Made two of the jig parts for joining the insulator to the base of the spark plug
one more piece to go
one more piece to go
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Demon V8
- Thread starter michael-au
- Start date
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All the parts for making the spark plugs almost done, just waiting for the tap and die to arrive
then I can have a go at finishing them off
then I can have a go at finishing them off
I found that it was very easy to snag the finished electrode when threading the plug. The root diameter of the thread is pretty much the same as the OD of the electrode. I left that part round, threaded the plug, then finished machined the electrode end. Hope it works out OK with yours. Or maybe you've done it already and it wasn't an issue.
Cool fixture for bending the electrode!
Cool fixture for bending the electrode!
I did think of that and will leave them round until threaded
The plug in the photo is just a test one, I am waiting for 8-40 tap and die to arrive
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The 8-40 tap and Die finally arrived so I finished off the steel part of the plugs
Made a fixture to screw the plug base in to so that I could mill the tab, made life easier and didn't take long to do all the plugs
Once the Z height was set it was just a matter of screwing in the next plug and put it in the vice
Made a fixture to screw the plug base in to so that I could mill the tab, made life easier and didn't take long to do all the plugs
Once the Z height was set it was just a matter of screwing in the next plug and put it in the vice
ajoeiam
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Two different nozzles - - - please -- - why?
There are three different shaped inlet/outlets on the drawings
Made some new insulators, grooves a bit deeper than the first ones, look better
The insulator and the base are now swaged together
The insulator and the base are now swaged together
Glued in the electrode, Plugs are now complete
I ordered 1/2" x 1/2" square brass bar so I thought I would make the radiator tanks
Still have to make the filler neck
Still have to make the filler neck
I used a laser edge finder to line up on the mark to drill the hole for the water fitting
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Maybe you are new to engine making, but that isn't where the plugs go.
An extra valve cover with holes in it?
Maybe you are new to engine making, but that isn't where the plugs go.
An extra valve cover with holes in it?
Hmmm
I didn't think that it looked right at the time
, might have to have another look at the drawings 
