RcTek : Information & Resources for the Model Car Racer

Serpent Veteq Fuel Tank Modification

During a 2001 race meeting in the UK at a circuit which has a banked corner, it was discovered that the Serpent Veteq was suffering from severe fuel starvation. This can be corrected by performing the simple and inexpensive modification submitted to us by John Russell.

Please note that the drawings below may not accurately represent the inside of a Veteq fuel tank.

The Problem

Serpent Veteq Fuel Tank Modification

Serpent Veteq Fuel Tank Modification

If you look inside the Veteq fuel tank you can see some projections like those shown in blue on the image to the left.

These are meant to act as a baffle to stop the fuel from escaping from the area around the fuel outlet pickup point.

These baffles are not high enough and the blue arrows in the image to the right show what is happening to the fuel.

The Solution

Serpent Veteq Fuel Tank Modification

Serpent Veteq Fuel Tank Modification

To cure this problem, all that is needed is a small piece of polycarbonate (Lexan®) plastic (shown in green) and a cable tie (shown in yellow).

Shown to the left is the piece of polycarbonate, which has had a hole cut in it and a bend put in one end (to make fitting easier).

Serpent Veteq Fuel Tank Modification

As shown in the diagrams above, the hole in the polycarbonate should be big enough to fit over the round plastic tube that holds the filter. It is fed in through the fuel cap opening and is held in place using the cable tie, which is first pulled just tight enough to allow it to be pushed into place with a screwdriver (or similar).

The image to the left shows a top view of the fuel tank with the polycarbonate cover fitted in place.

New Tank from Serpent

A new fuel tank was produced by Serpent to cure this problem, which I did hope would be supplied free of charge to current owners.

A Partial Cure

A possible partial cure to the fuel starvation problem has been found by putting a thin coating of silicone sealant between the engine mountings and side plates etc. before assembly. When the parts are then bolted together the transmission of vibration around the car is substantially reduced.

Summary

Although it had been noted that the engine in the Veteq seemed to be occasionally running lean, it took the forces generated by the banked curve to really identify the problem.

Many thanks to John Russell for submitting this tip.

Further Information

For further information regarding the rest of the Serpent range of model cars and accessories please visit the Serpent web site.

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© 2001, 2009 by Darren Burnhill