60 mph mamba brushless setup for e-maxx, would this work?

[coolhandcountry]

Get you a mgm 32120 and motor with good kv rating. Not sure with out doing
research. Put 5s on each side and let the fun begin. That would be my plan for a 60 mph truck. Good luck on drive line parts.

[extremexmods]

I was just looking around and now I see how hard 60 mph is to reach, so I decided to drop my goal down to 50 mph. Could this be reached using 12 cells and the mtroniks genesis truck combo? Mtroniks claims 80kph on their website, which converts to 50 mph. Just how accurate are their claims? I hear their customer service is great. What size feigao motor is this equal to, and what size shaft does it have? The website says 600 size motor, but how does that compare to 540XL? Would this be a good setup for a stock e-maxx? I have decided to stay with a stock length chassis setup so I can keep using my rollcage. I am using the 2 speed transmission, I will not always be in second gear, but will spend most time in first gear and shift in to second only when I decide to go for a short speed run. I am seriously considering this combo, anyone who has it (Mtroniks Genesis Truck esc and Mtroniks Plasma Truck 600 motor) please tell me if I will need 5mm pinions or 1/8" pinions. Also, would this motor work with the rc monster heat sink motor clamp? Also, would this motor fit the stock e-maxx mounting plate? This setup also is attractive to me with the waterproof esc because I live in an area that has lot of rainy days (over 200 per year), and I want to have plenty of days to drive my truck.

[extremexmods]

Can anyone reply? Thanks.

[coolhandcountry]

Promod has been 50 mph on 12cells. He ran a 2240. I not sure exactly how much of a difference that makes.

[Serum]

that was with an XL3100. the 50mph on his 2240 took him 4S.

[extremexmods]

So what about the mtroniks combo? Is it any good? What pinions would I use?

[Finnster]

The Mtronks are nice enough controllers, i have one in my Rustler. Just they are not rated that high amp/volt wise (80A/12cells), and are not that programmable (not like a MM.) The MM is rated higher, easier to find/service and no more expensive. 12cells/80A does not add up (techically multiply ;) ) to a lot of wattage.
To get max speed out of it you can try a huge motor like above, or I've seen people that run high hv L motors wich can go fast, Just they run hot. I thought RCM Mike had an article where they put an 8L into an MT and broke 50 mph on 4S. I have doubts about doing that on 12 cells.

This is still a dragster, its not going to be that reliable for bashing. careful not to fry the motor/esc

[extremexmods]

Using 12 cells and a Mamba Max esc, could I use the wanderer 6XL? I know for a fact I will stick with a 12 cell setup. I see on the feigao motor chart (same as stats for tbe BK Wanderer) the Feigao 540 6XL has a max amp rating of 110, would this be constant? Also, on the kershaw designs website I see they have motor bearings rated for 70,000 rpm and 100,000 rpm. What would happen in real life with those rpm speeds?

[TexasSP]

Dude, based on your limited knowledge, cashflow, and experience. I would start with a nice 38-42 MPH setup. Driving an emaxx at 40 MPH is no picnic and takes a lot of control. Use the MM control, 4s lipo, UBEC, and an 8 or 9XL with proper gearing. Baby step this thing or you will end up dissapointed. Promod and any of the other guys that made 60 MPH didn't do it as their first or even second setup. Take some time, do it right and you will be much more satisifed in the end.

[Procharged5.0]

Originally Posted by extremexmods

Using 12 cells and a Mamba Max esc, could I use the wanderer 6XL? I know for a fact I will stick with a 12 cell setup. I see on the feigao motor chart (same as stats for tbe BK Wanderer) the Feigao 540 6XL has a max amp rating of 110, would this be constant? Also, on the kershaw designs website I see they have motor bearings rated for 70,000 rpm and 100,000 rpm. What would happen in real life with those rpm speeds?

My personal opinion (I have a mechanical & electronic engineering background) is that the XL motors and in particular the 540/550 sized motors are too large to spin t those extreme rpms. The balancing on the motors would have to be much more precise and even then there would be problems. Smaller motors can spin faster with better success.

Remember too that hi-rpms are VERY requiring on the ESC as well. Processing at 75,000rpm is far more demanding (and not possible on certain ESC's) that at 25,00rpm.

[extremexmods]

So maybe 12 cells, 7XL, mamba max esc gear for 45-50, keep everything lightweight meaning no added aluminum. I said in an earlier post that I decided to tone things down to 50 mph. Lipo is not an option, my family has banned lipos and I really do not think they are safe enough for truck bashing use. My current setup is the kershaw designs dual 970 ,motor setup, which goes 45 mph and has a very high center of gravity, much higher thank stock, I set them up with a high ground clearence and had now difficulty handling the truck.
Take a look at the picture of the slammed maxx on this page, I am using those towers and will slam the truck low for street handling. I only hope the mamba esc could take a 7XL on 12 cells, but I am prepared and to use an 8XL if I could safely gear it up to 7XL ground speed. In all cases, lithium is out of the question, decision by family (parents), and something I can't control. About the motor bearings, I would never run a motor that fast, I just was curious about what the motor would do at those speeds. I guess it would self destruct. My motor will be heatsinked. I will spend most time in first gear, second gear only for occasional speed passes on the street.

[extremexmods]

Just researched and have figured the 7XL is too much for the controller, I will use a the 8XL instead.

OK, I don't remember. Have you ever built a brushless monster truck before? I'm just asking, because you seem to be very pre occupied with speed. Of course, most of us go through that stage, but it comes when you get to a point where you have gained some experience.

If this is your first conversion, I think that you should be looking for a solid setup that will turn on and roll when you want it too. I'd go with a MM and a 9XL. A nice conservative setup that will surprise you with its speed when geared right.

[suicideneil]

I would say an MM & 8xl or 9xl was about perfect to start with too. If you take a look at the thread "bombproof products truck quick vid" you will see that someone who has a vast amount of money (must have to keep replacing toasted escs) & experience with a truelly awesome truck, with massively powerful batteries - 36v lithium - and serious BL motor, yet he can only manage 59mph because parts keep failing on him. Now take a look at your stock, plastic, standard wheel base truck with high CoG, and try to imagine the technical problems you will face, let alone the finacial costs. If you want a fast truck, convert a mini-t to BL with a MM setup, and it will easily do 60+mph (videos on BYT). Food for thought.....

[Finnster]

Originally Posted by AAngel

OK, I don't remember. Have you ever built a brushless monster truck before? I'm just asking, because you seem to be very pre occupied with speed. Of course, most of us go through that stage, but it comes when you get to a point where you have gained some experience.

If this is your first conversion, I think that you should be looking for a solid setup that will turn on and roll when you want it too. I'd go with a MM and a 9XL. A nice conservative setup that will surprise you with its speed when geared right.

Hear hear, this is the way to go.

Its makes no sense either that you would build a truck "toned down to 50mph", and then drive in 1st most of the time. :032: You're likely to overheat the system as well if you undergear/over rev it. Build something solid first, then worry about landspeed records when you get more $ and the ability to use lipos.