David VS. Goliath!!

[Promod]

Did some speed runs today.

The first runs were with a Lehner XL1600 and 6s kokams. Gearing was set at 12/51 with the center diff. The best speed was 50.2 mph.
The little lehner XL makes good power but the small motor runs HOT. I just don't think the motor was made for these high watts. It has a small amount of cogging on slow take off. When floored will wheelie the truck about 6 inchs in the air but will not flip the truck over. Not a bad motor weighing in at 216 grams but would need fans to run cool in the summer.
Now for the BIG BOY!
Speed runs with the Lehner 2240/10 using 6s Kokams. Started out with 14/51. This gearing is used for bashing and runs stone cold. The speed was over 54 mph with temps not breaking 100. Using 16/51 gearing temps were around 125 and the best speed was 59.7 mph. The combo will run 60 mph plus easy.
The road in front of my house had stone chips and tar put down not that long ago. It's real hard to keep a 60 mph monster truck strait skating on pea gravel. The Truck went for some crazy cartwheels and flips but came back begging for more.
The 2240's are my favorite motors. They are very costly but run cool and make big power. The motors weight is 480 grams. This motor has no cogging at all and can do the "drift backwards slow take off" trick with no cogging. The 2240 will wheelie and flip the truck(can't beat the Nitro boys on you back:L: ).
Sorry for the book but felt like passing some info along.
Thank you,
Promod

[Promod]

The truck

[Promod]

One more

[RC-Monster Mike]

Well, I guess it is only right that the big motor put out more power. Still, 50 mph is pretty impressive for the xl1600. That 2240 is some beast of a motor. Nice truck, too! I may try some speed runs with my 1940/8 some day. The xl2400 runs plenty strong on 5s Lipo for me, and on 6s lipo, it can pull wheelies at most any speed up to about 30mph(no center diff, though), but this is too much for the track (5s is too much on most tracks!). I have a nice, paved road in front of my house, so I can get some speed without fear of the truck wandering(though traffic can certainly be an issue!). Thanks for the Info. That is one heavy motor, huh! More than enough for an e-maxx.

[Serum]

Awesome!! i was thinking about getting a 2250, but i guess the 2240 is more than enough motor for the maxx/savage..

did you hang your eagletree in that car? (i am curious about the current it takes from the kokams)

are those HB tires?

[rchippie]

Promod what diff is that ?.


Serum i think those tires are either hpi nubs, or the new panther boas.

[Serum]

It is an Ofna diff.

It are HPI NUbz allright.. makes me wonder.. What 17 mm hub Promod uses..

[Promod]

Yes it is an ofna diff. From an mbx buggy. It uses the same spur as the strobe slipper clutch. Yes they are nubz and I really like them. HPI did a good glue job because they stayed on for all the speed runs an still look great. The nubz are heavy. Here are a few weights.

Nubz 216 grams each
Bowtie,firm foams,veliocity wheel 208 grams each
Traxxas response on revo wheel 192 grams each

The 17mm hubs are from ofna. I've had them for a few years. But Towerhobbies still sells them http://www2.towerhobbies.com/cgi-bin...?&I=LXXE06&P=7

The 2240 is giving the Kokams a work out but everything seems fine so far. The 2240/10 6s peaked at 110 amps and pulled 70 normal. Peaks watts was 2300. I also tried the 2240/12 with 9s. The watts with this combo peaked at almost 3500.

Thank you,
Promod

[RC-Monster Mike]

3500 watts is almost 5HP! That is just palin rediculous for an e-maxx! I wish I could have seen it!

[TwzteD]

more hp than my lawnmower

Wow!! That motor's huge! I couldn't imagine what it's like driving that truck at 60mph. Looks like a real money pit too, lol.

[coolhandcountry]

What kind of run times you getting with that 2240? It sound awesome. I like the sound that you could run at that speed and the motor kept cool to. I wonder if mike can get one of them.

[Guile]

Hi,

It's a very nice truck...
A video of the monster ?

[Chase023]

I am assuming that you favor Lehner motors, like how I like Hackers and Plettenberg Motors, hehe

What controller are you using for the 2240s?

[Promod]

Never really checked the run time but it is over 15 miniutes. That being said run time is greatly affected by driving surface and driving style. I'm just a Backyard Basher so the truck is run on mostly grass and driveway. My driving style is ON/OFF don't need a radio just a switch:D .

Guile, I can shoot a movie might take a few days to get the time.

Chase023, It's not that I favor Lehners but the 2240s WORK! I've tried almost every motor type out there starting with the old Model Tech. The speed control used for tests above was a Schulze 12.97. But the warrior 9918/9920 work just fine.

I hope from the tests above that everyone can see you don't need fast turning motors to get speed. Some people on these boards still think you need to push a BL motor to its RPM limit to get speed. That is old thinking and just not the case. There is nothing worse than a hot running BL system. What good is 10 or 15 miniutes run time if the motor is smoking HOT in 5 miniutes. If anyone is on the fence as to which BL motor to get. Get the slower turning motor and use gearing to get the speed. You will be much better off.


Thank you,
Promod