1/5 scale brushless monster conversion. tips welcomed.

[Ryu James]

so get this guys. a 1/5 scale on road was donated to me yesterday by a friend and neighbor. basically new, been driven once. so of course i have to get rid of that dirty gas motor-i will use it for my weed-wacker!!

anyway, this should be a very fun project. the chasis is perfectly suited for a conversion and will hold the batts and motor, esc perfect.

so here are the 2 options i am thinking.

1. Neu 1527 1.5D/10 cell lipo/ MGM esc Max RPM = 55,500

2. Neu 1527 2D/ 12 cell lipo/ MGM esc Max RPM = 51,060

i am actually leaning toward the 2nd setup but perhaps someone can explain:
MGM has a controller that is capable of 10 cell and 250+ amps. however, the 12 cell capable controller only handles 100 amps. why is this? and would it be sufficient? it doesnt make sense why they would have 6 cell controllers that push 300 amps but a 12 cell cap. esc with only 100 amps. please enlighten me

my current truggy and buggy both turn at about 55k rpm and do 60-70 mph depending on my gearing. i am thinking this 1/5 car will do 60 mph.

also, anyone know where to get 8mm bore pinion gears?

here are some pics of the 1/5 monster. my truggy is in the back to give an idea of the size. the pipe on this thing is huge. the disc brakes (very cool) are massive.

anyone out there converted a 1/5 before or know anyone that has? i am wondering how it turned out and what kind of setup they used. i would love any info relating to 1/5 scale covnersion if any exists.

[jhautz]

55,000+ rppm is to fast. Especially on a big motor like that. I dont know much about those weedwhacker motors that power those large sclaes, but I'll bet they hardly turn 20,000.

First think you will need is a big wallet to go with that big car....

Get a big motor & big battery and use the torque, not the rpm to get your speed. Gearing is your friend.

[transtalon]

I have a 1527 1D motor on my extended Lst2 and with a 5S it was a handful to drive but lacking the topend cause my 5S 8k maxamps seems like dying out. But I think you could only run a 6S or (7S tops) as you will go over the recommended 60,000 rpms rating of the motor. But being a road car it should be lighter than a Monster truck with big tires. My truck weights 18 lbs with full gear on it and that motor never even have problem lighting up the 4 tires
on take off.

[Ryu James]

Originally Posted by transtalon

I have a 1527 1D motor on my extended Lst2 and with a 5S it was a handful to drive but lacking the topend cause my 5S 8k maxamps seems like dying out. But I think you could only run a 6S or (7S tops) as you will go over the recommended 60,000 rpms rating of the motor. But being a road car it should be lighter than a Monster truck with big tires. My truck weights 18 lbs with full gear on it and that motor never even have problem lighting up the 4 tires
on take off.

this car weighs about 26 lbs. if i throw the 1527 1.5D with two 5 cells it will probably be in the 20-25 lb range.

your setup was good for 43,000 rpm (the 1527 1D is 2300kv) which is a good setup on a single 5 cell. however, from what i understand the lower kv motor will run cooler and be more efficient. by running the 1500 kv only one 5 cell would be 27k rpm, which is too slow for my tastes. if i double that it will be in a more acceptable range of about 54k rpm. so i would still be below the 60k rpm limit.

check this out: http://www.impaktrc.com/product_info...oducts_id=3076

I would love to see your LST2 though. have any pics? how does the 1527 fit?

[Ryu James]

Originally Posted by jhautz

55,000+ rppm is to fast. Especially on a big motor like that. I dont know much about those weedwhacker motors that power those large sclaes, but I'll bet they hardly turn 20,000.

First think you will need is a big wallet to go with that big car....

Get a big motor & big battery and use the torque, not the rpm to get your speed. Gearing is your friend.

Have you done any conversions with Neu motors? have you converted any 1/5 scale cars/trucks? what setups do you run?

[Tempted]

I'll give you double what you paid for it......

[jhautz]

Yes. Ive run quite a few Neu motors in all kinds of vehicals. No I havent done any 1/5th scales becasuse I never wanted to invest to kind of money it would take to do one correctly. What you are planning will make it run, but you are likly to have all kinds of heat issues spinning a long motor that fast.

25lbs is a heavy beast of a car even for just running on pavement.

I would recomend picking a larger diameter motor with alot of torque, lower kv say 1000 and run it on the 8s you were planning. Then for speed use the gearing. Spinning the motor faster isnt the only way to get more speed.

[lutach]

Go with a 2215/2Y and 10S lipos. As for ESC, any good 10-12 (Even 15S) esc can do the trick. If you're going to stick with the mechanical brakes, you can get away with airplane esc. I have a Jeti Spin200 for sale if you're interested. They work great with pistol grip radios and all you need is the program box for it. You'll still be faster than the gas version and you'll have a more efficient running set up. One other member in the forum converted an HPI Baja and there will be another member doing one as well.

[Ryu James]

Originally Posted by lutach

Go with a 2215/2Y and 10S lipos. As for ESC, any good 10-12 (Even 15S) esc can do the trick. If you're going to stick with the mechanical brakes, you can get away with airplane esc. I have a Jeti Spin200 for sale if you're interested. They work great with pistol grip radios and all you need is the program box for it. You'll still be faster than the gas version and you'll have a more efficient running set up. One other member in the forum converted an HPI Baja and there will be another member doing one as well.

my local hobby store has the new HPI Baja 5T and i am thinking about converting it. the chassis is perfect for holding two batteries on each side like the new ERevo. i think it would be awesome. plus the Baja 5 has tons of upgrade parts avail on the market. it could be a real sweet setup. how does the converted Baja 5B do? have you seen it run? any pics?

[lutach]

Originally Posted by Ryu James

my local hobby store has the new HPI Baja 5T and i am thinking about converting it. the chassis is perfect for holding two batteries on each side like the new ERevo. i think it would be awesome. plus the Baja 5 has tons of upgrade parts avail on the market. it could be a real sweet setup. how does the converted Baja 5B do? have you seen it run? any pics?

http://www.rc-monster.com/forum/show...hlight=baja+5b

[JThiessen]

Originally Posted by Ryu James

my local hobby store has the new HPI Baja 5T and i am thinking about converting it. the chassis is perfect for holding two batteries on each side like the new ERevo. i think it would be awesome. plus the Baja 5 has tons of upgrade parts avail on the market. it could be a real sweet setup. how does the converted Baja 5B do? have you seen it run? any pics?

I thought the same thing when I was looking at it today. But those side trays are removable, and kinda flimsy. That area is going to take some beefing up.
Its one heavy monster....

Originally Posted by lutach

Go with a 2215/2Y and 10S lipos. As for ESC, any good 10-12 (Even 15S) esc can do the trick. If you're going to stick with the mechanical brakes, you can get away with airplane esc. I have a Jeti Spin200 for sale if you're interested. They work great with pistol grip radios and all you need is the program box for it. You'll still be faster than the gas version and you'll have a more efficient running set up. One other member in the forum converted an HPI Baja and there will be another member doing one as well.

What kind of horse power would the 2215 / 2y make on say 8-10...I only ask cause thats what mike is putting in my baja right now.

[lutach]

Originally Posted by coolrunnings

What kind of horse power would the 2215 / 2y make on say 8-10...I only ask cause thats what mike is putting in my baja right now.

I would say max about 5HP giving your set up gives you 100A at 37V. That is just a conservative estimate. I had my BPP truggy on 10S lipos with the 1521/1Y put out 4760 watts which is just over 6HP, but it was just too much for the diffs. If you gear your Baja right, you can see less HP, but longer run time and cooler everything .

[Ryu James]

Originally Posted by jhautz

Yes. Ive run quite a few Neu motors in all kinds of vehicals. No I havent done any 1/5th scales becasuse I never wanted to invest to kind of money it would take to do one correctly. What you are planning will make it run, but you are likly to have all kinds of heat issues spinning a long motor that fast.

25lbs is a heavy beast of a car even for just running on pavement.

I would recomend picking a larger diameter motor with alot of torque, lower kv say 1000 and run it on the 8s you were planning. Then for speed use the gearing. Spinning the motor faster isnt the only way to get more speed.

thanks for the tips. sounds good. any specific motor recomendations? what does Neu make that would fit into the category you think would be best?

[Ryu James]

Originally Posted by Tempted

I'll give you double what you paid for it......

Double what i paid for what? the 1/5 car as it is? or the finished brushless project?