Could someone please tell me all the emissions control devices on a 1990 Turbo 2. I plan on deleting all of the smog equipment. Will doing this result in a badly running car? I already got a block-off plate for one of them but I don't know the names of any of the smog stuff so I don't know what plate I got. All I know is it fits where I took off that "thing"...

Thanks for the help!

 

TII hm.... no egr, ah u don't have cats right? or is that just catback? hmm... keep your airpump, unless u don't want your vdi working, which is bad, u would have to lock it in the open postion and u would lose some low end power. Does your car have an air control and check valve? im not familiar w/ tII or S5. If so u could block that off, but be warned the ac&cv does control anit afterburn, it injects air when decelerating to help eliminate backfires. U could get rid of the spider vac under your intake, but u would have to keep the twin scroll solenoid. Your could jsut take off the other 3(?) solenoids and capp off the vac hard lines. U could get rid of the BAC valve, just make urself a custom block off plate. My car runs fine without any emissions crap on it, and i even fixed my high idle in the process! But there are more backfires when i let off the throttle at high Rpms, but there are small and insignifcant, and rotaries backfire anyway. My gas mileage has gone up from getting rid of my cats too. And there is more power, not just from cats, but no more parasitic drag of my airpump and my egr doesn;t recirculate exhaust gas.

 

i got an ACV blockoff plate from http://www.k2rd.com . i have no cats so it cleans up the engine bay a little cleaner. i also removed my air pump. makes the engine and turbo easier to work on

 

umm this is a TII it doesn't have VDI! it has a turbo instead. the air pump does nothing on a TII except emissions also S5 TII don't have twin scroll......

 

Correct me if I'm wrong but the BAC valve doesn't belong to the emission control. It's for idle speed control and idle setting on turbo.

 

yea but its just something more u can get rid of.

 

yea but its just something more u can get rid of.[/quote]

I'm sure you have good reasons to get rid of a BAC valve but I'd like to understand those reasons too.

These are my reasons to keep it:

- It weighs almost nothing

- Keeps constant idle speed

- It's needed for idle speed setup on turbo (adjustment screw is there)

- No loss of power there.

The only advantage I see to remove it is that it would have less pipes around the engine, more clean. Oh yea, less parts to doubt when trying to solve a problem! This could be a good one.

 

yea but its just something more u can get rid of.[/quote]

I'm sure you have good reasons to get rid of a BAC valve but I'd like to understand those reasons too.

These are my reasons to keep it:

- It weighs almost nothing

- Keeps constant idle speed

- It's needed for idle speed setup on turbo (adjustment screw is there)

- No loss of power there.

The only advantage I see to remove it is that it would have less pipes around the engine, more clean. Oh yea, less parts to doubt when trying to solve a problem! This could be a good one.[/quote]

There's also an idle adjustment screw on the throttle body.

 

yea but its just something more u can get rid of.[/quote]

I'm sure you have good reasons to get rid of a BAC valve but I'd like to understand those reasons too.

These are my reasons to keep it:

- It weighs almost nothing

- Keeps constant idle speed

- It's needed for idle speed setup on turbo (adjustment screw is there)

- No loss of power there.

The only advantage I see to remove it is that it would have less pipes around the engine, more clean. Oh yea, less parts to doubt when trying to solve a problem! This could be a good one.[/quote]

There's also an idle adjustment screw on the throttle body.[/quote]

i did it becuz i wanted the least amount of things under my hood, and Ace pointed out the other reason.

 

yea but its just something more u can get rid of.[/quote]

I'm sure you have good reasons to get rid of a BAC valve but I'd like to understand those reasons too.

These are my reasons to keep it:

- It weighs almost nothing

- Keeps constant idle speed

- It's needed for idle speed setup on turbo (adjustment screw is there)

- No loss of power there.

The only advantage I see to remove it is that it would have less pipes around the engine, more clean. Oh yea, less parts to doubt when trying to solve a problem! This could be a good one.[/quote]

There's also an idle adjustment screw on the throttle body.[/quote]

i did it becuz i wanted the least amount of things under my hood, and Ace pointed out the other reason.[/quote]

That's exactly the advantage I mentionned. But you mean on turbo you can adjust idle speed either with the BAC screw or throttle body screw, right?