PSI converted to HORSEPOWER

Sounds like you have a steady state dyno meant to pump oil or water. The readings you'll get are meant to indicate torque, which is then converted into HP by calculation.

Beyond that, it's tough to say. Who made the dyno and what size pump, etc.? Oil readings or water?

If you can post the maker of the dyno, maybe someone could help. As it is, there is no constant value from pressure to HP because of pump size variance.

If you have one that's meant to measure steam engines -- that's different. There is a fairly well agreed upon standard for those beasts to equate pressure to PSI.

How old is this dyno, and who made it?

Wild guess is that's the same M&W Gear in Illinois that made all kinds of parts for Farmalls. I've got one of their throttles on my H.

They're still in business, and have a toll free parts number -- 800-446-5158. You might be able to get a manual for the machine -- I think it's called a model p400 or p400a PTO dyno. Seems like you've got the pressure scale figured out, but I think the way you turn the valve is fairly important, along with the viscosity and temp of the oil you use -- so best to check what the factory manual says.

Good luck with the project -- sounds like a fun thing to have.

Are you gonna be at any Indiana tractor shows this summer??? The State Fair maybe??? Im re restoring my 1938 Unstyled Long Frame B if I get at it. I need it repainted, new better mainfold, re do the carb again, and go through the mag (want a high mag strength rotor) and install my JD Factory Spoke rear rounds. Im also building from scratch what I am gonna name my Deere Massey. It was a Massey Ferguson 7 to which I added a diff 8 HP engine, upped the gear ratio, added seatign for 6, roof, CD player, mirrors, lights, and whatever else I can hang onto it lol and then paint it JD Green and Yellow with some black and chrome add ons. I want it to ride around on at Tractor Shows and my mother who is 80 dont like to walk much, so I can haul her around when we camp and travel. My 18 yo daughter came to the shop yesterday and procalimed "Thats the most Redneck lookign thing I ever saw" However, I bet once its painted nice I bet her and her friend will be cruising on it when we go to the New York Expo in July lol. Are you gonna be there?? Im giving seminars Friday and Saturday and you can heckle me lol.

Take care my neighbor friend. Ol John T also in Indiana

I have GOT to see the machine that your daughter called,"Thats the most Redneck lookign thing I ever saw".....I'll expect a pic somewhere around here one the Green & Yellow have been applied! :)

We will be expecting you to post a picture of your redneck Deere Massey on here when the time comes, OK?

Stan (formerly from Indiana, and "I bleed Gold and Black")

We're all Purdue Ags in our family - Dad in '30, me in '60, younger brother in '66, baby brother in '71. With my farming backgroud up in Hamilton County and my Ag degree, I ended up working for the old Collins Radio Company (bought by Rockwell International 30 years ago) for 34 years. I guess even technical companies can appreciate a solid BS background (pun intended).

Stan

You got the idea with steady state pump dynos. If Watt's ponies had been turning big pump handles instead of lifting coal, the idea might seem more reasonable. The pump type dynos don't do well at widely varying RPM's and over time as you can't easily vary the pump's resistance to torque and the torque needed to turn it changes as oil or water heats and cools. They are at their best with tractor, boat, airplane engines that spent most of their time at constant RPM's. For car engines you'd want to use some type of brake dyno, like an eddy current machine.

I was down at a little tractor show in Nashville around the first of May. Met an old guy with an Oliver that had a killer paint job from around Bloomington way -- he does good work, but said that was the last tractor he was gonna paint unless somebody could get him a new set of lungs. You gonna take your Deere Massey to Portland or the State Fair? I'll probably make those shows. Doubt I'll get to New York - so you're gonna need to find somebody else to heckle. My Mom turns 82 in a few weeks, and she just got a knee replaced so she wouldn't click when she walked. Her plan is that we all go to Germany in the Fall to see the towns her mother and her Dad's father came from and visit some of the cousins again, so that will be our big trip for the year. Hey - there's cousin Otto over there -- a pompous and overbearing (ex Hitler youth) mechanical engineer retired from Daimler Benz. He'd make a great heckler for you - would tell you why any US machine doesn't measure up to his standards. One of our nicer cousins has a '56 Holder tractor: 1 cylinder 2 stroke Diesel engine. I'll see if I can get a picture riding that thing and hope to hook up and see your redneck special Deere Massey at a show around here this summer.

be well,

Steve

That's long term duty to show at the Fair, you need to be there for a week or more, yes?. Will be down there (it's close) so let's hook up. The email address here with the least amount of spam so I manage to catch most of the real emails is [email protected].

Steve