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Special Branch |
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THE name Branch is synonymous with drag racing, father and engineer Dave campaigned an MGB car engined bike in the 70's and 80's. Now he is crew chief and builder of the 'Special Branch' Funny Bike ridden by his son, thatcher Shaun Branch. The thing that sets this Funny Bike apart from all others, certainly in Europe, is that it is supercharged and runs on methanol. For the spectator this makes it technically interesting, better still it sounds fantastic. Very noisy in an nasty, angry sort of way sums it up for me. |
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HAVING run a turbo Kawasaki Funny, the team planned to go
Top Fuel racing. A Sprintex supercharger was purchased and work began
on the crank before the project was abandoned and work began on Special
Branch. All engineering work was undertaken by Dave Branch Engineering
(DBE), including the very carefully thought out frame - a real work art.
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THE bike was ready to run in mid 1997 and by the end of the season had run a very encouraging 8.09 @ 166 mph. Bear in mind that having decided to be different to everyone else meant that finding someone to assist with tuning was very difficult. IT is so easy to glance at a bike like this in the pits and not appreciate
the immense amount of midnight oil burnt in its creation and running.
For example the mechanical fuel injection is by DBE using an Hilborn
pump. The system uses a throttle valve, and fuel bleed components by
DBE. These control the amount of fuel from the pressurised system that
is returned to the tank, and thus by implication the amount delivered
to the injector nozzles. WITH advice from a Top Methanol car team, among others, 2002 started with a new personal best of 7.81. As the year progressed it was pretty obvious from a spectators point of view that the bike was launching harder than in previous years, and this was borne out by a stunning 7.23 at the season closing National Finals. This despite a slight ignition problem! I can't envisage what it must be like to ride a bike like Special Branch, so I asked Shaun if he could explain; "Acceleration is a funny thing; the first time it scares you,
the second time you love it. FINALLY exciting news for 2003; a new 'Special Branch' will be under
development with a larger supercharger and reversed cylinder head, top
fuel style. |
Gauges ahead of cam cover are for air tank pressure and oil pressure. Oil temperature will be added for 2003.
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* OK I can't take them! |
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