One of our members, Boost_boy, has done, IIRC, 350hp on a completely stock CA18DET. That was with a T3/T4 and SDS (and supporting fuel and intercooling mods ofcourse). To be honest, nobody that I'm aware of has taken one up till it broke. I would say the pistons would be the first thing to go as they aren't forged. The crank and rods are forged from the factory. I personally wouldn't go past 300hp on the stock pistons on a regular basis. CP makes forged pistons for the CA and they can be had from http://www.raceeng.com. They keep them on hand in stock, .5mm, and 1mm size overbores as well. They are all stock CR of 8.5:1. I can't honestly say at what point the rods need replaced. As I said before, nobody on this forum, that I'm aware of anyway, has ever damaged a rod. As far as oil pumps and the like, I wouldn't be too worried about it. Just get a new one and rest well. The valve train and bottom end, in stock form are fine up to about 8K rpm. You'll need cams to make it worthwhile to take it that high though. After that, I'd plan on new springs and solid lifters. I would say that would get you up to 10/11K with the appropriate cams. At that point I'd start to worry about the crank. I've never seen anybody walk the crank on a CA, but I don't know anybody who's bothered to take it to 11K RPMS either. In all honesty, I wouldn't see much use in wrapping it up that high unless you're building a dyno queen/drag monster and need the revs to make use of a ginormous turbo. Even then, the CA head is pretty tight and trying to get a cam with that much lift to work is going to be a major project. The last thing is the timing belt. They make aftermarket ones that are stronger than OEM. Unless you're planning on spinning the motor up to crazy revs on a regular basis, I don't see much need, just make sure it gets replaced regularly and you'll be fine.BACARDI_DWB wrote:now float. you say that i small rebuild will take whatevery you throw at it. now what is the max that you have seen? before oil pumps start going and things start flying? has there been someone here that has done a small rebuild and pushed the 700hp envolope? 800? not doubting you. actually you are perfectly right in saying that to any normal user for the ca18det cause most of the normal users wont see the 500hp. (water injection/timing/fuel mapping/matching turbo's/leaded fuel) so on and so on just wondering what has been seen on the CA18DET in the US/austrailia? i know those japanise wake up and wipe hp out of their eyes they have so damn much of it. lol... just wondering what has actually been done.