I recently swapped out some leaky injectors with some old injectors that I had. This fixed the rough idle problem I was having but it seems to me to be a bad idea to have mismatched injectors so I want to get a new set. Right now my options are to get either a set of 22lb/hr injectors or a set of 24lb/hr injectors. Currently my only mod is an HSR intake manifold with an adjustable fuel pressure regulator but I plan on getting a full exhaust (shorty headers/3" cat back) soon. My question is, How rich will I run at idle with 24lb/hr injectors under my current setup and with full exhaust? I know that the only way to get the tune perfect is to burn a new chip but I am looking for ballpark numbers here. I know that the 22's will be better for now but I plan on upgrading further in the future and do not want to have to buy another set. Also, keep in mind that I can adjust the fuel pressure to compensate a little either way.

Thanks

 

22's would be best. 24's will work might have to back off on the fp a little.