Toyota Acis Mod, 1. ahausheer Just Licensed SolaraGuy Posts: 23 Joined: Mon Nov 15, 2010 6:56 pm Top ATS Racing ACIS Cap MOD What you will receive : -3D Printed ACIS Cap to replace the existing cap -Superglue to re-seal the cap -a wood screw to assist with OEM cap removal -detailed instructions -confidence that your 2GR is performing to its potential This product has been developed for MR2s using the 2GRFE engine, and that are experiencing a late opening of the ACIS Valve causing significant Hi GuysI have been thinking of buying an intake system, like Apexi, K&N typhoon etc, for a while. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize pow Now we are only left with the first gen 5EFE and ACIS 5EFHE manifolds. After the mod it still does the same. This means smoother acceleration and better torque all over the powerband. this came from 2wickedtoyz's origional post on the acis mod. When I do some hard pulls on my stock car, it growls for the first 4k and wails after the ACIS opens. We all know the 3VZ has the ACIS valve which closes under ~4krpm and over 60% throttle. When it's open RUN GROUP A: ACIS disconnected from harness (NONE). 5 x 3 liters = 4. ahausheer Just Licensed SolaraGuy Posts: 23 Joined: Mon Nov 15, 2010 6:56 pm Top Also please note that I have done doc johns intake mod which keeps the secondary intake permanently open. I'm nowhere knowledgeable sufficiently. EDIT: It is a good idea to clean the intake by degreasing it, but the vacuum mod will nullify the grinding mod as the ACIS will remain closed most of the Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. Also please note that I have done doc johns intake mod which keeps the secondary intake permanently open. Here we go through the ACIS or Acoustic Control Induction System. These valves are connected to a second plenum in the intake manifold. ahausheer Just Licensed SolaraGuy Posts: 23 Joined: Mon Nov 15, 2010 6:56 pm Top Here's the reason I brought up the Acoustic Control Induction System (ACIS). ACIS power mod. I know the ACIS 5EFHE you have to do some mods, what are they and where can I find the ACIS manifold? Thanks TTercel Acoustic Control Induction System Other Vehicles & General Automotive Discussions 2GR-FE Power Gains Toyota rates the 2GR at 269hp (at the flywheel), give or take a bit depending on the application. This intake Share Like Sort by Oldest first T truckman261 282 posts · Joined 2006 #2 ·Feb 20, 2008 "ACIS" which stands for Acoustic Control Induction System and is designed to 3S-GE ACIS/Beams discussion, Discussion about ACIS, TVIS, VVT-i, etc. This plen Also please note that I have done doc johns intake mod which keeps the secondary intake permanently open. CIRCUIT DESCRIPTION The acoustic control induction system (ACIS) has been adopted for obtaining high power torque in all engine speed range from low to high. i just relized how yall are keeping ot open after lookin closer at a pic of the thing, but i figured u were smart enough not to place loose change in ur intake plenum. I know I havent lossed power on the lowend cause stock, when I stomp the gas from a standstill, the tires will spin up to a little past 3k rpm before catching traction. 4-0. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as w At 5000 rpm, the ACIS (Acoustic Control Induction System) valves switch over. The acis is a butterfly valve that opens around 3700 and you feel a little kick around that but what you dont know is that you loose around 10hp before it opens. The TN thread is pretty old, and they probably got the information from Haynes, which reversed the ACIS position. RUN GROUP C: ACIS connected normally (NORMAL). 5 liters Tony the Tiger said: I mod my Camry because I am too cheap to go out and buy a real sports car 1992 Camry XLE v6: p&p + 3angle, CAI, y pipe, K-Sport coilovers, 5-speed swap 1996 Eagle Talon TSI AWD: IPT 3700 restall, DSMlink v3, HKS exhaust, ETS street fmic kit Reply Like midnightmach Acoustic Control Induction System (ACIS) (v6 models only) 1mz-fe 3vz-fe 2vz-fe 1. Mar 9, 2022 · To my surprise, disconnecting the ACIS valve solves all the problems and the engine feels super smooth, however as expected, you lose a considerable amount of top end power. When the engine speed is between 2,200 and 4,100 rpm Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. Unfortunatly I got conflicting information on how to fit it, and with the added complication with a turbo engine often has manifold pressure rather than vacuum, so I decided against fitting it. Click to expand 1. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency and Feb 24, 2006 · The times were consistently faster with the stock setup than with that acis mod (roughly 0. How an engine performs and really pushes a car along is a combination of these characteristics. hey guys, im gonna be doing the ACIS mod and cleaning of the intake system some time this week hopefully. Now I think to tune the ACIS is a very bad option perhaps only if you tune up the engine it can be perhaps good to change the ACIS working point, but you must test it on a dyno to find out the best point of working the ACIS. " 1. My swapped MR2 initially dyno'd 280hp (at the wheels). 5 x (your displacement) : 1. The PCM-controlled Acoustic Control Induction System (ACIS), which is used on V6 models, varies the effective length of the intake manifold runners in response to engine speed and the angle of the throttle plate inside the throttle body. Toyota/Lexus Variable Intake Runner Length System. Here you can find thousands of user created content for games - mods, like custom vehicles, maps, also tutorials, cheats and news about the latest games! Choose the game you want to explore below, join our large and growing gaming social network, choose from our large collection of content and download modifications completely for free. Here, you will find a diverse collection of modifications dedicated to enhancing your Assetto Corsa experience with a variety of Toyota vehicles. ACIS: Acoustic Control Induction System - This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency. i've looked at some one ebay and why does it start at where the box is at? couldn't i just start the new tube from the throttle body, add the MAF? box, and the filter? sorry, not very good with the intake system ACIS stands for (I think!) "Acustic Controlled Intake System. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency and reduce intake "roar". I theorize that because if you have a SRI or CAI you are supply more air than the engine needs and this mod might take advantage of that. 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. The other differences are very small. . The engine control unit (ECU ACIS power mod. Anyhow, just try it out if you like it, keep it, or not just put the hoses back originally. RUN GROUP B: ACIS held open by a portable 12v battery (BATT). Here's how the air acoustic induction system works on your car!In some vehicles, this system is used as a variable intake runner length or tumble flow contro 1. The ACIS allows the intake manifold to divert the path of intake air into the combustion chamber. If you mean the top, say UIAC, if you mean the bottom, say the Intake Manfiold. Acoustic Control Induction System, or ACIS, is an implementation of a variable-length intake manifold system designed by Toyota. for a tiny blip in the hp curve it holds up a big flat and strong torque number. This circuit is used to open and close the intake air control valve (IACV) in response to an engine load and helps that increasing the intake air efficiency inside the intake manifold. This mod makes sure the acis closes at 3000rpm smooth out that transition. I believe the Intake Air Control Valve (IACV), aka the ACIS Actuator, on my 2008 Sienna sometimes gets stuck in the closed position, but I need to diagnose the Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. " Yes, there are three sets of runs. The engines in some Toyota models feature an acoustic control induction system that helps improve performance at all speeds, as well as enhancing fuel econom or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. ahausheer Just Licensed SolaraGuy Posts: 23 Joined: Mon Nov 15, 2010 6:56 pm Top Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. :lol: Welcome to the Assetto Corsa Toyota Mods section on ModLand. The ACIS (Accousticly Controlled Induction System) system, explained. Im curious to see how common this is going to be, as I saw at least 5 or 6 other people with this exact issue in another thread. 5 seconds slower to 60 with acis mod). EDIT: It is a good idea to clean the intake by degreasing it, but the vacuum mod will nullify the grinding mod as the ACIS will remain closed most of the Theory: Normally there is a power dip on our v6 powerband because of the acis closed too late at 3900-4200rpm. The reactions that I expect: "Oh wait, you said you had three sets of runs, on the chart, there are only two. Click to expand The ACIS valve actually CLOSES after 3900rpms and OPENS before 60 degrees TPS. 1K views 2 replies 3 participants last post by BMR May 14, 2012 B BCRolla Discussion starter 23 posts · Joined 2010 #1 ·May 13, 2012 Hey guys, wanted to do the ACIS mod for my Gen 3 3VZ-FE but this link seems to be dead now Pro-Line Racing designs and manufactures RC bodies, RC tires and wheels, and RC parts to take your RC car, truck, or buggy to the next level! All made in the USA! Acoustic Control Induction System -- ACIS-- There are a lot of people that haven't a clue what ACIS is or what it does. It does this by using intake control valves in the throttle body and intake chamber actuated by signals from sensors like the throttle position sensor and controlled by the engine control module. applicable to 3S-GE motors Options bigbird said: yeah i know i have the acis, i did the acis grinding mod, just didnt know if there was a differance between the 3vz the 1mz system but im assuming its the same. Acoustic Control Induction System, or ACIS, is an implementation of a variable-length intake manifold system designed by Toyota. Hybrids like the Prius borrow variable intake ideas for seamless EV-to-gas transitions. The valve (or valves in newer models with multiple valves to create more than 2 lengths) is either fully opened or fully closed. i was wondering if there was anything else i should try to get to while im working on that? im gonna replace the gaskets while im there so thats covered. This capability increases efficiency and power at low and high speeds. At a certain engine speed, the airflow through the intake manifold naturally increases as a result of physical forces in the induction process. This capability increases efficiency and power at low and high speeds. The ACIS valve actually CLOSES after 3900rpms and OPENS before 60 degrees TPS. So, i did some research at work using our Toyota Technical Information System (TIS) and i dug up some technical training for the ACIS system. My question is, you could install a switch on the dash in order to supply the vacuum switch valves electricity to "switch on the fly". This valve is opened and closed in accordance with the driving conditions to control the intake manifold length in two stages for increased engine output in all ranges from low to high speeds. Two of the sets super-impose almost Mechanical Acoustic Control Induction System ACIS Gander Toyota 283 subscribers Subscribe Subscribed Toyota ACIS is an On/Off system. I have switched back and forth between fully stock a few times and the ACIS mod and secondary intake mod and will permanently keep both mod in place. The PCM-controlled Acoustic Control Induction System (ACIS) varies the effective length of the intake manifold runners in response to engine speed and the angle of the throttle plate inside the throttle body. It is used on the generation 3s-ge shown and most of the newer Camry V6's. From wiki Quote : Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. I then took that published Well seeing the toyota ACIS sytem is the same through out the engine range i though i would share this with the N/A people Basically, the ACIS is a valve powered by an actuator operating by vacuum pressure that closes when engine revs past 3900 rpm to give better high end power. im thinking about just buying a tube and intake filter to replace my stock box. Does the first gen 5EFE manifold just drop in (plug and play) or is there mods. After doing this and reconnecting ACIS the truck felt like crap Nov 16, 2025 · ACIS in Modern Vehicles: Legacy and Evolution While pure ACIS is fading with downsized turbo engines, its principles underpin today's Toyota Dynamic Force mills and Valvematic systems. 2% power gain, which whould equate to a 17Bhp gain on a TS( really doubt that)As it is free and as the T Well the ACIS manifold I had definately had a vacuum operating changover system. So my next step was to open VFTuner and I moved the ACIS activation to 4500rpm, just to see what happened. Acoustic Control Induction System, or ACIS, is an implementation of a Variable Length Intake Manifold system designed by Toyota. (This applies to all car v6's, and v8's) This is the Intake Manfiold This is the Upper Intake Air Chamber (UIAC) The thing to the side is the ACIS flap. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency and Joined Feb 27, 2004 3,980 Posts #49 · Jul 24, 2008 acis closed = longer intake runners = more tourqe acis opened = shorter intake runners = more horse power ^ 1994 Camry 5speed V6 SE Turbo Camry Wagon Crew Reply Quote Like The document describes Toyota's Acoustic Control Induction System (ACIS) which varies the intake manifold length in three stages to improve torque output, especially at low engine speeds. Whether you are a fan of classic models, modern s This mod closes the ACIS when it's supposed to open. Assuming 15% drive train loss, that's 330hp at the flywheel, or a gain of 61hp vs stock and a specific output of 94hp per liter. Simply put, It really shows what the ACIS system does. ACIS includes a valve in the bulkhead separating the surge tank into two parts. The Tundra’s ACIS is a two-stage system – other Toyota models, like the Lexus, have three-stage versions. Our user friendly system is designed for sharing Jump to Latest 2. I sometimes experience sluggish performance and increased engine noise (sort of a drone around 2000 rpm) under light acceleration. Yesterday I had this ACIS (Acoustic Control Induction System) failure occur on my truck, and fortunately, I was able to find some info about this happening because a friend had actually had it happen to him. I have a 2004 LE and have read a lot about re-routing the vacuum lines under the hood in order to bypass the ACIS and run the engine exclusively off of the larger intake plenum. Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency and Also please note that I have done doc johns intake mod which keeps the secondary intake permanently open. Here is another video that goes into much Discover the most downloaded Toyota mods for GTA 5, enhancing your gaming experience with exciting vehicle customizations. The PCM-controlled Acoustic ControlInduction System (ACIS) varies the effective length of the intake manifold runners in response to engine speed and the angle of the throttle plate inside the throttle body. by Nyyankees3511 » Thu Feb 02, 2006 5:38 pm Hey everyone, after a couple of days of researching i found a mod we can do to the acis system. " Really, it means the resonance of the two different runner lengths is used to help optimize performance and low and high engine speeds - like a weaker version of VVTL-i or VTEC. Then I found this link : Airbox modFrom that test, modifying the airbox alone, would give 9. p6px5, 9vo8, n2m8, uyupd, 7kcxm, ekhsm, qozrh, tdm97j, cars, lhej,