Vespa Dry Lake Racer lives...

[ChrisACT]

Nice, mate.

So ... are you taking orders?

[internetscooter]

Nice, mate.

So ... are you taking orders?

Only if I can write off everything I have spent as a tax loss

[gennyshovel]

One of the advantages of spending heaps of money on LSR projects is the tool collection grows in relation to the ambitions.

[internetscooter]

One of the advantages of spending heaps of money on LSR projects is the tool collection grows in relation to the ambitions.

Actually I inherited a lathe with mill head from my dad... then I thought I need some sort of project to use them on... so here I am

The CNC machine is actually built from the mill head (which my dad would very much approved of)

[internetscooter]

B is for...

[gennyshovel]

WOOHOOOOO !

[BONES]

4 of them on a 250 would be pretty cool Tiny
Bones

[internetscooter]

I should point out a few things I guess

Firstly thanks Tom at http://www.bulletcars.com/ for sorting me out with a "salt deal".

This thing (C8-8) is so new that it doesn't even come with pulleys. I think I am the first person in the world to have one of these and try and do something with it!

Even though it is tiny, it is spec'd as Max Supercharged HP 41-75hp. I'm going to start off at the low end and work my way up So it should give me lots of scope for future records. For 2014 I am aiming just to bump up power at peak RPM a bit so I hit the tops speed I can do at 10000rpm (when my tyres run out of speed rating i.e. 111.8mph).

It also allows me to play with pulley ratios on the day - since I don't have a chain I can't adjust gear ratio, so I have to adjust peak power So the plan is start at 100mph and work my way up till she blows

[ChrisACT]

I like where this is heading, Paul.

It will be glorious.

[jpbyron]

How is the build going?

JP

[internetscooter]

My lathe stopped working so I am waiting on a replacement part (next week) - that has stalled the pulley fabrication

While waiting I have been concentrating on the 3D modelling. Just a few minutes ago I wrote a software tool which will finish off the engine to make it suitable for computer simulations (turns a mesh full of holes into a watertight lump). This is the last bit of the puzzle, after hundreds of hours mesh fixing, so next week expect some updates on CFD at least

[internetscooter]

A minor update:

First step was to create a tool that mimics the Rotrex pulley adapter. This is so that I can have the pulleys I am making mounted in the lathe in the same way it would be mounted on the supercharger. The idea being that I can set up the pulley perfectly aligned in the chuck and the resulting poly-v grooves should be perfectly aligned also.

I made this with a combination of the CNC mill (for holes) and the lathe.

[gennyshovel]

Get into it Paul, less than 6 months left
Tiny

[internetscooter]

Get into it Paul, less than 6 months left
Tiny

That's the beauty of all this geeky computery stuff I am doing - it takes a lot of upfront effort to get things working but when it does work things go pretty quick

Here's were I am now at as of 7:30pm - I will next test the holes drill ok automatically with the CNC on the test pulley (the small one) then I can bang out the rest

[dplecko]

Very much like the CNC.

2 cents worth on the pulleys, quite a big guide on either side of the pulley will help with crank flex, engine/bracket vibration, TDC acceleration, rev limiter and backfire. Even with the 3rd crank bearing I have belt marks in places that can't be explained!