i am gunna be running an ls vtec in my 99ex for a little while till i can get the time and money to finish my other engine. all i have is the stoke ecu for the car. i was running it with the b18c1 in the car with no tune for a little while and it seemed to work fine. my question is.... with the ls vtec set up will it be ok to run the stock ex ecu or should i chip it or what? i know alot about building engines just not a hole lot about tuning them.oh and i am looking for a cheap solution concitering the ls vtec will only be in the car for a short time.