I prefer the HS85MG, it seems to center a little better than the 81.

Yeah, they are a little slower but a lot better than the 81.

I personally use a mini digital servo in my car.

I haven't checked out what servo I'm gonna get yet, and I'll probably go with the full size quantum as suggested. As for the batteries, I was looking at the URC KAN cells for $1.20. Probably gonna get a few packs. I'm planning on running the packs side by side. I just don't know what to use to join the cells. Intel, what do you use for a battery bar? I've got the wires and I'll have to pick up some more deans plugs.

Oh JB, I have a brand new Hitec HS-85MG servo that will mount into your XRAY perfectly.

As far as battery bars I use copper braided wire. United RC has do it yourself packs with all of the necessary goods. Or you can have them build the packs for you. The quality is superb.

OK. How much do you want for the servo? And where on the urc site are the do it yourself packs? I've seen them before but i couldn't find them the last time I looked.

Servo $25?

The DIY packs you can find Here (http://urc.planetrocke.com/store/subCategories.asp?brandName=United+RC+Combo+Packag es&categoryName=Battery+Packs&categoryID=45&brandID=16)

Thanks for the info. I'm interested in the servo.

Alright,

Send the paypal to intelligentsia@unitedrc.com

If you need any setup tips for particular tracke let me know.

Thanks

Could I just pay you for it next time I see you at a track? I would think that would be easier. I might try to make it out to RC heat this weekend to check it out and race 1/10.

I can't hold onto it that long. I don't even know when the next time will be that I see you.

Sorry.

no problem. Thanks anyways.

BRP racing is starting back up here in Iowa City. Id like to know how a mod M18 will do against a mod BRP on a oval carpet track?

I have a mod BRP which I hand made with T bar ,bearings etc etc. Mod slot car motor & wide rear tires to handle the power, but it never likes to run straight when I peg the throttle. Burnt 3 motors so far as well. But I usually win the class.

The rules state only that the car is " 1/18 "... So which one should I run??

Im tempted to get the M18 with a mamba or speed 300 & see. Kind of a expensive experiment though.

What do you think?

BRP racing is starting back up here in Iowa City. Id like to know how a mod M18 will do against a mod BRP on a oval carpet track?

I have a mod BRP which I hand made with T bar ,bearings etc etc. Mod slot car motor & wide rear tires to handle the power, but it never likes to run straight when I peg the throttle. Burnt 3 motors so far as well. But I usually win the class.

The rules state only that the car is " 1/18 "... So which one should I run??

Im tempted to get the M18 with a mamba or speed 300 & see. Kind of a expensive experiment though.

What do you think?

I would try the new V2 conversion for your BRP. The conversion has a new T-Plate that can handel the power. I would also pick up the speed 300 rear pod plate for the BRP.....

The higher output motors can cause the diff to slip and provide more power to one wheel can account for the difference in full power on throttle tracking.

Check that your rear pod is square to the front tires. Pull the wheels and measure from the centerline on the front axles straight from front to rear on both sides, and in a X pattern. The rear axle measurement point will have to be a prescribed measurement on the axle from the car's center as far out as you can go.

The Speed 300 6v or Great Planes 370 7.2V both require tighter diff settings than the stock motor and the greater power application can cause it to not go in a straight line when you peg it because of diff action. Too much power through the diff can generate excessive heat and cause wear so, controlling the throttle finger to not abuse the diff is better. Depends on how deep your pockets are...

Had my diff do the ticking for the first time last week, with a stock motor no less. Las year I ran a 300 with no probs.

Going to put a ball diff in the rear.

Lets get this discussion going some more. I race my M18 at Trifecta Hobbies in Prince Frederick MD and Dougs Hobbies in Hollywood MD. I have the Penguin P7500 chassis with the motor mounted centerline above the drive shaft with a 3 x 3 saddle pack for even weight distribution. I am using a Futaba 9102 servo, LRP Quantum ESC and a Novak XXL FM receiver. At the moment I am running both diffs with the screws in them. The car is a dream to drive and very fast.

So, has anyone put a Mamba-25 with like a CM2054 motor in with it?

I'm thinking of buying a M18 and a Mamba-25, etc... just for fun... It sound like maybe I'd have to upgrade my diffs if I do buy this?

I'm all new to the 18th stuff, and really wanting to try brushless... the M18 and a Mamba combo seemed like a pretty cheap way to get started... assuming I didn't have to buy a bunch of ohter hop ups to handle all the power...

Can you guys give me some advice? Would there be any real point to puting anything faster then the 5400Kv motor in there? They sell 6300Kv and 8000kv motors as well...

Depends on how much room you have. I seen one with the 6300 run and it was insane on our track.

The diffs are fine if you buy an extra front diff (the one with the screw) and use it instead of the pin rear diff.

Really a M18 on 6 cells and a speed 300 is very fast. The brushless makes is ballistic.

I wound up buying the 5400Kv Mamba combo, primarly because it was the only one they had at the store where I purhcased it at. After reading more about it, I think it was a good choice anyway. My understanding is that the 5400kv is about as good as any of the brush motors, but probably not too much faster.

I can set up a road course in my basment with probably a maximum of 30 foot straights, so I'm sure I don't need any more speed then the 5400kv is going to give...

As far as the screw diff... Can you modify the rear diff to take the spring and screw? or do you have to buy a whole new diff? I'm a little confused as to just how many of the parts are the same for the front and rear drive train...

The screw spring and nut are all that is different to my knowledge, however I dont think they are sold seperately. I didnt feel like putting too much effort into it and just got the whole front diff.

Howdy ho! Anyone in the eastern PA area looking for a place to race? We currently have an moderate following, but we're always looking for more...

http://www.grello.org/gallery/M18

- Chris

Dynamohum-The 5400 is an excellent choice-real fast and LOTS of torque. My friend has a 6800 and it's just too much(I think) on our 24'x15' track. Both of us are running the stock diffs front and rear on carpet. He's got rubber all around and I have foam in the rear. Outdrives, axels, everything is stock and so far, holding up. I just run a 5 cell pack with 16/42 gears and it's fast, drivable, handles well, and runs forever. This is my 3rd brushless setup(2 in 1/10 scale) and they're all great! My next one will probably be going into my BRP sc(or maybe a V2 conversion thats calling my name!)

Well I finnaly got my Mamba-25 with 5400Kv motor installed in my XRay M18... Wow... This thing is fast. I'm pretty much glad I didn't get any faster motor, as this thing is
basicly impossible to use all the power that it has with the 5400. I've got the smallest pinion that came with the kit in this thing. Timing is still set at it's default setting which is described as 'normal', 'good ballance of speed and runtime'... there is a lower
setting, and also 'race' and 'extreme' that I have not yet tried.

I haven't yet gotten to drive it on Ozite with foams and paragon, but I have had a chance to drive it on some office style carpet in a room that is about 150 feet long and 80 feet wide. Not the ideal surface, but not the worst either. At half throttle this thing will easily spin out even in a corner with about 30' radius. At full throttle the car is still accelerating when I have to let off to slow down enough to avoid hitting the wall at the other end of the room. At the speed I achived so far, the car will spin out if/when you turn the steering even a little bit. I'd estimate the speed I've achived so far at about 25MPH, perhaps a little faster... however as I've said, I don't think I've actually hit top speed yet, just don't have enough room.

I should get a chance to run this on a nice 10th scale oval track this weekend. However I suspect that there is no way I'll ever be able to use full throttle even on a nice sized ozite oval track. I don't have any foams... but even if I get some, I doubt you'd be able to drive this more then 3/4 throttle down a 60' straight and no more then half throttle through the corners...

Fun, yes for an experianced driver... Practical for anything but full out racing and/or controled fun by an experianced driver... NO... This is too fast for your average kid that is for sure, they'd have it broke into about 100 peices on the first battery charge.

I can just imagine what a BRP V2 would do with this motor/controler in it... and almost can't imagine why anyone would want or need anything any faster then the 5400Kv motor in any 18th scale car... I'm running five 1100mAh 2/3 A cells, and can
see no reason for anything more then that.

Dyno, how is the throttle response? Is it as smooth as the Novak SuperSport?

I was looking at the mamba 4300 for 18th truck.

Yes, the throttle response is very smooth, as smooth as any brushed motor I've ever had, and every bit as smooth as a Novak SS which is very smooth as well.

Interesting, I really didn't think a smooth throttle response could be achieved with a nonsensored motor.

The only thing that acted the least bit strange is when initaly attempting to move at very low throttle... I mean like 2% or less. Sometimes it would seem to hesitate just a tiny bit and/or wouldn't move at all after moving just a tiny bit. However this is so small it's not really even worth mentioning. If you pull the trigger 5% and get the thing moving, then it seems you can go down to 1 or 2% and stay rolling...

(I'm just guessing at the percentage of throttle, I do know that when the above issue was observed it was at extremely low throttle, deffintely less then 10%)

I have not experianced anything else even close to a problem with it's smoothness. It's so smooth I can easily get my M18 to drift sideways through a curve on low grip surfaces, and easily control the slide with throttle and steering control. I'm very impressed.