The big tracks are motor eaters for sure. The other issue is the Esslinger engine horsepower that one must compete against on the bigger tracks. A very well known engine builder recently told me that they have nothing that can compete with an Esslinger. Thank the big box org for giving them the extra cubic inches a few years ago for making most other engines has beens. Yes there are other engines on a given night that can compete, but the word on the street is that if you want to run up front, you need an Esslinger.