hey..i've got an 86 trans am tpi 305 with v-belt system..
and i'm about to rebuild it...but ..upon removal i found that the pipe to the converter was broken.
here's my question..where could i probably buy that pipe at
and really...how many people suggest putting the smog system back in?
i'm going just over stock ..probably about maybe 255 horse or around there..not really looking to race it too much.
let me here your thoughts
thanks

 

Have you considered "repositioning" the smog pump system?

 

repositioning?.what do you mean?

 

Repositioning it outside the vehicle. More precisely, repositioning it into your garbage can. You don't live in Cali, and unless MI has a visual inspection, you don't need the HP drain.

 

Take it all out. It takes up so much room and is not really needed. Mine is out almost completely and I can actually see most of my engie instead of tubes.

 

repositioning?.what do you mean?

 

i didn't mean to type that "repositioning" question again


and thats what i thought you meant

but here is my next concern
being that when you remove the AIR pump. you of course also remove the solenoid. so ..when the ecm commands the solenoid and doesn't see a change in the O2 sensor...does the check engine light come on?
or will it come on at all..for any reason after smog pump is removed and junked where it belongs

 

No it shouldn't cause any error codes assuming you do not create an exhaust leak before the O2 sensor.
Just FYI, the catalytic converter will not survive long without the air pump operating. I know that's probably not a big concern but if you trash the pump then you should go ahead and take the CAT out as well.
Without the heat provided by the air pump the CAT will clog much quicker.

 

hm...what kind of life reduction are we talking about on the cat?

and lets say that i just eliminated that cat altogether
doesn't the EGR valve work off of back pressure from the exhaust.that i would lose by taking the cat off and adding headers and 3 inch pipe all the way back?

i mean..wouldn't that created an EGR problem?

 

No it doesn't.

 

hm..you sure? cause i understand it...the egr valve opens due to manifold vacuum on the diaphram...but also by back pressure pushing up on the diaphram and sorta forcing its way into the intake

 

the back pressure of an exhaust is not entirely determined by the cat. It increases it but is not the only cause of back pressure. The air pump removal does not mean your cat is automaticaly ruined. Many cars with carbs have cats without air pumps. I don't think they have to replace cats all of the time. Think it over.

 

well i know that the cat isn't all of the backpressure...
but with 3 inch pipe and headers and a high flow muffler
and eliminating the cat...all that combined....isn't that
too much of a loss of backpressure for the egr to function
like it should?

 

Yes I'm sure. If you weren't willing to accept this answer then why ask?

 

nah..its like that i'm not willing to accept answer...its just i'm one of those dumba s ses...that likes to be technical about everything
kinda sucks...
so i was just seeing if you had like a theory behind why that wouldn't affect it...not as if i don't believe you ..i'm just weird like that