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The first attempt
to see if the GTP30 was going to fit. The image
shows the engine before modifications were made to a
couple of panels, hence the engine is still a little
high.
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A supporting
frame was made from scratch and utilises four shock mounts
to reduce any knocks to the engine, there is a little
more to be done here, but essentially the frame is now
finished. |
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Another view of the GTP30 mounted
in to it's new frame.
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This picture shows the engine installation
from the rear of the car and you can see that the boot
will just about close without touching the plenum.
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Now to start the transmission, a
few phone calls were made to various people including
Stuart Mills, Lord Ant D'Bar
and Will Parry, all of whom have offered different solutions
on how the diff and motor mounts could be attached.
I decided that a MX5 differential coupled to four
72 volt DC PM motors using chain & sprockets is going
to offer
the
best solution,
the mounting has currently still not been decided upon.
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The differential situated in place,
this is one of those occasions where I pop in to the workshop
and just stare at the sub frame pondering different solutions,
so far I must have been looking at this for two to three
hours without deciding the best route to take. |
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The original 12 volt battery has
now been disposed of and replaced by a 22Ah cyclic battery,
obviously
there is no longer an engine for it to start, but it
will have to deal with additions like a vacuum pump for
the brakes and possibly an electric demister for the
windscreen, I have added an extra fuse inline for extra
protection.
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To act as a buffer for the drive
motors and to significantly aid the acceleration from
standstill I
am going to use
50 4.5Ah cyclic battery's in the configuration of 2 X
25, thus 2 strings of 300 volts. Thanks to Chris at Manbat
Shrewsbury for a great deal! |
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For storing the batteries I have
had two aluminium style 'brief cases' fabricated,
designed for strength due to the weight, they will each
contain 24 batteries, the 25th battery will be mounted
somewhere near the cases under the bonnet.
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This image shows the battery's in
place, a 3mm layer of Teflon will insulate the battery
terminals from the lid. |
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One complete 288volt battery pack.
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This shows the battery packs in
place, I have yet to devise a way of safely securing
them to the car, also the
anderson style connectors have yet to be attached to
the cases.
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The MX5 Differential has now had
it's rubber mounting lugs cut off and two M12 holes drilled
in to the Tee part of the Diff, two 22mm steel spacers
are used to space the Diff from the mounting supports which
are welded on to 40mm square box, the box section is
then bolted to the sub frame using the original engine mounting
holes.
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Also the drive shafts from
the MX5 and the MGF have now been cut to size and a suitable
joining collar will be made to join the two together. |
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I have also started to strip, wire
brush and replace worn joints and corroded nuts and bolts,
at this
stage I have not bothered to give them a lick of paint
as next winter tinker time I intend to replace the front
and rear sub frames with MGTF sub frames that utilise
Coil rather than Hydragas suspension. |
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MGF
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