I was poking around Harley's website looking at the Pan America and related stuff. I came across the replacement spark plugs for it. Talk about a LONG reach spark plug, and I notice the ground strap doesn't extend over the bottom of the electrode like spark plugs normally do. Wonder what the advantage of that is?
You definitely would want to use some antiseize on those threads seeing there's so many of them...
Looks like they borrowed some technology from FORD Motor Company. Hope they don't do like FORD's and break off at the base and leave the threads in the heads about half the time.
Hope no one needs them right now. There out of stock.
I was poking around Harley's website looking at the Pan America and related stuff. I came across the replacement spark plugs for it. Talk about a LONG reach spark plug, and I notice the ground strap doesn't extend over the bottom of the electrode like spark plugs normally do. Wonder what the advantage of that is?
You definitely would want to use some antiseize on those threads seeing there's so many of them...
What exactly is a Pan-American? Is it a Sporty in a crotch rocket frame?
So another interesting tidbit looking it up. Their replacement battery pack for their electric bike is $7000 dollars. Bought the size of a cinder block. You can buy a block of iPhones cheaper then that.
Looks like they borrowed some technology from FORD Motor Company. Hope they don't do like FORD's and break off at the base and leave the threads in the heads about half the time.
Hope no one needs them right now. There out of stock.
The issue with the Ford plugs is that they are a two piece design. There is a threaded portion, and then a smooth portion that is a press fit piece that seizes to the heads and gets stuck. I don’t see that happening with these, as it’s just a longer threaded portion.
These long-threaded plugs solve a problem with DOHC engines with centrally mounted plugs. You can only go so far down the plug well with the spark plug wrench, to wit:
My car engine's spark plug has a comically long threaded section, but you can see why - it's structural.
These long-threaded plugs solve a problem with DOHC engines with centrally mounted plugs. You can only go so far down the plug well with the spark plug wrench, to wit:
My car engine's spark plug has a comically long threaded section, but you can see why - it's structural.
I beg to differ on structure. Your cutaway gives that first impression. But remember, as a whole, that's just a 360 in that mass.
Now I do agree a deep plug like that needs to be at minimum of 2 times the diameter for thread length. Which is typically what you see in aluminum.
They make extensions. And you do need quality rubber gripped sockets. And be gentle.
What got Ford in trouble was the plug poor design. It was so weak from the inside size , the only thing that comes out is the hex back from all those threads locked up on the V faces.
I beg to differ on structure. Your cutaway gives that first impression. But remember, as a whole, that's just a 360 in that mass.
Per NGK's description of their collaboration with AMG in designing the engine's plugs:
"NGK’s ILZKAR7A10 iridium spark plug has been chosen for OE fitment to the 365kW, 6.3-litre V8 power unit developed by AMG for use in high-performance derivatives of Mercedes models. In this case, the main requirement was for the slimmest possible spark plug with sufficient performance, in order to leave as much space as possible in the cylinder heads for both valves and coolant passages. To satisfy this need, NGK developed this new plug with a 12mm thread, but a 14mm hexagon and a slimmer ceramic insulator. The length remains 26.5mm."
08-21-2021, 04:52 PM
Revolution Max spark plug
with reality!?
