Baja's RWD VDF V3

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bajaboy5b
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Baja's RWD VDF V3

Postby bajaboy5b » Sun Jul 14, 2013 9:33 am

A year of work and this is what has happened so far. Up to Ver.3 now ( well V3 2.0 but yet to take photos of that )

So far this is the best RWD I've ever built or driven, almost as fast as CS on carpet too. :)

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Boredom did this.....
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Update on the V3 2.0 will come soon.

Make: Tamiya/Homebrew
Model: VDF V3 RWD

Track surface: Carpet and tiles
Tire: HPI A type, HPI T drift and carpet drifterstreets
Motor & ESC: Speed Passion V3 MMM 13.5 and a Speed Passion GT2.0 LPF Blue star
Servo: Savox 1251mg

Front

Camber: -5
Toe: 0
Kick up: 0
Caster hubs: 8
Ride height: 10mm
Springs: stupid soft
Bumper weight: 15g
Sway-Bar: N/A
Shock Oil: 40wt

Rear

Camber: -0.5
Toe: in 0.5
Kick up: 0
Ride height: 9mm
Springs: Tamiya Red
Sway-Bar: N/A
Shock Oil: 25wt
Other: 1mm of pro squat

Drive Train

Rear: 30
Center: 23
Spur: 91
Pinion: 26

Thanks for looking.

-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Tue Jul 16, 2013 12:23 am

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Still has a little bit of flex surprisingly.
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-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby valve_timing » Fri Jul 19, 2013 7:57 am

Got any video of it in action

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Re: Baja's RWD VDF V3

Postby awdracer » Fri Jul 19, 2013 9:25 am

why put the battery in the back. starting to see it more and more on rwd cars..
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Re: Baja's RWD VDF V3

Postby bajaboy5b » Fri Jul 19, 2013 10:33 am

Video coming soon.

Rear battery was the best thing I've ever done to this project. More rear grip, near 50:50 balance, more stable on and off power, faster, better handling everywhere etc. It makes a huge difference but an utterly great one.

-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby Stalwart » Fri Jul 19, 2013 3:12 pm

awdracer wrote:why put the battery in the back. starting to see it more and more on rwd cars..


For the same reason i've put it on the front of my (now sold) TA05-VDF. It's an easiest way to dramatically change weight distribution.

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Sat Jul 20, 2013 6:56 am

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Fender split from a crash so I used real bondo and did a bit of weathering to fix it.
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I tired to make the shots look like those semi burly ones that you see of from Japan of real 1.1 cars.

Thanks for looking.

-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Sun Jul 28, 2013 5:09 am

Team PINK!!!

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Re: Baja's RWD VDF V3

Postby FunkRenegade » Wed Aug 21, 2013 4:10 pm

rwd without gyro looks clumsy and twitchy.

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Re: Baja's RWD VDF V3

Postby valve_timing » Wed Aug 21, 2013 4:30 pm

Yea you gotta constantly catch the car with CS

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Re: Baja's RWD VDF V3

Postby sharpe351 » Wed Aug 21, 2013 5:41 pm

Its a learning curve. You have to consider that on throttle, the car wants to donut. It makes it really difficult to wheel. However, the guys in my crew have had better luck using a front motor chassis. The car is really fast, a bit twitchy, but relatively smooth. The drift box is useless on a RWD car IMO. It takes steering out and cuts throttle when you need it to compensate for oversteer/understeer. The best thing we found is to give the car MORE under steer. It helps to control the issues with rotation. We narrowed the front wheels (5-8mm) to reduce front traction and create understeer.

sent from my GNex
Rides: Sakura D3 full option car, 124% c/s (-3deg camber)
Schumacher Mi3 Carpet Spec (103% c/s now known as the experimental beater--rarely drive this one anymore).

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Re: Baja's RWD VDF V3

Postby FunkRenegade » Wed Aug 21, 2013 6:28 pm

It takes super human reflex to steer like 1:1 without a gyro. Gyro is not there to make the car drive itself. It's there to smooth out the steering return like 1:1.

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Re: Baja's RWD VDF V3

Postby sharpe351 » Wed Aug 21, 2013 8:05 pm

Never worked for our build.

sent from my GNex
Rides: Sakura D3 full option car, 124% c/s (-3deg camber)
Schumacher Mi3 Carpet Spec (103% c/s now known as the experimental beater--rarely drive this one anymore).

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Re: Baja's RWD VDF V3

Postby valve_timing » Thu Aug 22, 2013 8:48 am

My next chassis will prolly be a frd I had a version one kit but sold it to get my current chassis I've deff caught the rwd bug

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Re: Baja's RWD VDF V3

Postby sharpe351 » Thu Aug 22, 2013 5:15 pm

BTW, bajaboy5b, nice work on the car. I saw a bit of this on another forum, but haven't seen you v2 until now. Looks to handle well. Keep up the good work!

sent from my GNex
Rides: Sakura D3 full option car, 124% c/s (-3deg camber)
Schumacher Mi3 Carpet Spec (103% c/s now known as the experimental beater--rarely drive this one anymore).

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Re: Baja's RWD VDF V3

Postby valentin » Thu Aug 22, 2013 6:20 pm

FunkRenegade wrote:rwd without gyro looks clumsy and twitchy.


it'll get better. CS was kinda the same way in it's early stages.

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Re: Baja's RWD VDF V3

Postby marshun » Thu Aug 22, 2013 7:17 pm

^i completely agree. ive been working on trying to get set ups to pick up speed a lot faster to keep up with the cs and regular 50/50 cars

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Fri Aug 23, 2013 10:57 am

Thanks guys.

I've been working on this a far bit and my new set up is very stable. No stupid wobble like my last running vid. I'll be posting a new one pretty soon anyway.

-Jeremy
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sharpe351
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Re: Baja's RWD VDF V3

Postby sharpe351 » Fri Aug 23, 2013 1:36 pm

marshun wrote:^i completely agree. ive been working on trying to get set ups to pick up speed a lot faster to keep up with the cs and regular 50/50 cars


Our cars tend to get much faster when running a low gearing with c/s'd cars. A lot of the guys tend to stick with a 10.5 or 13.5 and run gearing for torque. It makes the cars transition faster/easier.

valentin wrote:
FunkRenegade wrote:rwd without gyro looks clumsy and twitchy.


it'll get better. CS was kinda the same way in it's early stages.


Running c/s has been a battle of sorts. Balancing the car front to rear makes a great deal of difference.

bajaboy5b wrote:Thanks guys.

I've been working on this a far bit and my new set up is very stable. No stupid wobble like my last running vid. I'll be posting a new one pretty soon anyway.

-Jeremy


I'm glad to see someone who doesn't hide or horde their setup entirely. Our group (Skavenger FL) tends to share a lot of information to help the whole group improve.

sent from my GNex
Rides: Sakura D3 full option car, 124% c/s (-3deg camber)
Schumacher Mi3 Carpet Spec (103% c/s now known as the experimental beater--rarely drive this one anymore).

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Sat Aug 24, 2013 10:46 am

They're just toy cars and we're in the hobby for fun so I like to help people if I can. RWD is much harder than CS so it will be better for everyone is people shared their set ups more. The best thing I've done to my project lately is to go from 0.5 rear toe to a full one degree in. Huge difference and much much more stable.

Having a longer rear toe block doesn't only add toe, it spaces out the shocks more so you have a more 'laid down' shock witch helps with making the car more stable and smooth but without making it too sluggish.

-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby marshun » Sat Aug 24, 2013 12:25 pm

sharpe351 wrote:
marshun wrote:^i completely agree. ive been working on trying to get set ups to pick up speed a lot faster to keep up with the cs and regular 50/50 cars


Our cars tend to get much faster when running a low gearing with c/s'd cars. A lot of the guys tend to stick with a 10.5 or 13.5 and run gearing for torque. It makes the cars transition faster/easier.


yes i've found that out too. but theres a limit as to how much that helps. one of the easier parts of the puzzle for sure. :). suspension though...funnest thing to tune on rc cars.

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Re: Baja's RWD VDF V3

Postby sharpe351 » Sat Aug 24, 2013 12:39 pm

Indeed

sent from my GNex
Rides: Sakura D3 full option car, 124% c/s (-3deg camber)
Schumacher Mi3 Carpet Spec (103% c/s now known as the experimental beater--rarely drive this one anymore).

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Re: Baja's RWD VDF V3

Postby valentin » Tue Aug 27, 2013 5:15 pm

sharpe351 wrote:
marshun wrote:^i completely agree. ive been working on trying to get set ups to pick up speed a lot faster to keep up with the cs and regular 50/50 cars


Our cars tend to get much faster when running a low gearing with c/s'd cars. A lot of the guys tend to stick with a 10.5 or 13.5 and run gearing for torque. It makes the cars transition faster/easier.



I find that gearing lower essentially helps reduce wheel spin which can stabilize the car and you also get really good low throttle response which is crucial in throttle control for CS'd chassis. You can only gear so low though depending on the grip of the surface. I run a lot of outdoor asphalt that is prepped for onroad racing (sprayed with snow cone syrup and soda mixture) which is very grippy. Earlier this summer, there was a competition that was held that was on a very loose asphault, where we all had to gear up.

Most of the time I tend to just tinker with ride height and gearing to change setups for different surfaces. :up:

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Re: Baja's RWD VDF V3

Postby bajaboy5b » Sat Aug 31, 2013 7:10 pm

Image

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Track surface: Carpet
Tire: Street Jam Polycarbonate 60 degrees and Mikuni Evolution I Polycarbonate
Motor & ESC: Speed Passion V3 MMM 13.5 and a Speed Passion GT2.0 LPF Blue star
Servo: Savox 1251mg

Front

Camber: -5
Toe: -1
Kick up: 0
Caster hubs: 8
Ride height: 8mm
Springs: soft
Bumper weight: 100g
Sway-Bar: N/A
Shock Oil: 60wt

Rear

Camber: -2.5
Toe: +1
Kick up: 0.5mm
Ride height: 6mm
Springs: Tamiya Red
Sway-Bar: N/A
Shock Oil: 25wt

Drive Train

Rear: 36
Center: 18
Spur: 91
Pinion: 32

-Jeremy
Team PINK!!!

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Re: Baja's RWD VDF V3

Postby valve_timing » Wed Sep 04, 2013 2:39 pm

I saw this on rwd society very clean chassis I wanna see this thing in action


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