Project Racer - Friday February 17.02.2012th, XNUMX


At Pfeil Design in Austria, we are working hard on our racer so that the frame and all attachments are with us on Tuesday.
Then you have to go full throttle for 2 days so that the bullet is ready in time for the custom show in Ried and you can see it on site.
In the meantime we are making the final preparations so that the engine may go to the test bench on Monday :-)
So let's start with the last little things ...
The Grand Sport oil drain plugs are equipped with a magnet, which holds the resulting metallic abrasion, which reduces wear.
Unfortunately, there are no bores on the engine housing for the wire securing of the oil screws, which is mandatory on race tracks. In order to get a visually pleasing solution, Dennis makes a small retaining plate “just quickly”.

Quickly twirl the wire on it ...

If screws are secured with wire, one should always make sure that the wire is guided around the screw in such a way that the screw always has to "pull" on the wire if it wanted to loosen and the direction of pull of the safety wire does not favor loosening the screw.

Other important little things are added ...

Kickstarter and the bracket for the Clutch.

Here, too, something has to be reworked ...

Our engine also has to be ventilated, unfortunately the really large carburettors were sold out, so we are content with one Keihin, 38 Airstriker.

The Falc intake manifold that we use comes with its stuffer. The Polini seal for the membrane must therefore be adapted.

Fortunately, Polini supplies a suitable Falc stencil directly :-)

At the bottom left in the picture you can see the foot of the camera tripod.
That happens when the “photo studio” is actually the welding table ...

... further in the text.

Seal fits, mount suction.

Now that the suction device is installed, let's turn to the cylinder hood.

Direct suction, air-cooled Smallframe Cylinders have the disadvantage that the hot air flow is directed through the shape of the original cylinder hood directly onto the intake manifold.

This has 2 main effects:

1. The suction device becomes disproportionately warm, which in turn reduces its performance.

2. The hot air is blocked by the intake manifold, which can cause thermal problems.

So we have to edit the cylinder hood accordingly to ensure that the intake port remains as cool as possible and that the cooling air is still safely discharged.

The hood is first roughly trimmed and then brought back into shape with a heat gun. The hood has to be adapted to the cylinder again and again.

As soon as the shape fits, the holes for the cooling air are made.

When milling you should make absolutely sure that the milling cutter does not get too hot. Because the plastic cannot absorb the heat generated to the same extent as metal.

This is how it should work.

The last little thing for today is the cable box.


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