Q&A Forum
Hello everybody,
I am Jeroen from the Netherlands and own a workshop that has his specialty in VAG cars. I came across a MAHA LPS 13 Dyno and made an offer and I was the new owner. It is an old analoge Dyno but it have a TELMA CC 160 brake in it and it is nearly used. The paint on the rollers is still there. The bearings are okay and everything on the Dyno is still original. I asked MAHA Netherlands what it would cost to make it digital and they came with a price above 20k euros. So I went to google and soon I found this site and system from Jostein. That made me very happy 😊 I Don't have any experience with a Dyno but I did read a lot about it and now it is no high rocket science for me. I did much reading on this site but I have a lot of questions about the Electronics of te LPS 13. So maybe someone can help me out to find out what kind of eddy current control is originally used. Maybe I can use a piece of the original power supply. Otherwise I think I will buy the sportdevices power-supply. I think I need to replace the RPM sensors. They look to have a very fast signal. (much and smal teeth) I was wondering of the horsepower can be upgraded with software only or do I need a bigger brake? I read that some people measured over 500 horsepower with a TELMA CC 160. Original on the Dyno is 250 horsepower the maximum.
Sorry for my bad English. Google translate is my best friend at the moment 🤣 🤣
I will try to post a few photos of the Dyno on this topic.
greetings Jeroen
@six_shooter are we fighting over the same Maha dyno? Facebook marketplace in TN? If so I don’t want to step on your toes.
Definitely not, I'm nowhere near TN, let alone even in the same country. lol
I picked up a Maha dyno a couple weeks ago, a different one than I originally posted about in this thread.
So go grab that dyno if it will fit your needs.
@six_shooter are we fighting over the same Maha dyno? Facebook marketplace in TN? If so I don’t want to step on your toes.
I forgot to mention the ad says 150 HP rated, and I have found this video that shows a Maha emissions check dyno, which I suspect the one local to me was used for originally.
Any insight on this? Can it be modified to read upwards of 500 HP or so reliably?
https://www.youtube.com/watch?v=NOdfBAkmL0k
I have found a Maha dyno locally, and for a price I'm having a hard time not buying it for... even though I'm still working on setting up the Land & Sea in ground dyno with a friend of mine.
What sort of HP can this style dyno actually read? I'm thinking this Maha dual roller dyno might be good for a quick above ground install to be able to do steady state tuning, and can put off getting a water pump for the L&S dyno for the time being.
I don't have a model number, but looks similar to the Maha dyno shown in this thread, and what Maha shows as the FPS2700, that is rated to about 350 HP (260 kW), is that a limitation of the dyno construction, the brake or the load cell, because a load cell is easy to swap out, the brake not as easily. Would adding a heavy flywheel in parallel with the brake increase potential power readings?
Thanks for any insight.
Hello Volkswagenman
I have a sun ram XII and I want to upgrade to yourdyno, would you share your time and give me the configuration you have?
Have you managed to solve the problems with the original load cell?
Can it be used as the original at constant load or constant speed for fault diagnosis or carburation or ECU mapping?
Thanks
Gerard
Hallo Volkswagenman,
My name is Peter Paul from Holland and I just purchased the full set from YourDyno for my KLAM retarder CFK 300. I am building an engine dyno for classic car engines, specifically the Maserati 6-cilinder from 1960-1970. I would be interested to visit you and talk about how to connect. configure etc.
Alvast bedankt!
Mijn mail is ppdubuisson@gmail.com
PWS 3.3 can you controlled by YourDyno. Just set the output to Analog (jumper inside the box plus in software) and connect 0V and OutB out from YourDyno to the control input on PWS 3.3
Hi, I have similiar project like yours. I have sportdevices PWS 3.3. Can I ask how your install yourdyno with sportdevices pws?
This looks a good solution to me but the bar type is less work to make it work but I don't know if the bar type is lineair enough.
After change the method of calibrating te load cell I stil have problem with the HP numbers. Small cars up to 100 HP is no problem but when I have a car around 250HP there is about 30 HP difference. I use calibrated weights of 20KG but when I go above 80KG the I got a wight difference of more then 5KG on the software. I was wondering if the load cell of the MAHA is lineair enough for the yourdyno software. Does have MAHA a correction for this in their software or is the original load cell the problem? It is still the original one from the analog system that can measure 250HP max. I asked MAHA if they can sell me a new load cell from a LPS 3000 or MSR type dyno. What do you guys think about the solution? Or can I better make a bracket with the S type Loadcell or use the original Bar type from MAHA? in the picture the original Bar type load cell.
I tested your settings and reproduced the issue. There is a bug: When Ki = 0 the PID does not work.
Ki should not be 0, set it to something > 0 and the regulation works. 0.5 is a good starting point. I will fix the bug of course, but there is an easy workaround for now. I also recommend setting Kd to something low, like 0.05.
Thanks for reporting this!
The RPM signal in your picture does not look very stable, so it does not look like a suitable sensor.
When there is no RPM signal the output is 5 volt continious between ground and signal.
Today i had an idea. I have a RPM sensor for the CO tester that works with a pietso element. It is magnetic en you can put it on the engine and wil measure the frequency of the engine and calculate the RPM. I did some measurements with te scope on the signal output and i saw it is a 5 volt duty cycle signal. Is it possible to put that signal on the rpm input on the yourdyno box? What would be the suggention to connect it to eachother? On the output i have an 5volt signal to ground. And a earth connection. I would think:
earth to shield
ground to 0V
signal to signal.
But the RPM unit has his own power supply 12volts. When i put the ground together (rpm unit --> yourdyno box) it must be okay i think. Any suggestions? In the picture the output signal on the scope.