Originally posted by Sportmode
most likely if you want to have 300 hp you will need to build your motor to prepare it for high boost from a turbo. You could easily spend 2 grand to just build the motor. Or you could search around for a cheap turbo kit and possibly hit around 250hp with stock internals and a properly tuned engine, people sell some cheap turbo setups on www.thepartstrader.com every once in a while, just make sure you know what youre getting.
Let me support my previous statement with these thoughts.
~He said 300hp, he didn't say weather that was wheel HP or crank HP. Most
STOCK LS engines with decent tuning will put down 230~260whp at 10~12psi. Now there is about a 12% drivetrain loss of power in FWD cars. With 250whp that equates to 300hp at the crank. So there ya go. This is on a measly LS engine with it's flow resticted head and piss poor cam profiles.
~Most bolt-on turbo kits like DRAG, REV-HARD, Max-Rev, ect will easily produce in excess of 270whp on a properly tuned GS-R engine. That equates to over 300 crank HP. The combination of VTEC head and higher compression gives way to more HP over an LS engine. Though the LS will have a *bit* more torque.
~ This is all running conservative tuning and being freindly to the life of your engine. Bumping up the timing and leaning out the fuel under boost will produce more power to a certain point, until it detonates and blows piston chunks out the oil pan. Also i'm speaking from the point of using a standalone where you have decent control over your fuel and timing maps, not these retarded FMU/Big fuel pump setups.
~It's not entirely necessary to "build" your engine if you want over 300hp. I've seen a certain person run 20psi on a stock block LS engine and make nearly 300whp. The best advice you'll ever hear is this "Tune your car"