Stop in for a cup of coffee

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I just lined up a hotel in Saigon for the Super Bowl. It's streamed live at an Aussie owned bar across the street from my hotel. I'll go to SGN on 2/13 and stay overnight to wake early on 2/14 6:30 am to see the live game in the bar...Yup, probably be drinkin by 8...:lol:
 
MOPARMITCH said:
I just lined up a hotel in Saigon for the Super Bowl. It's streamed live at an Aussie owned bar across the street from my hotel. I'll go to SGN on 2/13 and stay overnight to wake early on 2/14 6:30 am to see the live game in the bar...Yup, probably be drinkin by 8...:lol:
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I could start drinkin' with ya, but I'm not skippin' breakfast till game time :lol:
 
360DartGT66 said:
I went down in the basement and took some measurements and made some oil pressure calculations.

The Melling M72HV I have has a pressure regulator plunger with a diameter of 0.622". That's a cross sectional area of 0.304 in2. The pressure relief opening opens when it is depressed 0.42".

The spring that's in the pump has a spring rate of 35 lbs/in so a spring compression of 0.42" corresponds to a spring force of 14.7 lbs.

14.7 lbs spring force divided by area 0.304 in2 means the oil pressure reaches 48 psi before the relief valve opens. Makes sense.

Now. To increase the oil pressure to 75 psi I would need to increase the spring force to 75 x 0.304 = 22.8 lbs.

This corresponds to a spring compression of 22.8/35 inches = 0.65". That's an increase of 0.23" or very close to 6 mm.

So by adding a 6 mm spacer, I should get 75 psi of oil pressure without buying an $8 kit from Summit and paying $11 in shipping.

Or. I could thread the hole and add a screw and a lock nut to get adjustable pressure. But that would be just showing off :lol:
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I have a few spare 72 psi springs....
 
Unconventional said:
I could start drinkin' with ya, but I'm not skippin' breakfast till game time :lol:
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Ya know. I was just thinkin. That game is in Cali, PST. Est is 3hrs ahead. Does that mean i need to be at the bar at 3:30 am instead of 6:30am....Hmmmm.....
 
MOPARMITCH said:
Ya know. I was just thinkin. That game is in Cali, PST. Est is 3hrs ahead. Does that mean i need to be at the bar at 3:30 am instead of 6:30am....Hmmmm.....
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Just looked it up. Cali is 15 hrs behind VN. So I catch a break. I can wake at 8am in VN on the 14th, and see the Superbowl at 9am...:thumbsup:
Edit::: No, cause I think the game comes on in Cali at 3:30 pm...Got it now...
 
Super Bowl halftime show looks like a go sit on the porch half hour
barf.jpg


barf.jpg
 
Well I couldn't sleep so went and scrolled through the last three pages of the Origins of Life scripture...Holly Crap!!
It's a combination of a whole lot of chit.
:lol::lol::lol:
 
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Mattax said:
Exactly.

and more pressure on cold oil doesn't always more flow to the top.
kindof like this
View attachment 1715857457

yea I like that analogy. LOL

If using large bearing clearances, then a high volume pump will better fill them.
Otherwise the high valume pump is just going to open the releif valve early.
Thats how I see it.
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Don't worry, I used to work with hydraulics. As in design hydraulic systems. I do realize that pressure only results from resistance to flow.

Maybe some back story is necessary. I want my 273 to rev to 7k and I want 70 psi at that rpm. But I don't want more than necessary and I don't want the pressure relief valve to open at stock oil pressure.

What I wanted to determine was whether I could use the stock spring to achieve this or whether getting a stiffer one was necessary. Turns out I should be able to get 70-75 psi from the pump using the stock spring. Looking at catalog data for a spring with the dimensions it has, maximum compression is 0.8" which is considerably more than the 0.65" that will give me roughly 75 psi. And even if the relief opening needs to be bigger to let all the oil out to maintain a stable pressure, 0.15" should be plenty. The relief groove isn't that wide.

The pump I have is a little worn on the face of the pump gears. I was considering getting it ground flat but I suspected I would need to grind the housing too, to get the clearings correct. Grinding the lid and gears flat should be easy enough as they are all flat but getting the housing up in a surface grinder and perfectly level would be more of a challenge so I ordered a new one from Rock Auto. It's at Ray's house as we speak.

So I can experiment with the one I have right now and if it's not in too poor shape to use after all, then I can sell the new one. I paid $73 plus another $14 I believe in shipping. Over here, it's $160 new.
 
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krazykuda said:
I have a few spare 72 psi springs....
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Well, that's interesting. You wouldn't happen to have the cap, too? I could probably weld up the hole I drilled to get it out (using your instructions, thank you very much) but a new one would look better, of course.
 
Morning, folks. Spent the last two hours cleaning out kitchen drawers and packing stuff in sealed containers to stop an infestation of meal bugs or whatever you might call them, I'm sure you know what I mean.

Good times.
 
360DartGT66 said:
Morning, folks. Spent the last two hours cleaning out kitchen drawers and packing stuff in sealed containers to stop an infestation of meal bugs or whatever you might call them, I'm sure you know what I mean.

Good times.
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That sucks, I have seen them but only while deployed to Diego Garcia. A lot of things on that coral atol are old or got there via a slow boat from somewhere. I was catching Skip Jack and Wahoo, decided to make Wahoo nuggets and bought some fish fry/breading from the little store there on the base, that breading moved on it's own. A guy said, Oh, you just pick those out.....NOT!
 
I tested fitted my chains on the tractor yesterday, problem! Not enough clearance on the rear inner fender well and they'll rub against the chassis. I thought I could remedy the situation by swapping the rear tires side to side by my style rims aren't offset the same way as what I'd seen on online video so I'm getting a quote for 1 inch spacers. Don't like using a spacer but have to run chains to plow the hill. Also asked for made in USA chains, only rears are, fronts are China, verified that was all available for front and that I didn't pay more for those (I did for the USA rear chains). $575 in all and can't use them yet.
 
The self-loader log truck showed up on Friday and got a full load of mostly alder logs from what the tree guy cleared out front. I guess they make veneer out of that, I didn't think I could sell it but he took it so I'll see, not expecting much money. Worked a deal with a guy who needs firewood and have been stacking a pile for him, he and his son will get that out of here. I should be left with 6 or 7 30ish foot logs that the truck couldn't fit plus a metric butt ton of branches.
 
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