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Home > Performance Mods > Engine Mods > What it means to be naturally aspirated..(and other abbreviations)

What it means to be naturally aspirated..(and other abbreviations)

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Web Reg'd: Apr 17, 2006 THE SHADOW	Naturally-aspirated engine From Wikipedia, the free encyclopedia Jump to: navigation, search A naturally-aspirated engine or normally-aspirated engine (or "NA" - aspiration meaning breathing) refers to an internal combustion engine (normally petrol or diesel powered) that is neither turbocharged nor supercharged. Most automobile gasoline (petrol) engines are naturally-aspirated, though turbochargers and superchargers have enjoyed periods of success, particularly in the late 1980s and the current 2000s era. However, most road-going diesel-engined vehicles use turbochargers, because naturally-aspirated diesels generally cannot offer suitable power:weight ratios to be acceptable in the modern car market. Air or fuel-air mixture is forced into the cylinders by natural atmospheric pressure upon opening of the inlet valve or valves. The pressure within the cylinder is lowered by the action of the piston moving away from the valves (so as to expand the volume available for incoming air). In some cases the lowering of the cylinder pressure is enhanced by a combination of the speed of the exhaust gases leaving the cylinder and the closing of the exhaust valve at the appropriate time. A tuned exhaust can help with this but generally only works at a narrow range of engine speeds and hence is most useful in very high performance cars, aircraft and helicopters. Many NA engines today make use of Variable Length Intake Manifolds to harness Helmholtz resonance, which has a mild forced induction effect but is not be considered true forced induction. Cylinder head porting design is of premium importance in naturally aspirated engines. Camshafts usually will be more "aggressive", having greater lift and duration. Also, cylinder head gaskets will be thinner, and with the top of the piston rising up into the combustion chamber, for high-performance NA engines that benefit from higher compression. Naturally-aspirated engines generally gives less power than either turbo or supercharged engines of the same engine displacement and development level but tend to be cheaper to produce and more fuel-efficient[citation needed]. In drag racing, naturally-aspirated vehicles are vehicles that do not run a blower, a turbo, nor use nitrous oxide. Many racing series specify NA engines to limit power and speed. NASCAR, Indycar, and Formula One are all in this category. Naturally-aspirated engines have been mandated in Formula One since 1989, in order to curb the excessive powers being developed by engines with superchargers or turbochargers. Ignorance is bliss....305 fo life!...haha...Poser
[#] Dec 27, 2006 10:45am
MrScion07 Reg'd: Sep 09, 2006 Godlike Advisor	might b a stupid question but what if u have NOS and i think you should talk about other abreaviations we have on this site cuz i have seen some people asking about I/E intake/exhaust and others i know when i came in here it took me awhile to figure out wut i ment and i was too shy to ask
[#] Jan 16, 2007 10:04am
Web Reg'd: Apr 17, 2006 THE SHADOW	NOS is also considered a form of forced induction, like a turbo or S/C. JDM = Japan Domestic Market (*FYI: The tC is NOT* a JDM vehicle*) FI = Forced induction S/C = supercharged NOS or N2O = Nitrous oxide TB = throttle body WOT = Wide open throttle N/A = Naturally aspirated (nothing but the engine itself is giving you power) FS = For Sale WTB = Want to Buy ITB = indevidual throttle bodies IAT = intake air temperature MAP = manifold air pressure ECU = engine control unit I/H/E = intake/header/exhaust BOV = blow off valve HID = high intensity discharge O2 sensor = oxygen sensor VVT-i = variable valve timing with intelligence VTEC = Variable valve Timing and Electronic lift Control VVTL-i = variable valve timing with lift intelligence CAI = cold air intake SRI = short ram intake FTW = for the win OEM = original equipment manufacturer CEL = check engine light DIY = do it yourself LOL = laugh out loud ROFLMAO = rolling on floor laughing my ass off LMAO = laughing my ass off FYI = For your information WTF = what the fck PITA = Pain in the a$$ Bump = the act of pushing your thread from it's current position to the top of the "Latest Thread Activity" list Any others, please add on Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 16, 2007 10:18am
Orin Reg'd: Dec 08, 2005	I know this has nothing to do with cars, but what does IMO mean? and OEM
[#] Jan 16, 2007 01:16pm
Web Reg'd: Apr 17, 2006 THE SHADOW	IMO = in my opinion OEM = original equipment remanufactured Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 16, 2007 01:42pm
Web Reg'd: Apr 17, 2006 THE SHADOW	BHP = brake horse power WHP = wheel horse power HP = horse power (at the crank) Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 16, 2007 03:21pm
rrimportracer Reg'd: Feb 28, 2006 Godlike Advisor	what is ftw??? myspace.com/asphalt_photos check us out!!!
[#] Jan 16, 2007 11:34pm
andino Reg'd: Mar 05, 2006 Godlike Advisor	what is break horse power? i always hear them saying that on top gear lol Are you in SoCal? Come to our CStC meets! Located in Socal? Need something Installed? Have a question and no one is willing to help? Shoot me a PM or hit me up on AIM.
[#] Jan 17, 2007 12:27am
rrimportracer Reg'd: Feb 28, 2006 Godlike Advisor	brake hp is pretty much crank hp myspace.com/asphalt_photos check us out!!!
[#] Jan 17, 2007 12:29am
tc_ownsu Reg'd: Dec 07, 2006 Tech Advisor	rrimportracer wrote: what is ftw??? fuck the west!!!! lol jk!!! love the west!!! 2007 Flint Mica Mod_Up!!!
[#] Jan 17, 2007 12:55am
andino Reg'd: Mar 05, 2006 Godlike Advisor	tc_ownsu wrote: rrimportracer wrote: what is ftw??? fuck the west!!!! lol jk!!! love the west!!! i thought it was "for the win" ? Are you in SoCal? Come to our CStC meets! Located in Socal? Need something Installed? Have a question and no one is willing to help? Shoot me a PM or hit me up on AIM.
[#] Jan 17, 2007 12:56am
tc_ownsu Reg'd: Dec 07, 2006 Tech Advisor	lol dont know man!!! 2007 Flint Mica Mod_Up!!!
[#] Jan 17, 2007 12:58am
Web Reg'd: Apr 17, 2006 THE SHADOW	Yeah... FTW = for the win BHP = same as hp (crank hp)...before any gearbox/drivetrain loss Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 17, 2007 09:12am
rrimportracer Reg'd: Feb 28, 2006 Godlike Advisor	thanks web, your the man, lol myspace.com/asphalt_photos check us out!!!
[#] Jan 17, 2007 11:34am
Web Reg'd: Apr 17, 2006 THE SHADOW	haha, just keep asking questions and i'll keep adding to the list above Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 17, 2007 11:50am
iluvmyTypeS Reg'd: Aug 24, 2006 Master Mechanic	lol=laughing out loud
[#] Jan 17, 2007 05:18pm
Web Reg'd: Apr 17, 2006 THE SHADOW	^^ haha, added. Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 17, 2007 06:57pm
CaliRow Reg'd: May 21, 2005 Scion Guru	FYI... i know what it is, just want to add to the thread. Oh and WTF
[#] Jan 17, 2007 08:36pm
Web Reg'd: Apr 17, 2006 THE SHADOW	Added Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 17, 2007 08:38pm
MrScion07 Reg'd: Sep 09, 2006 Godlike Advisor	what do u mean careful 56K that the size of the pictures and why do we have to b so careful they take longer to load?
[#] Jan 21, 2007 03:42pm
CaliRow Reg'd: May 21, 2005 Scion Guru	MrScion07 wrote: what do u mean careful 56K that the size of the pictures and why do we have to b so careful they take longer to load? Some people with older/slower processors could open the window and be swarmed by the load of the files. I would take forever to load the page and could freeze the computer.
[#] Jan 21, 2007 04:23pm
Web Reg'd: Apr 17, 2006 THE SHADOW	Thanks Calirow Ignorance is bliss....305 fo life!...haha...Poser
[#] Jan 21, 2007 06:34pm
aDelcoTc Reg'd: Jan 25, 2007 Scion Guru	Web wrote: NOS is also considered a form of forced induction, like a turbo or S/C. ITB = independant throttle bodies OEM = original equipment remanufactured Any others, please add on ITB= Individual TB's oem= original equipment manufacturer Scion tc: Its essentially a 2 door Camry that spins up the tires quicker.....
[#] Feb 09, 2007 10:39am
Web Reg'd: Apr 17, 2006 THE SHADOW	Nice catch...my bad Ignorance is bliss....305 fo life!...haha...Poser
[#] Feb 09, 2007 10:47am
Mayo Reg'd: Feb 14, 2007 *The Guru*	Im pretty sure Iv seen "FS" written a few times. Whats that mean? "gonna wash my car before i take a nap.. can't rest well knowing i've got the entire cast of A Bug's Life on my bumper" - Vicious -- Want to post a "For Sale" thread? Check out the rules first.
[#] Feb 21, 2007 11:32pm

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