I've installed mass air flow TPI setup on my chevy 350 and I'm using an ARAP chip. First I had 19lb injectors that came with my ebay TPI setup and I adjusted the ARAP ROM for them and the car ran fine. Then I upgraded to 24lb injectors, burned a new ARAP and the car ran fine. I wanted more mid/high range power so I installed a Lingenfelter super ram intake, mild rollercam and trickflow 195CC heads, and new trick low 30Lb injectors. I burned a new chip and the car ran like crap and smelled really rich. I burned a new chip with an injectors constant of 32lb and still ran rough and rich. So I put the 24lb injector chip I had used before and the car ran fine again. I pressurized the intake track and have no air leaks. I changed nothing except the injector constant and don't know what I'm doing wrong. Any help would be appreciated.

 

Just a thought maybe your injector constant is right an your MAF table is out causing things to run rich an needs to be corrected . Going from 19 lb /hr injectors to 30 lb/hr injector is a pretty big jump for the MAF to compensate for .

 

I agree. Also, check what your BLM's are and then correct them to get closer to 128 via MAF tables. What BIN are you using? You should be using 6E as it is the best code. Either way you will have the MAF tables 1 to 6 to tune.

Brief explanation of how to tune this:
The idea is to play around with the g/sec #'s at the closest voltage number where the BLM's are 'off' at... If you give it more g/sec at any given voltage, you are telling your computer to give your engine more fuel, whereas if you give it less g/sec, then you will lean out the engine more. It all depends on what your BLM's are at, but judging by what you're saying you're probably below 128 (which is rich) so you will need to REDUCE the g/sec where you see your BLM's are LOWER than 128 and INCREASE the g/sec where you see your BLM's are HIGHER than 128.. Good luck!