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-   -   I wanna go 75-100mph!!?? (https://www.rc-monster.com/forum/showthread.php?t=29428)

mac3194 02.26.2011 04:33 PM

I wanna go 75-100mph!!??
 
Like the title says i wanna go fast! lol and i want to know what vehicle i should purchase in order to go that fast with it being only a mild challenge to achieve those speeds and it not being super expensive???!

DrKnow65 02.26.2011 04:50 PM

Nitro TC3, convert it to brushless, slap in a MMM with a 2200kv motor, run it on 6S. Top it off with a aerodynamic body and have at it.

mac3194 02.26.2011 05:10 PM

ok ill add that to my list what kind of speeds willl i be hitting?? and who makes a conversion kit for it??

mac3194 02.26.2011 05:15 PM

or do u think i would be better of with this system: http://www3.towerhobbies.com/cgi-bin...&I=LXAETU&P=SM on 6s with an electric TC3

ANGRY-ALIEN 02.26.2011 05:54 PM

I don't think you need 6s to go that fast with a TC3... see the link on the TC4 below... a Mamba Max (MM Pro should be even better) and 7700 kv motor will get you there on 4s or less depending on gearing...

From ejepeje:

Brushless TC4

Mamba Max 7700 motor setup
DesirePower 2S+2S 3700mAh 25C LiPo batteries

[YOUTUBE]46ssLpgky5E[/YOUTUBE] [YOUTUBE]G7CYGViimAQ&feature=mfu_in_order&list=UL[/YOUTUBE]


Alien

lincpimp 02.26.2011 06:46 PM

I would go with an ofna ultra gtp and a mmm/2200 system. I do not think that you would need 6s, maybe go with 5s. Being 8th scale the car will hadle road imperfections better, and it a much tougher vehicle that a 10th scale touring car.

simplechamp 02.26.2011 07:45 PM

I agree. Besides the GTP there is the DM-1 Spec, or the Inferno GT2. Or it isn't very difficult to convert a 1/8 buggy over to on-road either. There are plenty of 1/8 on-road belted tires available that will withstand 100+ mph.

Semi Pro 02.26.2011 08:03 PM

dont forget the losi l8ight

emaxxnitro 02.26.2011 08:35 PM

I used ofna foams to get my mbx5 over 90 with a mmm2650 on 6s
1 tip from experience at speed. the most important thing to have is a good strong and true steering servo.

mac3194 02.26.2011 08:43 PM

well tc4 rollers are pretty cheap and brushless systems for 1/10 are too. isnt the 7700 on 4s way over 100000RPM??? i was thinking a 5700 on 4s or maybe 5s??

simplechamp 02.26.2011 08:48 PM

http://www.scriptasylum.com/rc_speed/top_speed.html

Use this and play around with different voltages, gearing, etc. Remember though, once you start pushing past 50+ mph the calculator won't be as accurate, since air resistance and friction become much more of a factor. It might only take a 50W increase to accelerate from 10mph to 20mph, but to accelerate from 60mph to 70mph it might take 250W. Both increases are 10mph, but the one at higher speed takes 5x as much power. I just made those numbers up as an example so they aren't accurate, but the principles hold true.

EDIT: If you are going to go for the 1/10 scale make sure you have a very smooth strip of road to run on. As seen in the videos you can get a 1/10 going that fast, but like Linc said the 1/8 will be more forgiving to any imperfections in the road, and the 1/8 metal-gear drivetrain is more robust.

mac3194 02.26.2011 08:57 PM

ok thanks SC, ive narrowed it down to a tc4 or an 1/8th car/buggy. can i use a mmp on 1/8th car/buggy??

ANGRY-ALIEN 02.26.2011 09:02 PM

The MM pro will handle a 1/8 with no issues...

mac3194 02.26.2011 09:18 PM

cool thanks if i was to go 1/8th i would use a mmp and this motor: http://www.hobbypartz.com/96m802-4074-2150kv.html since im on a budget...

anybody wanna buy a stampede vxl?? lol

emaxxnitro 02.26.2011 10:52 PM

Rpms you will be reaching at 100mph will very stressful on that rotor. i wonder how its going to last

lincpimp 02.26.2011 11:46 PM

I would like to see a good hard test of one of those tacon/leopard motors.

I would stick with the MMM if you plan to gear a heavier 1/8 car for high speeds. Amp draw will be high. Nothing against the mmpro, but I know the MMM can handle it. And there is not much of a price difference.

Or if you want to go cheap, try one of the new trackstar escs from HC. I would lovwe to know how that esc will hold up and you can be the guinea pig!!! Oink!!

I did 73mph (and it would have gone 80 if I had a larger area to test in) with a tamiya tt01 (100 bucks for the kit), lola style 200mm nitro body (no wheel cutouts), and a feigao 380c motor on 3s lipo with a MM. I have a feeling the sidewinder sc system on 3s with the right gearing will easily get a 10th tc over 75. So you can score a tc for 50-75 bucks, around 100 for the sc system, 50 for a lipo (turnigy/zippy 3s 40c) and figure around 50-100 for tires, body, etc. So 250-300 there.

I would rather spend the extra and have an 1/8 setup. You can always gear it down and play in a parking lot when you get tired of top speed runs.

mac3194 02.27.2011 12:24 AM

Quote:

Originally Posted by lincpimp (Post 399321)
I would like to see a good hard test of one of those tacon/leopard motors.

I would stick with the MMM if you plan to gear a heavier 1/8 car for high speeds. Amp draw will be high. Nothing against the mmpro, but I know the MMM can handle it. And there is not much of a price difference.

Or if you want to go cheap, try one of the new trackstar escs from HC. I would lovwe to know how that esc will hold up and you can be the guinea pig!!! Oink!!

I did 73mph (and it would have gone 80 if I had a larger area to test in) with a tamiya tt01 (100 bucks for the kit), lola style 200mm nitro body (no wheel cutouts), and a feigao 380c motor on 3s lipo with a MM. I have a feeling the sidewinder sc system on 3s with the right gearing will easily get a 10th tc over 75. So you can score a tc for 50-75 bucks, around 100 for the sc system, 50 for a lipo (turnigy/zippy 3s 40c) and figure around 50-100 for tires, body, etc. So 250-300 there.

I would rather spend the extra and have an 1/8 setup. You can always gear it down and play in a parking lot when you get tired of top speed runs.

how about this linc if u buy my stampede vxl ill get an 1/8th scale with a MMM :lol:

if i get an 1/8th scale it will prob be a buggy so it can have more than one purpose...

bigbadtaz 02.27.2011 12:43 AM

i think you should go with a 8th scale conversion for super fast......i have a power racing Xr 8 with a a MMM 2650 hobbywing 150 esc Xerun ( i like it because it has a lcd programmer) also running 2 Gen Ace 5000 40c pack a 25 pinon and 42 spur gear. my buddy has hit a 101 mph with a similar setup....my setup is my winter setup i have not a had a chance to test the new setup yet..

el tomaso 02.27.2011 12:56 AM

The people I've seen do 100mph here did it with buggy's, the MMM and 2650kv combo, 6s and GRP tires. Just an observation.

Thomas G

mac3194 02.27.2011 01:05 AM

yea im lookin at a hyper 7 or an Ofna LX-1E

lincpimp 02.27.2011 02:25 AM

Quote:

Originally Posted by mac3194 (Post 399333)
yea im lookin at a hyper 7 or an Ofna LX-1E

Both are good choices. I recently had a look at the lx1e and the gtp2e. I really like on road cars so the gtp2e would be my choice. I have owned all 3, and the hyper7 was a nice buggy. If I went with a buggy it would be another hyper8, I really liked that one.

mac3194 02.27.2011 03:12 AM

I like the lx1e because its already converted from the factory. Hopefully its durable

alport 02.27.2011 04:12 AM

MMP will handle 1/8 but not for speed runs! If you want more than 75mph on a 1/8 scale MMP won't handle it. You can try a Xerun 150 amp if low on budget.

proffesso 02.27.2011 11:42 AM

what about the hardcore onroad cars like the MRX-4/5 / Serpent 966 etc? I thought these (and I was planning on converting one) would be the way to go for handling / speed.

mac3194 02.27.2011 01:30 PM

I think im just gonna go with an ofna lx1e but my question is should I get THE MMM 2200kv or the 2650kv??!

emaxxnitro 02.27.2011 02:16 PM

Quote:

Originally Posted by mac3194 (Post 399374)
I think im just gonna go with an ofna lx1e but my question is should I get THE MMM 2200kv or the 2650kv??!

2650 for sure.

lincpimp 02.27.2011 03:01 PM

Quote:

Originally Posted by mac3194 (Post 399374)
I think im just gonna go with an ofna lx1e but my question is should I get THE MMM 2200kv or the 2650kv??!

Still plan on running 6s? I would go with the 2200 if so. I prefer the longer motor as it will have more torque and handle the load better.

mac3194 02.27.2011 05:10 PM

do u think the 2200 would be able to reach the same speed as 2650 since it can be geared higher??!!

lincpimp 02.27.2011 05:23 PM

Quote:

Originally Posted by mac3194 (Post 399394)
do u think the 2200 would be able to reach the same speed as 2650 since it can be geared higher??!!

Well, the 2200 is a larger motor so it is capable of more total output. So if you can load it to realize that it will be able to run the car faster. Plus with the same load the 2200 should run cooler (ie both geared for the same speed).

Only benifit I can see with the 2650 is you will get a faster turning motor on the same voltage, and you may run out of gearing options. However, with the speed you are planning I do not see that as an issue. Plus the 2200 is more versatile, you can put it in just about anything.

mac3194 02.27.2011 05:34 PM

Quote:

Originally Posted by lincpimp (Post 399395)
Well, the 2200 is a larger motor so it is capable of more total output. So if you can load it to realize that it will be able to run the car faster. Plus with the same load the 2200 should run cooler (ie both geared for the same speed).

Only benifit I can see with the 2650 is you will get a faster turning motor on the same voltage, and you may run out of gearing options. However, with the speed you are planning I do not see that as an issue. Plus the 2200 is more versatile, you can put it in just about anything.

yea thats what i was thinking because if i got an MT i could just drop the motor in there.
Thanks for all ur help now i just got to sell this stampede :whistle:

simplechamp 02.27.2011 09:45 PM

Do you plan on ever running off-road with the LX1e? Or will it be on-road only?

If you think you might want to do some off-road racing or bashing then go for the LX1e, but if on-road is where you want to be all the time then the GTP2e is really a more ideal vehicle. Both are electric-ready right out of the box.

mac3194 02.27.2011 11:12 PM

Yea im always gonna be an offroad basher so I think a buggy is the most versatile...

Overdriven 02.27.2011 11:50 PM

I have an LX1e and I think its quite a capable buggy both on road and off. It has a little more bump steer through the suspension travel than I'd like, but mine is also raised up as much as possible. Once it sags to ride height or you lower it down a bit, its not an issue. The GTP's pivot ball suspension is probably a little better in the corners, but for straight line I doubt you'd notice much difference. I've found it durable too. I broke a front hub carrier and steering bellcrank, which I attribute mostly to the 20 degree weather and 35+ mph impact speed.

Don't you have (or had) an extended chassis Raze you were using for speed runs?

mac3194 02.28.2011 12:01 AM

Yea but I sold the raze so its just a piece of metal now :/ but maybe ill do it with the lx1e later...


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