[quote=The Old Coyote;544959]
Originally Posted by Jonr:
"....POWRi and USAC rules are not exactly the same...."
Just as a fan and out of curiosity, what are the diffenences?
The only difference that matters is USAC at 1035lbs with driver and POWRI at 1050lbs with driver.
However, POWRI also allows certain engines to run a lot more cubic inches (Gaerte block engines at 177CID, Mopar block engines at 171CID and Fontana engines at 179CID) but very few if any people have taken advantage of it. I don't quite understand how they think the block is the only thing that matters. All someone has to do is redesign a new Mopar head and run at the 171CID and you have some upset SR-11 and Toyota owners. However, POWRI never checks an engine anyway so I don't know why they even make cubic inch engine rules.
Just a note here, the Mopar block, unlike the Gaerte, has a short deck height allowing it to run a short stroke big bore combo. The varying bore and stroke combos, ever changing cubic inches, canted valve heads, etc etc have been an issue for Midget racers for years. It ultimately allows for obsoleting engines. By comparison WoO Sprint Cars dictate your bore, stroke, rod length, and head design. The World of Outlaws are actually far more restrictive than USAC Midgets and yet run for a heck of a lot more money. Oh and a USAC Toyota Midget engine costs just as much or more than a WoO Sprint Car engine and you only get 4 cylinders instead of 8!
The new Badger engine rules take care of most of these issues. We don't dictate engine design but ultimately everyone defaults to a DOHC engine due to the advantage of the four valve heads. We dictate it must be an OEM engine (head, block and crank) which limits the bore and stroke to a specific range (due to the tight bore spacing of OEM engines and the fact you must run an OEM crank). Our cubic inch limit is the same for all engines which eliminates engine manufacturers constantly begging for more cubes to keep up with the latest engines to come out. The end result has been engines for 50-70% less than the purpose built engines and a car count of 35 without any support from any other series and lap times virtually the same.