A/C and Air pump performance hits
#11
07-07-2007, 11:18 PM
RE: A/C and Air pump performance hits
ORIGINAL: 78buckshot
Hey cwb, 73shark is describing the steel nipples that carry the A.I.R. air deeper into the exhaust manifold, their aimed at the port in the head to maximize the oxidation process of the gases. The stainless steel injector manifold mates to the exhaust manifold with inverted flare fittings and seats the flare to another short nipple inside the cast iron exhaust manifold. This is about as well as I can describe it.
Hey cwb, 73shark is describing the steel nipples that carry the A.I.R. air deeper into the exhaust manifold, their aimed at the port in the head to maximize the oxidation process of the gases. The stainless steel injector manifold mates to the exhaust manifold with inverted flare fittings and seats the flare to another short nipple inside the cast iron exhaust manifold. This is about as well as I can describe it.
So they won't dispel heat if there's no flow???
So put on an underdrive wheel in the pump? Keep some flow, save power...
#12
07-07-2007, 11:25 PM
RE: A/C and Air pump performance hits
ORIGINAL: C3 Starship
I believe that you'll find that the air pump draws from the filtered air from your air cleaner, not push air in. (this line is inside your filtered area)Although a hose from your air cleaner does draw air from your valve cover, through the pcv valve inthe valve cover,to burn internal engine gasses. (this line is outside your filtered area)
I believe that you'll find that the air pump draws from the filtered air from your air cleaner, not push air in. (this line is inside your filtered area)Although a hose from your air cleaner does draw air from your valve cover, through the pcv valve inthe valve cover,to burn internal engine gasses. (this line is outside your filtered area)
Yes, the other line would need filtering, to go into the crankcase, for Positive Crankcase Ventilation, but the other?
#13
07-07-2007, 11:47 PM
RE: A/C and Air pump performance hits
ORIGINAL: 78buckshot
Hey cwb, 73shark is describing the steel nipples that carry the A.I.R. air deeper into the exhaust manifold, their aimed at the port in the head to maximize the oxidation process of the gases. The stainless steel injector manifold mates to the exhaust manifold with inverted flare fittings and seats the flare to another short nipple inside the cast iron exhaust manifold. This is about as well as I can describe it.
Hey cwb, 73shark is describing the steel nipples that carry the A.I.R. air deeper into the exhaust manifold, their aimed at the port in the head to maximize the oxidation process of the gases. The stainless steel injector manifold mates to the exhaust manifold with inverted flare fittings and seats the flare to another short nipple inside the cast iron exhaust manifold. This is about as well as I can describe it.
#14
07-08-2007, 06:03 AM
RE: A/C and Air pump performance hits
Looks like we all agree on the A.I.R. and it's operation, if you disable the pump your not going to see one bit of performance improvement, if it were mine I would leave all of the emission controls on and concentrate on getting it back to stock so that you can diagnose it better. The other option I would consider given the somewhat poor performance history of the twin TBI would be to gut the factory EFI and go with either an after-market injection system or carbueration, this way you wouldn't have any interference or need of the emmision controls.
#15
07-08-2007, 11:19 AM
RE: A/C and Air pump performance hits
ORIGINAL: cwb
Why would theAIR pumpneed filtered air to go into the exhaust plumbing?
Yes, the other line would need filtering, to go into the crankcase, for Positive Crankcase Ventilation, but the other?
ORIGINAL: C3 Starship
I believe that you'll find that the air pump draws from the filtered air from your air cleaner, not push air in. (this line is inside your filtered area)Although a hose from your air cleaner does draw air from your valve cover, through the pcv valve inthe valve cover,to burn internal engine gasses. (this line is outside your filtered area)
I believe that you'll find that the air pump draws from the filtered air from your air cleaner, not push air in. (this line is inside your filtered area)Although a hose from your air cleaner does draw air from your valve cover, through the pcv valve inthe valve cover,to burn internal engine gasses. (this line is outside your filtered area)
Yes, the other line would need filtering, to go into the crankcase, for Positive Crankcase Ventilation, but the other?
The filtered air is to protect the pump, that draws air from the filtered side of the air cleaner, the line from the pvc valve draws air from the crank case, to burn gasses from the inside of the engine. This air is filtered, to keep particulates out of the intake system.
#17
07-08-2007, 01:51 PM
RE: A/C and Air pump performance hits
O.K., I'm goin' to back up.....
The Air Injection Pump, with an integral filter, compresses the air and injects it through the air manifolds and tubes into the exhaust system in the area of the exhaust valves. The fresh air helps burn the unburned portion of the exhaust gases in the exhaust system, thus minimizing exhaust contaminations.
A check valve prevents exhaust gases from entering and damaging the air injection pump, as back flow can occur even under normal operating conditions. So, IMO, you should not have air blowing into the air cleaner from the smog,or air pump.
I took this direct from my manual. I'll detail more, if you feel it will help.
The Air Injection Pump, with an integral filter, compresses the air and injects it through the air manifolds and tubes into the exhaust system in the area of the exhaust valves. The fresh air helps burn the unburned portion of the exhaust gases in the exhaust system, thus minimizing exhaust contaminations.
A check valve prevents exhaust gases from entering and damaging the air injection pump, as back flow can occur even under normal operating conditions. So, IMO, you should not have air blowing into the air cleaner from the smog,or air pump.
I took this direct from my manual. I'll detail more, if you feel it will help.
#18
07-08-2007, 08:41 PM
RE: A/C and Air pump performance hits
There is also a vacuum controlled dump valve that dumps most of the air under high vacuum conditions like closed throttle. This prevents exhaust backfiring. There's a muffler on the back of the AIR pump that is the dump exhaust. Maybe that's the air he's referring to.
#19
07-08-2007, 11:08 PM
RE: A/C and Air pump performance hits
How does the air pump not affect the air/fuel ratio the O2 sensor is measuring? The volume and oxygen content would change with environment, rpm and pump wear. Therefore, the emissions system could not expect (subtract) a constant or linear adder of oxygenresulting from the pump.
#20
07-09-2007, 05:13 AM
RE: A/C and Air pump performance hits
That's a real good question Batmobile, something that I don't have the answer for. As a test, you could pull the belt off and run the car on a city/highway test loop and see if the computer has any complaints.