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+--- Thread: Homemade. TURBO BOOST / RPM Meter (/showthread.php?tid=2112)
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RE: Homemade. TURBO BOOST / RPM Meter - casioqv - 01-25-2011
(01-25-2011, 01:25 PM)olefejer Because i have him put one up for sale to me. so that i now have 2 pcs, to messure both forward and returnline.
He put one up for me, and it's on the way! $44.78 USD shipped to the USA. A good price, but not something I want to pay twice to get return line data.
Did you try to calibrate yours, or are you just going to go with the rough calibration estimates he provides?
I'm very excited about this- first I'll collect some hard data on how numerous variables affect fuel economy in these old diesel cars to see what I can easily change to improve it. Then I'll try using the sensor in an Arduino powered fully automated biodiesel reactor.
RE: Homemade. TURBO BOOST / RPM Meter - olefejer - 01-25-2011
(01-25-2011, 03:18 PM)casioqv Did you try to calibrate yours, or are you just going to go with the rough calibration estimates he provides?I have had it connected to the arduino, and run 1 liter true it, and i think i got 4844 counts/liter, so thats the startpoint, then i just going to mount it and then run the car from 3/4 to 1/2 tank then i have used almost exactly 20 liter and then adjust the constant.
I'm very excited about this- first I'll collect some hard data on how numerous variables affect fuel economy in these old diesel cars to see what I can easily change to improve it. Then I'll try using the sensor in an Audrino powered fully automated biodiesel reactor.
RE: Homemade. TURBO BOOST / RPM Meter - casioqv - 01-25-2011
I think you can get by with a single calibration constant using 2 sensors, because the difference in flow rates between max fuel/high rpm and light fuel/low rpm will be somewhat small given the nature of the high volume lift pump which returns most of the fuel it pumps.
Since I'm going to try for a single sensor system, I expect I'll need a non-linear calibration table to get accurate data at low flowrates. I think with such a table I can extend the flow range the sensor can accurately measure outside of the specs.
RE: Homemade. TURBO BOOST / RPM Meter - winmutt - 01-25-2011
You can measure after the lift pump and on the return line from the injectors.
RE: Homemade. TURBO BOOST / RPM Meter - muuris - 01-26-2011
(01-25-2011, 03:52 PM)casioqv Since I'm going to try for a single sensor system, I expect I'll need a non-linear calibration table to get accurate data at low flowrates.
Just curious, from what point of the fuel line are you going to measure with a single sensor?
(01-25-2011, 05:48 PM)winmutt You can measure after the lift pump and on the return line from the injectors.You mean the return line to the tank from the filter, right? At least on my W124 fuel filter housing there is a bit of circulation from the filter to the return line directly, so measuring from the fuel line coming from the injectors wouldn't give accurate values.
RE: Homemade. TURBO BOOST / RPM Meter - casioqv - 01-26-2011
(01-26-2011, 02:04 PM)muuris Just curious, from what point of the fuel line are you going to measure with a single sensor?
I'm planning to loop the return line (to the tank) back into the suction line (before the lift pump). The sensor will be installed in the suction line (from the tank) before the return line T's into it, so it will only measure actual fuel used.
Looping the return back into the suction line doesn't really cause any problems except you lose the ability for the engine to automatically bleed air out of the system (say after running out of fuel or replacing the fuel filter).
RE: Homemade. TURBO BOOST / RPM Meter - muuris - 01-27-2011
Didn't thought of that as an option. As I live in a cold country, I like the circulation to keep the fuel tank a bit warmer.
RE: Homemade. TURBO BOOST / RPM Meter - winmutt - 01-27-2011
(01-26-2011, 07:47 PM)casioqvThis is how the om314 is setup. Return loops back into feed line.(01-26-2011, 02:04 PM)muuris Just curious, from what point of the fuel line are you going to measure with a single sensor?
I'm planning to loop the return line (to the tank) back into the suction line (before the lift pump). The sensor will be installed in the suction line (from the tank) before the return line T's into it, so it will only measure actual fuel used.
Looping the return back into the suction line doesn't really cause any problems except you lose the ability for the engine to automatically bleed air out of the system (say after running out of fuel or replacing the fuel filter).
RE: Homemade. TURBO BOOST / RPM Meter - ForcedInduction - 01-27-2011
(01-26-2011, 07:47 PM)casioqv Looping the return back into the suction line doesn't really cause any problems except you lose the ability for the engine to automatically bleed air out of the system (say after running out of fuel or replacing the fuel filter).
You also lose the ability for the fuel to cool the pump. If you're going to loop I suggest installing a single pass tranny cooler or small oil cooler (4", common on 10-25hp air cooled gas engines).
RE: Homemade. TURBO BOOST / RPM Meter - casioqv - 01-27-2011
(01-27-2011, 05:18 PM)ForcedInduction You also lose the ability for the fuel to cool the pump. If you're going to loop I suggest installing a single pass tranny cooler or small oil cooler (4", common on 10-25hp air cooled gas engines).
I've been thinking about this a bit- it would be easy to add, but I'm fairly certain that it won't present any problem in practice. The WVO guys loop back their systems to help keep the injected fuel warmer, but even that alone isn't sufficient to get the fuel hot enough for their purposes. You also have the fuel being totally replaced frequently, given the small recirculating volume.
I kinda doubt the inline type pumps are cooled much by fuel anyway- they're already bolted directly to the block, and full of engine oil. If this were an issue it would be a bigger one for engines with rotary-type injection pumps.
Although I'm actually planning to install this first on my Volvo diesel, which does have a rotary pump.
I'll keep an eye on the injector pump temp with my infrared thermometer but I can't imagine it will be an issue.
RE: Homemade. TURBO BOOST / RPM Meter - Spaceraver - 02-16-2011
Ole, I was suggested on the arduino channel on freenode that you should add some IF debug with a ground pin.
And could you comment some more on your code? Danish is fine, i'm translating as I go over it.
RE: Homemade. TURBO BOOST / RPM Meter - olefejer - 07-09-2011
Just mounted a new LCD in my car, i wisch it was possible to get it in same color as the radio and so on
RE: Homemade. TURBO BOOST / RPM Meter - dieselboy - 07-09-2011
Sweet!
RE: Homemade. TURBO BOOST / RPM Meter - randomdude - 07-11-2011
VERY cool!
casioqv- you said "I'm very excited about this- first I'll collect some hard data on how numerous variables affect fuel economy in these old diesel cars to see what I can easily change to improve it."
did you ever make any progress with that? i'm looking for some places to bump up my mpg.
RE: Homemade. TURBO BOOST / RPM Meter - winmutt - 07-18-2011
Very nice install. With any luck I will have mine up in the next 2 months, been waiting for new turbo/manifolds to install it.
RE: Homemade. TURBO BOOST / RPM Meter - jeemu - 07-18-2011
Is that too low for real time watch?
RE: Homemade. TURBO BOOST / RPM Meter - olefejer - 07-27-2011
(07-18-2011, 04:55 PM)jeemu Is that too low for real time watch?
Yes it is to low, you cant look at it while driving, but anyway cool to have all the info in one display, think i put a buzzer on it as an alarm. and set a max for all parameters.
RE: Homemade. TURBO BOOST / RPM Meter - iheartboost - 07-28-2011
this is awesome. im very impressed i would have no idea where to even start if i wanted to make my own gauge.
RE: Homemade. TURBO BOOST / RPM Meter - oldbeaver - 09-04-2013
(01-03-2011, 03:02 PM)olefejer Just got my homemade Boost and RPM meter to work.
I made it because i Want a very small meter to fit in the sunglasses compartment in the R129.
Here is a list of what part i used
Audrino Board
http://www.arduino.cc
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=280542822337&ssPageName=STRK:MEWNX:IT#ht_2847wt_905
LCD (importent is that it is serial, only takes 2 pin on the board.)
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=130447724258&ssPageName=STRK:MEWNX:IT
2 X "3 Bar boost/MAP sensor, Boost Pressure Map Sensor Apexi AVC-R HKS EVC-S Greddy
"
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120580140996&ssPageName=ADME:X:RTQ:GB:1123#ht_1701wt_905
Turbo RPM (HE351VE it need to have a sensor 2 wire)
The 2 Wire from the Turbo RPM sensor is attatched to Ground and the other to a digital input directly.
Then i messure the time it takes before the turbo has rotatet 100 times. by 90,000 RPM it took 66 mS. i the calculate the RPM 6000,000 / 66 = 90,000
Boost
The MapSensor is connectet to 2 X analog input 0.5 V is -1 bar, 4,5 V is 3 bar = 45 PSI.
And it also saves MAX EGP and Boost.
Motor RPM
Also working, same as Turbo RPM
I now also have a Fuel-flow sensor to give me instant MPG
Next project is to have one of the PWM output on the board control my vacuum valve witch is controlling the turbo.
Very nice, congrats! Interested in yr results, benefits of the kit. I need a instant mpg gauge, have you succeed on that?
Oldbeaver
RE: Homemade. TURBO BOOST / RPM Meter - olefejer - 09-07-2013
(09-04-2013, 08:27 PM)oldbeaver(01-03-2011, 03:02 PM)olefejer Just got my homemade Boost and RPM meter to work.
I made it because i Want a very small meter to fit in the sunglasses compartment in the R129.
Here is a list of what part i used
Audrino Board
http://www.arduino.cc
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=280542822337&ssPageName=STRK:MEWNX:IT#ht_2847wt_905
LCD (importent is that it is serial, only takes 2 pin on the board.)
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=130447724258&ssPageName=STRK:MEWNX:IT
2 X "3 Bar boost/MAP sensor, Boost Pressure Map Sensor Apexi AVC-R HKS EVC-S Greddy
"
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120580140996&ssPageName=ADME:X:RTQ:GB:1123#ht_1701wt_905
Turbo RPM (HE351VE it need to have a sensor 2 wire)
The 2 Wire from the Turbo RPM sensor is attatched to Ground and the other to a digital input directly.
Then i messure the time it takes before the turbo has rotatet 100 times. by 90,000 RPM it took 66 mS. i the calculate the RPM 6000,000 / 66 = 90,000
Boost
The MapSensor is connectet to 2 X analog input 0.5 V is -1 bar, 4,5 V is 3 bar = 45 PSI.
And it also saves MAX EGP and Boost.
Motor RPM
Also working, same as Turbo RPM
I now also have a Fuel-flow sensor to give me instant MPG
Next project is to have one of the PWM output on the board control my vacuum valve witch is controlling the turbo.
Very nice, congrats! Interested in yr results, benefits of the kit. I need a instant mpg gauge, have you succeed on that?
Oldbeaver
Hi the mpg gauge is crap, and not in the car anymore, as it is simply not accurate enough , you have to measure forward flow and return flow and subtract those to get Gallons / hour.
The only way.
I think to measure fuel usage on an old diesel, is to read rack position, and know fuel at that position, at that RPM. then it would be accuret.
On an CDI it is more easy you read the ontime on the injector and the rail pressure, then it can be calculatet from there.
At least thats how i think they do it.
but meassure width a cheap flow meassure device, not working
RE: Homemade. TURBO BOOST / RPM Meter - Crack - 09-08-2013
I've been watching the topic and think fantastic work done. Had had the same idea.
When monitoring intakes can do a good job. I do not know the car well, but if you can use the output of a sensor ABS, can the diameter of the tire and wheel to measure the displacement. With two flow sensors, one for power and one for the return able to measure consumption. Having consumption and displacement can calculate Liters / miles. The use of the ABS sensor, Hall sensor gives more toothed gear incredibly precise result.
With all the 3 sensors can do very good things is a matter of programming;
In my case I draw near to do Liters / KM, Instant consumption.
If you want to go beyond the sky is the limit if you use a level sensor in the fuel tank may make estimates and averages by supply.