Got My New Setup Running!!!
 

First let me thank everyone that gave me info and answered questions on my other posts.

I got My E-Maxx built and running finally. This is what I put in it just for backround:
Wanderer 8xl
Warrior 9920 with cooling fan
Ultimate BEC
Strobe slipper with 18/51 gears
FLM aluminum 2 speed tranny with steel idlers
UE titainium driveshafts and cups
UE 6mm steel CVDs with boots
FLM hybrid bulkheads
Ofna 6 spyder diffs
FLM aluminum chassis braces
FLM shock towers
FLM control arms
Hitec HSC-5955 steering servo
-- UE servo saver is ordered
Traxxas big bore shocks
20 IB 4200 mah cells
Revo wheels and tires
Airtronics MX-3S controller
Aluminum wheelie bar
Rubber sealed bearings everywhere

I took it out for the first time today after work. Tried it with 20/51 gearing first. Crazy insane fast!!! At 1/3 trigger pull it is way faster than a stock maxx on great 14 cell bats. Then it started cogging bad after 5-6 mins. I found the motor and controller way too hot. Changed to 18/51 gears. Performance about the same but must be gentle on the trigger or the front tires never touch the ground. When its going 15-20mph in second gear and I floor it it will pull a wheelie for around 30-40 ft. Basically untill I let off. I can't even come close to top speed by my house due to cars and curbs but tomorrow after work I'm gonna stop at the park and see what it will do. Mike said that the 20/51 would get it over 60mph so I'm hoping that the 18/51 will get around 50-55mph. My batteries lasted the whole time I was running today testing it out, about 20-25 mins and still were going strong when I decided to stop. Damn good I think.

Is thermal cogging normal with the 8xl 9920 combo if they get too hot?

Sounds Great! We need video!

I burned my 9920. I think it was do to binding. Make sure it rolls really easily and keep a close watch on the temps!

Good luck bro.

:027:

An 8XL on 20cells is pretty insane stuff. Sounds like your gonna have a lot of fun with that.

sounds nice and it sounds like you are going to have a lot of fun with it. Do you have any pics of it

I would like to see pics and video to. I want to build almost the same setup!

btw where did you get a cooling fan?

Not trying to hijack the thread here, but I run a Torpedo Chassis, 7XL, 16 IB3800 cells, UE diffs, 40series ROad Rage tire, 18/51 gearing. The batts are fresh so they may need a cycle or 2 or 3 on them but I got it radared by my friend, cop, and all it pulled was 33mph. I almost cried. I managed 37mph with a 9L on 14cells geared 14/51, but this thing is a beast compared to the 9L. I dont know whats up. I'm gonna try the same setup another time but with the another cop's radar.

Sorry to but in here.

Any pics of ya truck in progress? Are you running the stock chassis?

Something sounds wrong with that nitro starter, any binding in the drivetrain, or it could just simply be the batts need a few cycles.

*to Nitrostarter*

Yeh, sounds like either a battery problem or maybe a programming/radio issue. Have you tried reprogramming the controller? Might help if you havn't.

Those batts need a few cycles to start to wake up. Start there first - also check for binding, bearings, gear mesh etc.

on a 8xl and 20 cells I not sure I would run a 18 51 gearing. JMO
I had 20 on a 9xl and it got warm on 16 51 gearing. 9xl on 20 51 gearing thermaled my esc to.

I took it to the park today. Oh my! Did at least 50mph and I had to be gentle getting there cause it will wheelie at around 30mph if I gun it. Have to slowly roll the power on. I can easily get away with 14 cells for bashing around as 20 is just for showing off. Is it possible to have too much power??? LOL I got the cooling fan off a 540 motor heatsink by gpm I got off Ebay for $5. I Am gonna try and list a few pics I just took today after running it so it might look a bit dirty. (was raining this morning) I can take video but I don't know how or where to get it hosted. I can't send it right to this site can I?

here is some pics....I hope

some more

I use the straps to hold the 3rd battery on top of the 2 main batteries. I'm still thinking if I should go with an aluminum chassis...... Which would you guys say is a good one? I like the protection the stock one give the electronics thats why I still use it. I saw the Hardcore Racing aluminum tub chassis and it is basically the same as stock but aluminum but it is $165 and I don't feel like spending that if I don't NEED it. I want one that will protect the expensive stuff up top from water/dirt.

Get a gorilla chassis, would look better, and will probably hold 20 cells better.

Closer pics.... sorry about the small pics but it won't let me upload them unless I shrink them this small.

Nice and clean sluggie. Little tip: try moving the heatsink on the motor to the top of the can. As I'm sure you know, heat rises, meaning the top of the motor will always be hotter than the bottom. Putting the heatsink at the top will help dissipate that heat a bit more. Just my thoughts....

Otherwise nice truck! :D

Looks good sluggie!

i'm sure you will strip those wheels pretty soon though. an 8xl on 20 cells is a beast.

Nice Truck! Where can I get an esc mount like yours?

homemade.

Sluggie, how do you have your esc connected to your motor? Looks pretty clean.

Thanks everybody! Your right Serum, the wheels will go eventually. But I must say I did a few cartwheels at about 30mph and they didn't give so they might last longer than I thought. Can Mike get the UE wheels at a better price than they have listed like he does their servo saver? Bigbudd, I got the esc mount here https://ssl9.secure-svr.com/rc-solut...?iProductID=36 I put a piece of 1/2 in. thick foam tape under it esc to protect from damage and just ziptied the esc to the bracket. Johnnymaxxima, I just used 5.5mm connectors with heatshrink tubing. Clean and easy to take apart.

Links dnt work?

fixed the link

works like a charm. try to CA glue the hexes in the wheels, they will last longer.

Well I ran it again at 18/51 and i got some temp readings, 178 on the motor, 140 on the esc, 130 on the batts. Wouldnt that say that its undergeared??? I got a 16t im going to try out.

Well, since you have ue diffs, I would say its more likely to be undergeared rather than over, but still I would wait till your batts have had a few cycles.

If you drop two cells the temps would be a lot better on the motor.

Did you run it from full charge to full discharge? - Did you run it like you stole it ? that will make a difference in temps also - Plus i still refer to my previous post re: getting some cycles on those batts....

I took my truck to the park again to try and verrify if the gearing is correct since a few people said 18/51 might be too high. After running about 10 mins at allmost top speed the whole time I noticed it starting to cog so I checked the temps. Motor and esc very hot, bats warm to hot. I'm gonna throw in a 16t pinion and try and get back out today or tomorrow to see how it works on that. Does everyone think that would be a better ratio to cool things down? I was running 20 cells again. Might try 20 and 14cells with the 16t but if the temps drop to where I want them then I might just keep it on 20 cells.

14 cells would work great. could probably step up in gearing. I wonder if you may be pushing it harder than you think to. hacker says 18cells for there 8xl.

I was thinking I might switch to 18 cells. I ran it for a bit on 14 cells and it was a dog compared to 20 cells. I also started hearing clicking from the rear diff. Took it apart....diff done.....brand new Ofna 1/8 buggy diff. LOL That's power. So I just ordered an 8 spyder from UE to replace it. If that goes then I'll get a Ford 9"!!!

Hey, Sluggie that's a killer clean MT! :004: I am building basicly the same truck I did opt for the FLM ext. chassis and the gorillamaxx 1 speed trans :027: All my other parts are the exact same. I hope I have the same results as you. Just think how insane it will run on lipo's or linm's:037: I guess a good place to start my gearing will be16/51 and be prepared for killer speed:043:

Except for the diff click... you mean - right?:005:

LOL!

are you sure you had the diffs shimmed properly and you tightened the ring-gear tight?

I have never tore out a diff of the buggy in my maxx. I have stripped the teeth off a mod 1 gear to. had a few blast with 26 cells when the truck got going right. I agree with serum. Are you sure you got every right in the diff. What housing where you running?

I didn't build the diff. I got it from Mike already assembled. (Ofna 1/8 6 spyder diff) It felt shimed right before I put it in. I did notice when I pulled it apart to check what went bad that there was grease in the spyder gears instead of oil. I never tried to put oil in it since I could feel there was drag inside from lube. (assumed it was oil) That must be what caused it to fail. There was nothing wrong with the ring and pinion. But I'm not sure that the Ofna diff would put up with the abuse I was running through it if it had oil in it anyway. I'm actually starting to wonder if other people are getting the same results with a similar setup as mine. My truck is compleatly uncontrolable above 1/2 throtle. when rolling about 15-20 mph if I gun it it will flip OVER the wheelie bar! I think I'm gonna switch to 18 cells just to take some of the bite out of it and keep things cooler. Do you think the batteries are what is making the difference with making it so damn powerful? I use Ib4200s charged at 4A. I can't imagine if a Lipo can actually make more power than this, how would you put it to the ground?

I ordered the gorrilla aluminum chassis from Mike last night. I got sick of my truck flipping every time I try to turn. I have the suspension set as low as I dare with the springs set very stiff. I think the lower cg should help a bunch. Plus the truck looks unfinished with the stock chassis. I figured I pulled it all apart to do the diffs so I might as well swap the chassis.

I have ran the 20 cells ib 3800 with a lehner 1950 8t. I have simaliar problems on the flip over with the gorilla extended chassis. I have ran the ue 6 spyders on a 2250 and 26 cells which make the xl cans look weak.

hey sluggie24 do you have any video of this thing?

I didn't take video yet. I have the truck all torn down now waiting for the new chassis and diffs that will come this week. I should have it done by this weekend so I will take some more pics and find someone to take some video for me. How do I post videos on here? Can anyone tell me?