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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 8:24 AM   
Foxy



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Status: offline 		German guy may be right, there are quite a few ESCs which don't like 5S. If you have the option to specify total voltage to cut off, simply set it at 3.2*5=16v, rather than specifying how many cells explicitly, this is an effective workaround for quite a few ESCs. Of course knowing that your cutoff should be 16v, you can leave it in 4S mode and set the cutoff at 4v per cell. That will work too, as the ESC will only look at the total volts, it can't inspect individual cell voltage through a deans plug.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 12:18 PM   
HerrSavage


 

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Status: offline 		Just hooked up the Hobbywing program card. Only reads up to Item 5. So I guess I need a more advanced ESC to use the other stuff?

My LVC was set at 3.0V?!!... Changed it to 3.4V. Guess that's why I was getting decent run times....

I also changed the brake power or whatever to %50, since I think I've heard people say to do that...

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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 1:46 PM   
Foxy



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Status: offline 		50% is a lot of brake power in a 1/8th.

By the way, I run all my LVCs at 3v, recommendations for high cutoffs stem from the fact that lipo used to be dangerous and short-lived. This is no longer the case. Setting the LVC to more than 3.2 is just wasting runtime if you ask me.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 2:05 PM   
Haddi Taha



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quote:

ORIGINAL: Foxy

50% is a lot of brake power in a 1/8th.

By the way, I run all my LVCs at 3v, recommendations for high cutoffs stem from the fact that lipo used to be dangerous and short-lived. This is no longer the case. Setting the LVC to more than 3.2 is just wasting runtime if you ask me.


+1 I use 3.0v and have never had any issues and all my celles end up around 3.5v when I put them on the charger if the lvc kicks in

But one of his packs always has a cell that finishes at 2.9v so it may be better if he sets his lvc at 3.2v just in case, and it will probably make 2 minutes difference in runtime

For 5s you just have to set the lvc to 2.8v so it recognises the 5s as a 6s but if you want to run 4s or 6s afterwards, you must change it back to 3.0v or more



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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 2:08 PM   
HerrSavage


 

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Status: offline 		Just went and checked - I had set it to 3.2, not 3.4. In any case, at least I've learned how easy it is to set the ESC for 5s - just go to Item 3 on the program card and change it from setting 5(3.2) to setting 3(2.8)..

What I'd still like to know is to what extent running 5s with a 14T pinion is a bad idea. Nobody ever mentions 13t pinions? Surely 13 would be a compromise between 4s and 5s, and would be fine for both? Would be nice to not have to change the pinion, and have one that worked for both...

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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 3:04 PM   
Foxy



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Status: offline 		I use a 13 when I don't know what batteries I'll be using as it is the best middle ground, keeps the car in one piece on 6S and is quick enough (just about) on 4S. That's 13/46 on the Xray XT8 which also has a high final drive, so it would be like a 14 on other cars. However, your tires are bigger, so no real difference. If I knew I was going to be running 4S only, I'd bring along a 16 and an 18.

Also, this setting you mention for 5S...what do you mean change it from 3.2 to 2.8? You mean when the esc thinks it has 6S attached? The important thing is how many cells the ESC thinks it has connected at any given time. Assuming you want a 3.2 cutoff, if the ESC thinks it has 4S, set it to 4.0v per cell, if the esc thinks it has 6S, then 2.7, not 2.8 (assuming that's an option, of not, 2.8 will be ok)

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RE: The Official Thunder Tiger MT4 G3 thread - 1/4/2013 8:25 PM   
Maj_Overdrive


 

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Status: offline 		As you know the bigger the pinion the higher the top speed will be with slower acceleration because of the increased load on the motor. This is just like nitro, and the electric motor will pull more amps with a bigger pinion just like a nitro will suck more fuel. The difference is the electric motor will heat up under increased load.

Now, an electric motor will draw a certain amount of amps according to vehicle weight, gearing, tire size etc. Multiply amps by voltage and you get watts. Assuming nothing is changed except you increase voltage (ie 4s to 5s) the motor will gain rpms, increasing top speed which increases load and heat. If your truck was geared for say 40mph on 4s and 40mph on 5s though, the load hasnt changed and the wattage used will be the same. But since you increased voltage the amps will decrease and the temps should be lower on the 5s setup. This is because the load on the motor is the same and the 5s setup has more power to work against the load.

This is generalization of course just to explain the concept. I'm sure there are cases where you can increase voltage without changing the gearing and be fine, but there's too many variable for me to say you'll be fine with x voltage and y gearing, maybe a fellow G3 owner can chime in with personal experience. My personal experience with 1/8 and motors similar to yours says that 50mph is going to be kinda borderline with heat. You'll probably be ok now, but maybe not so much in warmer weather. Try it out on 5s with 14t and check the motor temps every couple minutes on the first pack or two.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/6/2013 9:04 PM   
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Status: offline 		about the LVC u could buy one of these http://www.amainhobbies.com/product_info.php/cPath/1574_1727/products_id/183759/n/Team-Integy-LiPo-Voltage-Checker-w-Warning-Alarm its alittle better because it plugs into your balance connector and there no need to reprogram your esc each time you change you lipo cell count

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RE: The Official Thunder Tiger MT4 G3 thread - 1/6/2013 9:16 PM   
HerrSavage


 

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Status: offline 		Thanks.. I think I'm good with the charging, checking, etc.. now. (Hope so anyway...)

Changed from 50k to 100k in the middle diff today - WHAT AN AWFULL PIA.................... Stripped out a few screws, it wasn't meshing, sticky silicon oil everywhere, etc...

So anyway, keen to go check it now - new steering servo in , 100k in the center, and a 14t pinion. Would have tested today, but the weather has been unrelentingly horrendous..........

I think I'm going to order a 13T pinion now, and then just leave it at that for both 4s and 5s..

Also want to order some HPI/HB hinge pins, as these are apparently the weak point on the truck.. And a spare spur gear, if I can find one...

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RE: The Official Thunder Tiger MT4 G3 thread - 1/8/2013 1:33 AM   
Haddi Taha



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quote:

ORIGINAL: HerrSavage

Thanks.. I think I'm good with the charging, checking, etc.. now. (Hope so anyway...)

Changed from 50k to 100k in the middle diff today - WHAT AN AWFULL PIA.................... Stripped out a few screws, it wasn't meshing, sticky silicon oil everywhere, etc...

So anyway, keen to go check it now - new steering servo in , 100k in the center, and a 14t pinion. Would have tested today, but the weather has been unrelentingly horrendous..........

I think I'm going to order a 13T pinion now, and then just leave it at that for both 4s and 5s..

Also want to order some HPI/HB hinge pins, as these are apparently the weak point on the truck.. And a spare spur gear, if I can find one...


Don't you have good access to associated spare parts?



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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 1:04 AM   
Haddi Taha



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My new Jconecepts Illuzion Ford Raptor SVT for Revo 3.3 body shell on my mt4. I accidently sprayed lots of black where there was suppose to be white but I used dot 4 brake fluid to clean it up. You wouldn't ven know I made a mistake if I didn't tell you 

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 6:49 AM   
HerrSavage


 

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Status: offline 		Looks good.. I'd do black though - white will look thrashed pretty quickly.. I just paint everything black now. All bodies end up thrashed, and black sort of still looks cool all mangled up..

Yeah, I have AE parts here at home even. But I've heard mixed things about running steel spur gears - as in it can be bad..

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 7:19 AM   
Haddi Taha



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Looks good.. I'd do black though - white will look thrashed pretty quickly.. I just paint everything black now. All bodies end up thrashed, and black sort of still looks cool all mangled up..

Yeah, I have AE parts here at home even. But I've heard mixed things about running steel spur gears - as in it can be bad..


I also like black alot the only issue is that I have problems seeng them at night. I plan on converting to a truggy later with black proline mugen mtx6 shell, black wing and black wheels, its going to look epic

To use a steel spur gear you need a stronger hardened steel pinion like the Robinson Racing ones so the pinion can handle the abuse. 

Everyone had their own experiences with plastic and steel spur gears. I like steel gears much more as they never strip but I won't use one without a center diff or slipper clutch. 



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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 7:23 AM   
HerrSavage


 

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Status: offline 		Well I have a 14T RR pinion in right now, and wouldn't mind buying for ex. a 13T too..

It is also pretty hard to find the 50T plastic SG as a spare part.. I've probably even got a couple steel 50T RC8 SG's around.. At least a 48T or 52T...

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 9:30 AM   
speedeur


 

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Status: offline 		Hi from France. For the choice of my combo I will go with Xerun 150 A and a leopard motor the 4274. Can you confirm it's a good choice for my MT4 ??

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 11:35 AM   
Haddi Taha



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Hi from France. For the choice of my combo I will go with Xerun 150 A and a leopard motor the 4274. Can you confirm it's a good choice for my MT4 ??


perfect, what kv is the motor? Are you going to be using 4s or 6s



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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 11:35 AM   
Foxy



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Hi from France. For the choice of my combo I will go with Xerun 150 A and a leopard motor the 4274. Can you confirm it's a good choice for my MT4 ??

This is almost the same as the electrics that are in the car from Thunder Tiger. Good choices.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 11:36 AM   
Foxy



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quote:

ORIGINAL: Haddi Taha


quote:

ORIGINAL: speedeur

Hi from France. For the choice of my combo I will go with Xerun 150 A and a leopard motor the 4274. Can you confirm it's a good choice for my MT4 ??


perfect, what kv is the motor? Are you going to be using 4s or 6s



It's a 2000kv, so its ideal.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 12:40 PM   
HerrSavage


 

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Status: offline 		I think I've read that the stock MT4 motor is a rebadged Leopard, and that there is another Leopard that's even more powerful(and prob not much more expensive..)?

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 12:47 PM   
Foxy



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I think I've read that the stock MT4 motor is a rebadged Leopard, and that there is another Leopard that's even more powerful(and prob not much more expensive..)?


I believe its a hobbywing. As for 'powerful', in relation to electric motors, you can think of stator length as being like displacement for engines. The longer the stator the more torque (as a general rule, other factors are also involved, suffice it to say that under most circumstances, regarding two motors of the same diameter and architecture but different lengths, the longer is the more powerful.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 12:51 PM   
speedeur


 

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Status: offline 		Yes I will take this 2000 kv motor and I will run with 4s and 5s lipos I think. The leopard 4274 have a 4.2 cm diameter, is the motor mount ok for this size ?
It's this one : http://www.leopardhobby.com/product/product_veiws.asp?id=1344&functionID=01020220

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 12:54 PM   
Haddi Taha



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Status: offline 		Speedeur, thats motor should work perfectly

Foxy, I don't think its a Hobbywing, the only smooth can (no fins) hobbywing 1/8 motor are the sensored buggy ones. But they are probably made in the same factory or something with all the other chinese motors
 
Its looks pretty similar to this
 
 
Whatever it is, its a pretty reliable motor that has lots of power, but I'm liking my Hobbywing Xerun 4274sd Sensored Motor more, has an extra 200kv yet still runs a bit cooler than the ttr stock one. Shame there is no sensor port int he ace rc esc though despite it being based on the hw xerun 150a esc


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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 1:01 PM   
speedeur


 

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Status: offline 		Cool thanks for your answer I will make an order of this combo. Can you give me an idea of wich lipos I can take for it ?
Is there any model with good quality/price to run in 4s or 5s at the hobbyking store or another website ?
Thanks


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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 1:09 PM   
Foxy



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Status: offline 		Get from hobbyking the NANOTECH batteries, at least 5000mAh and at least 30C. Also remember that hte MT4 has a small battery tray, only up to 139mm length.

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RE: The Official Thunder Tiger MT4 G3 thread - 1/9/2013 1:12 PM   
Foxy



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ORIGINAL: Haddi Taha

Speedeur, thats motor should work perfectly

Foxy, I don't think its a Hobbywing, the only smooth can (no fins) hobbywing 1/8 motor are the sensored buggy ones. But they are probably made in the same factory or something with all the other chinese motors
 
Its looks pretty similar to this
 
 
Whatever it is, its a pretty reliable motor that has lots of power, but I'm liking my Hobbywing Xerun 4274sd Sensored Motor more, has an extra 200kv yet still runs a bit cooler than the ttr stock one. Shame there is no sensor port int he ace rc esc though despite it being based on the hw xerun 150a esc



You're right, after only a little research, I discovered that the Ripper motor is in fact a Leopard 4074.

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