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Discussion Starter #1
everytime i ask a question about mods u guys tell me to search this and search that. i have already searched those words and the threads the search finds dont say what those products r or what they do, the threads r just asking which company makes the best, how much they cost, how much hp gain it does, anyone have it, should i get one, where to get it, etc. the threads dont actually say what those products r and what they do and how they work.
 

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What's your question?

Air intake -improves air fuel mixture, allowing more air into the combustion chamber for better combustion and a little bit of sound.

Exhaust - designed correctly helps eliminate exhaust gases from the car faster than a stock exhaust system. Exhaust gases sit in the pipes and create pressure. The engine has to spend power to push this gas out.

Supercharger -Uses engine power to compress air. With compressed air you are able to put more air in the engine using the same amount of volume.

Turbo - Uses heat from the exhaust to compress air into the engine.
 

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Originally posted by SophieSleeps:
What's your question?

Air intake -improves air fuel mixture, allowing more air into the combustion chamber for better combustion and a little bit of sound.

Exhaust - designed correctly helps eliminate exhaust gases from the car faster than a stock exhaust system. Exhaust gases sit in the pipes and create pressure. The engine has to spend power to push this gas out.

Supercharger -Uses engine power to compress air. With compressed air you are able to put more air in the engine using the same amount of volume.

Turbo - Uses heat from the exhaust to compress air into the engine.

KUDOS
 

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Discussion Starter #4
Originally posted by SophieSleeps:
What's your question?

Air intake -improves air fuel mixture, allowing more air into the combustion chamber for better combustion and a little bit of sound.

Exhaust - designed correctly helps eliminate exhaust gases from the car faster than a stock exhaust system. Exhaust gases sit in the pipes and create pressure. The engine has to spend power to push this gas out.

Supercharger -Uses engine power to compress air. With compressed air you are able to put more air in the engine using the same amount of volume.

Turbo - Uses heat from the exhaust to compress air into the engine.

THANK YOU FINALLY SOMEONE THATS WILLING TO HELP!!!!!!

ok here we go. what do plp mean when they say they r getting a new exhaust system? what r exhuast tips, what do they do, how they work???? KN filters???? 5zigen exhuast???

and i always hear these civics and accords with these unusually deep roars when revved, is that the sound of the new exhaust systems or what?
 

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Originally posted by pure azn:
THANK YOU FINALLY SOMEONE THATS WILLING TO HELP!!!!!!

ok here we go. what do plp mean when they say they r getting a new exhaust system? what r exhuast tips, what do they do, how they work???? KN filters???? 5zigen exhuast???

and i always hear these civics and accords with these unusually deep roars when revved, is that the sound of the new exhaust systems or what?
a new exhaust system replaces the factory exhaust system...usually consists of all the metal tubing from the catalytic converter all the way to the muffler...

exhaust tips are those shiny round things at the back end of the car...they're attached to the muffler. this is where the exhaust gas comes out...

k&n is a company that makes air filters for motorized vehicles...

5zigen is a japanese manufacturer of automotive products...most of the 5zigen talk on this board are about their exhaust system...

hope this helps...

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2001 IS300 Graphite Grey
98 MB CLK 320 white
94 Supra TT/6-speed/HardTop/black
98 ZX7-R lime green...Team Green BABY!!!
 

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Discussion Starter #6
exhaust tips are those shiny round things at the back end of the car...they're attached to the muffler. this is where the exhaust gas comes out...

k&n is a company that makes air filters for motorized vehicles...
um yea...... that really helps. what do exhaust tips do and how do they work, same for filters
 

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i don't believe exhaust tips do anything at all besides get dirty.. they're just for show.. K&N makes air filters for cars.. they make flat, cone, etc.. these filters are attached to your intake which is attached to your throttle body.. they filtrate the dirty air..hence the name air filter.
 

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i hope u don't get mad for me asking pure azn... but do u have any prior knowledge or experience with modding cars?

>=|

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Silver 2001 IS300
RMM Intake
Carbon Fiber Dash Kit
Hella Blue Lights On Dash
 

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Man pureazn, you really don't know anything, but I guess its always good to start somewhere, exhaust tips are the same as chrome tips for your pipe, its just for show to turn your regular exhaust pipe into a shiny one. It only covers the tips of your exhaust. I suggest you jut go out and buy an issue of Import racer or Superstreet or something, you could probably find more general info from one of those magazines faster then you would through these posts.
 

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Originally posted by pure azn:
um yea...... that really helps. what do exhaust tips do and how do they work, same for filters
exhaust tips are mainly for cosmetics...looks...they're there to make the exhaust look nicer...

and dude...you never asked specifically what filters do...and if you don't know what an air filter is...you should really go back to school...i mean really...think about it. what does a filter do??? it filtrates right??? DUH...and what does it filtrate??? AIR!!!

it's okay to come on here and ask questions...BUT...when you ask...and someone answers DON'T BE A WISE ASS ABOUT IT... OKAY??? and think about SH!T before you ask a question...what does an air filter do??? c'mon...this makes me really think that you are just being a wise ass.

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2001 IS300 Graphite Grey
98 MB CLK 320 white
94 Supra TT/6-speed/HardTop/black
98 ZX7-R lime green...Team Green BABY!!!
 

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Who is the dumbsh1t that thinks if they heat up a turbo enough it will start spinning like crazy and produce boost? LMAO
 

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If you're talking about me Doug...I don't think I said anything quite like that.

I'm putting it in simple terms.
 

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The back pressure is desirable, it forces more air back into the cylinders during the pistons' intake stage - the air used in combustion comes from both the intake side and the exhaust side. A more free-flowing exhaust allows a higher back pressure - this is where you gain your power (if any).


Originally posted by SophieSleeps:
Exhaust - designed correctly helps eliminate exhaust gases from the car faster than a stock exhaust system. Exhaust gases sit in the pipes and create pressure. The engine has to spend power to push this gas out.
 

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I won't answer the exhaust tip question (duh), but a K&N filter is less restrictive than a paper (stock) filter, what it does is allows a higher (than stock) air mass flow rate into the engine, which combined with more fuel, produces more power, however you're limited by other factors, and the air mass flow rate is not likely limiting your power, so you should may see little or no gain from a K&N filter. In fact, many replacement air filters (cones etc) remove the stock air box which isolates the filter from engine heat. Higher temperature air has less mass, so it hurts rather than helps. A paper air filter also stops dust better than a K&N filter.
As for exhausts, the loud sound doesn't mean you have more power, just less noise reduction in the muffler. It's the catalytic converters that drain power more than the muffler.


Originally posted by pure azn:
um yea...... that really helps. what do exhaust tips do and how do they work, same for filters
 

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ckolsen, i'm not sure I agree with you.

If air is taken in both from the intake and the exhaust side, why would you "free up" more power if you created backpressure?

If your engine takes in spent exhaust gases then it would be less combustible than if it just took in normal air.

Why don't people just cap their exhaust tips then? Get a cap that will release at certain pressures. Then you get precise pressure all the time.

I wouldn't want to reroute the exhaust from my car back into the engine. I want that stuff out.


I don't know...you'll have to convince me and explain a little more about using exhaust gases for combustion.
 

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The back pressure is desirable, it forces more air back into the cylinders during the
pistons' intake stage - the air used in combustion comes from both the intake side
and the exhaust side.
wait...how does this happen??? when the "intake stage" occurs...the exhaust valves are closed. unless you have tons of overlap in the cam...which is usually not true.

A more free-flowing exhaust allows a higher back pressure -
this is where you gain your power (if any).
a more free flowing exhaust DECREASES back pressure...not increasing it...

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2001 IS300 Graphite Grey
98 MB CLK 320 white
94 Supra TT/6-speed/HardTop/black
98 ZX7-R lime green...Team Green BABY!!!


[This message has been edited by HyperMKIV (edited March 26, 2001).]
 

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Sorry, this (desirable back pressure) is probably true for carburated cars but not modern fuel injected (and computer controlled) systems. Removing or reducing the back pressure used to cause the air to become fuel lean, cause more air was coming into the cylinders. This would reduce power and eventually cause exhaust valve burning. Modern cars can adjust for lean mixtures.
So you're right, reducing the back pressure increases power since the pistons don't have expend energy to drive the air out. Some back pressure is probably still desirable. Maybe the point is that combustion 4 cycles are complicated and tinkering with them may not have the desired results.

Originally posted by SophieSleeps:
ckolsen, i'm not sure I agree with you.

If air is taken in both from the intake and the exhaust side, why would you "free up" more power if you created backpressure?

If your engine takes in spent exhaust gases then it would be less combustible than if it just took in normal air.

Why don't people just cap their exhaust tips then? Get a cap that will release at certain pressures. Then you get precise pressure all the time.

I wouldn't want to reroute the exhaust from my car back into the engine. I want that stuff out.


I don't know...you'll have to convince me and explain a little more about using exhaust gases for combustion.
 

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For the back pressure issue:

I know that the backpressure is desirable in the design of modern diesel engines. Right now a variable valve timing system is being designed for a diesel, but it turns out that when the valve timing is set to the low setting, there was too little pressure in the combustion chamber. This is bad because diesel engines detonate using pressure and not a spark. Anyhoo, to solve this problem, the designers decided to open up the exhaust valve so that the chamber filled with more air and therefore ignite properly.

For Pure azn:
I think that what you need is to look up how car engines work. Try going to www.howstuffworks.com and looking up combustion engines. After you find out how your engine works then you can start thinking about how to mod it.
 

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SophieSleeps,
In regard to your description of the "exhaust cap" that opens and closes when a certain amount/pressure of gases accumulate... I believe this is being used in the new Maxima SE.
Also, you are correct.. backpressure is not desirable in the IS300.

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2001 330ci Manual
(former IS300 owner)
 
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