Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

MGB=MPG · 06-27-2012, 01:49 AM

i would like one of those dwyer instruments

Series 2-5000 | Minihelic® II Differential Pressure Gage | Dwyer Instruments
i see i can get a new 0-2 WC for 50$

When i was finished fooling with it in the Automobile it would be very nice on my air handler in the machine room.

this is where i am testing the DIY U Tube Manometer .

i tried inclined both 15 and 30 degrees, UNSAT there is some phenom does not allow the water in the tube to settle evenly ..i sould speculate about that but *why bother*
the vertical U-tube works like a charm measuring system pressure drop . it will be very handy there to assist in Filter Change decisions .
My system has been icing up lately and me and the HVAC tech been hassling about that .
Brand new trane 4ton with a 2 stage scroll compressor and a variable speed blower . when its in Eco-mode the scroll only runs at abt 66 % and the blower moves very little air. but when it ramps up i think it moves [or supposed to] 1800 CFM .HVAC Tech was blaming my coil ice up on my prefilters and filters. not the case i think and now i have a *proper * measuring device to substantiate my contention.
wit filter out and filter door open and the machine ramped up the pressure drop through the heat exchanger seemed excessive to me ,

i am told usual system design is 500 FPM on the filter Face and a pressure drop of .5 INH20 or WG.. im running twice that. even with the filter door standing open. ..

at any rate on to a portable one , i see theoretical dynamic pressure is 1 INH20 at 55 MPH , i sure can draw an inch on a card and hold the needle on *Double Nickle * I need a rider to read the card then ill run up to the next Even point ..78 MPH for 2 INH2o

If i get readings ill check the rest of the induction, especially pressure drop through my induction air filter ..
if i seem to get readings there ,
[not too awful accurate with a water U-tube. i cant draw lines on a card to .1 inch much less read them .
ill spring for the Dwyer
and record . if i can find a rider to read the gauge
ciao.

06-27-2012, 01:49 AM	#8 (permalink)
MGB=MPG Smooth Operator Join Date: Feb 2011 Location: dover tn Posts: 147 Old Yellar - '79 MGB Tourer Drop-Hood Coupé Sports Cars 90 day: 25.83 mpg (US) Old Brown Ford - '91 Ford Bronco Custom MAGNUM - '05 DODGE MAGNUM SXT Thanks: 9 Thanked 15 Times in 14 Posts	i would like one of those dwyer instruments Series 2-5000 \| Minihelic® II Differential Pressure Gage \| Dwyer Instruments i see i can get a new 0-2 WC for 50$ When i was finished fooling with it in the Automobile it would be very nice on my air handler in the machine room. this is where i am testing the DIY U Tube Manometer . i tried inclined both 15 and 30 degrees, UNSAT there is some phenom does not allow the water in the tube to settle evenly ..i sould speculate about that but why bother the vertical U-tube works like a charm measuring system pressure drop . it will be very handy there to assist in Filter Change decisions . My system has been icing up lately and me and the HVAC tech been hassling about that . Brand new trane 4ton with a 2 stage scroll compressor and a variable speed blower . when its in Eco-mode the scroll only runs at abt 66 % and the blower moves very little air. but when it ramps up i think it moves [or supposed to] 1800 CFM .HVAC Tech was blaming my coil ice up on my prefilters and filters. not the case i think and now i have a proper measuring device to substantiate my contention. wit filter out and filter door open and the machine ramped up the pressure drop through the heat exchanger seemed excessive to me , i am told usual system design is 500 FPM on the filter Face and a pressure drop of .5 INH20 or WG.. im running twice that. even with the filter door standing open. .. at any rate on to a portable one , i see theoretical dynamic pressure is 1 INH20 at 55 MPH , i sure can draw an inch on a card and hold the needle on Double Nickle I need a rider to read the card then ill run up to the next Even point ..78 MPH for 2 INH2o If i get readings ill check the rest of the induction, especially pressure drop through my induction air filter .. if i seem to get readings there , [not too awful accurate with a water U-tube. i cant draw lines on a card to .1 inch much less read them . ill spring for the Dwyer and record . if i can find a rider to read the gauge ciao.