I get a codec error.. freaking quicktime.. The virus of apple.

Looks good!

Make sure you bring that vid cam tomorrow.:018:

Thanks!

that helped.

cool work, now get it on the road!

well today was a bust for me i spose.. didn't make it to the track (2 hours away, AND closed at 3pm)..
i got somewhat of a charge in the packs, and took it out on my street for a few minutes.. hopefully i'll have some video by monday.. i've got the 18t (i think) pinion on it, as i still have to get the 21t to fit.. bought some hardware for velcro strap loops, they rub the rear tires when off the ground, but on the ground running, it didn't seem to be a problem
speeds i'd guess were only 30-40s, but the throttle epa was at 15%, and can be set up to 125 i believe.. the packs died before i had a chance to tweak the radio at all.. also, the controller settings are still defaults.. what do you guys suggest changing to get more punch/speed, ect?

Wel you can start with getting the EPA above 15 percent...............

haha i know, i mean besides that :)

You need better batteries for that thing. Those NiCDs are not going to cut it. Lipo will make that thing RIP.

ok, so second run.. had epa at 100%, and it seemed about the same..
i guess because before at 15%, it had been programed at 15%, so it thinks it's 100%?
I also changed to race mode, because the earlier run the car would stop completely when i went too far away.. it was still well in range, just interference.
also put torque at Normal2..

speed seemed about high 40's low 50's? idk, maybe i'm underestimating myself, because it's so incredibly easy to control. 20mph 360's! :)
also, with the front one-way, it's easy to loop it w/ too much braking.. if it spins 180, and is rolling backwards, it doesn't seem like it has very much punch to spin the tires.. i have to give it like 50% throttle to get it to get it going from reverse to forward.. idk, just doesn't seem like it's all that powerful. it's a different application for me, but the car doesn't seem any faster than my old tc3 w/ lehner5300 and 8 cells?

Maybe try reprogramming the ESC with the EPA set a 100% will help?

I did that when i put the batteries back in for the 2nd run. recalibrated controller, and transmitter..
not sure what else?

How much have the batteries been used recently? In my own experience Nickel batteries tend to need to be "woken up" by running a couple of cycles before they perform best. That's one reason why I use LiPo :D.

What are these "Nickel batteries" you speak of? They sound good! :005:

http://img143.imageshack.us/img143/1103/imag0147kz2.jpg
http://img143.imageshack.us/img143/2128/imag0148uw9.jpg
http://img143.imageshack.us/img143/1733/imag0151ne3.jpg
http://img143.imageshack.us/img143/8028/imag0152vi9.jpg
http://img143.imageshack.us/img143/9669/imag0149lc0.jpg
http://img88.imageshack.us/img88/8876/imag0153ky6.jpg

You just need those lipolys and you will be set. Those cells have been prolly sitting a year +.

Yea. You should get a HUGE power increase with the LiPo's....

well, took it out for another run under parking lot lights.. i'm trying my hardest to get video.. it appears that imovie '06 isn't compatible w/ my ibook :'(
looking for an older version now.

the 2speed assembly that i'm using as a 1speed.. doesn't work anymore lol.
i had the 2 shoes tightened in the "bell" that the spurs mounted on, and the grub screw holes are stripped out in the shoes.. I bought some perma-bond stuff that's supposedly 4x as strong as super glue, and tried that, but it broke free after about 4 minutes.

I'm guessing alot of the speed loss is batteries, but also, I put the 45t spur on, along w/ the 20t pinion.. (removed the mechanical brake, because i don't have a servo for it anyways..) so I guess either epoxy the 2speed, or just get a lightweight adapter made up., then it'll be back on the road..
top speed thus far is 48.5mph according to the Garmin Etrex..

btw, is 66c/110p amps enough for this? lipo can't come soon enough, and i just want to be 100% sure.. 5s lipo will be less voltage than what i'm supposedly getting now (i know amp draw plays a factor), but i'm under 40,000 rpm.. I don't have any other gearing options, so perhaps I should be looking for a different motor? around 3000kv instead of 2000kv, would put me at 55k.. higher than you monster guys like to run, but this car is only 6lbs.. so .. ?
hmm, just noticed my 540c 9l that i've yet to use.. 3345kv will be a fun test.. not a permenant motor, but i'll give it a run or two to see where it runs mph wise. just need some female 3.5mm plugs.

Im still thinking the batteries are the main source of your speed loss.

help. what size plugs come w/ the neu motors? 5.5mm?

No plugs.. just bare wires.

hmm.. i got a set w/ my motor..

also..
low quality = http://041206.com/xr8-l.mov
high quality = http://041206.com/xr8-h.mov
(sry serum, i captured/edited/uploaded on my ibook, and don't know how to convert to anything but quicktime.. latest version should work though.)

Nice vids, I cant wait to see them with the lipolys....man, why cant the 21st come any faster?

I like the way it sounds. Looks hard to stop though! :)

BTW: For Windows users who don't have (or don't want to have) Quicktime, you can use QuickTime Alternative, which basically uses MP8 with a codec.

or.. if you want a big download (105mb).. w/ not noticably better quality.. http://041206.com/xr8-xh.avi

I've got too much bandwidth to kill haha.
it's not so hard to stop.. i'm just not used to it at all.. front one way = completely different driving style than alltime 4wd. I found some lipos that will fit, but are too wide for my battery tray.. it'll fit, but won't fit "in" the pocket. I may get another tray made sooner than i expected, but not sure.
I'm charging the packs again, and re-super glued the 2speed's shoes to the spur's "bell".. since speed isn't where I'd like to see it at the moment, I'm going to wrap some electrical tape (1 piece wide) around the center of the rear tires and try out some drifting tommorow at lunch. i'll keep you updated.

Cool!
Note to myself..


Foams lack of grip.. Things to buy; 1 litre of sticky tire compound..

More like this:

Foams lack of grip.. Things to buy; 1 GALLON of sticky tire compound..:018:

Yeah, shore 20 tires would help too...

48.5mph with these cells is rather poor, but it are the cells, no doubt.. Too bad you don't have got an eagletree..

As a refference;

in my mugen converted buggy, i reached 44.9 mph on 14 cells (gp3300's) and it was NOT geared for speed.. In fact, the motor was doing nothing, because it wasn't even near it's loaded RPM... I did the speedcalculation thing, and according to that, it should do less than 40 mph.. So i guess i can gear it a tad higher. Too bad my motorplate isn't ready for a bigger pinion.. Back to the drawing board... Again, cells are the key to the power/speed!

ok, so once again.. which cells are my best bet? that's the only step remaining on this car..
there's maxamps, truerc, and the evo-20 cells I'm looking at..

I think two TrueRC 5s2p 8000mah packs would be my best bet.. 160a/240a, and 16,000mah. that'd be about $375..

two EVO 3700mAh 5S1P packs would give me 148a/222a/370a and 7,400mah for $470

or two MaxAmps Lipoly 6000mah 5S2p.. 180a/240a, and 12,000mah for about $400


so looks like truerc's are the best bet?

Go for 2 TrueRC 5S1P 4000 mah packs...I JUST got my 3S2P packs in and they aren't light to say the least...But, definately worth the money..

so 80a/120a won't be too little? what if I decide to get a higher kv 1512, or a 1515 in the future? I'm still very cautious of over drawing the batteries.

I don't think it would be a problem...But I'm not positive...I guess it won't be though. I personally wouldn't worry about it...

That is way more battery than you need. You don't want to be hauling around that much weight if you are trying to go fast. Get the TrueRC 4000mah 5s1p packs like Squee suggested and run them parallel for 8000mah 5s2p. If you are really gonna spend that much on lipos in one shot get 2 sets of them. You can always strap them together and run them as a 16000mah pack like you wanted. But, you wont need to and then you will have 2 sets of batteries. one to run while the other is charging.


I run a 5s 8000mah setup from TrueRC in my Maxx and Revo and have never had an issue at all. As a matter of fact I can barley warm the packs up. Ive used a bunch of deferent motors also. Feigao 9XL, 8XL,9L Nue 1515 2.5D (1700kv) and one run on a 1512 2.5d (2000kv).

While you may want to run a slightly hotter motor than these in your car, but it doesn't weigh as much as my 11+ lb revo so your amp draw should still be fine.

A 8000mah setup from TrueRC will be perfect. They might not be the best cells available, but for the money they are really hard to beat. I just got a 3rd set a couple weeks ago when they came back into stock. The latest set I got are a really nice build quality. They look really nice and are put together really solid. Dan over there must have been practicing.:018:

Yup. I can say the same. I just got mine in today and they are put together GREAT!

I've got a 1512/2.5d in the car right now, so i'm glad to to know that it's a tested setup. sounds like a plan, thank's again guys.

*edit, can someone post the specs of the batteries, so i buy the right ones.. truerc's site is making me dizzy.. are you talking about these?

Custom built TrueRC 18.5V 5S1P 4000mAh IN STOCK

Size
27mm x 50mm x 145mm
(1.06in x 1.96in x 5.7in)

Weight
Aprox 15oz / 425g

Discharge
Up to 40A Continuous
60A Max burst

Price
$90 IN STOCK

?

*edit, I think I got it.

That motor is sick on 5s. I love it. I bought it for a project I am building now, but had to toss it in the revo over the weekend and give it a run. You will be able to gear that thing up and make that car of yours scream. My fat revo didn't even make it flinch.

that's a part of my problem.. i can't gear up without getting custom pinions made.. right now, everything's been running real cool, so I think it should be geared up more, but can't.. Mike did mention making custom pinions, but I don't know what size would work best. 30/45 ratio possible? i have no idea :032:

Get your new batteries first. You will be tons faster with the lipos vs those nicd batteries. get some radar of your speed with the lipos and then go to brians speed calaulator on this site and enter your gear ratios, motor info, battery info and such and see if its pretty accurate. If it is, then just pick the speed you want to go and adjust the pinion size untill you get that speed on the calulator and thats the pinion you order.

If you are going for an insane speed run you will be way overgeared but you will just have to make a run or 2 and then stop and let everything cool down. Then try it again. You cant run consistantly that way, but you can put up some insane numbers that way.

I don't think you need TWO of the 8000mah packs.... you mean total of 5s 16,000mah correct?

If so you can at least drop back to a 3p 12000mah pack. I have run that before in my truggy (4s3p 12000mah) and it holds voltage very well even at +100A spikes and hardly breaks a sweat at like 70A ballpark... that I'm guessing you will see on the track.

j, I ordered two 5s1p 4000mah truerc packs, and two 505 balancers last night.
along with a hitec 5955 servo, and some female motor plugs, from Mike.

glass, how would you go about splitting 5s3p into two even packs?..

5s ok for short periods with a 540c-9l?