Air Intake Hose Question?????
June-24th-2003, 06:51 PM
#1
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Air Intake Hose Question?????
Hey guys,
Im upgrading my 90' 323 BP SOHC and need some information. I'm currently making an air intake tube out of aluminium to replace the standard rubber one with the resonance chamber. The tube will connect straight from the throttle body to the VAF sensor and this way I can get rid of the ugly resonance chamber as well.
The question is can anyone tell me what the reducer on the standard intake hose is designed to do? Ive been told that it is used to quiten the intake noise but im not sure.
Any help would be most appreciated.
Thanks
Im upgrading my 90' 323 BP SOHC and need some information. I'm currently making an air intake tube out of aluminium to replace the standard rubber one with the resonance chamber. The tube will connect straight from the throttle body to the VAF sensor and this way I can get rid of the ugly resonance chamber as well.
The question is can anyone tell me what the reducer on the standard intake hose is designed to do? Ive been told that it is used to quiten the intake noise but im not sure.
Any help would be most appreciated.
Thanks
June-24th-2003, 08:26 PM
#2
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Location: Huntington Beach, CA Uhhh Surfs up Dude
Posts: 2,367
by removing the Hbox you will also lose about 2-4ft.lbs of torque....
not sure what you mean by the reducer though....the stock air box has a few silencer chambers as well as that long thing just above the radiator. All that comes out when you remove the stock air box.
not sure what you mean by the reducer though....the stock air box has a few silencer chambers as well as that long thing just above the radiator. All that comes out when you remove the stock air box.
June-24th-2003, 08:51 PM
#3
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By removing the resonator box is that loss of torque really all that noticeable?
The reducer is on the stock intake tube. As the tube comes off the resonator box the tube looks as though it goes narrower then fattens up again.
The reducer is on the stock intake tube. As the tube comes off the resonator box the tube looks as though it goes narrower then fattens up again.
June-25th-2003, 04:31 PM
#5
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Here's a question. I have heard the reference to the resonance and H-box many times, but don't know what they are. Which is the long thingy attatched to the airbox, and which is the boxy thingamabobber on the flexible intake pipe between throttle body and VAF?
June-25th-2003, 08:30 PM
#6
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Location: Huntington Beach, CA Uhhh Surfs up Dude
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the hbox (directly behind the VAF attached to the rubber stock tube, regulates the air pulses into the intake. Which makes for better velocity and a better air/fuel mix.
the long tube above the radiator, is i believe used for 2 things, 1, a silencer to quiet the intake noise and to heat the air, why it heats the air, i have no idea which hurts performance.
but all in all, you'll have more torque (low end) with the stock air box fully intact than with a cone filter. So if you do mainly street driving low end is a good thing. If your foot is nailed to the floor constantly or you drag race, it won't matter much as the gains from an intake tube and cone filter will benefit more on the top end.
I tested my intakes with and without the hobx. I did notice better "out of corner" umph with the hbox. Merely a seat of the pants dyno test, but it did help.
the long tube above the radiator, is i believe used for 2 things, 1, a silencer to quiet the intake noise and to heat the air, why it heats the air, i have no idea which hurts performance.
but all in all, you'll have more torque (low end) with the stock air box fully intact than with a cone filter. So if you do mainly street driving low end is a good thing. If your foot is nailed to the floor constantly or you drag race, it won't matter much as the gains from an intake tube and cone filter will benefit more on the top end.
I tested my intakes with and without the hobx. I did notice better "out of corner" umph with the hbox. Merely a seat of the pants dyno test, but it did help.
June-25th-2003, 11:52 PM
#7
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Join Date: Jul 2002
Location: Grand Forks ND
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Originally posted by mazdaspeedwest
the hbox (directly behind the VAF attached to the rubber stock tube, regulates the air pulses into the intake. Which makes for better velocity and a better air/fuel mix.
the long tube above the radiator, is i believe used for 2 things, 1, a silencer to quiet the intake noise and to heat the air, why it heats the air, i have no idea which hurts performance.
but all in all, you'll have more torque (low end) with the stock air box fully intact than with a cone filter. So if you do mainly street driving low end is a good thing. If your foot is nailed to the floor constantly or you drag race, it won't matter much as the gains from an intake tube and cone filter will benefit more on the top end.
I tested my intakes with and without the hobx. I did notice better "out of corner" umph with the hbox. Merely a seat of the pants dyno test, but it did help.
the hbox (directly behind the VAF attached to the rubber stock tube, regulates the air pulses into the intake. Which makes for better velocity and a better air/fuel mix.
the long tube above the radiator, is i believe used for 2 things, 1, a silencer to quiet the intake noise and to heat the air, why it heats the air, i have no idea which hurts performance.
but all in all, you'll have more torque (low end) with the stock air box fully intact than with a cone filter. So if you do mainly street driving low end is a good thing. If your foot is nailed to the floor constantly or you drag race, it won't matter much as the gains from an intake tube and cone filter will benefit more on the top end.
I tested my intakes with and without the hobx. I did notice better "out of corner" umph with the hbox. Merely a seat of the pants dyno test, but it did help.
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