theres nothing wrong with rotarys... all you hafto do is make sure the "OPM"(Oil metering pump) works if it doesn't you'll hafto premix about 4oz of 2cycle per fill up of gas...also never never let it overheat!!! upgrade your clutch fan to a electric fan!!!

after that your good to go...to get the most out of your rotary think big exhaust real big...ang get ready for exhaust tickets...

you won't swap a 13b in a s13...you won't!