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RE: Magnum NX - 11/24/2006 9:43:03 PM   
cujoman


 

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From: mississauga, ON, CANADA
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i own a magnum nx and i have to tell you, i am not at all inpressed with it or cen's customer service. Modestone, i believer you had a problem with the radio, right? i did too. from day one it took off on my like a bat out of hell, crashing into a tree and twisting both my rear dogbone shafts... i called cen, the first answering machine, left a message for Eric to call me back...no call...second time, finally talk to one of them...they said, send us the truck back and we'll look at it ...well for $75 i rather just buy a new receiver/radio and crystals for $30 on ebay. I tried my jato crystals and radio on it...and it worked beautifully. next, is the rear axle...they keep breaking like candy canes... just from driving it in the street and in the park...didn't even jump the thing, so far it has been one a day!...so try this guys...before you install the new ones on, heat them up with a plumber torch and let it all get nice and red, then let them cool on it own...maybe it will work better and not break! i think that in taiwan, where they make this parts they are heating them up and cooling them in water or iol which makes the steel hard brittle...so they are no good. overall the only thing i like rally like about this truck is the motor and tranny...everything else seems to be made badly... was not really worth the $300 u.s. i paid! as far as customer service keep calling them as long as you have a waranty still available...mine ran out and i email them about just sending them back the receiver and crystals, cuz it would be cheaper and till this day, i have not heard from them... they should really have a 1 800 #...it gets costly calling them long distance.
good luck with you cen truck!

(in reply to alvinl)
       Post #: 26

RE: Magnum NX - 11/24/2006 11:54:29 PM   
azzman



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The problem with them is they are a little on the weak side, and maybe your batch is too brittle.
I found with my MT2 that after I did the the diff cup mod that the next weak spot was the axles, they would either twist or snap.
Sometimes this is caused by them getting caught in the diff cup if there is too much sideways play in the dogbone. Try putting a rubber o-ring or thin slice of fuel tubing in the cups at each end of the dogbone and adjust the hubs so that at a horizontal dogbone position in the suspention range there is little or no sideways play, this will help them last longer.
You may find that if you heat them up and air cool them you take away the temper of the steel and they may bend easily.

That is really the reason why a few of us have done the TMaxx axle mod which basically cures that problem. But it also means you cant fun 12mm hexes, you have to go 14mm.
I have also done a mod to a complete set of hubs that allows you use Jato shafts. I have no use for them anymore if you want to make me an offer on them and a brand new set of GPM Jato shafts...

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(in reply to cujoman)
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RE: Magnum NX - 11/25/2006 1:59:35 AM   
cujoman


 

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hey azzman, thanks for the advise...i will try putting the o=rings into the cuff and see what happens, so how did you do the t-maxx axle mod? do you have any pics? i have a set t-maxx hexes, so saves me some hassle. but wait, that would mean that i would have to put on the tmaxx tires and rims i've got...they don't really fit, unless i make some mods to the exhaust pipe and grind the chassis down to allow the front tires to turn properly... do you know of a kit that will allow me to put t-maxx 3.8 talon tires on the magnum nx without mods?
about the jato stuff you have, got any pics? i may be interested but i have to see, it's all about timing right now..going away for the month of dec.

(in reply to azzman)
       Post #: 28

RE: Magnum NX - 11/25/2006 7:59:15 AM   
modestone


 

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Well, it was not me that had the problem with the radio, but my roomate. And it did not get to take off like a bat out of hell, because we checked everything before we got to using it. He got response from the customer support the next day, and they only asked him to send in the remote, not the whole truck.

As far as durability goes, our two trucks have been astounding. I cracked the mount point on the wheel hub as stated earlyer (I ran into a curb at hard turn and medium speed, deffinatly my fault), but even cracked and a large part of it missing, it has somehow managed to stay on for two days of 4 + hours bashing each. Not just riding around, were talking jumping, doughnuts, grass, dirt, asphault, gravel, and the occasional big rock. I CANNOT BELIVE that as broken as my hub is, that it has not only stayed in tact enough for usage, but hasn't even had one pop-out! A new hub is on order, but I have been VERY pleased to be able to use my truck with the broken hub without issue.

My roomate had some of the most spectacular jumps of the day today. Litterally his magnum was 7 feet off the the ground, and traveled a good 15-20 feet, and that was the final jump in a seccession of three, that were hit many many times.

In addition to this, I have been able to observe an Acme "Aggressor" from day one, to day three, and I will tell you right now, there is a HUGE difference in quality between the CEN and the Acme. Lets just say, he has taken his out twice, has destroyed a spur gear, cracked a top rear swing arm, tweaked his chassy pretty good, had differential issues, cracked gas tank, and you want to talk about trucks taking off out of no where, WOW I have seen his do it about 7 times in a few hours, very very scary stuff.

I think most people that get the magnum and similar priced trucks are typically under-informed on propper procedures / safty / maintenence, and at the same time THINK they are spending HUGE amounts of money for it (these trucks are ENTRY LEVEL!). Which leads them to have not only many problems , but also un-realistic expectations.

I bought my Magnum knowing full and well things were going to break, probably relativly often even, not because its a Magnum, but because its a RC NITRO TRUCK!

I will also say that what I have seen the two magnums take allready, COMPLETLEY validates the purchase, and my roomate will tell you the same exact thing.

< Message edited by modestone -- 11/25/2006 8:03:10 AM >

(in reply to cujoman)
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RE: Magnum NX - 11/25/2006 8:01:50 AM   
azzman



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Bro, for one you have to use offset wheels on it if you do the TMaxx mod...and use a low profile tire. Then there will be no other modding required.
I have done a detailed tutorial on how to do the TMaxx mod...HERE
Will try and get some photos up soon, basically I had to dremmel out the material where the inner 10x5 bearing sits to accomodate a 15x10 bearing. Will take some pics.

< Message edited by azzman -- 11/25/2006 8:02:41 AM >


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(in reply to cujoman)
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RE: Magnum NX - 11/25/2006 1:26:24 PM   
cujoman


 

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interesting experience...see I know this is an entry level truck and was expecting more! I am comparing it to my Jato which i have jumped 10ft in the air on asphalt, abuse(bashed) the heck out it and nothing broke...so i am not new to the world of R/C, I've had probably about 5-6 r/c cars and trucks.... but i suppose you are right, i was expecting too much for what it is. well your roomate was lucky that cen customer support got back to him and only told him to send in his radio...see if they would have said the same to me, i would have done so right away. would have definitely been cheaper!!
as for people being under-informed, i went with the review that was given to this truck here on R/C universe. well all in all, i think i will be giving it another try as a 2wd truck and i will use the front driveshafts in the rear. they are the same length and seem to be a lil' thicker and i'll use the o-ring advise from azzman ....we'll keep you posted!

(in reply to modestone)
       Post #: 31

RE: Magnum NX - 11/25/2006 1:29:56 PM   
cujoman


 

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yeah i hear you,thanks again azzman!! good tutorial! no rush on the pics, whenever you get a chance!

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RE: Magnum NX - 11/25/2006 6:31:38 PM   
modestone


 

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From: St. George, UT, USA
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Heya,

Yea I wasn't really trying to say you were inexperianced, it just seems in general its the case.
From what you have stated, you probably have more experiance then I!

I wonder how many problematic CEN (and other manufactureres for that matter) vehichals are put together at 4:30 on a friday when all the workers want to go home.

I personally don't trust anything to be properly assemebeled at the factory. I only really trust it if I have done it myself. But at the same time, it is really nice to have the product allready assembeled, so as to learn as ya go, and still have fun.

I wanted something to break, simply to give me an excuse to rip it apart and put it back together again. Am I crazy or is that half the fun of the hobby? I like ripping things apart, seeing what makes them work, and what I can do to make them work better.

I think one of the best things about the Magnum is its a piece of cake to work on, as far as I have seen so far.

But again, I don't have much to compare it too, unless you count the Acme truck, but its in a class of its own, and not in a good way.

(in reply to cujoman)
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RE: Magnum NX - 11/26/2006 1:42:02 PM   
cujoman


 

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modestone, i know what you were trying to say...don't worry, no offense taken here! I know waht you mean about factory assembled vehicles, they can be rush jobs most of the time. I don't know about you guys but I noticed a lot of loose parts on my truck from the getgo. but it's all good now. did my first 2wd run yesterday using the front shafts on the back and guess what, nothing broke! maybe that is the way to go...performance wise, did not see much difference in speed from 4wd to 2wd....so i switch it over to 4 again. this is where you mentioned the ease of assembly of this truck, this is very true! you made a good point about ripin' it apart and put it back together and seeing where improvements can be made....now that the warranty is up on my truck, i've decided to change the fuel i am using. I am running both my Jato and Magnum with white lighting 40% nitro/ 8% oil....men, the jato just flies and it's actually getting up to operating temps faster and does not over heat! the magnum is running better too, especially on the grass!!! I think once I get a chance, i may be changing the engine to the OS .18 CV-RX...apparently it's suppose to give it a lil' more kick better and for a hundred dollars, that's not a bad experiment!

later!

(in reply to modestone)
       Post #: 34

RE: Magnum NX - 11/26/2006 4:05:52 PM   
poor judgement



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The OS .18 is a brilliant engine in these little trucks. Just be sure your diffs are in good shape, the extra power will take its toll slightly, more so on worn/poor fitting parts.

If the diffs do go pop, go for the upgraded hardened diff gears. They are "Fit and Forget" jobs.

If you can stretch to it, the OS pipes seem to work very well on the .18 too. I went for 25% nitro and OS#8 plugs. Engine has had gallons and gallons through it with no trouble at all. Takes about a gallon for full run-in though.

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(in reply to cujoman)
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RE: Magnum NX - 11/26/2006 4:49:39 PM   
cotton_eye_joe92


 

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I have the Talon NX3.0. It's about the same thing except for the wheels and the body. I love it. It's pretty durable and it's a (IMO) great start for nitro rc.

The only time I broke something was when I was going full throttle at a ramp and landed bad. The buggy cartwheeled, eventually having the wheel shaft for a wheel on the back break and send the wheel rolling. Oh yeah, my pullstart went bad, but I think I might've pulled it out too far. (I'll probably get a tiger starter system if I can't get a new pullstart.)

They're great for the price. Nice and fast.

-Joe

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RE: Magnum NX - 11/27/2006 1:30:12 AM   
cujoman


 

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thanks for letting me know about the engine, diff gears and o.s pipes.... well the truck is about 2 months old now and have barely run cuz the axles keep breaking...but now i know if the diff gears give me a problem, i know what do to...thanks! can't wait to try that lil' engine, do you think that running traxxas glow plug would be a problem? what do you think about a Mach .28 on it...saw a clip of one that had it on youtube.com and it seem to go pretty quick!

< Message edited by cujoman -- 11/27/2006 1:33:47 AM >

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RE: Magnum NX - 11/27/2006 1:35:38 AM   
cujoman


 

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From: mississauga, ON, CANADA
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i have a feeling that due to the size of the tires on the magnum and the fact that they do not have a foam insert...it also causes the axles to break....too unstable...maybe i will try my jato 2.8 rims with a set of talon tires on it...see how that works!!

(in reply to cotton_eye_joe92)
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