Needa13b

After getting a good look at everything, I was wondering why my Secondary ports are FILTHY, and my Primary's are almost shiny?

Turbo II-FB

get some carb cleaner spray those suckers down. Mine was alot worse yours dont even compare

Needa13b

Do you have any Idea why they are so bad? What happened with yours? My ports are filthy all the way up to my throttle body, all the way down to LIM. The one with the more clogged diffuser is much worse than the other, I can imagine fuel is just getting splashed on the sidewalls of the port.

Stanello

iTrader: (1)

While you have the manifold off, either swap out your pulsation dampener for a new one or replace it with a banjo bolt.

Needa13b

Yea, I'm looking into doing that as well, i'm planning on all new vacuum and gas hoses, and major cleaning, and cleaning up the engine ground.

Needa13b

How do you pop those FI Diffusers out? Is it as easy as "popping" them out?

philiptompkins

iTrader: (4)

spray them with carb cleaner and giggle them out

alexdimen

iTrader: (13)

i'd say it has something to do with the oil inectors and also how they flow full time rather than at reduced capacity at less than 4k rpms like the secondary ports.

i wouldn't try to dislodge any of that crap until i got the lower manifold off... it's not the greatest idea to put all that crap into the engine when contamination is the reason to remove that gunk in the first place

Carzy Driver

the secondaries get covered in a oily film beacuse the oil vapors that run through the PVC valve dump into the portion of the dymanic chamber that supplies air to the secondaries, thats why its all dirty, your's really is not bad.

RotaryResurrection

iTrader: (8)

WHat the hell are you guys talking about?

Carbon forms there because the intake ports inside the engine are always open, yet the throttle plates and passages for the secondaries are usually closed. SO those runners become long "dead" spots which are actually extensions of the combustion chamber, and carbon builds up there because there is no air flow most of the time. IT's totally normal for any rotary. Play with your TB, you'll notice that the secondary runners only open with 35% or so throttle or more. At cruise and idle they are completely closed off.

Needa13b

What are the oil lines that are running into the primary ports on the LIM for? I see where the 2 lines go to the oil injectors on top of the rotor housing, but what are those other 2 for?

Rex4Life

Kevin,

Do you know why the rear secondary runner is allways oily while the front secondary runner is clean? I've seen this on several cars and have yet to hear a good explaination.

TIA,

Scott

RotaryResurrection

iTrader: (8)

Never seen or heard tell of it. Secondaries are always dark and carboned while primaries are always relatively clean. Because air is always flowing through the primaries, but not the secondaries.

jediknight7

the oil injectors in the housings mostly lube the apex seals, whereas the injectors in the minifold allow oil to get to the entire chamber to lube the side and corner seals.

RotaryResurrection

iTrader: (8)

Not really, since it's only one side of the rotor that would get the lube. It's just additional lube on top of the injection on the rotorhousings. They used the primaries because, again, they have airflow all the time, which would tend to keep the oil going into the engine more consistently.