im buildin a 91 ls with a t3/to4e .50 trim turbo im rebuildin my block because of a bad wristpin or bearring. im keepin the stock crank and replacin the rest with all forged intenals. im lookin to make around 300whp. im usin the stock head an intake manifold with a block guard 450cc injectors an an apexi afc neo and an in tank walbro 255 is this build sufficient to make my power goal if not any ideas wat it would be, and also sugesstions to get me to my goal would be great its a dailydriver and i dont wanna kill it in a week

I've seen stock block B1bB's make 320 with proper tuning. The main thing is your fuel and you seem to have that addressed well. I would however look into getting your ECU chipped with CROME. I think that would be a little safer than an APEX'i unit.

yea ibleedjdm is right...you need to go with some other engine management besides apexi...go with crome, hondata, aem ems or something else...a lot of those have boost options and are made to handle boost...also, a lot of shops that i know do not like to tune on afc's. one of the guys that tuned my car from kingmotorsports made 10 more hp from going to a safc to hondata in my friends car

ok now will the safc give me a sufficent tune to be able to drive dailyand also i dont really no much about ecu and chipping how would i go about using a program like crome or hondata on my pr4 ecu

Here's the deal man, the SAFC really just tricks the ECU into adding more fuel without changing the timing which is effective in creating an inadequate situation inside the cylinders. I would never endorse using one as an only form of tuning especially on a boosted application. Chipping an ECU doesn't cost much its around 50-75 bucks depending on who you get to do it. The tuning might cost you a little but your motor will repay you in reliability. If you already have the SAFC then sell it and you will have the funds you need to get an ECU chipped. And no you wouldn't want to use the SAFC and an ECU chip.

ok i understand wat u mean now also u have any idea about a realistic whp ill be makin on my setup

Your power output is determined literally by an infinite number of components. Size of turbo, fuel system, and even throttle body size. It all depends on your setup and tune. I can tell you that I have seen people make 300+ ponies with an AEM EMS and then again I've seen people make 200 ponies with a Neptuned ECU.