ClassicCar

Browniepetersen wrote:

Unless someone was being creative the fram filters were the same on all cars. And, as I recall the decals are also all the same. The sad part is that they are nice looking but not very effective. The filter about 33 percent of the oil in use.

I could be wrong on this, Brownie, but as I recall, it doesn't have to do with the filter, it's the way that it is hooked to the system, in that it doesn't actually cycle all of the oil through the filter.

kamzack wrote:

What's the correct color for the Fram cannister on the oil filter assembly.

Thanks in advance,

Kim

The Hudson filter is a by-pass unit, when the oil pressure check valve opens, which Hudson set at 35 pounds, then the extra oil is sent to the filter and returns to the crankcase, not to the oil system. If you have low oil pressure under 35 lbs, no oil is reaching the filter. Those that stretch the spring or add washers can stop oil from reaching the filter. Walt.

Rick-



It's lower than most people think, probably 'cause they are used to newer cars or hot V-8's, I guess. Hudson reccommended 35-38 lbs. of pressure at 35mph. Idling Pressure was at 20 lbs.

46HudsonPU wrote:

That being the case, then oil just about never goes through the filter, if the bypass won't kick-in until it is above 35 lbs...

I have a filter kit to install on a pre-stepdown engine, but don't see any bypass with it. I am assuming that it doesn't have one, and that all oil would flow through it. I don't intend to install it, as my concern is that it would impede the oil flow enough to cause friction issues, thereby ruining/destroying the engine...

I don't see the lack of filters on pre-stepdowns to be an issue, at least in this day and age - My 'Blue Goose' probably goes less than 500 miles before I change the oil anyway! Next time around, I'll most likely 'drop' and clean the pan as well...

I think dropping the pan would be wise, as a precaution. And, you're doing the right thing: change your oil often and keep it clean! 500 miles might be a little excessive, but it can't hurt, that's for sure.



As far as lack of oil filters on pre-stepdowns, I personally try not to "out-engineer" Hudson engineers. Even though their engineering was decades ago, they still know (knew?) more than I do. If it all goes back, the same way it was when it was new, why re-invent the wheel?



If you think about it, running a Hudson down the road in 2009 as compared to running it down the road just post-war, the only differences are: slightly different oil composition, slightly different gas composition and slightly dirtier ambient air. For the most part, the technology that served post-war vehicles still serves that same vehicle today.



I'm constantly impressed with Hudson engineering, and while I spend a good amount of time understanding the rationale, I do my best to not interfere with it, as much as reasonably possible.

46HudsonPU wrote:

I am assuming that you are referring to those Hudson engines with pressurized oil systems - The splasher engines don't have more than a few lbs of pressure to begin with.

Also - Stretching the spring or adding washers would seem to be counter-productive to having a filter - i.e., the filter would never serve its intended purpose...

What is the normal oil pressure of a 232, 262 or 308? When would oil actually flow through the filter- Just at 'cruise' RPM?

He stated his engine is a 232 so that's oil pressure. As I stated above, Hudson pressure engines is 35 pounds at 35 miles per hour. Read the manual, Walt.

ESSX28-1 wrote:

Is not the main difference the higher speeds we expect to be able to maintain for a long time on the now 'better" roads!!!

Dave-



I suppose that would depend upon what roads you are traveling on these days. I don't know what the roads are like in NZ, but here in the states, aside from the freeways, many of the state and US highways are basically unchanged from what they used to be. But you are right, our world moves so fast these days, people expect to drive as fast as they run their lives.

onerare39-



I'm going to go write that down, right now.

There is a picture page 3-12 figure 10 in the 51 Mechanical procedure manual that shows the oil passage from sump back to sump showing the pressure relief valve. Notice how the passages are drilled. When the valve is lifted of the seat the oil is sent to the filter. As pressure incresses the oil that the filter will handle still goes to it. Check out a Hudson filter and you will find a small hole drilled in the stand pipe that the bolt goes in to hold the cap on. Never measured the hole but it may be about 3/32 so thats all the oil going thrue the filter.