KagA152

iTrader: (5)

your car looks familiar

anyways, do you have the stock exhaust manifolds? if so, you will need to plug the holes when you remove the lines. otherwise, theres no problems

ShiftyCapone

iTrader: (7)

Some TPI applications have the AIR incorperated into the PROM and it can cause problems if removed. I would look into that on the exhaust board. It is fail safe if you have TBI.

Red1991TransAm

I was more asking for my 82. It has had the cat cut off and replaced with a pipe So when I read this post.. I was just curious.

And yes.. that car does look familiar I pick mine up from the body shop tonight.. will get some pics asap! Going to have my wife make me a sig pic.. can't wait!

Jetmeck

iTrader: (3)

Is this part number for 88-92 L98's ? I have seen part number 10129569 also in a few threads which is supposed to be a delete pulley also ? According to gm parts direct is a belt tensioner ? I am going to run the pump delete pulley, it looks like something is missing without it.

Bottom line, 10186167 work for 88-92 L98's ?

Thanks,

Bill E.

25THRSS

Yes, it will work for all serpentine equipped third gens, which were 88-92. 10186167 is the correct part number, but don't pay any attention to gmpartsdirect's description. IIRC it was listed as a water pump pulley when I bought it, lol. Here is some more info.

https://www.thirdgen.org/techbb2/sho...ht=%2B10186167

Jetmeck

iTrader: (3)

On TPI has anyone heard of any problems disconnecting and removing all the air pump system WITHOUT doing anything to the computer.???????
thx

Bill E.

85z28guy

I just removed mine today, simple, and I needed to replace a lower rad hose so I was there anyways. I didn't need a delete or anything, it was running on its own belt. If you do it though take off your emmison sticker under the hood. Around here if you get caught with the pump off its over a $300 ticket.

bonacci1

This is a 305 TPI for an 87 Z28 can someone tell me what goes here in this area. I will be adding 3 more pics following this one. This item is right above the air pump

bonacci1

what goes from here to here?

bonacci1

Another pic.

Any help will be appreciated

vbMike

iTrader: (2)

bonacci1
In the picture you show there should be a rubber hose that goes from that diverter box and then connects to a check valve that screws onto the metal pipe back by the firewall. This is the air connection to the CAT.

sully91rs

At idle, my car does have some strong odors. Also, when I rev it, it makes a whistling noise, so much that friends thing I have a turbo in it.

I've been told the whistling has something to do with the belt, although it is a whistle, not a squeak.
From what Shifty says, it seems like its something to do with my AIR to Cat.

Sound familiar to anyone?

Azrael91966669

correct belt routeing if you have power steering

https://www.thirdgen.org/forums/prob...h-article.html

killa_b

what could be used to plug the manifold where the pipes thread in for the smog lines?

Jetmeck

iTrader: (3)

Plugs, do a search for the correct thread size and type.

keys2heaven

Bought my '89 TA from a nieghbor of mine. He cut out the cats, but let the AIR system in tact. I get the "popping" sound, especially when I left off the gas and deccelerate.

How hard is it to remove the AIR system and disable those features? Do I need to purchase a chip?

killa_b

that popping isnt because theres no cat atleast my l03 doesnt misfire with no cat

OneMeanLG4

I took old lug nuts and stuffed them in the hoses. Worked well, plus they were chrome, lol. I took out the smog pump, valve and most hoses, and plugged them all up, then the camaro wouldn't start the next morning. Thats when the plugs fouled up so it was a coincidence. Does removing te air sytems put that much of a strain on the cats? X Emissions + Y ammount = still X emissions plus some air. It really doesn't reduce the tail pipe emissions. Dilutes them, but doesn't reduce.

ntomsheck

iTrader: (1)

That's not true, it's a whole heapin helpin of chemistry going on in the cats.

In complete combustion, the engine produces only water and carbon dioxide (which is what we breath out). However, there is rarely "complete" combustion, there are always leftovers. These include nitrogen oxides (dioxide and monoxide), carbon monoxide, and any unburnt fuel.

Unburnt fuel wont turn into carbon dioxide and water (like it's supposed to) if you just stare at it. It needs something to make the oxygen in the air to react with it. There is where the catalytic converter comes in. Platinum catalysts (research catalysts for more info) cause the unburnt fuel and carbon monoxide to react with the remaining oxygen.

Below is a combustion equation of Octane reacting with oxygen.

2C8H18 + 24O2 ----> 16CO2 + 18H2O
and below is a reaction of CO + O2
2CO + O2 ----> 2CO2

So you can see how the catalytic converter works when enough of the reactants are present, but what if the engine is running rich and consumes all of the available oxygen?
This is where the AIR system comes in. It kicks on to give the catalytic converter that extra boost of oxygen when it needs it, such as warm up enrichment when the car runs rich to warm it up.
----------------------------------

Another point is the popping noises from hollowing out your cats. This happens because unburnt fuel (that is normally consumed by the cats) pools up in the cat casing. When you decelerate, the engines puts in a whole lot less fuel and pumps some extra oxygen through, which combined with the hot gasses, causes the fuel to auto-ignite, thus POP. This especially happens with the air system connected to hollowed out cats.

vorgath

So does that mean one would have more problems with passing smog if one ran two cat converters rather than just one ?

Cratemaster

i've got an '84 2.8 and it's got a seperate belt for each accessory, a few of them also power the alternator, but this makes it easy to do an A.I.R. delete. In this small of an engine (and with all it's stock parts) the delete caused no noticable power gain. I bought the maro from a friend who cut the AIR belt off, he "forgot" to get it smogged before he sold it to me, so I had to reconfigure the engine for smog i.e. remove valve cover breathers and replace vacuum lines and such, and replace the smog pump belt. Now I have no incentive to cut the smog pump belt again, I don't want to have a failed cat, ya know what I mean, maybe on the v8's it's worth it, but not a stock 2.8

SLP_GTA

iTrader: (1)

ntomsheck

iTrader: (1)

Nope, they merely function as one, but one per four cylinders. Less emmissions, better flow. The EPA was happy, you're happy, it was a good option lol. The manufacturer option dual cats was two cats in parallel. Some cars come with two in series though. For those cars, the second one just picks up the slack of the first.

jordo2114

alright guys this may sound stupid but what if you took everything off but the pump and routed hose or something to make like a mini forced induction or would it not flow near enough air you could always run a hose from it to the tpi plenum where the coolant lines go in and have it blow air through there to cool it lol sounds stupid i know

BluFBdy

iTrader: (1)

wouldnt cause a difference because forced induction changes the atmospheric pressure...if your smog pump does that you got problems, not only that but those hoses get HOT not cold, so blowing hot air into your plenum would defeat the purpose of the entire idea

jordo2114

dang thought i was on to somethin lol haha

t/agta

I took all the stuff off for my header, but now i cant pass emissions or inspection. Would i be able to put the pump and diverter valve back on, plug the outlet on the diverter that would go to the manifolds, and run only the tube to the cat? would that work? if not i'm pretty much screwed

McguyverMechani

ok quick question in November Massachusetts is passing a no emissions for vehicles under the year 1995...so could i remove all the emissions control stuff easily or would it be difficult?

BluFBdy

iTrader: (1)

IMO dont bother. You dont gain anything from removing it, despite what people say "oh you gain X amount of HP, its all BS. not to mention youll have to re-route your belt or get a "dead pulley" to put in its spot, plus your ECM is designed with those emissions parts in place so if you remove them youll possibly throw codes.

its not worth it, emissions inspection or not. if your worried about making more power look elsewhere, exhaust, cam, etc. Theres a grip of members on here that live in cali with the hardest emissions standards ever and still make very high horsepower motors

McguyverMechani

thanks i wasn't worried about horsepower cause being an automotive student i have good enough know-how on working on cars so i could swap cams, headers, exhaust, etc.

but thanks for the info

92 Camaro

iTrader: (1)

so, after all this is done, what would I do with the canister that sits in the corner?

88FormulaKiller

iTrader: (8)

the horsepower gain i agree is not true, but im from mass as well and come inspection time in my shop i always have to throw a different car on the machine to pass it, so since mass is gettin rid of emissions ill have that one less pita chore and (been said a million times) a much cleaner and attractive engine bay which in my opinion looks alot better, especially for us MA guys looking to enter our f-bodies into shows.

IROCtheThird

iTrader: (15)

I went for emissions about a month 1/2-2 months ago in MA and the guy punched in my car and the data base said I dont need emissions anymore, just safety inspection, so my cat and AIR are gone (cat was gutted anyway). -James

McguyverMechani

well i heard it passed in september then i heard not till november so i dont know which was true

IROCtheThird

iTrader: (15)

Yeah I first read october or november, I went all ready to pass (late august I think) and he told me that anything under 96 now doesnt need emission testing.

BluFBdy

iTrader: (1)

thats just redudant because its federal law, i guess theyre lowering their standards not getting rid of emissions, ive still got til 2014 til mines "historic" vehhicle according to the AZMVD so til then i gotta run emissions

McguyverMechani

that blows

IROCtheThird

iTrader: (15)

My cars going to be a classic this year, next spring hopefully I'll have a DD and both my Camaro's will have classic plates, and no more worry of emissions. I also heard that AZ was really strict on there emissions, Ive never even had someone even open my hood.

BluFBdy

iTrader: (1)

eh it can be, the smog in phoenix is ridiculous though so i see why they make the effort, 96 and newer just get a safety check but older cars are held to a "lower standard" because obviously with age its not gonna pass like it did 20 yrs ago. Every passing year the numbers are given a higher tolerance on 96 and below

They do a visual check, run the sniffer and then do an evap test on your tank/cap nothing too harsh but it can be really annoying if you dont know how to play their game. I know alot of guys register outside of the testing area up in like flagstaff and stuff, i know a few guys that will go to the length of swapping out the motor JUST for emissions lol, stock 305 all the way back to the exhaust tips, i just tune up the car, seafoam it, run a couple tests at my shop and cross my fingers, worst thing ive ever had to do is mess with my fuel mixture so its not too terribly hard

IROCtheThird

iTrader: (15)

Surprisingly I've never seen smog in boston, thats where I grew up. Kind of weird considering the amount of traffic, but we also have a constant sea breeze. But back to topic, I agree no matter where you are its all about playing the inspectors game. I'm just glad I dont have to go through that crap anymore. I dont plan on buying any vehicle newer than 96 unless its a 2010 camaro which will have no problems passing

87transGTA

hey i have high flow cats and no air pump but i still have all the hoses where they go could i just swap headders and remove all that air crap cause i pass emissions here without the pump on and just snip off the electrical connectors or will that set off a "check Engine" light?

tony_cogliandro

iTrader: (3)

here i california you dont take anything off. any removal of oem, or carb equip means very bad things. we have to keep it all.
it does not draw much hp, just the pull on the pump from the belt.
it shoots air into the exhaust from the valves, then later down the line that exhaust goes into the cat, which also has a air insert. i think its clean air into the cat, but maybe not.
there are hoses that move vent air everywhere, including into the intake manifold through the throttle body.
wait - maybe im wrong again? probably and im looking at the manual as i type.
i just left it on. if you dont want it to work get a 2nd chip that disconnects everything and still keeps the right fuel mistures and it will run like a race horse. its easire to lie to a computer than take it all off and get caught at the bi annual smog inspection.

87transGTA

here on the emissions they put a rod in the tailpipe and thats it so that why i want to take it off since i have passed emissions with the smog pump belt off so i want to remove all that crap, now on the chip where could i go about gettin this chip

TA-Rocks

That is one beautiful paint job and Nice car!

CamaroIROC88350

iTrader: (1)

Okay, I have a couple of questions (or more maybe).

1.) Does my 1988 IROC 350 have A.I.R. tubes connected for the cat converter?

2.) How long will it take & how hard will it be to remove the A.I.R. stuff up top and to remove the smog pump(?) where the serpentine belt runs?

3.) I want to remove all of this crap out of my IROC to help clear up room in my engine bay. I don't need to worry about emissions and my car isn't a daily driver.

If I think of anything else I'll ask. Thanks.

88FormulaKiller

iTrader: (8)

1) yes (or atleast it Should)
2) how good are you with a wrench? took me 20 minutes to remove exhaust manifolds to cat, smog pump and air diverter pump and all tubes.
3) Excellent

fr3ed0m

historic vehicle plates dont exempt you from testing in arizona, any car 1966 and older is exempt and some 2006 and newer models are exempt from testing being there not 5 years old yet. Anything 67 and newer has to be tested 69 and older is just the sniffer at idle no gas cap test just has to have a cap, 70 to 80 is idle test and gas cap pressure test, and 81 to 95 is loaded and idle test with gas cap pressure test. 96 and newer under 8600 gvwr is an obd2 scan and gas cap pressure test, and 8601gvwr gets rolled and gas cap check

not trying to be a kill joy blufbdy just dont want you to get your hopes up like i did with my 72 truck idk how they do it in phoenix though but in tucson i test cars with historic plates everyday.

btw sorry for bringing back an old thread

BluFBdy

iTrader: (1)

IF you live in an emissions nzone that is, I. Moved to washington and I fall outisde of testing zones , so I yanked all my crap out lol ADEQ can suck it lol

Dante93GTZ

iTrader: (5)

Maybe that's what has happened to mine - I removed my air system and then cut the tube off about 4-5" away from the cat and crushed the end - I get a whistling sound at high RPM.....

fr3ed0m

yeah i when i buy another camaro i get to keep all that stuff and sense i work for emissions they check my car hardcore just cause they know what im supposed to have i cant wait for the day i can quit saying "it will be 12.25 and you can make the check out to adeq" "avei is what your name badge says though" "yes but they check is for adeq" "id like to speak to the manager i will ask him who to write it out to i dont need you stealing my money" i hate that job so much lol