Help me with Brushless CRT.5

[DRIFT_BUGGY]

I have a CRT.5 and has the ext. chassis on it from OFNA and have got bored and sick of nitro already and wanting to make it brushless as I miss my brushless B44. Do all I require is the motor mount or do I have to get the whole chassis kit from RC Monster?
I am planning on using the Mamba Max ESC but have been told that the Mamba motors are to powerful for this little guy and you wouldn't be able to get the right gearing which would make it overheat. What motors do most people run with?
Is it best to change to bigger tyres? Truck instead of the stock buggy ones

Thanks in advance

[steve050773]

There's a ton of info on the CRT.5 down in the truggy section here.

All you have to have from Mike is the motor mount, assuming you can figure out a way to mount your battery and ESC that you like. I used the ofna ext chassis, Mike's motor mount, an old emaxx battery tray, and a cut down stock radio tray for my conversion and it works really well for me. This length doesn't require the bigger tires, but I do run some every now and then (gladiators).

I'll go out on a limb and say most people probably go for more powerful options than the MM motors. The crt.5 is heavier than most people give it credit for.

However, I think the lower KV rated MM motors have been successfully used in the CRT.5. I'd go 4600, but 5700 would probably work too with the right gearing and cell count.

Personally, I chose to go with a 3600kv rated Neu. That gave me the flexibility to use either 2s or 3s depending on gearing etc. You may also consider saving a few bucks and using the Sidewinder esc - its performed like a champ with my Neu.

[GO-RIDE.com]

Steve, which Neu did you use and did you run it on 2S? I'm considering a 1506 on 2S to replace my Novak GTB/6.5 combo.

[GO-RIDE.com]

RC Kaos,

There is a ton of info on this site for the crt.5. The mamba max works great, but the mamba motors tend to run hot, especially if you use 2.2 truck tires which a lot of guys like. If you do go with a mamba motor I wouldn't go any higher kv than the 5700. Most guys are running a MM esc and a Feigao L can motor on 3S. Keep your batts light. Somewhere around 250 gm or less. The car handles a lot better with light batts.

I run a Novak GTB/6.5 (6400kv) on 2S an it works great geared 12:46 with truck tires and 13:46 with buggy. I love the way it handles on the track, but mine is definitely not the crazy wheely machine that some guys have.

For my money the RCM extended chassis is awesome. But, of course with that chassis you are getting close to 10th scale.

Originally Posted by RC_KAOS

I have a CRT.5 and has the ext. chassis on it from OFNA and have got bored and sick of nitro already and wanting to make it brushless as I miss my brushless B44. Do all I require is the motor mount or do I have to get the whole chassis kit from RC Monster?
I am planning on using the Mamba Max ESC but have been told that the Mamba motors are to powerful for this little guy and you wouldn't be able to get the right gearing which would make it overheat. What motors do most people run with?
Is it best to change to bigger tyres? Truck instead of the stock buggy ones

Thanks in advance

[steve050773]

I use a 1506 and I'm pretty sure the wind designation is 1.5y. I run it on 2s almost exclusively and I'm geared for mid thirties.

[GO-RIDE.com]

Originally Posted by steve050773

I use a 1506 and I'm pretty sure the wind designation is 1.5y. I run it on 2s almost exclusively and I'm geared for mid thirties.

So are you running about a 16:46 gearing and truck tires? I was leaning towards the 1y at 5500 kv, but I can't seem to find any amp draw ratings for the Neu motors.

[DRIFT_BUGGY]

Yeah, after reading I think I may go with the Feigao 540L - 8L , 77A, 3072kv Motor and run the Mamba ESC and Mamba BEC. Still no sure on the battery side of things, was thinking maybe FlightPower LiPo 11.1V 4250mAh Evo Lite 3S. Would that be fine with this setup and what type of run time would I get?
And is it better to run with bigger tires or just keep the smaller/standard buggy ones?

[MetalMan]

Originally Posted by RC_KAOS

Yeah, after reading I think I may go with the Feigao 540L - 8L , 77A, 3072kv Motor and run the Mamba ESC and Mamba BEC. Still no sure on the battery side of things, was thinking maybe FlightPower LiPo 11.1V 4250mAh Evo Lite 3S. Would that be fine with this setup and what type of run time would I get?
And is it better to run with bigger tires or just keep the smaller/standard buggy ones?

I've had good luck with a Feigao 9L, 3s 4000mah 20C Lipo, 18/46 gearing, and truck Holeshots and Dirt Works on a custom extended chassis (it's the same wheelbase as Mike's chassis).

[DRIFT_BUGGY]

Has anyone tried the Tekin Redlines? I just noticed that they do a 3200kv and 3700kv brushless motors

[DRIFT_BUGGY]

Alright, I have pretty much decided on what gear to run.
I am going to be running the Tekin 3700KV motor and Mamba Max ESC (with fan) while running ProTek 3S 20C 4000mAh. Will keep running the standard size tyres. What gearing should I start off with? The track is fairly large.

Also, what Gear Ratio do most people aim for with the BL CRT.5? Running 3700KV x 11.1 (41070RPM) and 14T Pinion and 46T Spur with Stuck Buggy Tyres (3.5") the drive ratio is 10.68:1

[MetalMan]

For mine, I shot for ~40mph. If you haven't seen it already, BrianG has a really cool speed calculator available:
http://scriptasylum.com/rc_speed/index.html (click "Top Speed Estimator")
Throw in the various numbers, and it will give an estimated speed at WOT.