Quote Originally Posted by Mooney1184
intake manifold splits into 8 runners (2 per cylinder), 1 stays closed until 4ishk rpms and then opens for better low end torque
+1 and good post, and I'm probably gonna get flamed for this, but:

I don't see why people like the butterfly valves in the J-spec CA. I've seen UK-spec CA's do some serious damage on and off the track, and they have a 4 runner-4 port design. None of that butterfly stuff. Shit, the highest hp CA18 outside of Japan is a UK-spec S13.

I dunno, I just think this would flow better than splitting it into 8 ports. Not to mention that damn near every CA I've seen w/ the head/intake mani off is gummed up behind the valves.





Oh, and I'm gonna reinforce my earlier post.

CA18ET > KA24. The KA in my 90 S13 blew up 2 weeks after I got it. And the CA18 in my S12 has gone through HELL with the last owner. Yet it still runs, and gets nearly 300 miles out of a 12 gallon tank. Runs pig rich, but fact is, it runs and it's not showing any signs of the rods saying hello to the fender wells after punching their way out of the block.