Originally Posted by djmachinist

I agree with wingracer, We have limited the rules to "Flat top pistons, no
slug weighted cranks, max of 7 port sleeves and steel bearings". Most of the engines that meet these requirements are built by Novarossi (and rebranded Novas) and Siro. They are considered "budget engines". They have a street price of $149.95 to $244.00 compared to a street price for a Nova Flash 21 that sells for $650.00! I beleive if we limit the engines to the above criteria we will be ok. If things change as far as supply in the future, we may have to go to a approved engine list as some have mentioned on this thread.