1. - What is referred to as N/A?

2. - Why is it good?

 

N/A = Naturally Asperated

This is how all cars are usually from the factory, unless they have a turbo or supercharger (forced induction) or using Nitrous

 

wow i talk about aspiration all the time with a friend of mine who is an import driver (never knew what N/A ment now, kinda makes sense) so what does it mean to "tune it"

 

Naturally Aspirated = no type of help getting air into the motor.

Also known as 'All Motor'

Bottle fed, juiced = Nitrous

Blown, 'charged = Supercharger

Boosted = Turbo (Me/TechSmurf)

N/A:

Usually a very lumpy sounding engine. Requires good exhaust, large cam, high rpms, high compression.

Pros - Always there, very repeatable. Sounds simply bad ***.

Cons - Eats gas like no tomorrow (Large cube engines). Also have to use very high octane, for the higher (11:1+ on aluminum heads, 10:1+ on iron heads) compression ratios. High stress in the upper rpm ranges (6500+). Have to wait for the engine to get 'on the cam' (that's why most with large cams, also have to use high stall convertors, and higher numerical gearing)



SUPERCHARGER:

Use of a belt driven system to force air into the motor.

Roots style -

Pros = Instant boost response. Pretty cool, when it's sticking out of the hood (this is the most commonly known supercharger, mainly on carb'd motors) Don't have to mess with the exhaust at all.

Cons = Parasitic loss due engine having to turn the supercharger, often resulting in losses up to 100hp, but the supercharger gains back 300hp. (you end up with like 200hp over stock). Not as efficient as a centrifugal. Eats gas.

Centrifugal style -

Pros = Sleeper man! No knowing it's there (much like the newer roots style s/c) until you get on it, and you hear the whining. Can get a totally self contained unit (ProCharger). More efficient than the roots style. With a bypass valve, you can stop the supercharger from building boost in all but WOT situations, extending your gas mileage when not on it. Don't have to mess with the exhaust at all.

Cons = More expensive (to my knowledge). Also have to build custom bracketry (unless a kit is available). Still with large parasitic losses (although not to the extent of the roots style).



NITROUS:

Chemically inserting oxygen into the cylinder via a nitrogen carrier (n2o), in liquid form, and cooling the intake rapidly, creating a denser air/fuel mixture in the cylinder.

Wet system:
Includes the needed fuel - safer system, but I'm not sure you can get over like 150/200 shot on a wet system...

Dry system:
You have to add the needed fuel yourself.

Pros:
Easiest to implement. Cheapest, as well. Instant power, at the push of a button!! It's like getting kicked in the rear by *** Himself when you hit the go juice! Car drives like normal, then hit the button, and away you go!

Cons:
Refilling the bottle. Can be very dangerous to your engine, if you aren't careful with it - hitting the nitrous too quickly (like @ 1500rpm) will murder your motor. Not having any extra fuel (on a dry system) will lean burn your pistons.



TURBOCHARGER:

An impeller driven from a shaft via turbine spinning from the exhaust gases.

Pros: Very efficient. Only there when you get on it, so gas mileage doesn't suffer... Your car will be just like normal, until you get on it, and force the air into it.

Cons: Very difficult to implement. You have to route the exhaust gases to the turbine, then route it back out the car, as well as routing the intake side, to/from the intercooler (if used).


All methods of forced induction (Nitrous, Supercharger, Turbo) will create more torque than N/A, due to the denser (longer burning, creates more torque over a longer crankshaft throw) air mixture.

Meh. No idea why I typed this all up. Hope it helps someone!

 

thank you very much, it did help me alot actually cleard up alot of questions, actually you could have put that on my other post (the one that turned into a big arguement) but neverthelss it works for my brain and in terms i can understand.

 

Tune it is when import guys give there car to some one else to work on it when they don't know how to fix it or have the tools.
It realy means pay some one to work on it, it could be to work on ignition troubles, install a tach or put on new plugs and wires, get an aliglinement. It makes regular matenence sound cool most of the time.
Guys on base in japan say " I got my car tuned at _____ (a break and mufler place)" they sound so dumb.
I have yet to here some one say "I got my car tuned at wal-mart".

 

Are you sure about this? Because roots/screw-type SCs are fixed displacement pumps, whereas the centrifugal is non-fixed displacement.

 

youi must be thinking of a Whipple-charger

 

Whipple-charger? Come again?