ok i have two questions in regards to the hedman 1 5/8 and 3" collector headers 1st has anyone ever tried welding the air tubes from stock (lg4) manifolds onto them? OR if u can get air tubes that you could weld on to them?
2nd or i guess 3rd question..anyone know if there is a y pipe for these headers? im lookin around but have not as of yet found any.

 

i guess i did find that i have to have a y pipe made most likely..dont think they make one unless thats changed in the last 5 years. ill probably go to a junkyard and grab some air tubes and see if i can make them fit.

 

Why are you welding air tubes to long tubes? If you need to pass smogs, long tubes will never work. They're very illegal. It's like trying to insure a dirtbike for street use.

 

What good is A.I.R. with no catalytic converter?

 

OK. Thanks for the responses. I've never had to deal with emissions
before so I thought MAYBE I could use my longtubes WITH a cat and pass sniff test. My smog stuff Wouldn't be working and would just be for show since computer is disabled. I guess lt's won't work. Can't afford the Shorties right now. Poor car with stock manifolds.

 

Where would you find room to mount converters after longtubes?

 

Well it would be one converter after a custom y pipe in the stock location
Not true dual. Was just a thought since I have the headers and a good
fabricator. If it wouldn't pass anyway ill give up on the idea

 

How would you get the driver side pipe over to the passenger side to get to a converter in the stock location?

 

i guess im not sure what you mean..what issues with the y pipe do you see? i havent seen yet where the collectors will end up, but these hedmans usually seem to end up in a pretty good location (only what ive heard) tho the drivers side will be extended and possibly lowered a smidge to make it work with my t5 (among other things). then just make the y pipe whatever shape it needs to be to work..even with a sharp angle it would still be loads better than the stock manifolds i would think. the y may have to sit lower than a stock location. but this is all speculation..im just considering my options right now..have about a month to get some kind of exhaust with a cat up and running. if there was a possibility i could get away with the longtubes if i welded air tubes on them and i figured everything else out, like i said i have a good fabricator that wont charge me much..then i would try to do that..

oh and i guess it wouldnt be "exactly" in the stock location..probably a bit lower but in the same general area..again im not doing anything unless im absolutely sure i can make it all work to pass..

 

i will have at least a year (maybe 2) before im due for inspection also so if i find out i gotta make the cat closer to stock location i will have some time and regeneration of funds to change things again..

 

Jack up your car and spend some time underneath it imagining how the pipes are going to run before you decide to run longtubes.

 

Yeah.... there's really no way to get a y pipe done that ends up in the stock location.

 

Yeah. The Fab guy said he would test fit the long tubes 1st. Once he gets those
to fit and then mock up the y pipe. Worst case id have a set of longtubes that
Will work with a t-5. Figure someone'll want those. But were u assuming I wouldn't
Pass sniff test before because u thought I wouldn't have a cat? I'm still wondering
if I could pass a visual and Sniffer if my longtubes were fitted with air
tubes and I had a cat on (plus all the other smog equipment obviously)

 

I can't really see why not..if ur making ur own y pipe..but then again I won't really know
Till I get it on the lift. Ur prob right but just can't c why at the moment

 

My thought was to use the same set up as my hpipe but obviously just one side and maybe diagonal the crossover pipe and then extend the one pipe over the axel...something like that anyway

 

You can put a cat in somewhere, but it'd have to be after the trans in the driveshaft tunnel, and space there is limited. The fartehr a cat is from the engine the less effective it is anyway.

But assuming you can fit one in, you oculd possibly pass the sniffer test, but you'll never pass a visual test because you'd have to run the driver's side exhaust pipe over to the passenger side of the car AND bring it forward in the car, And run the passenger side straight sideways, and then a tight 90 to get it into the factory cat spot. But youd have to basically either run one or more pipes backwards in the car, or run it UNDER the transmission, and it's just not a practical situation no matter how you cut it.

 

Well I appreciate the info. I guess ill stick with the stock set up till I can get the appropriate headers. Just makes me sad to know I'm giving up that much HP....means alot with my limited budget and lamemotor

 

you can mount converters after longtubes!!! I have an 89 with longtubes and duel converters on a custom y pipe..not much ground clearance,but it can be done...

 

i wasnt worried too much about ground clearance, but i have to ask..why dual converters if your doing a y pipe? i vaguely remember reading the later thirdgens came with dual converters..i think i remember reading them to be better..but i guess im confused how that would work..did you have them on the y itself or after the merge? i cant picture it.

my other question is if you have longtubes why converters in the 1st place? do you have air tubes on them? i dont think i could get away with longtubes w/o air tubes in PA even with a converter/s ..or maybe longtubes period with air tubes or not

u dont have any pictures of the set up by chance?

 

actually i cant go with dual cats anyway..have to do just one because thats what the car came with and they didnt have dual cats as an option in 84..i think anyway..PA might not be quite as stringent as CA..idk

 

Look this is where long tubes put the collectors:



Just look at where the factory converter is, and look where the collectors are.

 

ok. thanks for the pic. ill check it out, tho im sure it will be as you say.

 

http://i271.photobucket.com/albums/j...y/DSCF3515.jpg



Here it is done.... sorry for how dirty it is under there but had and oil leak that made a big mess...

 

Wow those pipes look like an elephants trunk! Are they going into a muffler? That's what it looks
like anyway,hard to tell by the pic. Thanks for taking it for me

 

Just be aware that cats that are not in the stock location are not smog legal. May still pass a sniffer test, though.

Looks like a Flowmaster Y Merge to me.

 

oh wait..now that i see it on my computer and not my phone i can see the cats..its too bad my car didnt ever come with dual cats..yeah, unfortunately youre right I.V. It may still be something i do down the road if emissions no longer becomes an issue.

 

If you need to pass pa inspection you need all stock components in factory locations or aftermarket parts with carb #'s. As far as the AIR injection system it only functions during cold start conditions and would play no part in emissions testing as far as numbers, only visual. Sadly in PA there are no inspection stations, you take you car to a mechanic with an inspectors license and they will go over everything and try to make as much $$ off you as possible, that is unless you know someone