Ok, heres a question, Its a question that I have genuinely wondered about, and I hope it doesn’t aggravate anyone thats not the intention.
If I have a car that has a carburetor and is a stickshift with a 4th gear that is direct drive.
We put the car on a dyno for one hour, run it wide open flat out in 4th gear for one hour and its running at 5000rpms, lets say it used 1 gallon of fuel in that hour.
Same car on the dyno run wide open in 4th gear, dyno puts a load on simulating a 25% grade, engine only turns 4000rpms. Would it still use the exact same amount of fuel?
I say YES
Would a fuel injected engine have different results?
I say possibly.
Why are you asking this silly question Rick???
Confession time. Its not about a car but it could be.
I am actually wondering about my mantis tiller, I run it wide open in the dirt and the rpms vary with the type of dirt, moisture in dirt ect…, there is no governor to open the throttle more to maintain RPM because the throttle is already wide open. So if the throttle is constant, but the load varies, the amount of work being done is the same so it uses same amount of fuel right?
I am not saying im right, I just want to better understand engines. I very well may be wrong… I just don’t know…