LOSI 8T 10S Rocket...........
 

Hey guys,

Thought I would post some pics of my new project. It is a LOSI 8T with 8B arms to help reduce drag induced by the open wheel design. It has the 8B diffs as well for more top end. I ran 83mph with it on a Mega 22/30/1E on MMM on 5S with 18/38 gearing. New setup is HV85 on 10S with a Neu 1515 2.5D and a little more gearing......all done on the LOSI brushless conversion kit!!

Here are a few more pics...

You might set a record with this. I think jzemaxx's record was 81mph with his MMT on 12s. Weve got to see a video of this thing in action.

Thanks Takedown. I was hoping it would have been a video with the pics as I was planning on running today to test the 10S setup but weather will not allow...

Man, I just cant wait to see this thing bullet down the street. Should be amazing.:yes:

wow if you dont get 95mph I would be suprised. I hope that 2.5d can handle 10s.

dirt,

On paper, the 1515 on 10S will pull about 61k rpm. It won't pull that in the car under load so I will be in the 60k max spec. I am shooting for about 50k under load. I am most worried about the ESC than anything else as I hope it will give me the amperage I need!! I know I should have used the HV110, but I got the HV85 in a deal brand new.

All in all Im wish you the best of luck with this. I expecting 90mph+.

i think I read somewhere that the 1y pulls around 60 amps at 60mph on 6s in an emaxx. so im "guessing" with the extra voltage, lower k/v motor, and a more aerodynamic truck the 85 amp esc shouldnt be a problem.

Thanks Takedown!! I appreciate it!!

dirt,

That is all relative to gearing. I am used to seeing 150-180 spikes in high speed 4S-5S setups. I am hoping the HV setup will calm it down to lower spikes but we will see...:yes:

my first thought was you be exceeding the 85 amp limit of the ESC but its a conservative rating it should be able to take more than 100 amps IMO. I like the idea of going with a higher torque/lower kv motor and getting your speed with gearing. If you only increase your battery voltage and leave everything else the same your amperage will increase

Sweet, whats the chances of a vid

very cool truck, i cant wait to see a vid too

I understand AZ. Maybe I worded that comment wrong. I have not tested this setup at all yet. I saw those numbers on other vehicles that I have done. What I meant to say is that I hope with a HV setup like this I don't see those numbers!!

Very bad weather here in Miami. It has been raining alot since Saturday night. I hope before I leave to Cali next week!!!

sick!!! and after you get done with the speed runs and such you can add a few body posts/fonrt /rear bumpers and BAM! you have the first ever losi sc8ight....

FYI: I ran the 1515 2.5d on 10s in my Ultra GTP and the motor handled it fine. The HV110 ESC handled it ok for a while, but one of the input caps literally exploded spattering the windshield with bits of goo. Only 1 of the 6 caps did that - the rest weren't even puffed. It still ran ok, but I sent it in anyway despite it will probably void the warranty being it was used out of spec. If it comes back, I can hook you up with a good price for it if interested - and it I have an extra pistix to go with it if needed.

Good luck! I am done with the speed thing. It was simply uncontrollable and wasn't very fun.

Lol.....that Car WITH THE LID OFF Looks Like A Bomb

Brian,

I thought you never got a chance to run it?? Did you get any info on it like speed, amp draw, etc. ??

:lol::lol::lol: Scary ain't it....

I could get enough room to really let it rip. I got to maybe 60 when I could get the tires to get a hold. Anything more than VERY gentle throttle broke them all loose. As it is, I totally ripped apart a tire, and damaged 3 others (repairable). No idea on amp draw, but the HV110 was barely warm until it blew that one cap (45*F outside too so that helps). I don't imaging the amp draw was high since I could hardly touch the throttle. :diablo:

Sweet jesus this will be a fun video to watch!

Round 1
 

Alright guys. Just got back from running the truck. Unfortunately, I had problems.... It seems that the center diff front bearing carrier broke down which caused the spur to shift and get completely chewed up!! On a good note, that was it so I will be visiting the local shop to pick up the parts to run it again Wednesday night. The truck looks very promising as I when I pulled it out to take it to the end of the street to line it up it clocked 71mph in 100 foot stretch!! I have video but I think I am going to wait to add it with Wednesdays' vid and edit it all. I will keep you guys posted!!:yes:

Awesome man! I too am looking forward to seeing video!

love the setup. cant wait to see the vid.

wow, the suspense

Alright. I got the car back together again. The bearing carrier failed and caused the bearing to fail as well. Everything has been replaced and I installed the upgraded aluminum carrier so I think I should be in good shape for tomorrow night.

Speedracer,

Where do you run? I am in Ft. Lauderdale and would like to bring my speed projects out for testing..

WOW 71 mph in a hundred feet! thats impressive considering my 30oz 6s dragster hits 104mph in 132". must be getting crazy traction. cant wait to see a vid.

killajb,

We are running in different areas. Either at FIU on 8street in Miami on Wednesdays or 12th ave in Carol City on Wednesday nights and Sundays after 3pm. We will be at 12 ave tonight as the street is much longer and wider than FIU. In all honesty, I do not think I will run at FIU with this car as the calculated speed based on previous testing for this car won't allow me to run it there.....

You should definately go out as you will see alot of different vehicles!! I will PM my number so you can call me if you have any other questions.

Luis

I was on HPI rubber Phaltlines. Foamy's are not allowed per the rules. The foam's I would have gone WAY faster. Problem is I ran into the limit of the tires....not the truck.

Yes, the Phaltlines are no good for anything above 75-80. I put a set of new ones at 76 and they ripped off in 2 passes!! I heard IMEX is coming out with a MT foam tire similiar to what JACO made for the Tmaxxs a few years ago...

Round 2
 

Good Morning Guys,

DISASTER!!! The motor I purchased was apparently no good!! I had purchased a used motor from someone on another forum and it seems to have had problems. Before I left my house I ran the truck with the wheels off the ground on 5S for about 5 minutes pulling throttle on/off at about 1/8-1/4 throttle. I noticed the motor got to about 170ish with no load! I assumed it may have been because of no load on the motor. Well...............

got to the spot, prepped the truck and was able to run it for about 10 seconds. It took off from where I was fine. I made one pass at about 1/4 throttle to make sure everything sounded ok and it did. Brought it back to line it up again and when it got to the end to turn it back around it wouldn't move!!! When I got it back to the table you could smell the heat coming from the motor and it temped at about 220 at that point! I am going to try to contact Neu and see what they say as well as the guy who sold it to me as it was supposed to be an "almost new" motor.......

OH WELL :neutral: I think I am going to try a Medusa until I sort this out so this will be out of commision for a little while.............:no:

Ewww. Sorry to hear about your bad luck. It's getting so used brushless is about as much of a gamble as used nitro nowadays. =/

I agree.. A few weeks ago I purchased a used Lehner with supposedly "10 hrs" of runtime on it. Well, when the motor arrived one of the bullet connectors fell off after I removed the heatshrink! I was changing the bullets anyway to match my ESC, but that was a sure sign of foul play. In addition, the leads were all discolored and when I finally attempted to run it, the thing smoked~

I purshased my 1515 2.5D new and it's flawless. I purchased a 1515 2D new from TeknoRC and first ran it with 6S and an 18-tooth pinion on my Hyper 8. I only ran down the street, turned around and hauled back but the motor was getting pretty warm so I shut it off. I've since switched to 4S and a 14-tooth pinion, perfect temps and ideal for track use anyway.

I don't think I'll ever buy a used brushless motor again for fear that someone else will just ignore caution and beat the crap out of it.

VIDEO!?? where is the video ??? :neutral: :lol:

P.S.
Looks like a great project..:wink:

I agree, no more used stuff!! I am pretty picky about my stuff and I would feel bad if I was on the other end! I have spoken to a few companys already about the situation and they all seem to be on the same page that something happened to the motor before I got it. It seems that the a magnet came loose and rubbed against the can.

Oh well, I already spoke to Medusa and I am going to throw in a 80mm 1600kv when they come in.

So you dont think that running the motor at its rpm limit and haveing the Center dif gears get chewed up when the dif bearing failed could have put any stress on the motor bearings? Seems pretty coincidental to me that the motor failed the next time you ran it. I wouldn't blame the guy you bought it from or the motor itself. Anything will break if you push it to its rpm limit and then add additional stress of chewing up gears. Thats the price you pay for pushing things to their bleeding edge IMO. You would have probably ruined a brand new motor doing that too.

j,

I understand what you mean but here is the thing. I have confirmed with both Medusa and Neu on my situation yesterday. Both of them stated that the setup was not the problem. I am not pushing the motor to it's "limit". The motor is rated at 60k continuous use max, not it's absolute max. On paper, the setup pushes slightly over 60k, but in the truck it will only about 45-50 so I am in no danger as far as that is concerned. The fact when I tested the motor with the wheels off the ground I was getting high heat already. Funny thing is that I got 2 different answers on that. Medusa said it was possible that the motor would get to those temps in that scenario. Neu told me that that was happening because a magnet was already rubbing in the can due to something from before. They both did say that it seems that the motor failed due to a magnet or magnets becoming loose and rubbing internally which caused the failure once it tried to pull the weight of the truck. Lastly, the center diff gears don't exist in this truck....In other words, this truck has a custom solid spool that uses a plastic spur gear on it...that is it! If you are picturing a bunch of chewed up metal, that is not what happened. If it was, we wouldn't be having this conversation!!