HarleyTechTalk

Is there anything i should be aware of with running a stock panhead bottom end with S&S panheads?

Quote from: Nick9900 on January 13, 2022, 07:44:12 AMIs there anything i should be aware of with running a stock panhead bottom end with S&S panheads?

What year stock panhead cases?
 

49 cases left and right side, I'm fairly certain ill need to modify to run external oiler?

The S&S panheads are set up with shovel cylinder bolt pattern IIRC.
They also have outside oilers.
I'm not sure if you can get them with plumber intake or oring intake.

Give them a call they have always been very helpful in the past.

My STD heads had the correct bolt pattern, intake, 3 5/8 bore to fit my '65.
Yours would be a little different I suspect.
 

From what I gather it would be all shovelhead cylinder and heads with "pan look". I'd have to change to external oiling. I'd prefer std heads. But I'm pretty sure their shutdown. I can't get any responses from their website or phone.

Unless you are stroking it, the Shovel cylinders will be fine. They return the oil from the top through a hole drilled down the side of the cylinder, this hole intersects with a hole drilled from the inside of the cylinder just below the ring travel.

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Please ignore the wierd bore job and the blue silicone in the holes, this was an old cylinder that was strictly for testing Shovel, Panhead, and Knuck cylinders on the flowbench. The silicone was there to prevent a possible airleak when testing.

no problem thank you for that, did find the cross hatch to be interesting  

Quote from: SP33DY on January 14, 2022, 09:06:25 AMUnless you are stroking it, the Shovel cylinders will be fine. They return the oil from the top through a hole drilled down the side of the cylinder, this hole intersects with a hole drilled from the inside of the cylinder just below the ring travel.

...

Panhead cylinders after ~1955 had the same hole in the cylinder for returning oil. I think they added that to help put a little more oil on the piston skirt.

-Craig

A couple of other things... The S&S p-series heads have shovelhead exhaust ports. You can't bolt up your panhead exhaust to them. Also, check the rocker arm ratio. I don't know if it is the 1.500:1 ratio (OEM panhead) or 1.420:1 ratio (OEM shovelhead).

-Craig

When I put STD heads on my pan back in 1999 I opted for the shovel head porting since it had 3 5/8" bore and stroked.  As stated the pan exhaust had to be modified, we cut back the pipes enough to weld shovel head exhaust flanges on them.  Thinking about it now perhaps we should have welded proper sized pipe to the shovel head exhaust flanges and slipped the pan exhaust pipes on to them. 

When my original cases cracked I replaced them with S&S Superstock cases to handle the larger bore and stroke.  I'm running outside oilers out of an opening in the cases between the oil pump and the rear cylinder, the original 1948 (?) cases do not have that opening but I think you can run the outside oil pipes from a "T" off the oil pump.

Im not sure i understand where to t off the pump at? I heard rumor you could go off the oil pressure gauge location but that is hear say. All wondered about modifying the cam plate to be similar to the old knuck's and do the oiler from there. Is either one a viable thought? My current exhaust is just some generic drag pipes so replacing them with shovel is no problem.

Oil pressure gauge location will work, it is toward the outside edge and may not look clean enough if that is a concern.  If you modify the cam plate you can buy a chrome pipe system that is designed for that, I think most part suppliers will have what you need.  On the oil pump, I think you can "T" off any fitting that has oil pressure, you don't want too much flow to the heads or you will have leaking pan gaskets.  The modified cam plate system is one pipe into two and is restricted flow to not flood the heads or rob the rest of the engine of it's needed flow.  I made my own pipe system using the knuck style pipe that I used to use to get the correct size pipe, I used brake line from the auto parts store that bends easily and a variety of fittings, it fits behind the push rod tubes and polishes up like copper but is a blend of metal.  Back when I was figuring out what I wanted I found several manufacturers on line, some were complicated and expensive and some were simple and cheap, most took the supply from a fitting on the oil pump although I can't remember which one now but I think it was on top of the pump.   

The STD web site is still active, might give them a call.
https://stddevelopment.com/index.php?option=com_content&view=article&id=14&Itemid=15