Someone please shed some light on DOD
Registered User
Joined: Apr 2007
Posts: 619
Thank you! 
THAT is an answer to the real question 1stls1 is asking 
("how" does it work, and thus, how would mods affect the system).
If that's the case, how/why would a camshaft affect anything, really?
Under most driving conditions, the lifters would all be pumped up, and the high lift cam would be operating as intended. Under low load, so half of the lifters don't pump up ... big deal?! (no? 
)
And again, as someone mentioned, if it's a big concern, then just have AFM programmed out when you get the computer tuned to match the mods done anyway (ie: heads/cam).
But please, someone enlighten me if I'm way off base here?!
THAT is an answer to the real question 1stls1 is asking ("how" does it work, and thus, how would mods affect the system).If that's the case, how/why would a camshaft affect anything, really?
Under most driving conditions, the lifters would all be pumped up, and the high lift cam would be operating as intended. Under low load, so half of the lifters don't pump up ... big deal?! (no? )And again, as someone mentioned, if it's a big concern, then just have AFM programmed out when you get the computer tuned to match the mods done anyway (ie: heads/cam).
But please, someone enlighten me if I'm way off base here?!
Registered User
Joined: Jan 2006
Posts: 881
From: Jacksonville Florida
Not that I've read over at the Charger forum. The biggest obstacle to modding the Hemi is cracking the ECM. "Hal" as we call it, is a tough nut to crack. But things like intake, heads, exhaust have been done to the Hemi's and I've not heard of any MDS related problems.
Registered User
Joined: Nov 2007
Posts: 94
Thank you! THAT is an answer to the real question 1stls1 is asking ("how" does it work, and thus, how would mods affect the system).
If that's the case, how/why would a camshaft affect anything, really? Under most driving conditions, the lifters would all be pumped up, and the high lift cam would be operating as intended. Under low load, so half of the lifters don't pump up ... big deal?! (no? )
And again, as someone mentioned, if it's a big concern, then just have AFM programmed out when you get the computer tuned to match the mods done anyway (ie: heads/cam).
But please, someone enlighten me if I'm way off base here?!
THAT is an answer to the real question 1stls1 is asking ("how" does it work, and thus, how would mods affect the system).If that's the case, how/why would a camshaft affect anything, really?
Under most driving conditions, the lifters would all be pumped up, and the high lift cam would be operating as intended. Under low load, so half of the lifters don't pump up ... big deal?! (no? )And again, as someone mentioned, if it's a big concern, then just have AFM programmed out when you get the computer tuned to match the mods done anyway (ie: heads/cam).
But please, someone enlighten me if I'm way off base here?!
If I were in the biz, I’d be plan on shipping my aftermarket cam with higher ratio rockers. Hell if the stock cam isn’t too bad maybe someone will just sell high ratio rockers without a cam.
Registered User
Joined: Feb 2006
Posts: 515
I don't see a problem on DOD. The key is the computer progaming and there will be many companies that will figure it out.
There should be in about a year after intro the first flash programers out to adjust the car.
They have yet not made a computer they have not cracked yet.
Heck with variable valve timing the possibilities are endless.
There should be in about a year after intro the first flash programers out to adjust the car.
They have yet not made a computer they have not cracked yet.
Heck with variable valve timing the possibilities are endless.
Thread Starter
Registered User
Joined: Feb 2004
Posts: 648
From: West Palm Beach, FL
Sorry Big Al, AFM not DOD, I got it. This is what I wanted, to get people to talk about this to hear diff inputs. I know what the basics are as far as shutting down cylenders and all that, but what mods would do to the AFM. Thanks for all the input everybody!
Registered User
Joined: Apr 2007
Posts: 619
I don't see a problem on DOD. The key is the computer progaming and there will be many companies that will figure it out.
There should be in about a year after intro the first flash programers out to adjust the car.
They have yet not made a computer they have not cracked yet.
Heck with variable valve timing the possibilities are endless.
There should be in about a year after intro the first flash programers out to adjust the car.
They have yet not made a computer they have not cracked yet.
Heck with variable valve timing the possibilities are endless.
Registered User
Joined: Mar 2005
Posts: 307
The way AFM works.
8 of the lifters in 4 cylinders have a spring loaded pin in them.
When they are being used(accerelation, load, etc)the spring pushes the pin out so the inside of the lifter locks with the outside of the lifter, allowing it to open the valve. When the AFM is active, a solenoid lets oil into the side of the lifter, pushing against the spring loaded pin. Then the inside of the lifter moves independently of the outside, keeping the valves closed.
http://www.superchevy.com/technical/.../photo_03.html
8 of the lifters in 4 cylinders have a spring loaded pin in them.
When they are being used(accerelation, load, etc)the spring pushes the pin out so the inside of the lifter locks with the outside of the lifter, allowing it to open the valve. When the AFM is active, a solenoid lets oil into the side of the lifter, pushing against the spring loaded pin. Then the inside of the lifter moves independently of the outside, keeping the valves closed.
http://www.superchevy.com/technical/.../photo_03.html
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