the temp matters a lot.

the cooler the air, the more oxygen it contains per liter. at one atmosphere, the same number of liters enter an engine no matter what temp.

the more oxygen, the more hydrocarbons burn, meaning more power.

the intake and exhaust are not dependent on each other as the cylinders are filled by vacuum, but expelled by positive pressure. also, the hot air of the exhaust contains fewer molecules per liter, but the same number of molecules leave. Thus "more" air (in liters) leaves an engine than enters it.

 

i have the PRM - it's nice and loud, easy to install (no bumper removal, and cleaning the filter is a snap).

i can email a sound clip to you if you wish -- if interested drop me an email at jeremycriswell@yahoo.com

-jeremy

 

besides that hp dyno test that TOV did a couple years ago...has anyone else dynoed their AEM v2? the gain should be around 8-10 hp according to that TOV article.

i have the v2, its a great choice for a good price. install is a pain though!

 

aem v2

 

K&N FIPK Gen 2

 

Thanks for the input...all I really know about this is what I learned in High School physics. i thought that the exhaust was expelled because it expands when combusted (hence the pistons moving up and down). If you move hot air out the exhaust, it will be at a higher pressure than cooler air, thus creating back pressure. You can only get rid of as much air as the header will allow. When cooler air from a CAI is put into the cylinder (it is "more" hydrocardons and etc. like you said above) and it expands, there is more air to expand, thuse creating more pressure on the exhaust system. This is why most CAI companies usually state that max gains will only be recognized with a high-flow exhaust system.

I was once told that all an engine really does is "move air." This pretty much rings true. The more air you can move through the engine, the more HP you will attain (more combustion = more pressure for the pistons = more HP). The CAI is truely limited by the header and exhaust. If you change those out as well, the HP gain will be even more than if you changed exhaust / header without a CAI.

I was not sure about the short ram air intake...that is what I meant be RAM air not a cowl or hood vent. I thought those were called RAM air because it was a dedicated scoop for the short ram intake.

The CAI does put cooler denser air into the engine, albeit LESS (volume wise) than a short ram system. The short ram system (i thought) put MORE air in (volume wise) that is LESS dense. Either way, you get "more" air into the system. The short RAM is able to move more air, because there is usually at least 2 bends less (bends slow air flow).

So....the way I understand it, the short RAM air intake moves more air volume wise, where the CAI moves less air than the short ram (but more than stock) but move denser air.

Apparently the CAI is better because it reports higher gains, so the denser air contains more hydrocarbons (and whatever else) than the comparatively less dense (but more volume) hot air.

One of my family friends told me all this...he owns a local car repair shop and is a Certified mechanic. But.....he could be wrong. I am just relaying second-hand knowledge. I REALLY enjoy learning about this kinda stuff, so if I am wrong, please correct me and provide an explanation, so I know WHY I am wrong and why the above theories does not apply.

Thanks

John

 

1. Has the thought occurred to you that they might be trying to sell you an exhaust system? It also varies depending on the quality of the original parts. Quality of original S2000 parts > Quality of original Civic parts... Result: less room for improvement.

2. You have any evidence of that? You are assuming the intake piping is a smaller diameter than it should be...

 

Easy Install

Great Sound

No Heat Soak

No Hydrolock

Dyno gains of 9.4 by K & N on AP2, with similar gains proven by member dyno results.

 

dude i'll sell you my v2 make me a decent offer and its yours a month and a half old I got the Arc instead for me i like it better.