Air fuel ratio with basic setup
I have a basic sr20ve setup with ssac header with 2.5inch dp, hotshot wai with pop charger, de maf, calum basic, and a greddy 60mm catback. My aem wideband shows about 13.4-13.6:1 wide open in 2nd and 3rd gear runs on ngk bkr6e's.I have a walbro 190 , but its no the high pressure one. I've read of a few people using and adjustable fuel pressure regulator on the de's and gaining 5-10whp because of the 3 inch hotshot intake. Does anyone think it is beneficial to go ahead and get a nismo afpr and bump up the psi a few?