cntt Posted October 18, 2006 Share Posted October 18, 2006 whats that kicks in at 5k rpm? after installing the hard pipe kit, reset ECU again, when I hit 5k rpm, I can really hear the filter, even before I got the induction kit fitted, I can hear that, but it just got louder Link to comment Share on other sites More sharing options...
bondango Posted October 18, 2006 Share Posted October 18, 2006 ACIS kicks in around 4.5K Link to comment Share on other sites More sharing options...
cntt Posted October 18, 2006 Author Share Posted October 18, 2006 might have been 4.5k acis? Link to comment Share on other sites More sharing options...
bondango Posted October 18, 2006 Share Posted October 18, 2006 Acoustic Control Induction System. "Two and three stage Acoustic Control Induction Systems can be found on various Toyota models. Both systems operate on the same principles, however the 3-stage system is able to tune the intake manifold to 3 lengths instead of 2. 3-stage Acoustic Control Induction System (ACIS) uses two valves inside the air intake manifold to create the effect of 3 intake runner lengths. The ECM is able to select from these 3 lengths to effectively tune the intake manifold to engine operating conditions so that a pulse of high intake pressure is immediately available when the intake valve opens. The engine uses these high-pressure pulses to pull an unusually large volume of air/fuel mixture into the combustion chamber, effectively supercharging the engine and increasing torque. Benefit: Increases power output at all speeds" Some toyota's like the gt4 use TVIS which is also similar Link to comment Share on other sites More sharing options...
cntt Posted October 18, 2006 Author Share Posted October 18, 2006 I see thats same intake system used on the Honda Integra SiR, they have 2 stage intake control from the ECU. thanks for the info Link to comment Share on other sites More sharing options...
Pete Posted October 18, 2006 Share Posted October 18, 2006 whats that kicks in at 5k rpm? Boredom? Link to comment Share on other sites More sharing options...
bromy Posted October 19, 2006 Share Posted October 19, 2006 Located here Link to comment Share on other sites More sharing options...
MrRalphMan Posted October 19, 2006 Share Posted October 19, 2006 Boredom? Bitch!!!!.. I love it Link to comment Share on other sites More sharing options...
colsoop Posted October 19, 2006 Share Posted October 19, 2006 Is that what the butterfly in the na intake is for then ? Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 19, 2006 Share Posted October 19, 2006 Is that what the butterfly in the na intake is for then ? yep. Link to comment Share on other sites More sharing options...
Rob Posted October 19, 2006 Share Posted October 19, 2006 Which models/years is that on then? Is it all in the actual body, or anything in the outer pipes? Link to comment Share on other sites More sharing options...
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