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my research on this Lucas square motor color , 1958 thru 1968, does not agree with hammertone silver, hammertone grey, hammertone black, wrinkle black, flat black, etc.......... and I would ask to see a clear picture of a period of an original Lucas square motor, not an NOS spare part, taken from a ...

Hi CB, Yes these stem covers/protectors were standard equipment when using Borrani wire rims on any vehicle....Ferrari, Maserati, Lamborghini, ISO, and others....this had to do with the type of tubes available and wire wheels. These stem covers are quite visible in period photos. Stem covers were al...

The crankshaft is drilled to receive oil feed from the oil pump thru the main bearings. In turn, these mains feed and distribute oil under pressure, thru the crankshaft, to the rod big ends. Would the drilled passages in the crankshaft have any bearing on where the grooved/holed shell half is placed...

In reviewing the main bearing shell installation for a 330, I find the grooved shell insert installed in the lower cap rather than the upper crankcase. The loading takes place in the lower cap, so why are these grooved half shells reverse from normal engine design practice (groove in upper half)? Ma...

I wrote MPI and asked what stem TR? this stem cover kit was designed for? They replied TR13. TR13 being the standard, skinny stem found on most automotive tube today. Now that I look again, my only objection to this stem cover kit is the length of the tapered cover..........too long. But I think the...

Tom, this would be all three slots? on an S85A? Yikes!

Waymaster tube photo explaining tube stem I am identifying.
Are there other tube choices out there?
I have a 200mph Ebay tube on order with a TR13 stem for only $10.....just for trial fitting/fabricating stem cover with a TR13 stem.

It appears that the only metal stem tubes of any quality are produced by Waymaster. The Waymaster metal stem is longer than a vintage stem and a larger diameter in the root threads....so this requires a longer stem cover............and gives a slightly odd appearance, extended length, to this whole ...

here is a wheel that maybe can be identified, and appears using the MPI product, or maybe home made equal?

The tube stems, that these MPI covers are used on, are not clear to me.
TR13 doesn't look like they will fit.
So what tubes are used?

internet search turned up a source for tube stem covers, 250 era, at Motion Products.

the correct look, but looks too "hot rod billet" for my taste.
http://www.mpi-ferrari.com/html/wheels.html

What tube is being used in Borrani wheels for Ferrari applications? I don't find a stem protector type tube stem being offered any more, TR4 stem or such. I am guessing a TR13 stem would fit okay and would allow fabrication of false stem protector for visual correct....but what are the Ferrari on di...

Thanks CB, Less than 3 turns must be too few turns to hold adequately. I will check. These wheels are on Rudge 42 Borrani hubs. The design of the alloy wheel rim, with a recess machined in the tube stem hole, leads me to believe these Borrani wheels were designed with this cone sleeve to be used. I ...

some more pictorial data around the wheels.
There appears to be a manufacture date 9/65/
Is this date stamp a common find on Borrani rims?

Also these wheel tube stem systems seem to be most correct when used with <B> valve stem caps.
These caps are stamped MADE IN ITALY II <B>IIII.
The vertical striations might be tool holding marks