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juleo68

TRF415msx-Porsche 934 30th Anniversary Replica

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Hi

I like the 30th anniversary Porsche 934 RSR Turbo, based TA05-MS chassis...first, too expensive...and very hard to find!

Here's the chassis I'll be using as a base...

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First issue...the chassis wheelbase is 255 / 260mm, the body 235mm...clearly not okay!

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See you ;)

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Hello!

As I saying, the chassis is too long...I'm gonna have to make a shorter one but, in fisrt I have to draw it!

The yellow area will be deleted, You can see the bottom one, this will be the new chassis...

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I begin by the wooden (mdf) prototype

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All positions are tip-top :)

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Now the body fit correctly!

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Had me intrigued, this is awesome, what are you using as the shorter front belt over the original?

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4 minutes ago, mtbkym01 said:

Had me intrigued, this is awesome, what are you using as the shorter front belt over the original?

You'll have to wait and see...:lol:

 

Here the first prototype of the belt tensioner, I couldn't find a belt of the right length.

HvfoByU.jpg?1

 

And the finale parts, CNC machined, raw material is FRP, the chassis will receive a shorty lipo.

i94BhKQ.jpg?1

 

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1 hour ago, juleo68 said:

You'll have to wait and see...:lol:

 

Here the first prototype of the belt tensioner, I couldn't find a belt of the right length.

HvfoByU.jpg?1

 

And the finale parts, CNC machined, raw material is FRP, the chassis will receive a shorty lipo.

i94BhKQ.jpg?1

 

Yep, Awesome

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Very nicely done. The quality of your custom parts is most impressive!

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I’d be interested in a chassis if you decide to cut another

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Hi guys

Thanks for your replies :)

All parts were made by CNC milling.

I do the drawing, programing and machining.

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Hi

I can start the assembly.

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Here, ball joints that were installed...:blink:

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Rear bulkheads + ball diff installation.

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The new belt is an Yokomo DRB-480B1 160T

The center pulley is an Team Associated!

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Can you estimate exactly how many teeth your belt needs to be to fit perfectly without that tensioner... either total teeth or how many teeth the original belt needs to be shortened by. 

I can try lookup RC belt encyclopaedia.

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3 hours ago, WillyChang said:

Can you estimate exactly how many teeth your belt needs to be to fit perfectly without that tensioner... either total teeth or how many teeth the original belt needs to be shortened by. 

I can try lookup RC belt encyclopaedia.

The original belt has 223 teeth, the new one which is a Yokomo has 160 teeth...estimating the exact number of teeth...not easy, I think you'd have to take out between 8 and 10 teeth...

 

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The body is now adjusted!

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Servo 7kg low profil  from Tamico!
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Shorty lipo brackets in place
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2 hours ago, mtbkym01 said:

I love this thing

Exactly what I thought. ☺️

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Are there wider wheels you can mount on the rear (in matching style of course)?

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On 1/12/2020 at 8:33 AM, juleo68 said:

estimating the exact number of teeth...not easy, I think you'd have to take out between 8 and 10 teeth...

 

Take some spare/worn belt, cut it to length and then measure length or count teeth. RC belts are standard size, module S3M if I recall corectly, so it is possible to source almost any length.

 

Anyway, great project. Custom parts look perfect

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9 hours ago, Bazyli said:

Are there wider wheels you can mount on the rear (in matching style of course)?

Surely...but 4 rims installed are same! The problem are to find different width for front / rear (rims / tires)

 

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Hi

Next pics with the body fitted!

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Before I starting to paint the body, I wanted to install the brushless combo a 13T motor!

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It's not that easy to get everything in place...;)

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I'm ready to paint the body!

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The paint is PS-54 from Tamiya.

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On 1/12/2020 at 11:44 AM, WillyChang said:

Can you estimate exactly how many teeth your belt needs to be to fit perfectly without that tensioner... either total teeth or how many teeth the original belt needs to be shortened by. 

I can try lookup RC belt encyclopaedia.

The belts are not RC specific; they are just belts. The belts are manufactured in practically every reasonable tooth count in any of the various standard tooth sizes. The factories just manufacture very wide belts to those two parameters. When you place an order with a supplier, they cut off slices of the belt in your desired width. You can have a minimum order of a single belt. That’s where the confluence of China’s manufacturing base and eagerness of many people to do a lot of work for little profit come together to benefit the hobbyist. When I was restoring a TA-04, I ordered belts that were the same tooth count and width as standard as well as more wide and with one less tooth to experiment a bit.

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Hi

I continue with the body finishing!

Now the front spoiler, the orange is not the Tamiya one.

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Backing with a layer of white.

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I starting the rear spoiler

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Ready to put the stickers on...not so easy!!

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Stickers done!

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