Okay....I stand firm in my last post, L28ET is always fantastic. SR are great too. For my soon to be S30, NEVER will I put in a silvia motor. They are badass, yes I know. It's just not what I want, it just doesn't seem like the best option for me and what I want out of the car.
For clarification on SR20DET power and configurations.
-S13 motors began as redtop, and later switch to a black top valve color.
They do have the best flowing head, it's the low port head. Turbine was
T too small 25. The intake manifold was THE bottleneck.
-When they switch the valve covers for kouki S13, and later RPS13 that's all they changed. Just the cover of the valve cover.
-When the Zenki S14 was released there were significant changes to the motor.
-Head was switch to a high port design. Variable valve timing was added.
-Turbine was switched to a T28BB
-S15 motor was the ultimate stock SR20DET. Besting the S13 engines 210HP,
For a claimed 250. Torque was up as well. The motor is sweet. The SPECR model also has a fantastic (model specific) ball bearing turbine. Coveted in the simple and effect SR tuning circles. Nothing like making 320-350 rwhp on a stock turbine!
Tuning an SR is easy. Most 240SX owners take un-necessary steps in their quest for power. All of these crazy, expensive mods are not as effective as a simple set up.It is all about bang for the buck, Unless you still live with your parents!!! Basic upgrades.....The usual....front mount, Exhaust mani, Down pipe, cat back, test pipe???, BOV, T28BB, S15 injector (or larger), ROM tune and boost control is all it takes to make good reliable power. And hey it's pretty much stock. Many people make serious power with basic engine work on top of these mods. Cams, gears and what not.
With these simple mods an S13/14 hauls ***. Drop that in a lightweight early S30...wow.
But then again, it's not exactly cheap to tune any nissan motor. Well with the exception of the L28ET. We'll see what I end up with. But right now, I'm leaning towards a 4AGE......
JUST KIDDING