AFM Simulators
Thread Starter
Melting Slicks
Joined: Dec 2018
Posts: 2,455
Likes: 131
From: Lewisville, TX
AFM Simulators
I was reading another thread where people were talking about taking the AFM actuators off regarding melting issues. Well that got me thinking about simulators which I thought would be like o2 simulators but I've now seen they're plates.
Do they make your car sound better being it's a valve that's now open, basically like pulling the fuse for the NPP? I drive in manual mode so I wouldn't have to worry about it switching to V4 which I think would be most peoples issue. I know sound is subjective but in my opinion the car sounds great above 3500 rpm or so, cruising speeds it's a little to quiet.
Seems like there's got to be a negative otherwise more people would be doing it.
What I was thinking was doing the simulators and putting the fuse back in for the NPP to have better sound and more control over it or just leaving it wide open if that doesn't work. Anyone have any experience doing this or something like it? Thanks.
Do they make your car sound better being it's a valve that's now open, basically like pulling the fuse for the NPP? I drive in manual mode so I wouldn't have to worry about it switching to V4 which I think would be most peoples issue. I know sound is subjective but in my opinion the car sounds great above 3500 rpm or so, cruising speeds it's a little to quiet.
Seems like there's got to be a negative otherwise more people would be doing it.
What I was thinking was doing the simulators and putting the fuse back in for the NPP to have better sound and more control over it or just leaving it wide open if that doesn't work. Anyone have any experience doing this or something like it? Thanks.
Instructor
Joined: Jan 2021
Posts: 155
Likes: 23
From: CT
AFM are for eco mode to help the sound and back pressure for 4 cylinder mode. The simulators help with failure of the actuator from the heat of the exhaust. People remove them from the exhaust and use the simulators to keep the CEL light from coming on because they have been removed from the exhaust. All the simulators do is have a starting point and a end point to trick the module in to thinking the valves are acting correctly and will have no real impact on sound when driving in regular modes like sport, track modes.
Instructor
Joined: Apr 2020
Posts: 121
Likes: 17
From: Gilbert, AZ
My AFM actuators failed....without any track days. Started a few weeks ago, loud banging like the actuator is tripping out and opening and closing very hard. I turn my selector and it goes away, but always returns. Not driving her until they are replaced. No CEL either. Just the loud banging sound. Sounds horrible.
Last edited by 17C7Z51; Mar 3, 2021 at 05:47 PM.
2nd Gear
Joined: Jul 2025
Posts: 2
Likes: 1
AFM are for eco mode to help the sound and back pressure for 4 cylinder mode. The simulators help with failure of the actuator from the heat of the exhaust. People remove them from the exhaust and use the simulators to keep the CEL light from coming on because they have been removed from the exhaust. All the simulators do is have a starting point and a end point to trick the module in to thinking the valves are acting correctly and will have no real impact on sound when driving in regular modes like sport, track modes.
Thank you
Burning Brakes
Joined: Nov 2016
Posts: 1,189
Likes: 436
From: San Dimas CA
Process? Remove the AFM valve actuators from the existing exhaust system, remove the existing exhaust system, install the new exhaust system, bolt the AFM simulators (which should come in the kit) to the AFM valve actuators. Basically, just follow the instructions that come with the kit. No CEL will light.
Supporting Vendor
Joined: Nov 2015
Posts: 1,252
Likes: 278
From: Orange County, NY
Corsa setups for C7 Stingray retain the oem afm valves and do not disturb anything about them so no cel worries. Happy to discuss that and the very last Corsa C7 double x midpipe I do have in stock ready to ship brand new. Call or text for the fastest replies 201-575-0861
-Ciro
-Ciro
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http://www.corvetteexhaustsystems.com
845-476-8881
sales@corvetteexhaustsystems.com
201-575-0861 (cell to call or text)
Your Ultimate Resource For Headers, Exhaust Systems & more for Corvette! I carry Corsa, Kooks, ARH, Borla, Billy Boat, Akrapovic, Capristo & Much More
