New engine development - your input into layout requested.

**Oakie** · 27th December 2007, 18:42

Originally Posted by Speedo-cop

Hey all - thanks very much for the replies and thought.

I'm noticing several themes:

- up the capacity and add a 250 to the line.
- really define the market ie road/offroad.
- there ARE a few people who seem happy with the 400single/800v-twin layout!

To design: By it's nature, the engine will have higher than average low-end torque for it's capacity, though I'll have to work hard to maintain high-range power, especially without pre/post combustion supercharging - which will be an option at a later date - though not at first, as one of the first major focuses to start is extreme simplicity. And fuel injection is inherent.

If anyone else would like to add their two cents - please do!

Sounds like you've got a good handle on this Speedo-cop. Hey you're not going to build these at Emma's place are you? She'll be pissed off if you get her carpet dirty.

**paturoa** · 27th December 2007, 20:01

How about something completely new?

I've searched a lot and never seen this before, which is something I've been thinking about for a long time since reading about a Chrysler inverted V aero engine for WW2. Google it, you will be surprised!

Imagine an upside down Guzzi 90 degree V twin. Dry sump it - benefits are many, mostly power!

Now, put a single plate dry clutch on the end of the crank shaft.

Rotate the sucker so the clutch is at the front.

Put a longitudinal gear box below that so that it is BETWEEN the cylinders and the drive shaft still comes out the back.

There is plenty of room for the exhaust out the front and intake / carbs behind.

Water cooling would be a must with this layout.

The only thing I haven't worked out is where the starter motor goes!

**FilthyLuka** · 27th December 2007, 21:43

paturoa

Please tell me thats a piss take...

**Squiggles** · 27th December 2007, 22:58

Originally Posted by DEATH_INC.

q1 with the 800, a fair bit. With the 400 not at all
q2 no, i'd see it as an advantage
400 single and 800 vtwin.
With the off-road capability anyone focusing on this will go with the 400 single, and anyone looking at the road side of it will go with the 800 twin. I don't believe that a 400 twin would be enough of an advantage to warrant the extra engineering...

I agree with this, a 400 single sounds right for off road, a 400 twin would be a waste for offroad, and not enough for those who want on road