the pic below is the center housing from a gsl-se
does anyone know what is that retangular port for? intake or exhaust?
will i creat any problem if i block it?

the reason i am thinking blocking it because i swap the s4 intake manifold in and now that port is only partically covered. if i have that covered will i creat any problem later if i want to smog the car (of course with the stock gsl-se emmision equipment)

 

If im not mistaken, that lower port is a "crankcase" vent.

 

actually it's an emissions thing. exhaust comes up thru that from the exhaust ports. the reason for the aluminum blocking nozzles that RB sells. there's 4 of them and i have them in mine. u'll have to drop the oil pan to put them in. probably the easiest way would be to pull the engine out.

 

that is an early EGR port... the 12-A's had the same thing...

you will not have a problem in blocking it off...


Dan

 

i just checked out the RB website
i believe then only have that for 71-75, may be i am wrong

 

I have heard of people filling that opening with JB Weld and such. What I did with using a SA intake on a Fb block is add material to the bottom of the intake. This way you don't do anything permanent to the center iron. This is what you are running into.



This is what I did to the intake.

 

wow that's exactly the problem i have
do you mind tell me more about how you got that done

 

I don't know the extent of your welding, but this intake just had aluminum filler rod added too the bottom to build it up. After that, the excess material was then ground down to the desired shape. I went a step further, and removed the EGR castings off the intake, then plugged the unnecassary ports. I have also heard of people making a sheet metal adapter to go between the intake and block. But then you have to put freeze plugs in the coolant ports on the housings too keep from coolant leaking.

 

Guess I am mistaken

 

That port feeds air from the ACV,to the exhaust port when the ACV is told by the ECU to do so.Thats why the intake manifold covers the port.The little one-way round disc under the ACV keeps exhaust flow from backing up into the ACV,when no air is flowing.Thats why exhaust carbon builds up in the center iron and intake,up to that one-way valve.
It may also double as an EGR feed port,but only 1980 CA models have an EGR,and that makes up a very small portion of 1st gens.
The ACV can also send air to the catylist or stop airflow altogether,depending on engine temp,revs,throttle position,ect.You likely will not pass the tougher CA smog test with that port blocked off......