i heard that when you take the cat off and stuff that you need a bigger fuel pump. is it true? and whats good?

 

https://www.rx7club.com/search.php

 

No

 

the closer you run near 15 psi on the stock fuel system and ecu, the closer you are to running too lean. i think the reason you were told that is because if you are running a downpipe and midpipe you basically have no back preassure and could easily cause boost spikes. a bigger fuel pump is just extra security since at 15psi your injectors and nearing the limit. I think you should look into getting a new ECU if you want to run a midpipe. people call it the 3mod rule, if you have changed 3 things, then you need a PFC.