View Full Version : BL for Nitro Racing
This summer I will be running a MF2 outdoors on a fairly large track and must run with nitro stadium trucks. I understand I will need an 8000mah battery but was wondering what motor will be required to compete. I have an extra Novak GTB so was leaning twoards one of their BL motors. Any suggestions? 6.5, 5.5 or?
aqualato1
04-12-2006, 12:22 PM
Is the track more turns or straight aways? A picture of the track would be great.
kufman
04-12-2006, 04:29 PM
For a stadium truck I woud guess a 6.5 or 7.5. The 4.5 and 5.5 are more touring oriented.
Is the track more turns or straight aways? A picture of the track would be great.
I'll be racing here, http://nitrofarm.com/. Unfortunately there aren't too many pictures on the site and I've never been so I can't provide much usefull information. Perhaps someone else who is familiar with the track could answer this question better than I.
Watch your diff adjustments--I never had much luck keeping a good 9x1 brushed motor from either burning the slipper or destroying the diff in my MF1
aqualato1
04-12-2006, 09:57 PM
I too would suggest the 6.5 or the 7.5. The 5.5 would be fine in an ST (I use one) but it is very hard to control. So unless you can drive like a expert and not be throttle happy you might be ok with the 5.5. But the 7.5 might be your best bet.
scoob
04-12-2006, 10:54 PM
I've raced Pro-Truck class agsinst nitros a good bit, I use the 6.5 in a T4 with 8000 li-po. I've never felt like I was at a power disadvantage (I'm just a poor driver) against any nitro trucks but I have against some of the other BL trucks that run the 5.5 or Plettenburg extreme. Even so, I can clear all the jumps that they can and I don't see much difference in straight-away speed. It's plenty of power.
A nitro may get you on a really really long straight, it would have to be pretty long though, my setup (6.5) tops out at 39 mph. Most everywhere else I've found an advantage over nitros due to quicker throttle responce and more explosive power on large, short aproach jumps,and out of turns, ect. As long as you can get traction and keep the front end down you should do fine.
The 7.5 would work fine too I'm sure. Heck, I started out with the ss5800 and it was powerful enough to be competitive but couldn't quite match nitros (or other BLs) on the straights.
Now the class is pretty much separated since there are enough BL trucks in the area to have our own class.
Thanks for all your help. Think I'll go with the 7.5 since my driving skills are sketchy at best.
aqualato1
04-13-2006, 05:34 PM
Yeah, and if you want more power you can just buy the velociti 6.5 or 5.5 and put connectors on the power wires so you can switch them out.
Yeah, and if you want more power you can just buy the velociti 6.5 or 5.5 and put connectors on the power wires so you can switch them out.
That's what I had in mind since I will need to install a 4300 for spec indoor racing.
Craps
04-14-2006, 06:11 AM
Get the 5.5 or 6.5 motor. Too much power, just cut the throttle percentage back. Some guys cut the 5.5 back as much as 50% to tame it down, but if they need more power they just turn it back up!
TimisTim
04-14-2006, 03:37 PM
Watch your diff adjustments--I never had much luck keeping a good 9x1 brushed motor from either burning the slipper or destroying the diff in my MF1
I have run this truck for about 4 years now. The way to run the diff is cranked all the way down and a little loose on the slipper. Sure it will hurt the turning ability of the truck but a little tuning in the suspension should bring it right back. Your diff will last alot longer this way, I just rebuilt mine yesterday as a matter of fact. Must have had 20 hours on the sucker, all with pretty high output motors (feigao 8s, 7s, 380C 8t and lehner 4200, on 3s and 2s lipo).
chilledoutuk
04-14-2006, 05:52 PM
thats funny i just rebuilt my mf1 diff and did just what you said exactly.
i cranked the diff tight as a ducks butt and set the slipper to slip slightly only when under a lot of strain.
I must however say that the xxx design which has a less capacity for dissipating motor heat as it has a motor cage thats a seperate plastic part and not part of the motor mount like in the old xx cars.
One thing i have noticed is that losi use very small diff balls i mean my schumacher axis 2 uses balls over twice the size and i think this must have a big effect on the amount of power a diff can take and stay smooth.
Does the associated b4 and t4 use bigger Diff balls?
Get the 5.5 or 6.5 motor. Too much power, just cut the throttle percentage back. Some guys cut the 5.5 back as much as 50% to tame it down, but if they need more power they just turn it back up!
Interesting idea. Sorry if this is a stupid question but would a 6.5 with the throttle limited perform like a 7.5? What about the torque curve?
billmck
04-26-2006, 10:00 PM
Interesting idea. Sorry if this is a stupid question but would a 6.5 with the throttle limited perform like a 7.5? What about the torque curve?
turning down the end-point on your radio and regearing 1 maybe 2 teeth will result in similar power between the 6.5 and 7.5 motors . if you don't regear, the 6.5 will have more power, but run out of motor quicker. when you restrict your endpoint on the throttle, you cut the total power available, and get speed back by regearing, and create more heat. for racers,this can be benificial when the track is high traction on friday night, and low traction on sunday afternoon. otherwise, just get the motor that suits your needs. or do what i did, and have 2 of the same vehicles with different motors. one for racing and one for bashing. hope this helps out some...
bill
Yes it does help, thanks.