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-   -   elc. conversion project done right... with an 808 (https://www.rc-monster.com/forum/showthread.php?t=23474)

whitrzac 09.10.2009 11:01 PM

elc. conversion project done right... with an 808
 
finally picked up a "real" 1/8 buggy, a used Xray 808, just in time for next year this will probably end up being a $$ pit, but I'm going to try to keep it under control

now let the fun began

first off, I'm going for a <7lb buggy that is still grossly overpowered, and will make a 15min main. From what I’ve read the xray is the lightest buggy out there...

I have the time/equipment to make my own chassis/parts.

IDK if I want to do a single batt(everything else), duel batt(caster), or an "under the driveshaft"(
Durango) layout. any opinions?

I have an RX8 esc, but what about motor?? maybe a 1509, Novak HV(14mm rotor), or a 1412...

batt voltage??

upgrades??

no matter what I do, I will probably end up making my own chassis from 4mm CF and integrating the batt tray into the chassis(think 1/10 truck)

nitrostarter 09.10.2009 11:09 PM

Of the motors mentioned, I would use a 1412...

whitrzac 09.10.2009 11:36 PM

Quote:

Originally Posted by nitrostarter (Post 319867)
Of the motors mentioned, I would use a 1412...

why?

Bad Karma 09.11.2009 12:16 AM

Since you already have an RX8 why not get a Tekin sensored motor to match? Then since it's sensored it should be super smooth.

whitrzac 09.11.2009 08:17 AM

Quote:

Originally Posted by Bad Karma (Post 319891)
Since you already have an RX8 why not get a Tekin sensored motor to match? Then since it's sensored it should be super smooth.

wight... and there still haveing probs with the rotor

RBMike 09.11.2009 12:32 PM

I got my MBX6 down to 7 lbs, 4oz. The X-ray is a little lighter stock so you should be able to do it. I have a Tekin ESC & 1400 motor run off of a 6S 2600mAh Hyperion G3 (405 grams). Losi battery tray (lightened & modified). Some aluminium axles & ty screws.

whitrzac 09.11.2009 12:44 PM

Quote:

Originally Posted by RBMike (Post 319995)
I got my MBX6 down to 7 lbs, 4oz. The X-ray is a little lighter stock so you should be able to do it. I have a Tekin ESC & 1400 motor run off of a 6S 2600mAh Hyperion G3 (405 grams). Losi battery tray (lightened & modified). Some aluminium axles & ty screws.

run times???

TI screws are a little out of my price range:gasp:

SpEEdyBL 09.11.2009 05:06 PM

Depending on the size of the track, you'll need somewhere between 4,000 and 5,000 mAh on a 4s pack for 15 minutes. Despite higher voltage and a low kv motor being slightly more efficient, I still recommend 4s as it sits lower in the chassis. As far as a motor goes, I wouldn't run anything besides a tekin Rx8 motor. Simply put they are very efficient (at least mine is) and they are built for cars, and only an oz heavier than the novak motors. Neu motors have stiff wires which will fatigue and fail over time, which is why i wouldn't recommend them. Anyways, skimping on electronics is the worst way to save weight imo from experience.

For my 8ight, which is exactly 7.5lb with Aka City blocks and a Zippy Flightmax 4s 5000 mah battery, i get 18 to 29 minutes of runtime depending on the track and motor temps no higher than 130F with the Tekin 1900 kv motor, which is plenty. It's faster than nitro geared 16/46, but 14/46 is all i ever need. I have tried many 1/8 motor, battery, esc setups and this one is rock solid. Esc is the Mamba Monster w/ no fan as it just causes problems and is not necessary. For a grossly overpowered setup that will awe the nitro fans, just run 5s on the same motor, but i doubt it will ever improve your laptimes unless you are on a 200 ft track. For bashing on the street. i run 6s and it's pretty sick.

whitrzac 09.11.2009 05:21 PM

Quote:

Originally Posted by SpEEdyBL (Post 320062)
Depending on the size of the track, you'll need somewhere between 4,000 and 5,000 mAh on a 4s pack for 15 minutes. Despite higher voltage and a low kv motor being slightly more efficient, I still recommend 4s as it sits lower in the chassis. As far as a motor goes, I wouldn't run anything besides a tekin Rx8 motor. Simply put they are very efficient (at least mine is) and they are built for cars, and only an oz heavier than the novak motors. Neu motors have stiff wires which will fatigue and fail over time, which is why i wouldn't recommend them. Anyways, skimping on electronics is the worst way to save weight imo from experience.

For my 8ight, which is exactly 7.5lb with Aka City blocks and a Zippy Flightmax 4s 5000 mah battery, i get 18 to 29 minutes of runtime depending on the track and motor temps no higher than 130F with the Tekin 1900 kv motor, which is plenty. It's faster than nitro geared 16/46, but 14/46 is all i ever need. I have tried many 1/8 motor, battery, esc setups and this one is rock solid. Esc is the Mamba Monster w/ no fan as it just causes problems and is not necessary. For a grossly overpowered setup that will awe the nitro fans, just run 5s on the same motor, but i doubt it will ever improve your laptimes unless you are on a 200 ft track. For bashing on the street. i run 6s and it's pretty sick.

I didn't relize that the tekin buggy motors were that light, the only thing I have/had to compair was my truggy motor and a novak one



IDK, but I like the idea of a lower Mah 6s...

it is a 200ft track...:party:

now, I know there are diffrent weaves of CF, but I found this on ebay is it any good???

RBMike 09.14.2009 02:43 PM

Quote:

Originally Posted by whitrzac (Post 319999)
run times???

TI screws are a little out of my price range:gasp:

Run time at medium large outdoor track is around 15 minutes.

TI screw kits for Mugen are about $75.

In a typical 5 minute qual with 1.5 to 2 minutes of warm up I burn around 950mA.

On an 85 deg day, motor= about 120 to 130 deg, ESC w/no fan= about 130 to 140 & cells around 110.

whitrzac 09.14.2009 05:17 PM

Quote:

Originally Posted by RBMike (Post 320722)
Run time at medium large outdoor track is around 15 minutes.

TI screw kits for Mugen are about $75.

In a typical 5 minute qual with 1.5 to 2 minutes of warm up I burn around 950mA.

On an 85 deg day, motor= about 120 to 130 deg, ESC w/no fan= about 130 to 140 & cells around 110.

how much weight did they shave off???

RBMike 09.14.2009 06:25 PM

If your talking about the screws, I cannot remember but seems like it was a few oz (did it a year ago). Problem is that I don't see any other mfg making Ti kits for their cars. Mugen has for years. To buy them seperately would cost a bunch.

whitrzac 09.14.2009 08:02 PM

Quote:

Originally Posted by RBMike (Post 320764)
If your talking about the screws, I cannot remember but seems like it was a few oz (did it a year ago). Problem is that I don't see any other mfg making Ti kits for their cars. Mugen has for years. To buy them seperately would cost a bunch.

I'll buy one of the mugan screw kits and hope that most of them fit...

drkros3 09.14.2009 10:56 PM

its going to be pretty exensive to do a 7 pound electric 808. my nitro 808 weights 7.2 pounds. and it is stock. and i know the electric stuff is going to weight more and xray hop up parts that lighten it are not cheap.

but good luck and if you do get it to 7 pounds. good luck controlling it lol. i have a little 3 port motor in mine that can keep up with any motor. even my buddys crazy modified nova's

whitrzac 09.14.2009 11:01 PM

Quote:

Originally Posted by drkros3 (Post 320826)
its going to be pretty exensive to do a 7 pound electric 808. my nitro 808 weights 7.2 pounds. and it is stock. and i know the electric stuff is going to weight more and xray hop up parts that lighten it are not cheap.


I'v got all winter to buy stuff:yes: and I won't be keeping any recipts:whistle:

the list
one off custom chassis/batt box
TI turnbuckles
alloy "balls" that go into the rod ends
CF front top plate
alloy axles


whats everyone think about useing standard 14mm shocks instaid of BBs???

what about a CF motor plate?:neutral:

from what I'v read, I can melt the resin and "bend" the CF with a heat gun, right?


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