4 cylinder 170 CC 4 stroke motor using a Losi 5ive drivetrain

[saxtoft]

OK here is my new project.
After having done the first twin motor in a HPI Baja in the world back in 2007 it seems time for a new project and not just the further development of the former.

So here we go.

This project is based on a 4 cylinder 4 stroke boxer motor from the company Rotomotor. It is 170 CC, so it will kick some ass even it is only a 4 stroke. I am guessing is will be like a 85 CC in power, but with a momentum the is way better.
The motor is this one.



It runs from 500 to 5500 RPM with a 40 cm 300 g propeller. I am going to modify it with a flywheel, clutch system and starter system rotating about 1000 g to keep the inertia.
It will be cooled by a custom cooling system.
The clutch system will be a Pro MX 70 mm, housing both the clutch and the flywheel. From this there will be a gearing of about 3:2 to the drive train
The drive train will be from a Losi 5ive, upgraded as much as possible, with alu gear boxer and other parts like the dog bones and cups.
All will be welded into a custom frame.

This is a sponsored project.
The current list of sponsors are:

Rotomotor
MMR Modeltech
FG-Hobby
DDM
Innovative RC
Hostile
PhatDad
RC4WD
RC Motor

 

[saxtoft]

Here are some photos from the early deveopment of the starter system, flywheel and clutch system mounted on the motor. All printed in PLA to test fit.
Now I am just waiting on parts from the machinist.

 

[saxtoft]

This is where we are going..

 

[atom3624]

That is a monster of a motor!!
Is there enough room on a 5ive?

Why not drop 70cc and double the cylinders, and get a Conley V8?

Al.

 

[saxtoft]

Yes it fits is a Losi 5ive with the parts I designed.
Actually it is not that big with the hub comes off.
There is no need to make a special frame like I am doing. It will bolt on to a standard Losi bottom plate with some extra holes.

 

[saxtoft]

I have been thinking about a Conley many times and I have spoken to them, but it requires a large cooler and water tank or it will only run short runs.
I have done water cooling before as I was the first to build a twin into a Baja. It can be done, but it is more complex than air cooling.

 

[atom3624]

Understood.
Too complicated for regular running.

This is a great build thread.

Keep us updated please.

Al.

 

[VooDuuChild]

Wow.....with the right exhaust that will sound fierce!!!!
I don't know why the thumbs down showed up...I can't get rid of it.....I think this is an awesome build...can't wait to hear it run
there we go...got it....thumbs up lol

 

[myrcbud]

Any news on this? Wondering how the project is coming along I love seeing innovation in the hobby. Even if it's just for demonstrating purposes or not. Gets the wheels turning for practical upgrades or new products all together.

 

[suicyderider]

dead thread

 

[Losi5ive]

this thing ever come together?

 

[Seandonato73]

The member that started this project hasn't been on since augest of 2015....