I'm still running factory injectors right now. I'll be upgrading down the road when I put in the JRSC but I was going to go with 550cc. Should I upgrade now and then later or no? Will running rich throw a CEL with the primary O2 or will it be ok? I'm really just looking for something to hold me over for about 2 weeks to a month after its installed so I can get it to the tuner.