Originally Posted by steronz
My cursory search just now didn't yield any specs on the HX pistons, so I'm not sure what compression ratio you'd end up with from an HX-EX mini-me like that. Offhand, I would speculate it would be lower than a straight-up EX motor, so the HX-EX won't be as powerful as a full-on EX, but then doing a complete motor swap and ending up with 127 crank hp is kinda silly... if you're gonna go through all that trouble, you might as well swap at the very least an LS motor or a b16, although you'll need to get new mounts and all that. The whole point of the mini-me is that it's relatively cheap, easy, and will give the car a bit more pep... nothing you should go around challenging camaros with, but it's better than nothing, and it's also better than throwing money away on bolt-ons.
wiring shouldn't change, but you will either need a new ecu or a vafc or something. of course, ultimately, if you actually want to go somewhat fast, your best bet is to sell the HX to someone who wants it 'cuz it gets 45 MPG and buy a different car. or just keep it stock and enjoy your 45 mpg until you can save up for a b18c hatch or something.
Thanks for all your help! I'll probably just keep the HX just because of the gas. I was just hoping that throwing some headers on there would increase the exhaust flow and possibly increase the mpg a little, plus it looks pretty under the hood. I'm not looking to make tons of power, but a little wouldn't hurt the car. I mean 115 hp is respectful compared to my stock crx hf. A whole whoping 62 hp. So, just looking for a couple bolt ons to increase the flow and hp a little bit. It does have a akimoto ram air intake, I have heard of them that's about it. Don't know how good those filters are that come with it, but if you know anything let me know. Thanks.