Looking to do a b18b1 build (yes I'm staying with the p75 head as well) with a percision 6262 turbo, all I have bought so far is brian crower stage 2 n/a cams (I've been told they work well on a turbo setup) , any suggestions on what I need to make 600hp obtainable? (Mostly looking to do drag races (1/4) but hopefully maybe take out On the streets a couple times a summer) I know it's going to be a ton of work ,I know I need the brian crower dual valve spring and ti retainer kit but I have no clue what to do for valves, I know I need to port and polish the head and I was going to hot tank it and redeck it if needed but is there any other machine work I need to do? (I want to stick with stock sleeves , I know it's better not too but I've seen b18b's at 700 with stock sleeves ) , Not sure what rods or pistons to get but I was thinking I'm gunna have to up the compression with my power goal, I'm thinking the stock honda crank should be fine? I was thinking 1000cc injectors with a walburo 255 pump , not sure of anything else thanks for any help/input

 

There are many many similar threads to yours here on H-T, so you can search and browse through those threads. Make sure to read the Forced Induction sticky too.

In quick summary you'll need

Forged pistons with upgraded wrist pins (81.5 mm for stock sleeves or you can go 84mm with sleeves - 10:1 CR)
Forged Rods
Sleeved block >> No stock sleeve Honda block survives at >600hp, if they make a glory number its usually short lived
Stock Crank is fine
ARP fasteners
Cams and valvetrain (you already listed)
Switch to a B16/B18C crank damper or an aftermarket one
B16/B18C water pump is not a bad idea either due to the higher rpm your B18 will see

1000cc and 255 Walboro will only work on 93 Octane and even then be a push for 600hp. If you plan on running E85 or any Ethanol blend you need at least 1600cc
Look at something like 1450 or 1600 cc Bosch EV14 style injectors and a 340 or 450 lph fuel pump with dedicated relay and wiring

Your turbo manifold and intercooler choices will influence the power reached.

600whp can be achieved reliably, as long as you select the right components and the engine is built to exact tolerances. The non-vtec head will need more boost and turbocharger flow to achieve the number, but others have succeeded.

 

Since you are going to keep the ls head you will need all the help you can get, stage 3 crower cams work very well, make sure you have some good cam gears to dial in the overlap. Stock sleeves over 600whp its a no bueno. Even on race gas or e85 i wouldn't past 575whp with them. A good quality ramhorn or top mount should take you there.