Wow, you keep building and thinking. Cool project.
Jay Leno has a jet powered motorcycle that he admits is insane. He said it is funny to pull up to a red light and see everyone looking UP to look for the low flying aircraft that must be near.
I feel sure yours will not be as noisy as a helicopter jet engine. It will be interesting to see if is heard from inside the car with the engine running.
You must be a master of Google to find all the products you keep using. The rubber bumper material and aluminum weld sticks. Cool stuff. I will keep in mind for my next garage project.
Keep up the cool engineering projects. I am enjoying watching you work!