Oil squirt rod notch ala VW-Porsche

Oil squirt rod notch ala VW-Porsche Ain't really a post about rods and Norton rod holes are useless mistakes to cover up.

A way to aim oil at piston w/o holes in the rod or extra oil tubes or extra oil to empty or windage fling. Of course Norton pistons aren't laid horizontal, but then again...

Oil flung off a 4 inch stroke crank turning 6,000 rpm is moving about 180 mph and has a velocity head equivalent to about 300 psi. It's not concentrated like a pinhole leak or nozzle. Also note that paint holds up just fine inside an engine.

Click to expand...

On the other hand it takes like a pint of oil a minute to lower piston temps 100'F so is Norton pump even able?

[video]http://www.youtube.com/watch?v=7wuNuuEoN7Y[/video]

http://www.cp-carrillo.com/Tech/RodTech ... fault.aspx
BE Oil Squirters
This oil hole in the Big End neck allows pressure fed oil to squirt up to the piston and rod Pin End for additional cooling and improved lubrication. This option can be considered for engines without oil squirters.


http://www.isuzuperformance.com/bills/engrods.html
Pauter will not drill oil sprayers in the rod similar to those found in the 90-91 1.6 liter DOHC Non-turbo engine. The squirter hole weakens the rod. Pauter offers two alternatives: They will slot the cheek of the connecting rod end at no extra charge so that it will spray similarly to the sprayer in the OEM rod. OR For an additional charge indicated below, they can center drill the rod so that it will feed oil from the con rod bearing to the piston wrist pin, which both lubricates the wrist pin as well as spraying the bottom of the piston.

Piston oil jet rods for everyone

Can't tell ya the times of tracking down what's done for 2 hp per cubic inch engines, especially air coolled, sustaining hi rpm on reasonable octane gasoline and then boosted to boot, with remark that w/o oil jets could not happen. If ya want to make oil coolers really earn their keep how could ya resist this? Norton Squirter hole 2 shoot per revoulution is old fashioned squirt gun compare to dual mini gun hosers. Oil can only strike underside on down strokes. My hard use mower rods has 3 pairs of these aimeed at various vitals above oil level so apparently plenty of oil to spare. Chain saw files have more cycle uses almost than my hair dryer does.

[video]https://www.youtube.com/watch?v=7wuNuuEoN7Y[/video]

http://www.thesamba.com/vw/forum/archiv ... 027--.html

What has this thread to do with Norton Commandos?

needing said:

What has this thread to do with Norton Commandos?

Click to expand...

Seems to me that the op is looking to explore the possibility of doing something similar in the way of directing oil to the underneath side of the pistons in the norton heavy twin air cooled engine used in commando line of motorcycles in an effort to cool down the operating temps.

what exactly is wrong with the Commando operating temperatures so that they need discussion of being cooled more?


It was July of 1972 when I packed my tent and sleeping bag, some tools and a change of underwear(not needed - turned inside out 15 times) on my Combat Commando and took off for a 5000 mile ride across the US plains to the Pacific coast, down to Mexico and back home via Death Valley.

Havoline 40 was the recommended oil weight and of course neither oil filter nor oil cooler were fitted to my bike.
And of course my owner's manual said to change oil every 5000 miles and so the entire trip was on the same oil.

Not gonna go into detail, just want to say that my stock Combat with its 19 tooth sprocket was held at a steady 70-75mph (4700rpm) for literally hour after hour all day long in temps often exceeding 100 degrees, including a late evening ride across Death Valley at 110 degrees.

And guess what?


NOTHING HAPPENED, the motor did not blow up, I had the best summer of my young 20 year old life on my Norton

the point being, I do not understand WHY there is angst about the NEED to cool the Commando motor?

what exactly is wrong with it in its present, able to cross the United States in very high temps, condition with NO oil cooler?

Remember, Hobot is building a high hp supercharged motor. Cooling will definitely be a concern. I also enjoyed learning the technique of grooving the rod to make oil squirters. New to me.

Jaydee

Ta.

Ta.

[video]https://www.youtube.com/watch?v=uMnFbsy0Hgg[/video]

Not quite the same thing, but didn’t Norton in the 1970s, try something similar on their Commando engines by drilling a small hole in the con rod & big end shell for a while :?:
They later recommended that the shell should be fitted with the undrilled part blocking off the hole in the con rod :!:

Nope, Norton rod holes were only done to try to solve seizures by more lube to pin nothing to do with coolling so are as functional as the wart like things seen a couple feet up horses legs that are left over remains of a useless toe. Norton found bad bacth of pistons as reason but kept the rod hole for some unlogical reason. Look at the animation to see it lists 5.1 liters a min flow but can exceed 3 gal/min in boosted race engines. Japanese study showed in our size pistons it take .6 l/min to cool crown 100' F, so may never be practical-useful in Commandos.

"Might not be practical" ??? Hobart since when has anything about a high HP Supercharged Norton been "practical"???