are only water resistant the rubber seal will dry out and start to crack = Not waterproof no more then the servo controller board inside builds condonsation and corrosion .www.traxxas.com/PDF-Library/071017_KC1106_MicroServoGearINST.pdf</span></p>

<span style="font-size: medium">I took my servos apart and coated the controller boards with Epoxi and the upper half of the servo i used Water Insoluble Lithium Grease.</span></p>

<span style="font-size: medium">#6 i put Water Insoluble Lithium Grease on ALL the bearings</span></p>

<span style="font-size: medium">#7 I flush the motor with WD40 to displace water and keep it clean</span></p>

<span style="font-size: medium">#8 and Yes a fan to keep the motor cool is a MUST!</span></p>

<span style="font-size: medium">#9 the deans plugs on my battery packs i have have Water Insoluble Lithium Grease so thay dont corrode</span></p>

When i say WATERPROOF that is what it is NOT waterresistant</p>

most of what you see on the water videos will not last long = waterresistant for the short term water.</p>

My Trucks are in the water Most EVERY day and for 3 to 5 hours a day i have played the Plasti dip game and liquid tape game Thay DONT last!!!!
My way does

and what is confusing about this ?

</p><div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none"><span style="font-size: medium">And for gearing that is something you will need to find out yourself that depends on how youdrive and what you want to do
just dont go for LARGE gears cause all you will do is get a HOT motor and </span><span style="font-size: medium">ESC</span><span style="font-size: medium"> with a </span><span style="font-size: medium">battery</span><span style="font-size: medium"> that only last about 10 minutes
Pinion and spur gears are Dirt Cheap.

For a Pinion gear
i would try
a 11 tooth
a 18 tooth
and a 21 tooth


and for a spur gear
a 55 tooth
a 66 tooth
and a 76 tooth

try them in different combos .

</span>
</div>

RallySoob

the part where you acted like I'm crazy for wanting a titan 775 and the fact you think the 12T 550 motor is better and its not according to the rest of the emaxx community.Your not even supposed to run that motor solo in a maxx, seems like alot of people agree. did you even click the link?

I'm not gonna argue with you bro, I don't exactly have a foot to stand on because I know jack in this gamebutYou could be less brashwith your arguements don't ya think.for a 2nd time...Thanks for the info

Radioman193

yes i used your link
but i have the proof.
[youtube]http://www.youtube.com/watch?v=mRY-Ac8-YvY[/youtube]

[youtube]http://www.youtube.com/watch?v=KbFuTiZxF5E[/youtube]

this was on a dead battery
[youtube]http://www.youtube.com/watch?v=cZZJdW5N8OI[/youtube]

see i have had this Motor in the truck for Over 3 months now and run it EVERY day and on some days upto 6 hours
and the motor dont get over 135
and the brushes are still about 97%

and Hauling a 17.5 pound t-maxx and still have 29Lbs of pulling power from a stan still i say aint to bad for a motor that DONT work in my truck.
its ALL in gearing.


and what i sed about your 750 was

"Why a power HOG 750 motor ????you would NEED twin 5000mAh packs inparallelto getGood runtimes."

this looks to be a question NOT aSlam or a statement to make you look stuped.
if your going to be on alot of forums you will need to learn to read the words for what thay are Not what you make of them.

and if you wish to learn something Ask if you Dont understand Dont just freak out on people cause its not put the way that you are able to understand it.

RallySoob

I would think I have alot more posts on the boards around the net than you since I've been building real toys for 10yrs now; quads, sti's, assault rifles/pistols, trucks etc. First time on a board where the toys are actuall toys and what do you know...here you are a real 15yr old know-it-all with an online speech empediment. give me a break... Iwas being polite you lil pratt. You've edited your posts how many times now...?

btw the stock 3906 I just bought for $35 is faster than your ghey lookin 12t550 maxx

Radioman193

I DINTTHINKSO :http://www.rcnuts.com/speedtests.htm

And with a remark like you just made shows your just a "kid" just like all kids do &gt;"mine is Better than yours is"

15 LOL LOL
i wish look at the profile dopey


UMMM 11 toothPinion gear and 66 tooth spur gear= POWER not speed .
30MPH is fine for me i dont need 30MPH off road or on the ROCKS

you do the math 17.5 pounds plus 29 pounds of pull its My total Lowend power top that with the E-maxx standard gearing.NOT going to happen!!!

RallySoob

Radioman193

With you YES!!!
I hope a mod will see this soon ........
why wait im going to find one .
its done.

stessman

I totally agree with rally

in the words of bart simpson "look out radioactive man"

Radioman193

agree with????
and I cant see how

<span style="color: #ff0000">he wanted to
WaterProof it as good as possible</span>

my help was in myFIRST reply was to this :
<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none">Well you would want to stay with 8.4v Ni-MH for water
the esc can be waterproof i would use Epoxi to water proof it. &gt;if its not a waterproof Version&lt;

<span style="color: #ff0000">then he wants toupgrade to </span><span style="color: #ff0000">titan</span><span style="color: #ff0000"> 775
for Run times long as possible</span>

and i ask :
<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none">why a power HOG 750 motor ????you would NEED twin 5000mAh packs inparallelto getGood runtimes.

<span style="color: #ff0000">then he wants
</span><div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none"><span style="color: #ff0000">Titan 775 motor + single motor mount, not sure which gears to run though
</span>
My reply was :

<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none">

12 tooth pinion and 66 tooth spur gear makes for a SWEET power curve and supper smooth shift from first to second gear. AWSOME off road Performance and 30 minutes on 2800mAh .</p>

and for the road i use a 21 tooth pinion with this spur and its PLENTY fast and with the same 2800mAh pack i only get 20 minutes like this.</p>

</p>

I Readjusted the grub screws on the forward and reverse gears on the output shaft to better work with electric insted of nitro now the transmission engages at a VERRY low motor RPM.</p>

and readjusted the shift point for electric.</p>

ALOT Better than usen a Differential out of an old junk rc thats not verry efficient and your stuck with that Gear Ratio other than to change your pinion gear.</p>

and puts your motors in stress as you shuld run a gear ratio that keeps your motor at about 90 to 95% of there rated efficiency or you will just get HOT motors and or Esc's and when this is going on your getting your battery pack hot as well cause your usen more amperage when your out of the motors efficiency range. there "sweet Spot" Thay WILL Fry its just a matter of time.
</p>
Then in the Next reply i gave him GOOD information on waterproofing
plus he did not know about the Traxxas "Waterproof" servos so i added a link to show him.

and that was :

<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none">

<span style="font-size: medium">#1 a 750 uses twice the amprage as the 550 and with a 12T550 you get More RPM's Per volt so you dont need High voltage to run them</span></p>

<span style="font-size: medium">#2 i did NOT say to change your ESC and your ESC will not need a fan</span></p>

<span style="font-size: medium">#3 what about your Reciver "Rx" mine is incased in Epoxi with only the connectors exposed and have Water Insoluble Lithium Grease on them so thay dont corrode</span></p>

<span style="font-size: medium">#4 the lipo in that video is a "hard Case" lipo over time the sonic weld on the case will crack or just the case its self = Not waterproof no more then the THIN aluminum tabs on the cells build corrosion and you Cant tell if it has a problem like puffing and a lipo that is in a hard case will get HOT in a 1/8 scale truck in mud and water.
lust look at the picture

</span></p>

<span style="font-size: medium">
#5 you WILL Need to waterproof your servos The blue "Waterproof" servos are only water resistant the rubber seal will dry out and start to crack = Not waterproof no more then the servo controller board inside builds condonsation and corrosion .www.traxxas.com/PDF-Library/071017_KC1106_MicroServoGearINST.pdf
</span><span style="font-size: medium">I took my servos apart and coated the controller boards with Epoxi and the upper half of the servo i used Water Insoluble Lithium Grease.</span></p>

<span style="font-size: medium">#6 i put Water Insoluble Lithium Grease on ALL the bearings</span></p>

<span style="font-size: medium">#7 I flush the motor with WD40 to displace water and keep it clean</span></p>

<span style="font-size: medium">#8 and Yes a fan to keep the motor cool is a MUST!</span></p>

<span style="font-size: medium">#9 the deans plugs on my battery packs i have have Water Insoluble Lithium Grease so thay dont corrode</span></p>

When i say WATERPROOF that is what it is NOT waterresistant</p>

most of what you see on the water videos will not last long = waterresistant for the short term water.</p>

My Trucks are in the water Most EVERY day and for 3 to 5 hours a day i have played the Plasti dip game and liquid tape game Thay DONT last!!!!
My way does

</p></div>
</div>and then gave him some place to start with gearing

and that was this :

<div style="border-bottom: medium none; text-align: left; border-left: medium none; background-color: transparent; color: #000000; overflow: hidden; border-top: medium none; border-right: medium none; text-decoration: none"><span style="font-size: medium">And for gearing that is something you will need to find out yourself that depends on how youdrive and what you want to do
just dont go for LARGE gears cause all you will do is get a HOT motor and </span><span style="font-size: medium">ESC</span><span style="font-size: medium"> with a </span><span style="font-size: medium">battery</span><span style="font-size: medium"> that only last about 10 minutes
Pinion and spur gears are Dirt Cheap.

For a Pinion gear
i would try
a 11 tooth
a 18 tooth
and a 21 tooth


and for a spur gear
a 55 tooth
a 66 tooth
and a 76 tooth

try them in different combos .</span>
</div>
</div>
</div>

at first he was thinkingi was telling him to change his ESC

and I was NOT

then he got stuck on this motor bit and i NEVER told him not to use the 750.
and after telling me it"wont work"
I just put up some proof that it does work and on even a truckwith aweight More than the E-maxx.
still Not telling him to use the 550 just showing the informationhe had was Not a fact that was all.
</div>

<span style="font-size: medium">All the information he wanted and Needs is here.
</span>

stessman

I think you gave some good advice but also some not so good. And isnt the motor a 775 not a 750?

Radioman193

and what is the Not so good information if i may ask?

you know in the "World of Rc" alot of people just go "By the Book" orwhat somebody tells themfrom what they read in a book .
and thay dont try to find ways to do things there way .
like all the Oldtimers can tell you ALL kinds of ways of doing things and getting arround problems that the "younger" ones will not listen to .
Untill thay NEED to find a way to do what thay need .... then thay find a way ..that is Not "by the book"... then when thay look back at what thay were told to try thay see that person was correct.

But I do try to find ways to prove that it can be done and done properly to disprove the old wives tails about things or to disprove the ones that say you cant.
"can't never did nothing"
if mankind did not try what was thaut to be inpossable or do what thay were told it wont workthen we would still be liven in caves and have no computers and cell phones and stuff.

but i have been waterproofing rc's for YEARS now homemade Rc boats ,waterproofing Helicopters and airplanes so i have tryed all the "tricks in the book" Most are not LONG lasting fixes to the problem to waterproofing.
gaskets dry out and plasti dip and liquid tape crack with hot and cold change orfrom getting dryed out with age.


Im not on a forum to act all macho or to say mine is Better than yours
or to make people have problemsthose are kids games not for usmature adults.

i like to share the knowledge that i have acquired in my years
cause ya cant take it with ya when you go.

so the ways and things that Isuggest work and DONT fail.
and can prove all that i say and do.

and750 type Motors can be found in rc boats mainly
and yes the 775 is the most common in 1/8 scale trucks.

RallySoob

LOL!






Your intentions are good...I commend that. But your trying too hard and coming off a lil over zelous. your alright tho