Working on an Engine Simulator
Thread Starter
Teching In
Joined: Feb 2024
Posts: 15
Likes: 5
I'll admit, when i first saw this, i thought it was going to be a low effort, simple empirical model, but it appears to be more than that.
It looks like when solving for VE you are using some empirical equations with a helmholz equation. Im not sure what your background is, but have you considered trying to actually solve the 1D wave equation in the intake runner to get a true 1st principles physics prediction of VE? I feel this is what separates the Desktop Dyno softwares of the world from real, full physics based engineering tools like GT-Power. No doubt this would slow the simulation down, and is not trivial to implement, but I'm curious what your end goal is.
It looks like when solving for VE you are using some empirical equations with a helmholz equation. Im not sure what your background is, but have you considered trying to actually solve the 1D wave equation in the intake runner to get a true 1st principles physics prediction of VE? I feel this is what separates the Desktop Dyno softwares of the world from real, full physics based engineering tools like GT-Power. No doubt this would slow the simulation down, and is not trivial to implement, but I'm curious what your end goal is.
I just pushed an update. I updated the VE calculations, the current model uses a flow model based on cam/head flow/piston speed, intake runner length (flow harmonics), etc... I'll continue to improve on it, the current model is pretty good. I will be loading more options to the parts libraries soon also (243, 317 heads, Holley Hi Ram, etc...). Send requests for additional heads, cams, and intakes.
Thread Starter
Teching In
Joined: Feb 2024
Posts: 15
Likes: 5
I updated the exhaust sim which affects quite a bit of other calculations and now the numbers are looking pretty good. I added several head and cam options to the library also. I added an injector vs pressure rating calculator, an injector sizing calculator and an power/ET/Weight calculator.
Thread Starter
Teching In
Joined: Feb 2024
Posts: 15
Likes: 5
I made several calculation improvements as well as interface updates. It's now possible to copy values from a spreadsheet (like Excel) and paste them into IAT, VE, AFR, and Timing Table (albeit the grid sizes need to match).
