[littlemonsta]

Hi All,

[edited and corrections]

I am new to RC and and new to drifting. I got this E4D Brushless 6.5T and I am in the midst of converting it to RWD. I just need a little help with converting it to a reasonable rwd. 

Running Surface: Polished Tiles 
Tires : Rubber Hard Compound 
Everything is standard E4d, i only removed the belt from the front to the back. 

Mods : 
e4d MF knuckles
Shaved Chassis (for more turn angle)
Rear Battery Position (approximately 350grams)
Front Weight (125grams)

Front Toe : out slightly 
Front camber : 2 deg
Rear Camber : 7.7 Deg [this is wrong. 0-2degs only needed]

Diffs are still in.

1) I have a problem that the car doesn't turn sometimes. Wheels are at full lock but the car seems to go in a straight line when it is going fast. Is this normal ? I have no problems if throttle is really low / or surfaces with more traction. 
[ Yes this is normal]

2) I am looking for  Y lower suspension arm joints to fit. Anyone has any ideas of which would fit ?  Can i use the Sakura D4 lower arms ? or anyone has the dims for it ? e4d lower arm is about 29mm length and 5mm thick.
[Sakura D4 lower arms fits]


3) Is a gyro recommended for RWD cars ? Will this resolve most of the fish tailing ? or will it still happen if over throttle ?
[Gyro is needed]

4) Do i need to remove the front diff ? so there is smoother front wheel movement ? 
[ Front diff gone for more angle]
5) Any suggestions to improve on handling ? Softer rubber tires ?
[ Gyro, controller, harder tires, proper weight placement]

[littlemonsta]

Hi All

finally have a little more stability with the car. I am just updating on this little project. After reading and researching a little more.

1) changed receiver
I picked up a rc4g receiver with gyro. Removed stock receiver. reduced EPA for throttle to 30℅
This reduced help to increase the speed of the car and a little more stability in the rear.


2)servo
My servo died. Original servo had too much slop. I just changed my servo yesterday to Sanwa Airtronics. This servo is awesome. The original servo was causing the wheels to move side to side even in a straight line. This was one of the contributing factors of the steering problems.


3) steering
Since I was at my local rc shop, I decided to pick up some steering system for the e4d mf.
The original e4d steering was very loose. I was disappointed when the parts were not an exact fit and had to do more mods to it.

My steering angle reduced because of this setup. I am planning to move the steering towards the front by 10mm hopefully that will help.




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[littlemonsta]

Hi All,

This is my test run. Hopefully you can help me with some tuning tips further. 

Run Tires : 

MST CSR Hard (Green dot) - In Front
Unbranded Rear Hard Tires - Back


I am still struggling to get stability on some smooth tiles surface. Am i running wrong tires ? Any suggestion for tires on that surface ?
At low speeds, at the end of the corner, the car tends to oversteer with momentum. At higher speeds the understeer. 

At home the tiles seem to be more grippy. Slightly more controllable.

Please let me know if I am heading the right way for conversion project. Thanks in Advance.

[littlemonsta]

I think i figured it out. My tires are the main issue and the car is too light. Its not perfect but seems to be more drivable now. 

1) Added wheel spacers to the rear tires. The 3.3mm spacers come standard with the E4D. 

2) 100 grams of weights added in the front. 

3) Custom mono Shock in the Front. This helps the car understeer a little at the same time, it helps counter the massive oversteer I have during low speeds. 

4) Battery Position on top of motor. 

Total Weight of the car is at 1.7 kgs give or take 

Drift Practice :

[video=youtube]https://youtu.be/xwX5p9ONYXc[/video]



Now to get the proper parts I need. Please let me know what you think on what should be an improvement.

[littlemonsta]

Here is the test for the Custom Mono Shock.



 [video=youtube]https://youtu.be/Zpmvox6ER7A[/video]

[littlemonsta]

Update

After changing my top chassis.i reverted to original steering arms.



There is a slight reduction in steering angle. But it is much better position now.

Front monoshock :
I reduced the height of the absorber so it didn't jut out of the body. However due to this, my front suspension is too soft. I have ordered new springs to accommodate these changes.


My stealth mounts arrived. So this was installed.



I just order some y arms, steering kit hopefully they come soon. 15days wait.

Custom free rolling diy rear suspension
I just added own copy of bagi suspension.

I had made a mistake initially and use the same setup as my front mono shock diy. I found that the body roll is stabilised by the rear suspension. I had to modify the steering arms and glue them together.


I am waiting for new absorbers to come.i find this setup with the free rolling to be more tricky in controls.

I added some weight to the front chassis. Bought magnets from daiso . Local dollar shop.



Ordered
Sakura d4 y arms
Sakura d4 steering set

Keeping fingers crossed that it will fit.

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[littlemonsta]

Update

After changing my top chassis.i reverted to original steering arms.



There is a slight reduction in steering angle. But it is much better position now.

Front monoshock :
I reduced the height of the absorber so it didn't jut out of the body. However due to this, my front suspension is too soft. I have ordered new springs to accommodate these changes.


My stealth mounts arrived. So this was installed.



I just order some y arms, steering kit hopefully they come soon. 15days wait.

Custom free rolling diy rear suspension
I just added own copy of bagi suspension.

I had made a mistake initially and use the same setup as my front mono shock diy. I found that the body roll is stabilised by the rear suspension. I had to modify the steering arms and glue them together.


I am waiting for new absorbers to come.i find this setup with the free rolling to be more tricky in controls.

I added some weight to the front chassis. Bought magnets from daiso . Local dollar shop.



Ordered
Sakura d4 y arms
Sakura d4 steering set

Keeping fingers crossed that it will fit.

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Final update. Parts all arrived.



Changed the steering system to sakura d4 rwd OEM. More of the chassis was cut and drilled. After installation of arms , they still need a little extension.

Sakura d4 y arms oem. Fitted this with standard ball end joints. One m3 x 12screw on the inside. And another small m3 screw to hold the joint.

Had to raise the joints holding the y arms so the arms can drop down. One 20mm spacer behind the arm and 5mm in the front.



2 rodends connected to mf hub on the top. One to adjust camber and the other Ackerman.


To strengthen chasis from too much flex. I added some metal fixtures from ace hardware. 2x m3 x 8, m3 hex nut, and some backup plates 1/8inch diameter.


I was hoping to pick up from ds racing Thailand some bagi suspension systems. However they were out of stock. So continued with my own version for now.

I managed to pickup some DS racing tires RWD f two. They were nice to open the shop despite being a holiday in Bangkok.


Changed my springs, 25mm soft springs in the front and back. Medium soft for chassis roll control.

Rear camber 1 deg.
Front camber 4 degs.
Front camber 1 deg at 45 deg turn.

I still need a some major adjustments on steering settings and suspension.

Still can't get my wheels to align properly.




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[littlemonsta]

Reworking on the chassis again.

After learning more on the d4, made some changes on the body.


  IMG_20170228_230444.jpg (Size: 63.26 KB / Downloads: 11)

Added home made battery tray. Made from IPhone 5s cover and handphone holder. Will need to respray this.


  IMG_20170228_230607.jpg (Size: 59.12 KB / Downloads: 11)

Fixed steering wiper extensions. Steering angle back to normal. Removed home made mono shock. Added d4 mono shock.

Reoiled rear shocks. Now working again. Removed custom rubbish. Installed shocks normally.

Donated my motor and ESC to my brother. Ordered some new electronics and waiting for them to arrive.

1. Hobbywing clone 120a ESC
2. Jx pdi 6208mg servo
3. Will savage the team powers motor 10.5t from the d4
4. Power star gyro.

Total cost USD 70 USD.

Items needed:
Still need to pickup a cheap Sanwa receiver. Will try to look for a used one or will use original team magic e4d for time being.

64p pinion gear 18-20t

Wip:

Need to change front upper linkage.



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[littlemonsta]

Installed the motor from my d4 and got a speed passion esc. It was a bargain that I could not resist.


  20170305_222323.jpg (Size: 67.72 KB / Downloads: 9)

Spayed the home made battery tray. Hopefully it still works after the spraying.
  20170305_222223.jpg (Size: 61.21 KB / Downloads: 9)

Picked up Sanwa rx371 receiver so I can use my remote on this chassis.

Can't wait for the servo to come and gyro to come. The last 2 parts to complete the car. Please come this week.

  20170305_224152.jpg (Size: 63.15 KB / Downloads: 9)



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[littlemonsta]

Parts are in. Installed the final parts to the car. Gyro and the servo in. car
  IMG_20170313_205540.jpg (Size: 82.58 KB / Downloads: 6)

First test drive was a total failure. What used to work didn't work.

I repositioned the steering system. It was lob sided. Centered it to the best I can and moved it closer to the wheels. Removed aluminium steering rack. Put it in my D4. Back to plastics parts for the TM.
  IMG_20170313_205601.jpg (Size: 61.3 KB / Downloads: 6)

Installed the upper arms from my D4. Wow my e4d looks like a d4 now. Only part missing is the knuckles which I'm waiting to install. However I don't have any spare bearing for it.

At home car seems to handle decently. Still don't like the mono shocks. Car seems to heavy at the back.


  IMG_20170313_205958.jpg (Size: 71.95 KB / Downloads: 7)
  IMG_20170313_205901.jpg (Size: 75.13 KB / Downloads: 7)

After the track test will update. Current problem now is at full lock the wheels don't return to center. Partially fixed this problem until tiny d4 opinion knuckles go in.

I should call this car 3 Magic - e4d4


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