Motor Sport engineering and custom components
Our involvement in UK motor sport is usually evident
in the Turnertech workshop; in the form of our supercharged Honda
drag bike, and also special components produced for kit car, rally
car and Formula Ford competitors.
The Turnertech drag bike prepares for launch at a test in 2007, 150bhp from 500cc and more to come! Based on a 1975 Honda twin very little of the original machine remains, with extensive redesign of the engine undertaken in our engineering workshop utilising the broad range of skills we have from CAD and machining to fabrication in steel, aluminium and fibre glass. Oh, and our rider is a Theoretical Physicist!
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One off oil pipe take of union to suit a Suzuki Hayabusa engined Fisher Fury race car. This was produced to take up less space than the existing fitting but with greater flow, whilst offering higher strength. |
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Produced overnight for a Formula Ford competitor, just days before
a crucial championship round at the Castle Coombe Circuit, this rear
suspension bearing support incorporates more material under the
retaining bolt heads.
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Designed to suit our Honda drag bike as a result of changes to
the cylinder block and cylinder head: This replacement engine cover
incorporates an external spin on oil filter, external oil feeds
to the cylinder head, offboard starter shaft and an access cover
for the clutch. Fabricated from several machined aluminium components,
precision TIG welded for minimum distortion.
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Shorrocks C75B supercharger drive shaft/flange. This flange is
a known problem component in the Shorrocks supercharger, especially
since most of the units are now at least 40 years old. This one
off replacement incorporates a number of subtle modifications to
help prevent premature failure.
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Early experiments with the Honda engine of our drag bike in normally
aspirated form, included raising the compression ratio dramatically
to take advantage of the high octane petrol allowed in this form
of racing. Special pistons were not readily available in the UK
so a pair where manufactured in house to our exact requirement,
with valve pockets finish machined after a trial assembly.
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As part of the ongoing development of our dragbike; the decision
was taken to supercharge. Also methanol fuel and an increase in
cylinder bore (to utilise commercially available forged pistons
for a larger Kawasaki), required that a new cylinder block be machined
from solid. Photo shows the finished item prior to installation
of the liners.
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A perennial problem with kit cars when utilising motorcycle engines,
is arranging a reverse gear. In kit car racing this is normally
mandatory. Common practice is to have an electric motor driving
a gear sandwiched between the prop shaft and differential. This
particular item is for a Fischer Fury, and incorporates a hardened
steel gear with lightweight aluminium centre designed to locate
prop shaft and gear in perfect alignment and thus retaining balance.
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In response to an enquiry from a racing Tiger Avon owner, we have
designed rear suspension uprights in aluminium. Currently under
development, these may be available off the shelf in 2005.
7/9/05 Due to a change of car this project is now shown for information only.
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Designed for a supercharged Honda Goldwing trike, this relief or
'blow off valve' was designed to meet a number of requirements.
The space available was very limited at 65 X 65 mm and it had to
be adjustable as the owner intends to "turn up the boost"
for occasional racing appearances, it would also be nice if it weighed
next to nothing!. The finished item achieved all these goals and
is only 60 X 43mm. The design also allows easy disassembly for cleaning
without upsetting the adjustment.
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