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Frankster

Sponge Bob Square Pants!

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Hi all,

I found this used RC toy and wanted to Tamiya it!   A few options are being considered.:

1. Comical chassis GF-01 (4WD)

2. Comical chassis WR-02 (2WD)

3. Wild Willy chase with Lunchbox tires. 

4. TA-02 with 3D printed chassis

#1 and #2 are comical and wheelbase matches. #3 wheelbase works and is monsterized. Problem is with high center of gravity it will tip often and I am not sure I want to frequently to flip it back onto its wheels

Target now is #4.  A quick drift car with minimal flipping over. This will also give me a chance to learn to design and 3D print for the first time. 
Fingers crossed 🤞 


Wheelbase 175mm

Track width 200mm

Length 320mm

Width 230mm

 

83D6D138-4991-456B-B3C4-EC2F16B5012F.jpeg.6faab7ae5eca2c4f7c58efcc413d40e3.jpeg


8DFC5DE2-F9DB-489A-9F77-8650DABF0C03.jpeg.be39e14d7ab2d3b8e667be86bb18f502.jpeg

4FD576ED-33A4-4035-A816-DC9D6827629B.jpeg.bea9a15c8632d54936cf3e51603aafe2.jpeg

EA0AA922-E4BC-4ABE-9747-1232C622B0D4.jpeg.47ccacae8f72aeca3764ac053311199b.jpeg

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I think this will be great!

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Love it. Can’t wait to see how it comes out. I love this kind of build!!!

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Maybe you can hack the Grasshopper rear gearbox in or is that too high? Even better but pure blasphemy: get an old Golf chassis (58025) and hack that into the right dimensions? :rolleyes:

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2 hours ago, Tamiyastef said:

Maybe you can hack the Grasshopper rear gearbox in or is that too high? Even better but pure blasphemy: get an old Golf chassis (58025) and hack that into the right dimensions? :rolleyes:

I would be exiled from Tamiya Club for touching 58025 chassis for SBSP conversion 😵

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Back from lunar new year holidays and picked up an Open Calibra.  Not interested in the body but more on the chassis for my next build.

0A46D62A-9C1F-4A72-947D-94B842647004.jpeg.40b8b5f303aecf08075725e4873e7482.jpeg

322EC3E1-AB48-41AF-AE7B-E78ACEB36AFA.jpeg.e69b63fce3515098a260eb80f88114ef.jpeg

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Just noticed Tamiya tire is 63mm in diameter. Stock SBSP is 73mm rear and 64mm front. If I was sticking to RWD, I could make the rear wheels larger in diameter for a dragster look…

5D56D6EE-9B07-4D26-8840-F78A73EB1A92.jpeg

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Awesome. One other option you have is an MF01x. With no spacers the wheelbase would be 171 mm, which is probably close enough? Could you go for Tamiya racing truck tires (70 mm O/D) as another option.

This thing will be great regardless. Can you and @GeeWings please have a race with his Mario-Kart? 

 

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5 minutes ago, Nikko85 said:

Awesome. One other option you have is an MF01x. With no spacers the wheelbase would be 171 mm, which is probably close enough? Could you go for Tamiya racing truck tires (70 mm O/D) as another option.

This thing will be great regardless. Can you and @GeeWings please have a race with his Mario-Kart? 

 

I did consider the M class but wanted to match the existing track width at 200mm.  Full size touring was as close to stock SBSP.  M chassis would be too narrow. 
 

Mario Kart is awesome!   I still play video game with my kids

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49 minutes ago, Frankster said:

I did consider the M class but wanted to match the existing track width at 200mm.  Full size touring was as close to stock SBSP.  M chassis would be too narrow. 
 

Mario Kart is awesome!   I still play video game with my kids

 you can add longer TL01 arms to greatly increase the track width. Or even GF01CB arms. However I'm sure this will be fantastic! I am not familiar with this chassis but it looks nice.

46 minutes ago, Frankster said:

Panicked and thought the batt would not fit hard chassis.  Good to go!

944BB8F2-C572-4971-97D4-A2C83C1C5EE9.jpeg.9b5abf065d1497a3f799d9e31cab438e.jpeg

It was meant to be! 

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1 hour ago, Nikko85 said:

 you can add longer TL01 arms to greatly increase the track width. Or even GF01CB arms. However I'm sure this will be fantastic! I am not familiar with this chassis but it looks nice.

 

I was looking at Comical but batt is too high and will prob tip over.  
 

M chassis with TL01 arms is a new approach.  Never heard of this hack before.  Maybe next time as I am already down the rabbit hole with the TA02 chassis

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Very cool! Love this. I’m a huge fan of custom builds. Can’t wait to see more! 

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8 hours ago, GeeWings said:

Very cool! Love this. I’m a huge fan of custom builds. Can’t wait to see more! 

🤗

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On 1/26/2023 at 6:10 PM, Frankster said:

I was looking at Comical but batt is too high and will prob tip over.  
 

M chassis with TL01 arms is a new approach.  Never heard of this hack before.  Maybe next time as I am already down the rabbit hole with the TA02 chassis

Comical chassis use same geometry arms as TL-01, but slightly longer, so you can use them on M-chassis, too. Or even TL-01B arms, but that might be too wide.

 

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Picked up min requirements:

-bearings

-drift dish wheels to make the car look stock

-drift tires

-alum motor mount (weak point)

I will upgrade motor at a later point, let’s get this started first

0C63A9BF-5F79-40F4-AA45-2B8AC9A000D0.jpeg.e42757a809fd3e08f9a065b43e2b65a1.jpeg

90C6A031-FDCC-4E25-B3F3-B31659A3496A.jpeg.a18aac57263f4014d58a080cfd266c85.jpeg

 

Rear ball diff completed 

07D851A2-9116-401B-B609-9E279231D7DA.jpeg.172442642d19db9106235566b08237af.jpeg

 

Rear stock suspension assembly completed

21607739-7575-495E-9182-6F73EFDA829D.jpeg.81868d70b059215c7a4be2fab567ddfe.jpeg

It is a brand new kit but an old design.  I am surprised the amount of play in the suspension joints

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Picked up a US$4.25 digital caliber… 🤔 should be good enough for what I need to start 3D printing

BA9F6E2D-6934-4648-8A90-9DFBF38964D3.jpeg.c4a136871e4425ff44f2f04b8090fbc8.jpeg

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Front gearbox and suspension completed.  Notice the center drive shafts are not aligned in both x and y axis

E30D9BE0-D13C-4B28-8E0B-6663519E327E.jpeg.77460a839e7e8f3dac75a749e4c376bc.jpeg

Edited by Frankster
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Looks like everything fits within 175mm wheelbase.  Will need to hack steering but servo will sit over battery. 07BBCA05-0450-4FD0-9601-476BE0A8C27C.jpeg.998cc1c46f2ebc56470fbc9d606f34ff.jpeg

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I was not sure if the wheels would hit the battery.  Installed new dish wheels (to be painted later) and drift tires.  The wheels clear when at full lock.

DB1564CB-72BD-42BC-8518-A64062B641A1.jpeg.d3bb406c18b27de08c22d7e8fcf5d6ca.jpeg

Next I need to review existing body structure.  TA02 bumper will need to go or get cut down in size  

BC35AF9C-F207-4D45-A964-A0EBFC3503CE.jpeg.1ef1213d6bd8b51971ddf2804c4f9839.jpeg

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On 1/19/2023 at 3:06 PM, Frankster said:

Hi all,

I found this used RC toy and wanted to Tamiya it!   A few options are being considered.:

1. Comical chassis GF-01 (4WD)

2. Comical chassis WR-02 (2WD)

3. Wild Willy chase with Lunchbox tires. 

4. TA-02 with 3D printed chassis

#1 and #2 are comical and wheelbase matches. #3 wheelbase works and is monsterized. Problem is with high center of gravity it will tip often and I am not sure I want to frequently to flip it back onto its wheels

Target now is #4.  A quick drift car with minimal flipping over. This will also give me a chance to learn to design and 3D print for the first time. 
Fingers crossed 🤞 


Wheelbase 175mm

Track width 200mm

Length 320mm

Width 230mm

 

83D6D138-4991-456B-B3C4-EC2F16B5012F.jpeg.6faab7ae5eca2c4f7c58efcc413d40e3.jpeg


8DFC5DE2-F9DB-489A-9F77-8650DABF0C03.jpeg.be39e14d7ab2d3b8e667be86bb18f502.jpeg

4FD576ED-33A4-4035-A816-DC9D6827629B.jpeg.bea9a15c8632d54936cf3e51603aafe2.jpeg

EA0AA922-E4BC-4ABE-9747-1232C622B0D4.jpeg.47ccacae8f72aeca3764ac053311199b.jpeg

How about some fries with that 

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Printed chassis arrived.  Overall sturdy for what I need.  This new 2nd printed chassis fixed  mounting hole issues from my first attempt. 
ADE53B03-921B-440A-A180-8163E41F30C3.jpeg.d94ed419c56d87427e48d9401cb0046f.jpeg9DC4C40C-7D47-4708-829A-4B26B08D3DCB.jpeg.5ebfa3ea20df08097b591d17df879a3e.jpeg

This one also has 2 problems.

I did not chamfer the rear part and the chassis does not fit with the rear gearbox   I will try filing this down to make it fit.

67250976-B5EC-4E45-A6AD-41AD7A645538.jpeg.b3e9746c277b47cdf1cd107ab372a653.jpeg
second I did not measure the front gearbox holes properly.  

579BDAC9-05D4-43D0-B6B7-6560894A7E8B.jpeg.64d1c37b29d0b9d5b575bb62e2cec084.jpeg

Overall I will file the rear part of the chassis and drill larger holes in the front to confirm if there are any other issues.  Afterwards I will reprint the bottom chassis again

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Installed and modified the chassis to for north gear boxes   Not problems popping up from my print.

Cut / remove additional surplus attachment point to fit battery

3EBDA2B0-9A28-4254-8E03-6EBE01E646DD.jpeg.7fadd3b84d4340efb5ced8c056b70658.jpeg

Gap in attachment points

5494DE72-06B5-422F-9750-92A4C24F2CDC.jpeg.a7e4f5a3940459370e66f7981ab15b26.jpeg

Need to more space between top deck and bottom deck for battery and servo

6BDEACAD-473A-49FE-8E22-C742709D629E.jpeg.3e4e9b50cae34e8a7a7cbf474ff75f4e.jpeg

shift servo back

9ED8AA2D-2912-4E47-8967-CF60D4FC51E2.jpeg.2207e438a77d8c57bfe7af7c60e440b3.jpeg
need a shorter turnbuckle 33DA684F-B813-4809-A0F2-FD6CDBEA5F36.jpeg.c2303689a4fa795abae2bf1090304601.jpeg
 

Overall working well   Still need to reprint top and bottom chassis pieces

FB217C86-BF0A-4B58-AE0D-5BC63C6F19F3.jpeg.4e3429b07d772a719b18eb59d3365fa4.jpeg

 

 

 

78F54953-8FAF-4848-AB2A-D52DCB9DAC6F.jpeg

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