Q&A Forum
Hello, I am strongly considering purchasing the Ultimate kit to update my 2011 Stuska engine dyno. It currently utilizes the Stuska QuikStik LC which controls the load placed on the engine by varying water pump speed and pressure via a VFD hooked to the water pump. There is no other water control valve in the system. One of my questions is will the Yourdyno Ultimate control the VFD which controls the Stuska water pump? Or would I still use the Stuska console/desk with the rotary knobs that vary the amount of load on the engine and the acceleration rate if possible. Thanks
Hi,
YourDyno can control the VFD if you prefer, but we recommend removing the VFD and just have an on/off switch for the pump, and instead use the YourDyno valve + a pressure relief valve. The valve is much faster to respond compared to the VFD, because it does not involve accelerating or decelerating the pump. So control is better.
The rotary knob to control the load needs to be changed. There are many alternatives, here is one we recommend for hand control: https://www.amazon.com/DROK-Lossless-Computer-Controller-Adjuster/dp/B01MV411BR/ref=sr_1_2. Pretty nice unit.
The Start RPM, acceleration (sweep rate) and end RPM etc are set in the Brake setup in the Run window, as you see in the attached screenshot.
Feel free to call us at +1 (603) 491-5961 (Kevin) or +47 4840 1289 (Jostein). We can go through the options and recommend a setup for you.
Thanks for your response, this is already better customer service than I currently get at Stuska and I haven't even purchased your products yet. 🤦♂️
So the rotary dial you recommend is to replace the current Stuska load control dial that is used to adjust the water pump load on the engine to set starting rpm load?
I have always been happy with the performance of the load control system using the VFD and the water pump. At least to get started I would like to keep that system. Perhaps if it doesn't still work OK I can go to the separate water control valve? I test NA applications 99% of the time so I don't typically see any spikes in engine acceleration like a boosted engine may.
My Stuska is the dual absorber "1600 hp" style with a 10 hp water pump. I currently use a manual cable for throttle control instead of the Stuska electronic throttle so that won't be any problem either.
The rotary dial is purely optional, but it can be used to manually control the load (either by varying the VFD frequency or the valve opening). Nice for example when you are warming up the engine. It can also be used to change the target RPM if you do steady state. If you don't have a wheel, then you use your mouse or keyboard. The dial is certainly easier if you do a lot of this.
When you do sweeps (in other words most of the time) then you set the start RPM, end RPM and sweep rate in the options. You can also set a brake ramp up % such that by the time you reach the start RPM the engine is nicely loaded so it locks more quickly to the start RPM before the run starts. So this is not something you need to do with the wheel, the brake automatically comes on as you increase the RPM towards the start RPM.
Running the VFD is fine for engines that don't have a sudden torque increase, and as you say you can always add the valve later if needed. So no problem to start with that. You can send me the make and model of the VFD and I can double check compatibility. Send to jostein@yourdyno.com
YourDyno supports both electronic and manual throttle. In my view manual throttle is the way to go unless you need to do long run automated tests or something like that. Simple is good!
Email sent, thanks again.
Can you detail the rotary connection / settings to manually control the water valve opening for warm ups or manual loading