Top speed race class

[lincpimp]

Keep in mind that the 6l and neu have 5mm shafts, so you could go up to a 25t mod1 pinion and 40t revo spur. That should get some serious speed, and heat.

[jzemaxx]

Anymore suggestions before I order.....

I will either go MM or 9920 on the ESC's and then have to decide on the motors. May go ahead and order the ESC's today if I can find the 9920 preferable or the MM as a backup in stock

[Promod]

What are they calling a monster truck? Could you run a smaller truck? Is there a tire size limit? Are you allowed to run with no body?
Keep it as close to 10 pounds a possible. Run the best batteries you can find. If you need to run an E-maxx size truck with a large tire I think 65 to 75 mph is going to be very hard on 3s. Would think in the 50 mph range would be closer.
Not sure haven't tried all the new motors/speed controls/batts out there.

Promod

[Serum]

Hey Barry! good to see you are still around.

Did you get a change to test the flightpowers yet?

well, while you where not around, not much has happened. Neu motors are pretty hot nowadays, 4 polers with an awful lot of torque. Neu also carries batteries now (lipo)

on 3S 60mph would be pretty hard, it requires roughly 2000 watts on a normal maxx; so that would be roughly 180A of current. It requires a motor with a very low internal resistance to be able to handle/drain that from the batteries.

[squeeforever]

I don't think it will be terribly hard to get to 60. My Maxx was running 50 on 12 cells with a XL3100.

[Serum]

60 on 3S is a totally different bag though.

Promod was the first to get in the 50mph zone with the XL3100 on 12 cells. I remember i pointed you to that thread on another forum squee.

[Promod]

Never did test the flightpowers, still setting on the shelf not even used. Been thinking about putting a truck together.
Need to do some reading and catch up in the new stuff. Just a noob now.

That is exactly what I was thinking, 60 in an E-maxx size truck is asking alot for 3s.

Promod

[Serum]

I noticed you sold your twinforce? how about the new 3905 max? comes with 2 steel gears in the gearbox, singlespeed, camshaft servo saver and pretty tough driveshafts.

[Promod]

squeeforever, not saying it can't be done. But with a 10 pound E-maxx size truck with E-maxx size tires it will be very very very hard.
Find out exactly what the rules are and and look at the best ways to cheat. I mean think outside the box.

Promod

[Promod]

Are those new trucks strong? Not a money pit like the old E-maxx I hope. Really don't know a thing about them. Would run 3 or 4s.

Promod

[Serum]

Would be fine;

They updated the diffs as well; still two planetary gears with two satelites, but they upgraded it with an extra steel insert. (tunable with silicone-oil) they also increased the chassis length, and lowered the entire CG of the batteries a bit.

here, the exploded with the diffs;
http://www.traxxas.com/PDF-Library/3905_rear.pdf

[Promod]

Thank you for the information!



Promod

[squeeforever]

Yea, I think a twin setup using MM's and possibly something like high KV 1509's, Komodo LP's and a low stance with a wing. It should be be possible to see 60 or maybe 65.

[SpEEdyBL]

I think it can be done. Kind of like what I said before, if one 5lb stampede can go 65 mph with one motor on 3s (the vxl system for example which is close to a cm4600), a 10lb exmaxx should be able to go 65 mph with 2 motors and two 3s packs. Its simple math. Also, I bet Promods 12 nimh cells back then dont even come close to comparing to the capability of the best 3s packs, which you could improve even more by adding cells in parallel. And on 3s I bet one lehner 3100 xl motor will not even come close comparing to two cm5700s for that matter.

[squeeforever]

Hmm, perhaps he should go with two Lehner XL's?