the block is strong enough for probably 400-500 to a maybe 600(that would be pushing it) i've seen a lot of sr20det's makin more than 400 at around 15-17 PSI
well, some custom JE forged pistons with a 9:1 compression ratio, some crower connecting rods, the stock crankshaft will probably resist 400hp.
for the head you can do port & polish, aftermarket cams(comp cams is a good company) and forged valves.
for fuel/air i think greddy makes an intake manifold for the sr20 which is quite smaller and better than the stock, also some 550cc injectors, a garrett t3-t4 or HKS turbo with front mount intercooler(stock sr20 intercooler is side mounted).
for the ecu the engine management system, as a remap is necessary for some of the upgrades.
usually some companies make custom exhausts for such and such turbos so that'd be best way to go, free flow exhaust.
for coolin, yes it needs to be upgraded to handle all the power, koyo makes a good 3 core radiator for sr20's, and dual fans should do that.
the engine management system takes care of the ignition with the coil packs
that should make you a good 350hp or 450hp, you can also put 740cc injectors and more psi and it'll do more, + a good dyno tune so everything goes fine. thats gonna cost a lot by the way, this is all expensive, those forged connecting rods run around $5-700(all 4), the pistons and a greddy turbo kit with better turbo costs like $4000USD.
1993 nissan 240sx hatchback(stock) <<drifter, straight liner, road courser
"Horsepower is the force that determines how fast you hit the wall. Torque is the force that determines how far you take the wall with you after you hit it."
"Horsepower sells cars, torque wins races" - Carroll Shelby
"Real cars don't make power at the front wheels....they lift them."
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thats for pushrod engines, not dohc engines.
Originally Posted by TheOne
