airbox / intercooler questions
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airbox / intercooler questions
I apologize if these have been covered before. I have searched and have not found answers... and I am spending way too much time searching this forum at work. :-)
1) It appears that the airbox's sole source of air is via the crossover duct to the intercooler, which serves to pull air through the intercooler for heat exchange, right? IF those observations are accurate, then I would think that open intakes and/or airbox mods would diminish or completely eliminate the airflow through the intercooler. If so, these mods must be quite detrimental to intercooler efficiency?
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing?
1) It appears that the airbox's sole source of air is via the crossover duct to the intercooler, which serves to pull air through the intercooler for heat exchange, right? IF those observations are accurate, then I would think that open intakes and/or airbox mods would diminish or completely eliminate the airflow through the intercooler. If so, these mods must be quite detrimental to intercooler efficiency?
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing?
#2
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Re: airbox / intercooler questions
Originally posted by zullo
1) It appears that the airbox's sole source of air is via the crossover duct to the intercooler, which serves to pull air through the intercooler for heat exchange, right? IF those observations are accurate, then I would think that open intakes and/or airbox mods would diminish or completely eliminate the airflow through the intercooler. If so, these mods must be quite detrimental to intercooler efficiency?
1) It appears that the airbox's sole source of air is via the crossover duct to the intercooler, which serves to pull air through the intercooler for heat exchange, right? IF those observations are accurate, then I would think that open intakes and/or airbox mods would diminish or completely eliminate the airflow through the intercooler. If so, these mods must be quite detrimental to intercooler efficiency?
The stock airbox and intercooler use the same duct for air flow. Mazda found that under hard acceleration and use that air would flow backwards, i.e., from the engine bay back through the intercooler causing a complete heat soak resulting in detonation and engine failure. This is why the stock setup can be detrimental to the intercoolers efficiency. This was corrected in later Japanese models but unfortunately it came to late for the US market issue cars. This is why separating the intake from the intercooler is one of the functions of most intake mods and after market air boxes (there are exceptions, i.e., PFS).
Originally posted by zullo
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing?
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing?
Sincerely,
Jason C. Williams
#3
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Re: airbox / intercooler questions
Originally posted by zullo
[B
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing? [/B]
[B
2) What is the hose that exits the side of the airbox that goes nowhere? If that hose is left open by design, then it is pulling unfiltered air into the airbox.
What am I missing? [/B]
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Okay, I'm obviously very confused. Sorry. It appears to me that the airbox pulls all of its air through the crossover duct. The only other hole in that duct is to the front side of the intercooler. The shroud on the front side of the intercooler has no other significant openings, so we are effectively pulling all intake air across the intercooler, out of the engine compartment (?) If not, how is air moved across the intercooler with no fan or surface exposed to fresh air?
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some stuff
The air enters a duct in the nose of the car. This leads to the air box duct which is before the intercooler. Forced air enters that duct. The passage toward the battery side is moving cool air over the battery and ac component.
I plugged the duct toward the battery side. ( don't use AC other than to lubricate system now and again, have small battery with warranty) I also made foam gaskets for the removable duct which leads from the forced air intake to the air box. The original smaller diameter rubber gasket which connects to the air box has been rolled inward to enlarge the duct size.
intake mod picture
I'm not sure if my home made modification is as good as some aftermarket intakes, but it definitely does a better job of forcing air into the air box over just leaving things assembled as stock. It would seem the more forced nose air, the more it aids the turbos ability to pull air with less effort. The faster the car is moving the more air it will force air.
I plugged the duct toward the battery side. ( don't use AC other than to lubricate system now and again, have small battery with warranty) I also made foam gaskets for the removable duct which leads from the forced air intake to the air box. The original smaller diameter rubber gasket which connects to the air box has been rolled inward to enlarge the duct size.
intake mod picture
I'm not sure if my home made modification is as good as some aftermarket intakes, but it definitely does a better job of forcing air into the air box over just leaving things assembled as stock. It would seem the more forced nose air, the more it aids the turbos ability to pull air with less effort. The faster the car is moving the more air it will force air.
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Originally posted by zullo
Okay, I'm obviously very confused. Sorry. It appears to me that the airbox pulls all of its air through the crossover duct. The only other hole in that duct is to the front side of the intercooler. The shroud on the front side of the intercooler has no other significant openings, so we are effectively pulling all intake air across the intercooler, out of the engine compartment (?) If not, how is air moved across the intercooler with no fan or surface exposed to fresh air?
Okay, I'm obviously very confused. Sorry. It appears to me that the airbox pulls all of its air through the crossover duct. The only other hole in that duct is to the front side of the intercooler. The shroud on the front side of the intercooler has no other significant openings, so we are effectively pulling all intake air across the intercooler, out of the engine compartment (?) If not, how is air moved across the intercooler with no fan or surface exposed to fresh air?
#7
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Originally posted by zullo
Okay, I'm obviously very confused. Sorry. It appears to me that the airbox pulls all of its air through the crossover duct. The only other hole in that duct is to the front side of the intercooler. The shroud on the front side of the intercooler has no other significant openings, so we are effectively pulling all intake air across the intercooler, out of the engine compartment (?) If not, how is air moved across the intercooler with no fan or surface exposed to fresh air?
Okay, I'm obviously very confused. Sorry. It appears to me that the airbox pulls all of its air through the crossover duct. The only other hole in that duct is to the front side of the intercooler. The shroud on the front side of the intercooler has no other significant openings, so we are effectively pulling all intake air across the intercooler, out of the engine compartment (?) If not, how is air moved across the intercooler with no fan or surface exposed to fresh air?
https://www.rx7club.com/forum/showth...hreadid=121491
Let me know if you are interested in the airbox mod.
Adam
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my bad. In the less-than-perfect light of my garage I would have sworn that the shroud on the front side of
the intercooler was sealed (besides the square opening to the crossover duct). Hence the confusion. It certainly makes more sense that we are not (intentionally) drawing hot air through the intercooler as our intake air.
the intercooler was sealed (besides the square opening to the crossover duct). Hence the confusion. It certainly makes more sense that we are not (intentionally) drawing hot air through the intercooler as our intake air.
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