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could someone post some numbers or dyno sheets for naturally aspirated or forced induction cars, and plz post the mods they have. i was practically certain that i wanted togo na but i did some research and not sure if ill get anywhere near the numbers i wanted, and itll be way more expensive then forced induction. so pretty much just want to know exactly what ppl have been able to do with what.

 
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What numbers are you looking to hit?

 
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heh, not even sure anymore, went to the car show here in chicago and practically fell in love with the new mazda 3, lol. but really i was looking around 250, i might say screw it and just do a few simple things to my civic and get another car in a year or two. by simple i mean i/h/e, pulleys, high compression pistons and maybe some ecu tuning. speaking of which, if i got 11.5:1 compression pistons what else would i have to replace? new sleeves? valves? retainers?

 
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NA means... no flames please heh

 
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na=naturally aspirated, as in the motor does not have any kind of forced induction, so no turbo or supercharger.

 
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...and some N/A cars are predisposed to nitrous, as its not necessarily a form of forced induction.

Most N/A 4cyl. cars are high compression, high revving creatures and you can only go so far on pump gas.

 
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yeah which is why im prolly going to limit myself to like 12:1 compression pistons and not even bother raising the rev limit cause that would mean i would need a transmission cooler(i have an auto) and a radiator or else the engine would prolly end up exploding. not to mention new crankshaft and pretty much new valvetrain. oh and a ton of tuning to make sure nothing hits anything else. but yeah would i need new valves/springs or maybe resleeving if i raise the compression up to 12:1?

 
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New valve springs would be for running a high revving engine. If you did plan indeed on running a high-powered N/A car, or even a turbo car on an automatic transmission, you'd need a transmission cooler anyways, they're not terribly expensive last I checked though, and the install was pretty straight forward.

Tuning an N/A 7th gen would probably be a lot easier too if companies like Hondata manufactured devices for our cars to allow more accurate tuning.

There was a guy on here a while back who had a really nice N/A engine that used ITBs (individual throttle bodies), that was damn impressive.