AznBash3r

My Feedback: (1)

starter boxes are the best thing you could use. thats why racers have em. REAL racers . pull starts are a pain most of the time, and roto starts you will still have to carry it around. with a bump box, you can start all of your cars with one starter box. plus bump start backplates create less drag to the engine, really livening up your engine (you may not feel the difference at all, but the engine will thank you. and with pullstarts you have to worry about broken strings. roto starts, you only have to worry about the battery, which lasts a long time. i think roto is for sure better than pull start, and bump is better than all, if you have the money. the only reason why i was sitting in the park trying to start my car with a roto was because the engine was tuned horribly. now the engine starts like a breeze i might get an ofna starter box for my turmoil and Rush. time will tell


check this out http://www.chitownrc.com/showthread.php?t=4712

Bhouse3000

well, can anyone tell me if that one ofna roto start, with a backplate made for ofna, picco, and xtm .21-.28 will work with my 457??? i think it will, it has the same dimensions as the stock backplate, and i hate the pull start, mine gives me blisters, yumm, hhaaha

BAMF90

My Feedback: (1)

Just don't use rotostart, you will regret it. It spins the one way bearing sooo fast that it kills it. When an engine doesn't have a rotostart there to begin with, it's not meant to be put on.

ssj2

I wouldn't use the XTM Sure Start either (if you were thinking of that), because you'll run into the same problem with the roto start. However, I'm not too sure about the Tiger Drive, I've never tried it, but IMO I would stay with a pull start. Unless you have the money for a starter box, along with the memory of charging it, then go for it. An XTM 1/8 starter box should work.

AznBash3r

My Feedback: (1)

ofna chrome top is the wtg. roto start rocks. never had blisters from it

Bhouse3000

lol, i'll juz get extra one way bearings, because i run electric alot, and i have many 7.2v battery packs, and i'd juz use that with the roto start, and i can get one rele cheap, never used, $5 just to be exact, lol, from this one hobby store, it was hopened, and the actual shaft used, but backplate, and such, still in packaging so i'll juz try that out, cuz blisters suk, haha.

ssj2

BAMF already said this, but I guess I have to advise against getting a roto start too. If an engine didn't come equipped with a roto start, then I don't recommend buying one because I had all kinds of problems with my roto start on the 24.7. I just don't see how it could be good use of time tending to a roto start and chewed OWB's. Once you get the truck tuned the PS's are really great, I'm honest, I don't get blisters anymore. But it's your truck so I guess you can do whatever you want, I advise against a roto start but suit yourself. Good luck!

AznBash3r

My Feedback: (1)

5 bucks if i used my sportwerks starter on the xtm (which i highly doubt will fit, sportwerks is too good) it will start like a charm. reason why your hpi roto start didnt work is because the motor had too much torque for the weak engine and engine quality. savage owners dont have this problem, because the motor is made from hpi, a trusted brand of engines. you shouldve used a 5 cell pack for the rotor start then lol. i even used a 2 cell lipo pack on my sportwerks starter and the engine started even faster. i think its just sportwerks



PPPPPPPPIIIIIIIAAAAAAAAA!!

BAMF90

My Feedback: (1)

Well, you can use a rotostart, but don't get the HPI one. It has too much torque, and is only good on the HPI vehicles. Also, do not use a battery with more than 2000mAh if you do plan on using rotostart. If you use a higher than 2000mAh battery, it will give the same amount of power consistantly, which is what will kill the OWB. If you can, get the Ofna one. But stay away from HPI. The XTM surestart might be good since XTM themselves came out with it, and if you have problems, just call XTM, and let them know about your problems. Good luck.

Edit: AznBasher copied me!!!

AznBash3r

My Feedback: (1)

nooooooooooooooo freshman.... mah has nothing to do with the power or efficiency of the motor. you could use a 10000000mah pack and it still wouldnt matter as long as its 7.2v, its just that the battery pack would be bigger than your car lol.

AznBash3r

My Feedback: (1)

copy cat. steven my truggy can wheelie.. whooaaaaaaaaaaaaaa

BAMF90

My Feedback: (1)

SERIOUSLY?!?!?! You got it to wheelie??? I gotta see this today when we go to run.

I remember seeing the little wheelies when hitting the edge of the grass, but real wheelies??? WOW!!!

AznBash3r

My Feedback: (1)

unofrtunaetly, the silicone i put in the center diff sstill turns over the gears. theres a super limited turn on the differential, good enough to preotect my gears .

Bhouse3000

well,l i finally fixed my mammoth st, got new fuel lines, got new LONGER pull start rope, got new glow starter, and glow plugs, and leme tell you, i tuned this really good, and now it starts in 1 pull!!! most of the time, and tahts after 2primer pulls, i love it, im running more lean than rich, and it flys, but im getting alot more of the "gear skipping" noise, is this ok??? not a single gear on the spur, or pinion are stripped or look stripped, what exactly is making that noise?

BAMF90

My Feedback: (1)

The differentials are making the noise. You have to shim them properly or see if any 1/8 buggy style differentials fit to solve this problem. If nothing seems to be wrong after a day of running, then you should be fine and just not pay attention to it.

Bhouse3000

they make a lot of noise now, how would i go about shimming them properly??? can someone please run me through the steps, mayb an exploded view, or an ms paint drawing (LOL yeah, i do it alot, lol)

ssj2

If you're looking for an exploded view, that would be found in the manual that came with the truck. I've used it a couple of times, and it helped me out.

Bhouse3000

well, how do i shim it?

ssj2

I meant to say that I wasn't sure how in my last post, sorry about that. BAMF will probably know how to shim it, he knows a little more than I do. BAMF answer this guy!

AznBash3r

My Feedback: (1)

all you do is buy shims and put it on the diff shaft....

BAMF90

My Feedback: (1)

Yup, AznBash3r is right. All you do is put shims on the diff shaft.

Bhouse3000

any links to specific types of shims, or what size, i really dont know what im supposed to buy, lol

dittch

buy the shim kit from hobbypeople for $2.50: http://www.hobbypeople.net/gallery/148624.asp

You put the shims on the pinion gear going into the differential. They force it closer to the ring gear on the diff. I'd add 1 at a time and put it back together to see if there is any play. If you put in too many it will turn very tight. Mine took 3 in the front and 2 in the rear to mesh properly. I've heard some taking up to 6 shims. It's very easy to do.

Bhouse3000

Thanx alot man, this really helps

So Cal

I have an x-cellerator and love it. (hence my name) And am looking to buy a mammoth st. Why is the centerd diff a neccicary item? ALso how much of a beating can it take without the chassis braces...(doesent it already come with chassis braces?) And what elce shoud i get? (I read the first four pages of the thread and those where the only things i saw)

thanx
-Aaron