WHEN IS IT TO MUCH AIR........
03-09-2007, 05:05 AM
#11
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Join Date: Mar 2007
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Posts: 434
RE: WHEN IS IT TO MUCH AIR........
2000GT 4.6,
So, what you are saying if the air filter gets to much air or left out in the open, it should not cause an engine stall?
As you can tell im a newbe moterhead so i need all the advice and theories i can get.
And no i don't have a boost/vacum guage handy.
So, what you are saying if the air filter gets to much air or left out in the open, it should not cause an engine stall?
As you can tell im a newbe moterhead so i need all the advice and theories i can get.And no i don't have a boost/vacum guage handy.
03-09-2007, 06:48 AM
#12
6th Gear Member
Join Date: Jan 2004
Location: United States
Posts: 12,575
RE: WHEN IS IT TO MUCH AIR........
ORIGINAL: NORMAN99
2000GT 4.6,
So, what you are saying if the air filter gets to much air or left out in the open, it should not cause an engine stall?As you can tell im a newbe moterhead so i need all the advice and theories i can get.
And no i don't have a boost/vacum guage handy.
2000GT 4.6,
So, what you are saying if the air filter gets to much air or left out in the open, it should not cause an engine stall?
As you can tell im a newbe moterhead so i need all the advice and theories i can get.And no i don't have a boost/vacum guage handy.
The MAF reads how much air is going in, and the computer sets the fuel accordingly. You should not be having stall/idle problems while rolling with the clutch in.
You would have to acutally pressurise the air in the intake to acutally force more air into the engine, which is not going to happen with a ram air intake.
In any case, pressure or no, the MAF is going to read how much air is acutally getting into the engine and adjust accordingly.
As stated, the C&L setups have NOTHING between the meter and the filter. You cannot run anything bigger than that... since there is literally nothing between the maf and the filter. The MAF does not need to be changed due to changes in the intake tract before the maf.
03-09-2007, 10:51 AM
#13
Join Date: Mar 2007
Posts: 20
RE: WHEN IS IT TO MUCH AIR........
2000GT4.6
Beleive what you want, but the fact is Ram Air setups can cause problems. I've experienced it, and I've seen others experience it. The problem is this, the MAF senses how much air passes thru it. Any excess pressure aft of the MAF will causereverse flow thru the MAF. So, the result is that the MAF's airflow countsoscillate (go from high to low). This occurs during steady state operation and when coasting down to a stop with the clutch pedal depressed.
The engine can only use so much air, so when the air pressure in the intake tractis to high, the flow backs up. It's simple physics that can be seen if you have the ability to do real time datalogging.
Beleive what you want, but the fact is Ram Air setups can cause problems. I've experienced it, and I've seen others experience it. The problem is this, the MAF senses how much air passes thru it. Any excess pressure aft of the MAF will causereverse flow thru the MAF. So, the result is that the MAF's airflow countsoscillate (go from high to low). This occurs during steady state operation and when coasting down to a stop with the clutch pedal depressed.
The engine can only use so much air, so when the air pressure in the intake tractis to high, the flow backs up. It's simple physics that can be seen if you have the ability to do real time datalogging.
03-09-2007, 01:49 PM
#14
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RE: WHEN IS IT TO MUCH AIR........
Isn't the concept simple, like so: If you have air when you expect it, things work like usual. Say you have a blower making several pounds of boost. When you hit the gas (expecting air) you build boost and everything is great. What happens when you let off the gas? I honestly have no idea how forced induction works, but I'm assuming that when you let off the throttle (meaning you want to enter the idling state) you need to get rid of this excess boost (air) and therefore there is some boost blow-off valve or something of that nature that gets ride of this now unwanted boost. Am I correct so far? If I'm right then, then with this ram-air set-up, I'm assuming that the same applies, in that if you have excess air coming in when you don't want it (throttle is not depressed) then you can experience surging or whatever weird things might happen when the computer is reading air but the throttle is in fact not depressed.
**Then again, how much air could possibly be coming in via a ram-air system if you are not going, say, in excess of 50mph? I'm assuming not very much.
**Then again, how much air could possibly be coming in via a ram-air system if you are not going, say, in excess of 50mph? I'm assuming not very much.
03-09-2007, 02:13 PM
#15
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Join Date: Sep 2006
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RE: WHEN IS IT TO MUCH AIR........
ORIGINAL: TheMustangLoveR
Isn't the concept simple, like so: If you have air when you expect it, things work like usual. Say you have a blower making several pounds of boost. When you hit the gas (expecting air) you build boost and everything is great. What happens when you let off the gas? I honestly have no idea how forced induction works, but I'm assuming that when you let off the throttle (meaning you want to enter the idling state) you need to get rid of this excess boost (air) and therefore there is some boost blow-off valve or something of that nature that gets ride of this now unwanted boost. Am I correct so far? If I'm right then, then with this ram-air set-up, I'm assuming that the same applies, in that if you have excess air coming in when you don't want it (throttle is not depressed) then you can experience surging or whatever weird things might happen when the computer is reading air but the throttle is in fact not depressed.
**Then again, how much air could possibly be coming in via a ram-air system if you are not going, say, in excess of 50mph? I'm assuming not very much.
Isn't the concept simple, like so: If you have air when you expect it, things work like usual. Say you have a blower making several pounds of boost. When you hit the gas (expecting air) you build boost and everything is great. What happens when you let off the gas? I honestly have no idea how forced induction works, but I'm assuming that when you let off the throttle (meaning you want to enter the idling state) you need to get rid of this excess boost (air) and therefore there is some boost blow-off valve or something of that nature that gets ride of this now unwanted boost. Am I correct so far? If I'm right then, then with this ram-air set-up, I'm assuming that the same applies, in that if you have excess air coming in when you don't want it (throttle is not depressed) then you can experience surging or whatever weird things might happen when the computer is reading air but the throttle is in fact not depressed.
**Then again, how much air could possibly be coming in via a ram-air system if you are not going, say, in excess of 50mph? I'm assuming not very much.
03-09-2007, 11:32 PM
#16
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Join Date: Mar 2007
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RE: WHEN IS IT TO MUCH AIR........
Maybe i have an issue with my blow back pressure.? On my intake hose thereare two tubes comming off of it which could be for the blow back pressure. I have already changed my throttle position sensor and no joy.
03-10-2007, 12:18 AM
#18
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Posts: 1,271
RE: WHEN IS IT TO MUCH AIR........
ORIGINAL: oxfordgt
Those 2 tubes are for your pcv and iac. Have you tried cleaning your iac?
Those 2 tubes are for your pcv and iac. Have you tried cleaning your iac?
BTW, he said he has a "functional hood scoop" not RAM air, and he opened the fenderwell, so basically at a stop he wouldnt get any more air than a stock setup...