On a C7 LT1 automatic when using one of these units, am I correct in assuming that the AFM exhaust valves will stay open.

Four cylinder activation is especially annoying when the NPP exhaust is open in Sport mode and then it goes to quiet mode at reduced throttle. Does the Disable Device solve this?

 

It was my understanding that that device only disabled displacement on demand DOD.

 

DOD = AFM

Both refer to the engine going into 4 cyl mode. I have a manual, and have no need for a disabler, so I can't answer the OPs question based on experience.

 

Yes, the Range Technology device will disable AFM.

With an automatic, even with AFM disabled, the NPP behavior based on ESM (Engine Sound Management) setting is even more of a curiosity..and more intrusive vs. M7 even in Track/Off.

Meyerweb has done exhaustive testing of the M7 ESM and has it well documented.

I have had the AFM disabled on my 2015 A8, and even in Track, the NPP closes WAY more frequently than the M7 did. I never could figure out the pattern 100% like we had on the M7. I found it intrusive on the A8 to the point that the fuse pull was the only option for me. Now it's great.

So the bottom line is that the automatic folks with AFM disabled will be shocked at just how much the NPP close in ESM Track/Off. So then pull the fuse to see the difference. Night and day IMO. M7 is less of a shock since AFM is only in Eco. And there's no way to differentiate NPP from AFM events until AFM is disabled since both sets close in V4 mode.

Only caveat for use is that it draws a -small- amount of power when the car is off. So it's recommended to unplug it if leaving the car more than a few days (I'd say a week). Or use a battery maintainer.

 

Guys,

If anyone is interested in disabling the DOD / AFM the right way we do offer a complete solution for the LT1 engine.

GM LT1 DOD Delete Kit

http://www.livernoismotorsports.com/...elete-Kit.html

This kit includes everything you need to convert over your LT1 DOD/AFM engine to a non-DOD/AFM engine. The core of this conversion is based around the custom billet CNC delete plate which fits under the factory valley cover. This CNC machined piece is an exact fit for the factory valley cover and allows for easy conversion of the factory system, while still retaining the OEM PCV baffling. The tray has built in o-rings which seal off the oil passages and allow for a fully functional non-DOD/AFM system, giving you full performance and choice of an array of performance camshafts. The rest of the components include everything needed to complete the conversion.


Includes the following Components
 CNC Billet DOD Delete Tray
 Livernois Custom Camshaft
 Double Spring Kit w TI Retainers
 Head and Exhaust Gaskets
 Non-DOD/AFM Lifters & Buckets
 Livernois Camshaft Phaser Limiter
 Head Bolts, Crank Bolt, Cam Bolt
 1 Piece 5/16 Pushrods

Available for these Applications
2014+ Corvette C7 (6.2L)
2014+ Pickup Truck (6.2L)
2014+ Pickup Truck (5.3L)

Feel free to give us a call for more information on our Corvette performance products or visit our website today!

313-561-5500
info@livernoismotorsports.com
http://www.livernoismotorsports.com/

 

Far better solution IMHO than the range device. This can also be disabled with a tune.

 

Thanks for the response. Your input is appreciated, it's exactly what I suspected was the situation.

 

Thank you for the kind words, and that is a great point I completely forgot to mention.

We do offer an excellent custom tuning solution using the Mycal tuning device. We can set up custom dyno tune files for customers remotely using our device and also offer to disable the AFM / DOD this way as well.

 

I found it incredibly annoying with the auto. I wish they had it active only in Economy Mode like the manuals. I turned mine off with a Diablo tuner and left it off with the supercharger tune. I still got 27.8 mpg on a recent trip to Charleston, SC. 1,300 miles including driving around town and still got 27.8mpg even with cruising at 80-85 on the highway.

 

I have the AFM delete on my car, we did it when the cam went in. Texas Speed sells a kit for it.

Not sure why anybody would want to drive a 4 cylinder Corvette

 

I tried the Range AFM disabler on my 2014 C7 automatic for a couple of days, I did not have NPP, but I do have a Flowmaster exhaust.

It was great not letting it go to 4 cylinder mode, but I had some issues with the car stalling when coasting to a stop.

The car probably needed to learn the new settings, but I was not willing to take a chance and returned it, I almost got T-boned while making a left.

Now the car does kick in to 4 cylinder mode, but with the Flowmasters it stays loud, it just sounds like a GTR or Import at times, coarser than the V8 tone which is smooth. I actually don't mind it.