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A Special Builder's Notes

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The Special Builder's Breakfast Club

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01 October 2022

A Week Of Firsts.

On the way back from the Goodwood Revival, Leon noticed a grinding noise coming from one of the front wheels of his A7 Special.

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This is how it should look...

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This is how it shouldn't - I've never seen that before. Awkward and Co raced to the rescue - a 300-mile round trip - taking with them a spare hub. Obviously, removing the broken hub was a bit of a poser as the extractor thread wasn't there anymore.

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Bolting the spare hub to the back plate did the trick and Leon was soon on his way again.

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I'd been pondering the size of the steering wheel for a while; the Riley one was too big and the one I made for 'Sunita', my A7 Special, was too small. The middle size was perfect - a rim's width smaller and larger, respectively.

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The Gods were smiling on me when I undertook to wrestle with the pipe bender to create the heater pipes. I got the top one right first go!

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The lower and shorter pipe was more of a fight. It's alright for now, but I think I may have to have another go at it - I have a suspicion that I've cut the bend a bit short, and a jubilee might not grip as well as it should.

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The battle continued as I started assembling the plug leads to the coil block. I remembered that I had some silicon spray that made the process a lot easier. The real difficulty was working out which lead went where. The coil pack fires in pairs - from top to bottom, A, B, and C. With a firing order of 1-5-3-6-2-4, I needed to work out the order for which pairs of pistons were at the top of their travel together - there's a wasted spark so it wasn't necessary to establish TDC on the firing stroke. Fortunately, I had a spare crank in the stores dept, and was able to determine the sequence of events.

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Making the floor supports was a job I could no longer put off.

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The best way of attaching them to the cross tube took a bit of thunking, but I found a piece of tube of identical diameter and created a saddle for the vertical plate to sit on. A 1" square tube bolted to a handily placed bracket at the rear of the gearbox, completed the floor's subframes.

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There's some tweaking to do - probably not for the last time.

previous post Zlin & Palavsky
next post Happy With That.

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