CAI question
 

Whats a good way to get the performance or better then a K&N cold air intake? I got a 91 so it has the less complicated intake system if I remember right also.

Another question kinda on the subject, how much power would no intake give? just a tube I ran the car for 10 mins with no intake on and it seemd to start & rev way faster

Running without a filter is not the wisest course of action, however you might see similiar performance gains with a high flow filter. K&N by itself won't give you a huge increase. The flow of air is not smooth in the stock tube, so depending on how much you're willing to spend and how much time you're willing to put into a CAI you can swap in an aluminum pipe for smoother air flow. Also avoid 90* turns over a short distance. Beware of where the air is coming from. Rotories run hot exshaust which heats the engine bay air much higher than normal. A block off box might be the solution for you (something that seperates the engine bay from the filter. Also if you want to cut a little bit you can even get colder and more direct air from either the brake dam or from inside the fender.

Don't be shocked at the horsepower gains or loses you experience. Depending on your setup you might gain as much as 10HP at a certain rpm or you may lose as much as 10HP. Just be smart and experiment a little bit.

Do a quick search and you can see different peoples setups. Right now I'm running stock, but i'm designing a CAI system that is much different than what's out there right now. We'll see how I finish it. I'm thinking of enlarging the tube to 4" diameter from the original 3.5" or 3" (i don't remember which one i did) I'm just trying to figure out the best way to use the MAF and not restrict flow.

Oh yeah I just ran without a filter to see what that little thing inside the tube was, when the car started it got sucked in alittle and when I pushed on it the car choked and died, is a cold air intake gonna have that or do I not need it?

heh imma go replace the O2 sensor now, we've had the same one for the past 15 years lol see if the car runs better with that then I'm going to get either a K&N CAI or build my own, whoch would you recomend?

For the price that the K&N costs you could build your own and get a better flow. that piece you were wondering about was the MAF (Mass Air Flow sensor). In a stock setup the ECU uses it to manage the fuel injection (basically the A/F mixture). If you are planning on going to a standalone unit (such as megasquirt or e-manage) you won't need it, but until you get the stand alone and are running a stock ECU you will. There's a website out there that sells an adapterplate to increase flow. But I don't have the website on me right now but I remember it costing about 160... which is a little expensive for just a single piece of aluminum that attaches between the filter and MAF. Whether or not it works....I dunno.

Most people I've seen on here buy a prelude or civic intake and frank it to the throttle body and runit to the maf then run another pipe or box it in. usually you can get the piping off of ebay for like 10-20 bucks.

hmm
I'm not sure what I'm going to do yet then I'll keep looking tho

Btw, a cone intake is not a real CAI, even though they say it is. A CAI involves blocking off the hot air under the hood from the intake, so only fresh air comes in. You can make one yourself or find a mechanic who can. There might be kits too, I dunno.