Rotang!

Started by Jamie R, September 05, 2023, 03:33:31 PM

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Mr Spiller

I love the name
First time it's popped into my feed


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Jamie R



So .... This uses 60 degree bent intakes which is an old design.
The principle is the same on the latest design which just uses a 90 degree bend

So we have housings, 2" tubes, IDA flange, 55mm - 50mm itb's, tapered trumpets to a tuned length which will give peak hp at 9000 rpm. Then for lower rpm and to flatten the torque curve we have 100 extension tubes which will stay attached until a set point on the rev range then move upwards 35mm to allow the air to rush in on the lower trumpets.


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The Rotus...
... coming soon to the family.... the Rotang

Jamie R

https://youtu.be/SnSADk9j7Mg?si=7tf_gXdQmsdau9N0

This vid shows an animation of the moving trumpets which is very common on high performance sports bikes


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The Rotus...
... coming soon to the family.... the Rotang

Jamie R




Cross section picture shows parallel walled tubes, then the flange, throttle body, first trumpet and extender trumpet is one continuous taper


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The Rotus...
... coming soon to the family.... the Rotang

Jamie R



Dimensions derived from a universally published SAE paper for PP engines


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The Rotus...
... coming soon to the family.... the Rotang

Mr Spiller

Word on street is
Your a bit clever


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Jamie R

Quote from: Mr Spiller on October 22, 2023, 10:04:07 PMWord on street is
Your a bit clever


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I wouldn't go that far ole bean, I'm just taking some basic dims and applying some logic.

I deffo won't cut it for any formula one teams

The tapered throttle body been ordered

https://www.efihardware.com/products/3284/ida-throttle-body-kits


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The Rotus...
... coming soon to the family.... the Rotang

Eccentric shaft

Moving trumpets. Goodness me, It's going to be half a 787B! A 393 and a half? 🤔
Hmmmmmm over braps

Jamie R

Quote from: Eccentric shaft on October 22, 2023, 10:13:53 PMMoving trumpets. Goodness me, It's going to be half a 787B! A 393 and a half?
Lol all wrapped up in Anglebox, just wanna achieve max hp from the PP and broaden the torque for better drive out the corners. Without all this turbo witch craft malarkey


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The Rotus...
... coming soon to the family.... the Rotang

MattScott

A little inspiration in case you are fed up with having bodywork

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RX-7, FD S2, JDM, White, 1994

Jamie R

Quote from: MattScott on October 24, 2023, 10:50:16 PMA little inspiration in case you are fed up with having bodywork

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That's very quirky


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The Rotus...
... coming soon to the family.... the Rotang

Jamie R



Next piece of the puzzle

New billet tapered bore throttle bodies. Fuel rails 4 x injectors. Variohm tps

Just don't ask £
The Rotus...
... coming soon to the family.... the Rotang

clive

Very nice, did it come with a brain ?
All the best Clive

Jamie R

Nope, just the throttle position sensor for now.

It's compatible with most popular ecu's. Haltech, link, motec etc

Just need to pick one that gives me the flexibility with the telescopic intakes.

But as that's only long and short positions, I'm using the vacuum actuator from the rx8 intake to control the lever, and that only needs 1 solenoid with 2 wires so should be easy


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The Rotus...
... coming soon to the family.... the Rotang

Jamie R



Homemade stickers


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The Rotus...
... coming soon to the family.... the Rotang