Needed: 259 Oil Filter Restricter fittings

[n/a]

Jim Maxey, Jr in SB is busy at work on my 61 lark engine, and I'm going to have him put an oil filter on it, does anyone have the restricter little brass fittings that are used on a partial flow system?

(beileve it or not, all my 259's around here never had
a filter on them except my lark that burned)
Kent Fedor

(P.S. Ted Harbit was right - Jim when he tore down the engine, said the main
bearings were chewed up and the crank is beyond grinding)

[2R5]

If your in the South bend area why don't you go see Tom Karkiewicz 574-287-5834 I'm sure he would be able to fix you up .

[garyash]

https://www.studegarage.com

[Dwain G.]

The .060" brass fitting might work okay for you. Just be certain you know what the hot running oil pressure was before the installation so you can tell if you have lost any pressure. The restrictor is supposed to be the same size as the by-pass hole in the oil pressure relief valve, or about .043"-.045". You can buy a blank fitting similar to the one shown and drill it to size.

Dwain G.

[Roscomacaw]

You could also silver solder a fitting and then drill it with the appropriate-sized drill.
I'll say it again even tho I've said it quite recently - be sure you have this restricted fitting on the input side of your partial flo filter.

Miscreant at large.

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe
1957 President 2-dr
1955 President State
1951 Champion Biz cpe
1963 Daytona project FS

[garyash]

Bob Palma replied to Kent's question, also posted at alt.autos.studebaker, and noted that this was covered in Turning Wheels, page 25, March 2001. The article called out a #50 drill for the hole, which is 0.070". The flow is going to go up approximately as the square of the hole diameter, so an orifice .070" should have about 2 quarts/miute flow at about 30 psig. The flow goes up about with the square root of pressure across the orifice, so a pressure of 40 psig only raises the flow by about 15% if we assume that the downstream pressure is pretty low. So, it looks like a pretty big hole should be OK and not cause too much oil pressure loss.

How much oil flow does an oil pump deliver, anyway? I assume that it's capable of a gallon or two a minute. Anyone got data?

Gary Ash
Dartmouth, MA
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard

https://www.studegarage.com

[Dwain G.]

I think the "#50 drill bit" is either a misprint or just plain incorrect. It first appeared in July 1976 Turning Wheels in reference to a 170 engine, and we've been stuck with it ever since. That Q & A also states "same as the oil relief valve piston which was drilled in to oil the timing gears."
In Service Bulletin #350 Studebaker has assigned a part number to the inlet pipe nipple. 1549669, and says it has a .0456" restriction.
But hey, if a .060" or .070" orifice doesn't lower the oil pressure any noticeable degree, then I wouldn't even worry about it.

Dwain G.

[garyash]

If I scale it, an orifice of 0.0456 would give about 1 quart a minute flow at 40 psi. Sounds about right. Looking at the drill size tables, a #56 drill is 0.0465. It was probably a misprint in the original article.

Gary Ash
Dartmouth, MA
'48 M5
'65 Wagonaire Commander
'63 Wagonaire Standard

https://www.studegarage.com

[BobPalma]

Dwain: Is it possible that a different restriction (hole size) was used for the newer partial flow, spin-on (i.e, Fram PB-50) filter versus the older canister-type, cartridge filters? Just a thought. I wish I had a few originals lying around here to go check, but I do not. [8D] BP

quote:Originally posted by Dwain G.

I think the "#50 drill bit" is either a misprint or just plain incorrect. It first appeared in July 1976 Turning Wheels in reference to a 170 engine, and we've been stuck with it ever since. That Q & A also states "same as the oil relief valve piston which was drilled in to oil the timing gears."
In Service Bulletin #350 Studebaker has assigned a part number to the inlet pipe nipple. 1549669, and says it has a .0456" restriction.
But hey, if a .060" or .070" orifice doesn't lower the oil pressure any noticeable degree, then I wouldn't even worry about it.

Dwain G.

BP

[n/a]

well thank goodness for Dennis and Sasco; I was able to get some NOS restrictor fittings from them for the spin on filter type.

Next Time I wander out in the garage I'll mesause the restrictor hole and get back with you guys,
Kent

[Swifster]

Does this mean the Lark has made the magic journey from Arizona to South Bend?

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Tom - Sterling Heights, MI

Ancient Chinese Proverb: "Injection is nice, but I'd rather be blown!"

1964 Studebaker Daytona - Laguna Blue, Original 4-Spd. Car, Power Steering, Disc Brakes, Bucket Seats, Tinted Glass, Climatizer Ventilation System, AM Radio (136,989 Miles)