Ok here’s the thing I took my main cat off and know I have the air hose that comes out of the motor to the main cat just hanging there. So now my question is should I remove the hose witch is held by two nuts and put a block of plate on the motor and should I still leave the air pump connected to its power source or should I just disconnect the pump and will it matter at all? One thing I was thinking about was if I block it off and leave the air pump connected to its power source wouldn’t it be building pressure somewhere and can it be a bad thing? Or should I just leave the hose there and let the air vent out into the air?

Thanks guys

 

Okey Question is do you have the stock ECU. If you do keep the airpump running. If not and you dont have an elimination kit that what you can do is disconnect the pipe at the manifold level and let it vent there. I was thinking a while ago that you could just get a resistor the same resistance as the air pump but then I got the PFC. Just ideas goodluck!

 

I do have the stock ECU still. One other thing to keep in mind guys I do need to keep the air pump for next years emissions. Thanks Marek

 

Basically you want to remove the main cat while retaining the air pump- for reasons that are beyond me. To do it the right way, you need to buy a pulley kit and remove the air pump altogether. Also, you can't take away bits and pieces here and there because they're hanging.

If you're going to use block-off plates on one aspect of the emissions, do a complete job and clean up the entire manifold.

Now on to passing emissions. Reinstall the air pump, use a belt that fits around the larger Alternator and water pump pulleys and also the air pump. I used a 6 ribbed belt from Autozone (Size: 560K6 <--> 6PK1420) and just trimmed one rib off to fit. Attach a hose to the air pump and trace it down to the main cat hardline.

Disclaimer: The above emissions setup is for temporary use only. As soon as you pass smog, get rid of it for another year.

 

My main question is what to do with the metal hose that should be connected to the main cat, should I leave the metal hose hanging out of the motor or should I remove it and block it off with a block of plate and disconnect the pump form its power source or leave it connected to its power source.

 

bump

 

Put the cat back on the car. Running without a cat on a stock ecu is asking for trouble. The power gain will be minimal and noise increase will be significant. I don't know what other mods you have right now, but if you are looking for power you will be better off finding it elsewhere.

 

midpipe+stock ecu+stock wastegate=boost creep=blown engine, 9 times out of 10 (<----Matty disclaimer ).

 

One thing I did do was put a high flow cat to replace the stock cat.

 

before worrying what to do with ur main car, id worry about either buying a ECu or some kinda of boost controller and keep it at 10 or else ur engine wont last much longer...... My suggestions.

 

Ok one question what would I need to add some more boost to the car safely.

 

Upgrade your ECU to a stand alone or something programmable that can handle 12-14 psi tops on stock turbos and if it doesn't allow you to control the boost get a boost controller to help out... I am at 14psi and I refuse to go higher on my stock turbos. But my MBC is there to LIMIT my boost with an occasional spike in VERY cool weather.

Also, I should note that due to my "high" mileage motor (94k) and all it's issues I don't care that I'm at 14psi on stock turbos cuz I am almost ready to re-do my entire engine bay! And, I have another set of stockers sitting in my garage ready for the day i need them.

 

Thanks and my next question is modification wise what do I need to safely boost higher. What about a bigger intercooler, bigger exhaust piping, and things like that?

 

 

You always need to free up air flow in order to push more air thru the engine so IMO: IC and exhaust are a MUST. But also you'll need an upgraded ECU and possibly even upgrading your fuel system cuz your stock fuel system can only handle so much boost. Honestly I would be worrying about mods and reliablilty before increasing your boost cuz from those mods you MAY get boost creep. Also more boost means more heat so you should be thinking about keeping everything cool in your engine bay as well. IMO you're starting to get too far ahead of yourself.