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View Full Version : KA24DET max engine speed



driftONE
10-20-2002, 12:37 PM
What's the highest redline possible with the KA. And how is this acheived?

daywalker
10-20-2002, 07:12 PM
I use to rev to 8k, but toned it down to 7500rpm. You need a built bottom and head work. I have oversized valves, Ti retainers and dual springs. So far so good cant complain. I dont know about the stock motor though.

**DONOTDELETE**
10-20-2002, 08:48 PM
What is the peak horsepower/torque?? No need to rev past that, it is stupid.

daywalker
10-20-2002, 11:53 PM
No need LOL. If you ran my turbo you would know it pulls to 8k without problems. I dont have dyno #'s and I would not post them until I am done w my car anyways. My brother revs to 7500 rpm on his Eclipse(4g63) and he realizes max hp and tourqe @ 7500rpm(363whp) on a 18g Greddy turbo which is way smaller than mine and he didnt have headwork done WHICH I HAVE.

orion
10-20-2002, 11:54 PM
To make good power over 6000-6200, you'll need some good cams and head port/polish at least...

And I believe I read once on here that Sunbelt (who builds Nissan race engines) said the KA won't hold up for too long is continually run over 7500 - Too long of a stroke I believe, among other things.

FYI - In my S14 with I, H, E, JWT ECU, and S13 cams, I make max power (158rwhp) at 5900...so why rev any higher???

Later - Brian

daywalker
10-21-2002, 12:04 AM
Well I ran mine for over a year now and no problems and I beat on my car all the time. I know KA's have a long stroke, but if you build it I dont see a problem. With lighter pistons and rods the car should rev to 7500rpm without worries. Oh btw I also run a UR crank pulley on my car to 7500rpm.Here is a pick of my old setup and head work.

http://members15.clubphoto.com/_cgi-bin/getImage.pl?imgID=13624192-4b7f&trans=

http://members15.clubphoto.com/_cgi-bin/getImage.pl?imgID=13623586-e58e&trans=

s14turbo
10-21-2002, 01:27 PM
your links don't work. how do you like your oversized valves. i'm asking cause i was gonna go that route, but i saw that the valves were already huge, any bigger and i'd get valve shrouding.

asad
10-21-2002, 02:27 PM
Copy and paste the links.

Asad

daywalker
10-21-2002, 05:45 PM
I cant say that I dont like them, but since I did everything @ once I really have no camparison. I use to run a small t3/t4 turbo on my stock motor @ 9psi.Then did the rebuild and got a larger turbo so I can say it sure kicks a$$ and I dont have too much lag. It pulls hard all the way to 7500rpm like I said. Im in the process of upgrading the turbo and intake manifold so I can get more hp out of it.
Sorry for the crappy links. Just do what asad said.

s14turbo
10-21-2002, 07:02 PM
are those the supertech valves? you got any flow bench numbers on your headwork?

daywalker
10-21-2002, 07:07 PM
The POS shop I use to deal with lost all the info on the job and BCE doesnt keep records....so they say. All I know its a stage 4 BCE race head. Im still playing catch up since I started working on my car myself. That shop really put me behind, but all is good now.

jeremiah
10-21-2002, 10:22 PM
wow nice car, you got any other pics of your setup...my dads working on building his right now and is still looking for ideas....