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Start run, predetermined start/settle rpm

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(@mjpower)
Posts: 34
Member
Topic starter
 

I have just built my self a water brake engine dyno.
I would very much want the start of the run to be more like superflow`s way.
At the start of the run it holds the set start rpm in a steady state untill "start" button is pressed. then it releases and does the sweep...

This would make the run much more repeatable i think.... now i had to use very long "wait" time to make sure it had stabilised the rpm before it started the run, sometimes the start time had timed out before i got he throttle fully opened and so on.... 

 

or is this allready an option?

 

Best regards Einar 

 
Posted : 13/04/2021 1:07 am
(@yhakan)
Posts: 27
Member
 
Posted by: @mjpower

I have just built my self a water brake engine dyno.
I would very much want the start of the run to be more like superflow`s way.
At the start of the run it holds the set start rpm in a steady state untill "start" button is pressed. then it releases and does the sweep...

This would make the run much more repeatable i think.... now i had to use very long "wait" time to make sure it had stabilised the rpm before it started the run, sometimes the start time had timed out before i got he throttle fully opened and so on.... 

 

or is this allready an option?

 

Best regards Einar 

Hi Einar, I have the same setup, homemade waterbrake and steppermotor to control watervalve and also have problems with the regulation of the sweep. How many seconds do you use to hold the rpm steady? And do you then during this time go to full trottle?

I have used the valve manually...for some time now but it would be great to let the "Dynobox" handle the acceleration and sweep.

BR Hakan

 
Posted : 13/04/2021 11:11 am
(@mjpower)
Posts: 34
Member
Topic starter
 

@yhakan
hi Hakan

its the same for me, stepper motor to controll water flow valve.

i used about 8 seconds settle time before sweep started. I have only used it for one engine yet. And yes i apply full throttle during this hold time..

My brake have quite high toeque capacity, so its no problem holding it down low...

i have here a video of me controlling the water flow manually, before i got the stepper motor.. 

i have now built myself a very nice dyno cell and controll room. Cant wait to start tuning in this... 

 

 
Posted : 13/04/2021 1:06 pm
(@boz-race-engines)
Posts: 112
Member
 

@mjpower that is cool as man,

 
Posted : 13/04/2021 5:42 pm
(@boz-race-engines)
Posts: 112
Member
 
Posted by: @mjpower

I have just built my self a water brake engine dyno.
I would very much want the start of the run to be more like superflow`s way.
At the start of the run it holds the set start rpm in a steady state untill "start" button is pressed. then it releases and does the sweep...

This would make the run much more repeatable i think.... now i had to use very long "wait" time to make sure it had stabilised the rpm before it started the run, sometimes the start time had timed out before i got he throttle fully opened and so on.... 

 

or is this allready an option?

 

Best regards Einar 

i think this would be a great idea and give more consistency to each run, allowing to hold the engine until steady then use something like a hot key to start the ramp up on a run 

 
Posted : 13/04/2021 5:50 pm
Dynoman01 reacted
(@mjpower)
Posts: 34
Member
Topic starter
 

@boz-race-engines

exactly 👍👍👍👍

 
Posted : 13/04/2021 7:26 pm
(@admin)
Posts: 1159
Member Admin
 

Yes, sounds like a good option. I will check how it can be done. 

 
Posted : 13/04/2021 10:39 pm
Dynoman01 reacted
(@mjpower)
Posts: 34
Member
Topic starter
 

Thank you so much!
 

 
Posted : 13/04/2021 10:44 pm
(@boz-race-engines)
Posts: 112
Member
 

@admin thankyou

 
Posted : 14/04/2021 4:55 pm
(@mach_1)
Posts: 349
Member
 

Subscribe! , i want this feature too!

 

https://m.youtube.com/watch?v=VWCJknOCYlo

This post was modified 1 year ago by Mach_1
 
Posted : 15/04/2021 3:57 pm
(@yhakan)
Posts: 27
Member
 
Posted by: @mach_1

Subscribe! , i want this feature too!

 

https://m.youtube.com/watch?v=VWCJknOCYlo

Me to!

 
Posted : 15/04/2021 4:49 pm
(@admin)
Posts: 1159
Member Admin
 

I hear you guys 🙂

 
Posted : 15/04/2021 10:59 pm
(@mjpower)
Posts: 34
Member
Topic starter
 

@mach_1
i hope you people didnt understand me that wrong.

i just want the start rpm to be locked until hotkey is pressed.

so when you lead in to the run the dyno will hold the engine at steady state start rpm until user lets the sweep start...

 

 

 
Posted : 15/04/2021 11:19 pm
(@mach_1)
Posts: 349
Member
 

I totally understand you MjPower.   You want to control the load at a pre_set selected RPM manually.regardles it be light load to WOT.

Just study the way he performs six power runs and how quickly the dyno responds to clamp the engine while the operater holds the engine WOT.

The clip i posted is exactly that but in graphing mode  to run a power run from minimum  to maximum selected  sweep RPM's.

 

 

 

 

 
Posted : 16/04/2021 2:47 am
(@manyponies)
Posts: 32
Member
 

@mach_1
i hope you people didnt understand me that wrong.

i just want the start rpm to be locked until hotkey is pressed.

so when you lead in to the run the dyno will hold the engine at steady state start rpm until user lets the sweep start...

 

I totally understand you MjPower.   You want to control the load at a pre_set selected RPM manually.regardles it be light load to WOT.

Just study the way he performs six power runs and how quickly the dyno responds to clamp the engine while the operater holds the engine WOT.

The clip i posted is exactly that but in graphing mode  to run a power run from minimum  to maximum selected  sweep RPM's.

 

 

 

That method works very, very well,         I owned the exact setup in the six pulls video and it worked flawless...... We had a shop fire and the Depac was damaged.......Depac Dave had since passed away and there is no one to repair the systems. I bought this system to replace the Depac.  We are still installing the system in the dyno room.  look forward to getting this system up and running, I think it has alot of promise!!! 

 
Posted : 19/04/2021 1:00 pm
MjPower reacted
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