oh ffs sake, read the first three posts and nearly threw up.
so unless you are looking at 400-500HP ignore any of that crap. cam isnt gonna do squat anyway at all. to start with you have two cams, the best one to change is exhaust, but even then only when you are pushing over 400.
intercoolers are a joke. depending on what you have already. if you have a nice thick R34 or S15 intercooler, then thats all you need till you decide to push 12 psi. 12 psi can be achieved easily buy simply sticking a bleeder valve in your waste gate actuator feed hose. bumping up to that is a bit riskiy on hot days but normally should be fine with stock air box stock manifold and stock ecu program
oh yeah, air pods suck in hot air off your engine. so ignore that crap as well.
so for a simple 350hp SR20, start with getting your gasses OUT. so get a nice exhaust and de-cat pipe. then look at you air going IN, so bigger MAF (300zx) bigger TB and a GOOD FLOWING INTERCOOLER dont buy that crap off ebay, dont buy a HUGE front mount intercooler, they take longer to expand, therefore take longer to deliver pressure to the engine. think of a blowing up a baloon, its hard if you smoke, but think of trying to blow up three baloons all at the same time while smoking. what you are doing by going bigger cooler is increasing the mass surface area of pressure, thus increasing the time it takes to fill that area, thus increasing your turbo lag.. which on a SR20 is bad enough already cos they have crappy torque curves.
get a good air cleaner
element to go in your stock S15 box. the 15 box has 2 sources of CAI so you dont need to be a nonce and go looking for cold air, they breathe just fine.
NOW you go and boost her up. they are good for up to 12 psi stock, 15 is managable for a few thousand kms in cold weather, but you really wanna be looking at new bearings if you have an older one. i have been told a newer S15 will handle 18 but cant confirm that.
now the suckie thing about boost is that if you dont fuel her, youll lose her. so you will need to pluck your fuel return pressure to trick your engine into thinking she is using less fuel than she is so it ups the duty cycle. there is a reg you can get which bolts straight onto the old reg and is adjustable either + or - however you need. doing that will keep her wet at high boost and keep her happy.
better yet, grab a new plenum with extra bosses for new injectors. there is a trust/greddy unit made with 4 bosses, so you have your 4 stockies then 1 per cylinder extra just to keep her wet.
THEN you can go silly turbo.
have i said enough? i think so.
