Afm/dod delete

[SSChris15]

In 2019 one of my lifters failed, dealer ship replaced everything car has ran fine since then, till today. Once again a lifter has failed. Does doing the dod delete help this is issue?

[AlisoBob]

YES!!! All the lifters stay in the "Locked" position. I have a AFM/DOD delete module in the classified section.

[1JEWLDSSRS]

Originally Posted by AlisoBob

YES!!! All the lifters stay in the "Locked" position. I have a AFM/DOD delete module in the classified section.

False.. It does not lock your lifters. The range "disabler" device just changes the tune in the ECU to tell it "disable" the AFM/DOD program for the 4 lifters, they will still function as normal lifters do, but the delete kit you inquired about contains the following, all the lifters are REPLACED. Good luck.

https://www.texas-speed.com/p-7379-t...SABEgJUYvD_BwE

[morepowerjoe]

Yes you should do definitely do the dod delete kit if you want to stop replacing those darn lifters all the time, and its a great opportunity to change your camshaft since you'll have to anyways.

[AlisoBob]

Originally Posted by 1JEWLDSSRS

The range "disabler" device just changes the tune in the ECU to tell it "disable" the AFM/DOD program for the 4 lifters, they will still function as normal lifters do

Yes.... by leaving them locked. When the locking pins fail to fully engage, thats when you get tons of valve lash, and stuff gets all torn up.

The Range disabler keeps this from ever happening by not letting the lifters transition to the AFM/DOD position.

[1JEWLDSSRS]

Originally Posted by morepowerjoe

Yes you should do definitely do the dod delete kit if you want to stop replacing those darn lifters all the time, and its a great opportunity to change your camshaft since you'll have to anyways.

OP, here is how the AFM in our engines work. If you do the delete, it would be a good time to do a cam swap as well. and delete the AFM/DOD in a custom tune.

https://help.summitracing.com/knowle...SR-04901/en-us

[gtstorey]

You really don’t have an option on whether to swap the cam on an actual DOD lifter swap to regular lifters. The cam lobes on the DOD cylinders are different.

[cerberus_ss1]

Yeah, a DOD delete could definitely help with your lifter issues. It's worth considering for better reliability and performance. But it's smart to chat with a mechanic first.

[AlisoBob]

Originally Posted by 1JEWLDSSRS

OP, here is how the AFM in our engines work.

https://help.summitracing.com/knowle...SR-04901/en-us

Thats not how it works at all. When the solenoid opens, oil pressure is forced onto the sides of the lifter, pushing the locking mechanism's IN, which unlocks the inner lifter body from the outer.

[gtstorey]

Originally Posted by AlisoBob

Thats not how it works at all. When the solenoid opens, oil pressure is forced onto the sides of the lifter, pushing the locking mechanism's IN, which unlocks the inner lifter body from the outer.

I can’t really tell much difference in what summit says and what you are saying. Maybe where the oil flows in? All summit really says is that oil flow causes the lifter to collapse. It doesn’t say by what mechanism.

[1JEWLDSSRS]

After digging deeper into this, I actually learned something from Mr Bob that I wasn't aware of with these lifters! They actually DO lock up with a pin and oil pressure control, I just thought it was only the oil pressure that did the work. Here is the video I found that explains it pretty well. I did though have the function of them correct, just didn't know there was a sliding pin involved.

[AlisoBob]

Originally Posted by 1JEWLDSSRS

After digging deeper into this, I actually learned something from Mr Bob that I wasn't aware of with these lifters! They actually DO lock up with a pin and oil pressure control

Well, thats the goal of these forums, right? To spread good info.
By defeating the AFM/DOD you keep the lifters "Locked" and avoid the chaos that comes with a lifter lockpin failure.

(I still have a RANGE module in the classifieds..... hint, hint)

Bob

[AlisoBob]

Also..... IF I ever have a L99 cam disaster, I'm for sure not going to put another hydraulic lifter cam back in. Why do all that work for nothing?

I'll step up to a solid roller deal. Just a few more parts like adjustable rocker arms is all that's needed.