ACIS "port and polish"

[bassthrive]

Originally posted by 2wickedtoyz
this mod does not require you to spend a single red cent. i was looking at an mr2 tvis system and noticed that a 1mz and 3vz have a similar set up. so i grabbed my spare intake and looked at it. then i noticed a vacuum actuator on a removable plate. so i removed it and saw an air control valve. i didn't know what this did for the car so i read this:

Acoustic Control Induction System (ACIS)(v6 models only)
1mz-fe 3vz-fe 2vz-fe

1.The ACIS allows the intake manifold to divert the path of intake air into the combustion chamber. Two air intake paths are provided in the intake manifold to allow the option of the intake volume most favorable for the particular engine speed. Optimum performance is achieved by switching the intake air control valve from either the closed postion(for high tourque at low rpm) or the open position(for maximum horsepower at high rpms).

this information was taken from a haynes manual on page 6-15

well to state where i'm going with this is when they made this thing it wasn't very smooth. so i cleaned it up and rounded the edges so there is less resistance. the effect was amazing at about 3500rpm's i feel the car pull alot harder than before and just to make sure i wasn't imagining it i put my old one back and i didn't feel the same kick.

here are the only tools you'll need:

12mm deep socket
wratchet
wire brush
pliers
dremmel
grinding stones
throttle body cleaner(most be fi safe)

you can do this mod in about 1hr so let's say during your lunch break;)

1. (this is where you may need the pliers)remove the diagnostic plug and both vacuum tubes.
2. using the wratchet and socket unbolt the 4 nuts that hold the piece in





*these next steps are critical in this working corectly and saving you money and make sure not to remove or harm the gaskets*

3. clean the piece off with the wire brush to remove all the build up.



4. use the dremmel and grinding stones to smoothen the entire thing making it as flush as possible to the valve.





5. clean it off with throttle body cleaner or you can just brush the stuff off.
6. put it back on using the same gaskets.
7. enjoy.



this is the only pic i could find right away if you can get a better one please post it and i would like to have pics to help with this mod:



on the passanger side of the intake is what i removed to do thisthere are 4 12mm nuts to remove it's really easy.

better pics from the book:

Stolen from Toyota Nation...

What do you guys think?

- Paul

[Fletch]

That's interesting, a lot of us have pulleys in the way though...joke

Theoretically it holds water, but I don't know about the effects being amazing. I've heard exaggerated results from coolant throttle bypass and wrapping headers in heat tape also.

[SolaraT]

not free if you don't have all them tools

[Parke10]

i hope i nvr come 2 not having the tool my dad has enough in snap on that he could sell it and buy me a couple of new solaras lol

[99V6solaraSE]

how reliable is this ??? is the results really dramatic... Im a bit skeptical. I dont wanna do this and have anything go wrong wid my car....

[bassthrive]

I did it a couple days ago. For the hour of effort I put into it I think it was well worth it. I do feel a subtle increase in top end hp (with no low end torque loss). Also, while I was in there, I was able to clean 60,000 miles worth of buildup off the acis and 90% of the inner intake manifold.

- Paul