Make the ACIS open earlier- mod- smoother power delievery
This post relates to gen 2 and 2.5 V6's.
If you have ever accelerated hard you should notice an unevenness in power delivery with a distinct power bump around 4.2K rpm, this is due to the ACIS system activating (google it). On my car at least, the when the ACIS engages it is very noticeable and annoying as it makes aggressive acceleration very uneven, and it feels like it should activate earlier to avoid this jump in power delivery.
I wanted to activate the ACIS earlier to avoid this jolt in power delivery. What I did was connect the vacuum actuator valve (the thing that activates the ACIS) to the vacuum switching valve (the thing that controls the opening of the secondary intake). The secondary intake supposedly is activated at 3.2 K rpm, nearly 1K rpm earlier than the ACIS actuator ( at 4.2K rpm). All I had to buy was a few feet of vacuum tubing, other than that its just a matter of moving a few other vacuum tubes around. My initial impression is that power delivery is smoother but am not sure if the car pulls harder overall. I cant post pics but If you need more details to try this yourself email me at ahausheer@yahoo.com and I can give clear and specific details. Anyone ever try other ACIS mods, like keeping it permanently engaged? Cant find a dam thing online but ill keep experimenting.
Very happy with my Solara but I seriously want more power and speed, is there nothing we can do?
If you have ever accelerated hard you should notice an unevenness in power delivery with a distinct power bump around 4.2K rpm, this is due to the ACIS system activating (google it). On my car at least, the when the ACIS engages it is very noticeable and annoying as it makes aggressive acceleration very uneven, and it feels like it should activate earlier to avoid this jump in power delivery.
I wanted to activate the ACIS earlier to avoid this jolt in power delivery. What I did was connect the vacuum actuator valve (the thing that activates the ACIS) to the vacuum switching valve (the thing that controls the opening of the secondary intake). The secondary intake supposedly is activated at 3.2 K rpm, nearly 1K rpm earlier than the ACIS actuator ( at 4.2K rpm). All I had to buy was a few feet of vacuum tubing, other than that its just a matter of moving a few other vacuum tubes around. My initial impression is that power delivery is smoother but am not sure if the car pulls harder overall. I cant post pics but If you need more details to try this yourself email me at ahausheer@yahoo.com and I can give clear and specific details. Anyone ever try other ACIS mods, like keeping it permanently engaged? Cant find a dam thing online but ill keep experimenting.
Very happy with my Solara but I seriously want more power and speed, is there nothing we can do?
- ahausheer
- Just Licensed SolaraGuy
- Posts: 23
- Joined: Mon Nov 15, 2010 6:56 pm