My 1st Knuckle

[Dragstews]

Under the fitting is a carb jet that been drilled to .060 ....

It's a little work to thread the cam cover for the jet, easier way is to solder the fitting close and drill a hole ....

[47str8leg]

Did that on mine and it was nowhere near restrictive enough. I know it works when you put on a lower pressure pan or shovel pump.
Any way of controlling pressure at the pump itself ?

[Dragstews]

Not a good idea cause that feed port also feeds oil to the pinion shaft ..
The restrictor should be installed after the oil goes to the shaft in route to the top-end ...

The biggest plus (Among others) for running the S&S pump is it's ability to get oil out of the motor and back to the tank ....



Don't look all that bad hanging on there too....

[Bbqbiker]

Ya killin me with all this Knuckle Porn.....I was planning on just scraping up a few dollars for a stock rebuild....this is insanity....

[Dragstews]

I was planning on just scraping up a few dollars for a stock rebuild....this is insanity....

Better keep your distance from Twinkies and M8's in that case....

[Tattooo]

Ya killin me with all this Knuckle Porn.....I was planning on just scraping up a few dollars for a stock rebuild....this is insanity....

Yep listen to Drag..... If you do like you say it would be a damn shame to trash another part of history....

[Dragstews]

Yeah .... And don't mess around with the 305cc Superhawk's too ..!!!
(They will clean your plow..)

Unless you wanta ..... .../// https://youtu.be/NwDyywRreP8 \\\....

[47str8leg]

Not a good idea cause that feed port also feeds oil to the pinion shaft ..
The restrictor should be installed after the oil goes to the shaft in route to the top-end ...

The biggest plus (Among others) for running the S&S pump is it's ability to get oil out of the motor and back to the tank ....

[ATTACH=CONFIG]77046[/ATTACH]

Don't look all that bad hanging on there too....

That's true about returning the oil but the oil from the top end gets sucked down the pushrod tubes to the motor. The OEM shafts drop the oil out over the on the exhaust side and then it pools back toward the pushrod tubes to be sucked down. That's all twinkle when you have 7 lbs of pressure. I could easily be wrong on this , but I thought that those oil pumps produce about 22lbs . One of the corrections on my motor was to replace the oem shafts with V-twins ( yuk , I know ).
However the reason behind this move was because the v-twin shafts dumped the oil out closer to the pushrod tubes allowing it not to pool so much on the top end .
I however, have kept my old shafts and am looking for a stock pump or pan- shovel pump where that inline restrictor will work just fine by itself.

[Dragstews]

S&S offers a breather gear that reduces oil leaks from valve spring buckets with the high evacuation gear...
Elongated vacuum hole increases duration of suction on oil return suction passage, doubling oil return from the top end...

That allows more oil to be drawn from the tins and returned to the gearcase and ultimately to the oil tank.
Getting more oil out of the tins reduces one of the most common problems with knuckle engines - Leaky Tins...

On the oil pump:
S&S pumps deliver 33% more oil than the original cast iron pump.
Oil pressure is dialable ...

Photo below is an Knuck S&S breather gear that I installed a Don Hotop air ramp in....

[Dragstews]

....I was planning on just scraping up a few dollars for a stock rebuild....this is insanity....

Back to the baby stroke of 4-1/2" are we ...???

Just food for thought here ....

The photo of the Knuck that I posted is a 1940 EL .... The stroke is stock (3-1/2") but the OG flywheels was pure rust so I attained a new set from T&O (Stock stroke) .... Did a shave job on the left wheel and installed a set of China H-Beams with a new bore job at .060" over on the OG jugs ....



Kinda did a a little beefing up the crank by having the wheels made with the larger FL crankpin instead of the step crankpin that was used on all the EL's and UL's ....

A new left side crankcase also went into the job, because of all the welds that the OG case had from past repairs...



Owner's comment was .... "This is the smoothest running Harley I ever rode."

Did do a, over the top, balance job with matching of the recip. weights....
________________________________________

[Bbqbiker]

Well here it is early June and I spoke with Knuckle Jesus and he says drop off my motor in October.....so that means I'll have a fresh motor this time next year...sigh....the guys good and the line is long.

[Tattooo]

the guys good and the line is long.

He might be good but he is slow.....

[ncmc47]

If your stock breather is good, all you have to do is pull the screen.

[Dragstews]

You can modify your stock gear to the S&S improved specs... But I gotta tell ya that gear is harder than a three day old biscuit to work....



But ....

Another plus about using the S&S gear over the Oem gear is the built in open timing that the gear window has....
With running that gear, not much need to work the case window to max out the open & closing breather timing... Only to square up the case window to the gear window....

[nuklhd]

I had mother mary panhead do my motor. I bet they know each other.