24 July
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IVA yesterday. Quite an experience! A relatively small number of
issues raised, requiring a retest already booked for September. Good news is
that brakes, lights, interior and exterior projections all passed OK, the
exhaust was quiet, just 86dB. Minor issues were that the connection to the
rear fog light had come adrift, the washer bottle wasn’t properly locating in
its holder, and some locknuts are required to augment the steering rack and
front suspension attachment. A nearside mirror is required as the interior
mirror was judged too small for an adequate field of view.
Slightly more tricky, the Panhard rod fouled the diff cover plate. I
hadn’t noticed this, and think it was only evident because I had a full tank
of fuel for the first time. Should be able to resolve this with some
additional spacers, but clearance is tight between cover plate and spare
wheel well.
I’d fitted the MX-5 seats and looped the seatbelt through the guides
on the shoulder of the seats. This meant that the seat belt runner was higher
than the mounting point, which means the seat is in compression in the event
of an accident, which it wasn’t designed for and is unacceptable. I think if
I remove the belt runner from the seat, or just swap them over, and remove
the subframe I’ve used between seat and floor, I can make it acceptable.
Needing a bit more headscratching – the rear wheel arches don’t quite
cover the tyre as they should, which requires some ingenuity to attach some
sort of narrow mudflap over the rear section of the arch.
The front brake flexible hoses are stretched on full lock – despite
having been supplied specifically as MGB upgrade items. I think I need hoses
about 50mm longer.
All this should be able to be sorted out in time for the booked
retest on 8th September.
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02 August
|
I’ve dealt with the more minor issues from the IVA test – steering
and suspension bolts passing through the threaded plates supplied by Gerry
now have locknuts, with some thread protruding. I’ve raised the position of
the wash bottle so it no longer fouls the chassis, and secured it to the
bracket with a cable tie. A connector had pulled off the foglight wiring,
which I’ve re-soldered and checked.
I’ve fitted the nearside mirror, and raised the position of the
offside mirror so the rear view isn’t obscured by the rear wing (an
unrecorded comment from the inspector). I’ve obtained some longer front brake
flexible hoses which weather permitting I’ll fit tomorrow.
That leaves a couple of issues over which I’ve exchanged some
correspondence with Gerry: I’ve given the Panhard rod some clearance from the
diff cover by fitting a half-inch spacer and longer bolt at the axle end of
the connection. The clearance loaded is now around a quarter-inch, which
should be OK even down to the bumpstops. Gerry was surprised and queried
correct fitment, he’s only occasionally had to use a single spacer washer.
Gerry was also surprised about the rear wheel arches – this point
doesn’t seem to have arisen before. However, I have the correct wire wheel
axle, adapter hubs, and the wheels and tyres supplied by Gerry. The track
(which is easy to measure on the trailer) is the same as that quoted for the
MGB. The photograph shows a cardboard extension fixed in place to show the
extent of the non-compliance – which is a maximum of 15mm.
After some deliberation I decided against progressing with the Mk.3
MX-5 seats. I felt their size might mean the seat belt still rubbed on the
seat even if the guides were reversed or removed. I’ve got hold of a couple
of early MX-5 seats in good condition that will fit more easily, without
modification except to remove the adjustable runners, and with more room
around the belts. The seats are smaller, with adjustable headrests. I’ve made
a gauge to check the compliance with the IVA manual, for both minimum height
and distance to seat belt anchorage. On both counts the measurement seems
comfortably within the criteria. If the sun keeps shining today I should get
them both fixed in.
While fitting seats seems a simple job, the length of time required
to do it properly shouldn’t be underestimated. Due to the location of chassis
members the attachment bolts can’t always be fitted to correspond with the
seat tappings, so some form of subframe is usually required which needs to be
sufficiently robust. Although the seats in the Hawk don’t transmit the
seatbelt loads, it’s surprising how much load does pass through the seat
attachment – just try braking hard without the bolts in place!
The omission of the adjustable runners isn’t an issue for me. The
Hawk isn’t designed to fit large people, and while I’m not tall I need the
seat as far back as it will go.
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03 August
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Fitting the seats:
This took much of the day, but the seats are securely fitted and
appear to be IVA compliant. The seat belts fit without rubbing the seats. I
took some measurements to compare with IVA requirements:
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11 August
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New front brake hoses are fitted. I’ve got some ideas for adapting the
fluid reservoir for pressure bleeding, which is my preferred method, so I’ll sort
this in the next week or two. Made and fitted the wheelguards required for the
IVA. They’re quite rigid and don’t look too bad.
That’s all the failure points
addressed now.
|
Monday, 11 August 2014
IVA - first attempt!
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