This is what your AIR injection system looks like
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
This is what your AIR injection system looks like
I was out in the garage and was playing with some of my old parts and I decided to reconstruct the AIR system found on our cars. This is off a 1990 305 TBI but I am pretty sure that it is the same for TPI cars as well. I should have a few btter pics later on because this camera I have is pure garbage.
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Car: 1988 Trans Am
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Transmission: 5 spd
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What is the purpose of the "Diverter Valve"??? I have been reading about if it(A.I.R.) is nessesary to have to pass emissions. I know it is needed to pass visual( i dont have a visual) but is it needed for the siffer??????
btw..thanks for the pics (i know its gonna help me sometime)
btw..thanks for the pics (i know its gonna help me sometime)
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Originally posted by Pepsicola
What is the purpose of the "Diverter Valve"??? I have been reading about if it(A.I.R.) is nessesary to have to pass emissions. I know it is needed to pass visual( i dont have a visual) but is it needed for the siffer??????
btw..thanks for the pics (i know its gonna help me sometime)
What is the purpose of the "Diverter Valve"??? I have been reading about if it(A.I.R.) is nessesary to have to pass emissions. I know it is needed to pass visual( i dont have a visual) but is it needed for the siffer??????
btw..thanks for the pics (i know its gonna help me sometime)
if im wrong, someone please correct me:
the orignal factory cats needed O2 to work properly.... the problem is, all the O2 is used if the motor is running properly. so they solved this issue by pumping air directly into the cat.
when the computer decides the cat needs air, it uses the diverter valve to divert the air into the cat.
i think thats right...
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Car: '90 RS
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Originally posted by MrDude_1
if im wrong, someone please correct me:
the orignal factory cats needed O2 to work properly.... the problem is, all the O2 is used if the motor is running properly. so they solved this issue by pumping air directly into the cat.
when the computer decides the cat needs air, it uses the diverter valve to divert the air into the cat.
i think thats right...
if im wrong, someone please correct me:
the orignal factory cats needed O2 to work properly.... the problem is, all the O2 is used if the motor is running properly. so they solved this issue by pumping air directly into the cat.
when the computer decides the cat needs air, it uses the diverter valve to divert the air into the cat.
i think thats right...
#7
In 2005, my state is going to OBD2 emissions testing only, which means any car 1997 and older won't be required to have an emissions test, not even a tailpipe. If I remove the AIR stuff and leave the cat, plug the AIR tube on it, will it hurt the cat at all?? Does it need that to work properly? Just wondering.
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Car: '90 RS
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Originally posted by 3rdgenstm
In 2005, my state is going to OBD2 emissions testing only, which means any car 1997 and older won't be required to have an emissions test, not even a tailpipe. If I remove the AIR stuff and leave the cat, plug the AIR tube on it, will it hurt the cat at all?? Does it need that to work properly? Just wondering.
In 2005, my state is going to OBD2 emissions testing only, which means any car 1997 and older won't be required to have an emissions test, not even a tailpipe. If I remove the AIR stuff and leave the cat, plug the AIR tube on it, will it hurt the cat at all?? Does it need that to work properly? Just wondering.
#9
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Good info. I just did this today. Took me all of 15 minutes max to get everything out. Ofcourse I only removed the air stuff, and not the manifolds and stuff like you. I've read before where a lot of people have problems with this, but this was honestly one of the easiest mods I have done to my car. I didn't even have problems with the torx bits. I even used the stock belt because I have the smog delete pulley and everything looks factory.
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Car: '90 RS
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Originally posted by 25THRSS
Good info. I just did this today. Took me all of 15 minutes max to get everything out. Ofcourse I only removed the air stuff, and not the manifolds and stuff like you. I've read before where a lot of people have problems with this, but this was honestly one of the easiest mods I have done to my car. I didn't even have problems with the torx bits. I even used the stock belt because I have the smog delete pulley and everything looks factory.
Good info. I just did this today. Took me all of 15 minutes max to get everything out. Ofcourse I only removed the air stuff, and not the manifolds and stuff like you. I've read before where a lot of people have problems with this, but this was honestly one of the easiest mods I have done to my car. I didn't even have problems with the torx bits. I even used the stock belt because I have the smog delete pulley and everything looks factory.
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Car: '90 RS
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Here is a front view of the smog pmup with the pulley removed. You can see the two bolt holes where it attaches to the accessory bracket.
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Car: FBODYS
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Axle/Gears: RUSTY AND BRAND NEW
I want to know power gains by removing the a.i.r. pump and cat. Baisicly all the smog stuff. There is no smog tests where I live.
Last edited by VERTIGO Z28; 03-28-2004 at 09:06 PM.
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Car: 1987 Camaro Z28 IROC-Z
Engine: 5.7L TPI
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Axle/Gears: 3.42:1
Originally posted by KEVIN L.
I want to know power gains by removing the a.i.r. pump and cat. Baisicly all the smog stuff. There is no smog tests where I live.
I want to know power gains by removing the a.i.r. pump and cat. Baisicly all the smog stuff. There is no smog tests where I live.
Gains? .0021 RWHP. Seriously, nothing worth mentioning or hacking up a car for, let alone smell!
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Car: '90 RS
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Originally posted by ES87iroc
Gains? .0021 RWHP. Seriously, nothing worth mentioning or hacking up a car for, let alone smell!
Gains? .0021 RWHP. Seriously, nothing worth mentioning or hacking up a car for, let alone smell!
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At this point in the game I want it to look clean and run a little easier. I'm not lookin to gain alot of HP from this mod I was just curious. When I stand and look at it I can visualize the bay without it and I think it would improve the amount of working area.
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Originally posted by 25THRSS
Good info. I just did this today. Took me all of 15 minutes max to get everything out. Ofcourse I only removed the air stuff, and not the manifolds and stuff like you. I've read before where a lot of people have problems with this, but this was honestly one of the easiest mods I have done to my car. I didn't even have problems with the torx bits. I even used the stock belt because I have the smog delete pulley and everything looks factory.
Good info. I just did this today. Took me all of 15 minutes max to get everything out. Ofcourse I only removed the air stuff, and not the manifolds and stuff like you. I've read before where a lot of people have problems with this, but this was honestly one of the easiest mods I have done to my car. I didn't even have problems with the torx bits. I even used the stock belt because I have the smog delete pulley and everything looks factory.
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gmpartsdirect.com I can't remember the part # right now, but do a search for smog pump delete pulley. I wanna say it's 10186167, but it's been a while now.
#20
Just so im sure on this. Are you guy's sayin it will do no damage or hurt performance if I remove the smog pump, diverter valve, then plug the converter connection? I would love to create a bit of space under the hood of my GTA.
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Car: '90 RS
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Originally posted by vance
Just so im sure on this. Are you guy's sayin it will do no damage or hurt performance if I remove the smog pump, diverter valve, then plug the converter connection? I would love to create a bit of space under the hood of my GTA.
Just so im sure on this. Are you guy's sayin it will do no damage or hurt performance if I remove the smog pump, diverter valve, then plug the converter connection? I would love to create a bit of space under the hood of my GTA.
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Originally posted by vance
thanks for the info .. prob a good idea to just wait untill i replace the stock exhaust and take the pump off then.
thanks for the info .. prob a good idea to just wait untill i replace the stock exhaust and take the pump off then.
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Car: 88 sc. convert
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I've had my pump disconnected for years. I'm still running the pump, but it just blows air out the bottom of the car. It hasn't caused any problems so far.
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Originally posted by crnsuperduty
I've had my pump disconnected for years. I'm still running the pump, but it just blows air out the bottom of the car. It hasn't caused any problems so far.
I've had my pump disconnected for years. I'm still running the pump, but it just blows air out the bottom of the car. It hasn't caused any problems so far.
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you dont even need the pulley, just read this.... https://www.thirdgen.org/newdesign/t...rpentine.shtml
#28
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Originally posted by 88blkiroc
you dont even need the pulley, just read this.... https://www.thirdgen.org/newdesign/t...rpentine.shtml
you dont even need the pulley, just read this.... https://www.thirdgen.org/newdesign/t...rpentine.shtml
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Originally posted by crnsuperduty
That car didn't have power steering. Mine does. That doesn't really help.
That car didn't have power steering. Mine does. That doesn't really help.
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remember the only time you air pump acually puts air to the exhast is in open loop so for most of us it would only be working for maybe 2 min tops after the engine is started
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Originally posted by maverick351ci
remember the only time you air pump acually puts air to the exhast is in open loop so for most of us it would only be working for maybe 2 min tops after the engine is started
remember the only time you air pump acually puts air to the exhast is in open loop so for most of us it would only be working for maybe 2 min tops after the engine is started
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Car: 1988 Trans Am
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Is there a difference between the AIR pump and the smog pump??? or is the the same thing.
I want to get rid of all that crap, but I need to pass the sniffer.
I want to get rid of all that crap, but I need to pass the sniffer.
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Originally posted by Pepsicola
Is there a difference between the AIR pump and the smog pump??? or is the the same thing.
I want to get rid of all that crap, but I need to pass the sniffer.
Is there a difference between the AIR pump and the smog pump??? or is the the same thing.
I want to get rid of all that crap, but I need to pass the sniffer.
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Originally posted by crnsuperduty
That car didn't have power steering. Mine does. That doesn't really help.
That car didn't have power steering. Mine does. That doesn't really help.
i must say though... becareful if you get into this project. the torx shaped bolts on the front of the pump are the bane of my existence.. it took me 2 days to remove the pump becuz these lil bastages stripped out soo badly that i had to drill em and use extractors to get em out. my radiator had to come out and eveything.. it was a mess. although this saves some punds its kinda like 100lbs off = .1secs et and these lil pumps only weight about 2-5 lbs( idunno what the rest weighs cuz i didint have it on mah car when i bought it.
Last edited by Saigon_Bob; 04-25-2004 at 01:25 PM.
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Car: 91 Formula WS6 (Black, T-Tops)
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In an attempt to not rob the cats of their air, what would happen (or would it do any good) if you used the same cats but did not plug their AIR tube?
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Car: '90 RS
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Originally posted by vernw
In an attempt to not rob the cats of their air, what would happen (or would it do any good) if you used the same cats but did not plug their AIR tube?
In an attempt to not rob the cats of their air, what would happen (or would it do any good) if you used the same cats but did not plug their AIR tube?
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Car: 87 IROC 92 Z-28 91 Ragtop
Engine: 5.7
Transmission: 700-r4
Originally posted by 25THRSS
... I even used the stock belt because I have the smog delete pulley and everything looks factory.
... I even used the stock belt because I have the smog delete pulley and everything looks factory.
Please tell me more about the "smog delete pully" and where to get one. Thanks!
Follow up -- did the research and ordered one, here's the info:
---------------------------------------------------------
gmpartsdirect.com for the following parts.
AIR pump delete pulley p/n 10186167 is
listed as a "water pump pulley," cost about
$40.
Another useful item is the A/C delete
pulley, p/n 10055890.
Last edited by Duck; 06-14-2004 at 11:02 AM.
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It might affect efficiency
If you've ever hooked up a scan tool to your ecm, the air pump switches on and off from time to time. The stock ECM is calibrated to compensate for the injected air by adding a fixed number to the current oxygen sensor reading, which may or may not cause a leaning or richening situation that goes undetected.
Also, do not gut your catalytic converter and keep your air pump intact. You will get horrid popping noises from your exhaust. Well, I don't think it's cool... some others here might though ;-)
Also, do not gut your catalytic converter and keep your air pump intact. You will get horrid popping noises from your exhaust. Well, I don't think it's cool... some others here might though ;-)
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Car: 1990 Iroc-z
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Quick question about the smog delete pulley or as its listed at gmpartsdirect.com, the "water pump pulley"....
Does that include a bracket to mount the pulley into the two bolt holes where the smog pump was originally mounted??
Does that include a bracket to mount the pulley into the two bolt holes where the smog pump was originally mounted??
#46
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Originally posted by mikey_b
Quick question about the smog delete pulley or as its listed at gmpartsdirect.com, the "water pump pulley"....
Does that include a bracket to mount the pulley into the two bolt holes where the smog pump was originally mounted??
Quick question about the smog delete pulley or as its listed at gmpartsdirect.com, the "water pump pulley"....
Does that include a bracket to mount the pulley into the two bolt holes where the smog pump was originally mounted??
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Car: 1992 camaro RS
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I didnt finish reading, so yell at me if i ask somthing over again.
If the air tubes connecting to the cat were unplugged because of a high flow cat and no place to plug them, would that cause anything bad? Im still waiting on thoes brackets.
Thanks
If the air tubes connecting to the cat were unplugged because of a high flow cat and no place to plug them, would that cause anything bad? Im still waiting on thoes brackets.
Thanks
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Car: 1991 Red Trans Am
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This may be a dumb question, but if you don't have a cat... you can remove all this junk with no worries right?
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Car: 1991 Red Trans Am
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This may be a dumb question, but if you don't have a cat... you can remove all this junk with no worries right?
edit: i don't know how this happened... but it posted again.. sorry for the double.
edit: i don't know how this happened... but it posted again.. sorry for the double.
Last edited by Red1991TransAm; 02-14-2005 at 02:39 PM.