My D8Te w/RCM Conversion
 

Here is my D8Te that I'm almost done with.

I have a few small things to finish and clean up. I bought this as a roller locally and it was in fairly good shape overall.

It has;

RCM Conversion kit
Tekin RX8 ESC w/2000kv motor
XP 1015 Steering Servo
Spektem tx/rx

The RCM conversion kit is really nice. It installed so easy and hid all of the wiring as much as possible.

Can't wait to start driving this one, I should have it out and about later on this week.

http://i142.photobucket.com/albums/r...ril2011072.jpg
http://i142.photobucket.com/albums/r...ril2011111.jpg
http://i142.photobucket.com/albums/r...ril2011112.jpg
http://i142.photobucket.com/albums/r...ril2011113.jpg
http://i142.photobucket.com/albums/r...ril2011077.jpg

Let me know what you think,
Nick

Nice! :yipi:
I just finished my D8Te and test drove it yesterday! Fun Car, Very Quiet and smooth. Whats your gearing? I setup mine as follows:

MMM
CC1717
6s Zippy
18/50 Crimefighter LPR and I may up this to 21/50

The car is on rails. Very easy to drive.

Can you tell me what that front bumper is? I have seen some of them But I cannot recall the name of the company that makes them... :smile:

Looking good!

I need to give mine a tune up for the summer race season.

Bumper looks like a t-bone racing bumper.

Thanks for the compliments guys. The bumper is a T-Bone bumper. Right now this will be more of a basher for them. If I do go to race it I will probably take the bumper off, we will see.

Right now the gearing is the last thing I'm doing, along with hooking up the steering.

I think I'm going to start with 16/50 (if 50t is the stock gear thats in there). Then I will see how that goes and go from there.

Nick

I got the D8T up and running last night/ this morning. Everything looks good so far.

One thing I did notice was the spur and pinion gears being fairly loud. Is this normal with a 1/8th electric conversion with metal gears?

Is anyone running a plastic spur on there D8 or D8T?

Other than the noise it is all working out well. Everything worked the first time hooking it up, esc programmed on the first try and it was all really easy actually.

I just need to wait for my Tekin hotwire to come in then I can start driving it.

Does anyone have a good starting point for programming the RX8?

Thanks,
Nick

I am trying to determine a starting point for my D8Te. Would this work and be fairly safe to bash with on 4s?

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 14
Total Voltage: 14.80
Motor KV: 2100
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 1.00
Motor Current Draw: 140
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.57 : 1
Total Ratio: 15.35714 : 1
Tire Circumference (inches): 24.5 inches (622.41 mm)
Rollout: 1.60:1
Total Motor Speed: 31080 RPM
Vehicle Speed: 46.96 mph (75.44 km/h)
Effective KV Value: 2100
KT constant: 0.64 oz-in/A
Motor Torque: 0.47 ft-lbs
Final Torque: 7.21 ft-lbs
Final Power: 2072 watts (2.8 HP)


Then this is what I would use on 5s, does this look good?

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 12
Total Voltage: 18.50
Motor KV: 2100
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 1.00
Motor Current Draw: 140
Motor Coil Resistance: 0
Spur/Pinion Ratio: 4.17 : 1
Total Ratio: 17.91667 : 1
Tire Circumference (inches): 24.5 inches (622.41 mm)
Rollout: 1.37:1
Total Motor Speed: 38850 RPM
Vehicle Speed: 50.32 mph (80.83 km/h)
Effective KV Value: 2100
KT constant: 0.64 oz-in/A
Motor Torque: 0.47 ft-lbs
Final Torque: 8.41 ft-lbs
Final Power: 2590 watts (3.5 HP)

Thanks for the help,
Nick

I used Kyosho plastic spurs but all of them were eaten alive within a run or two. Don't bother unless you're racing or the sound starts to really bother you AND you plan to run the mechanical brakes.

Good call on Mike's center diff plate, I told you that thing is a must!

Your gearing and everything looks pretty good. Give it a run and after a few passes check the temps. As for the Rx8 setup, start with 40% brake power and go from there. Oh and use FWD/DEL, it's forward with brake but a delay between brake and reverse.

Nice D8Te there fella, makes me want to get my NIB D8T converted but to many RC projects on the go at the same time!! lol

Here are a few updated pictures of my D8Te.

Nothing new under the hood, just a new body and a few new sets of wheels.

http://i142.photobucket.com/albums/r...C/IMG_7843.jpg

http://i142.photobucket.com/albums/r...C/IMG_7842.jpg

Heres the old body. It's the original nitro body with the holes filled in with tape. Still holding together. I run this one at the beach also.

http://i142.photobucket.com/albums/r...C/IMG_7580.jpg

Let me know what you think.

Nick

Just got done putting a CC 1520 in the D8T. Just need to wait until tomorrow for the loctite to dry and to program the esc. Then we will be off and running.

Pics in the morning.

Nick

Here are some pics of my new seteup.

CC 1520 1600kv
Tekin RX8
14/50 gearing
5s 20c Zipp Lipo

The 1520 looks pretty big next to the T8 2000kv.

http://i142.photobucket.com/albums/r...92/RC/0092.jpg

http://i142.photobucket.com/albums/r...92/RC/0182.jpg

http://i142.photobucket.com/albums/r...92/RC/0172.jpg

I still need to shorted the motor/esc wires and program the RX8.

Can't wait to see what this new motor can do.

Nick

the 1520 is insane, i use it on my d8t and it is almost to much. its lika rocket. i have to be carfull when driving ore im just gonna melt the center diff.

it is best to use 6s ore more and bullet connectors.

What is your setup Freddy?

Gearing also would help a lot.

Thanks,
Nick

im using the same spur gear as vorza, gonna check the exact tooth of the gears tomorrow.

Sounds good Freddy, what ESC are you running?

Thanks,
Nick

CC mamba monster

Just got my D8T with 1520 all programmed and the correct gear on.

Damn this thing is fast now. It was quick before, now it's fast. The mid range is much more than the Tekin motor and I'm still running it very easy.

5s with 17/50 gearing.

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 50
Pinion Tooth Count: 17
Total Voltage: 18.50
Motor KV: 1600
Tire Diameter (inches): 5.84
Tire Ballooning (inches): .10
Motor Current Draw: 140
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.94 : 1
Total Ratio: 12.64706 : 1
Tire Circumference (inches): 18.98 inches (481.97 mm)
Rollout: 1.50:1
Total Motor Speed: 29600 RPM
Vehicle Speed: 42.06 mph (67.56 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
Motor Torque: 0.62 ft-lbs
Final Torque: 7.79 ft-lbs
Final Power: 2590 watts (3.5 HP)


I think my next purchase is some 3s lipo's so I can run this motor on 6s. It should be interesting.

Video coming soon.

Nick

Just checked my gearing, im running with a 17t pinion and 48t spur:smile:

So your running 17/48 on 6s and I'm running,
17/50 on 5s and think its fast.

I can't wait to try 6s now.

Do you have any pictures or video of your D8T

Thanks for the help,
Nick

It is very fast, the temp is nice to
http://bildr.no/thumb/1206350.jpeg

edit, it is a old picture. im using castle 6,5mm bullets now

The 1520 motor is a beast for sure. Love it in my mbx5T. I really wish castle made these part of their normal line....they would be huge sellers as they have many uses.

That stat is key to cool temps and a lot of fun!! Of course the 3.5HP and almost 8ft-lbs of torque doesn't hurt either

So what your saying is that lower RPM's keep the motor cool?

I've run that speed calculate with 6s and RPM's are 35,000. Is that to high? On 4s the RPM's are down in the 24-25,000 range and the truck feels slow.

Thanks again for the help,
Nick

it seems that for that motor 30K is the sweet spot. on 6s 35K is not bad either....just more fun!

So if 30-35k is it's sweet spot will it really spin up to 60k rpm's?

How about a Mamba XL on 8s? I would assume the 1520 would be out of control on 8s. I wonder how big of a vehicle it would handle being run on 8s, size wise? And would it survive.

I've been thinking of stretching my D8T or another truggy chassis. I'd run a Mamba XL and either a 2028 or another castle motor, depending on the size of the truck. My biggest problem is figuring out a body if I don't make it as big as a 1/5 scale, there really isn't anything between 1/8 and 1/5 scale.


Nick

Well...will the motor spin up to 60K and survive for long...probably not. Many here feel that anything under 35K is using the motor at its peak efficiency. I personally try to keep it under 30K when ever possible depending on set up. Put it this way...with my set up, the motor is only spinning 26K. Top speed is 40 or so which is fine as I am not looking for speed runs.

How are you getting 26k RPM's? If your running 5s lipo in any gearing it still comes out to 29k rpm's.

Life batteries maybe?

Thanks,
Nick

Hes probly using the nominal voltage of lipos and not the 4.2v. try with 3.7

Just sold this truggy. It was a lot of fun while I had it. It had been broken and sitting around for a number of years in my basement so time to let it go off to a new home. On to the next project.

Did you at least keep that long motor? they dont make them anymore you know?

Yes sir, I kept the CC 1520. I tried to sell it and someone told me they think its a fake. Still not 100% sure if it's a fake or not I just kept it either way. It always ran great for me and had TONS of power. I still have my Tamiya truggy.