Eaton Charger + AFM (DoD) removal issue

[2boosted]

patience is a slow internet connection !!!!!

Post the answer already Buys guys (Busy I guess)

[pl4yboy]

I'm betting this is one of those... DOH! moments. He'd have posted the info already otherwise. We all have those moments. No big deal.

[2boosted]

Pl4boy!!!!!!!!! missed u !

He lives in DOHHHHH moments... believe me !

[farmtruc]

I'm betting this is one of those... DOH! moments. He'd have posted the info already otherwise. We all have those moments. No big deal.

How much would you like to bet it's not an obvious issue lol? I'm still waiting for someone to post the answer.
I swear, if I post the answer, and someone replies, "oh ya, when you do that, you're supposed to do that, because if not, that will happen" I'm gonna, hahahah....
( just for saying that, i do expect a lot of smartass replies)

[2boosted]

dude... you are so teasing.....

If I put a $5 bill in your thong string, will you give the answer !!!!

Help the community bro !

[farmtruc]

Ok, so to recap, we replaced all the lifters in a DoD engine, come to find out, truck has a slight miss on cylinders 1,4,6,7.
All other DoD delete past installs have always included an aftermarket no deactivated lobe cam.

After scratching our heads for a while, we decided to perform a compression test, even though we knew the engine hadn't seen over 3K rpms and hasn't been on the road yet (blow piston, broke ring, etc).

Results:
1,4,6,7 had 120psi
2,3,5,8 had 170psi

For those who don't know, the DoD cams have four different lobes.
The non deactivated lobes are different than the deactivated lobes.
The difference: when you install a standard lifter on a deactivated lobe, it will act as though it has another 40-50 degrees of duration.

I did know that the DoD cam was different, because we've ordered DoD aftermarket comp cams in the past, but it didn't occur to me that it would act differently.

Here's an example of a DoD cam we ordered not too long ago:

As you can see, for us performance guys, it's really not worth the extra gain.
But that doesn't mean we don't install them or there isn't a power increase.

The cam is a 210/218 .500/.500" 114LSA +4 advance
(but the DOD lobes are actually 212/220)

Use cam core 156-000-13

Use these lobe numbers:
13300R/13302R HR 114 +4 (for non-deac cylinders 2,3,5,8)
13310R/13312R HR 114 +4 (for deac cylinders 1,4,6,7)



lesson learned,

[pl4yboy]

Honestly, I knew as soon as I saw the compression numbers. I didn't think about the cam because for some reason, I guess I just expected that it was supermarket when I read the first post.

[2boosted]

correct me if I'm wrong.............

VVT had 2 lobes and AFM had 2 more..............

Early truck version were only AFM ?

[GMCwantsLS1]

I guess they are trying to make extra torque on the cylinders that don't deactivate for the 4cyl mode.

[farmtruc]

Honestly, I knew as soon as I saw the compression numbers.

Ya, so did we, but who the hell does a compression test on a new truck, lol, that was last on our list.
Lifter/rockers were stock quiet, so we knew everything was mechanically sound, but didn't know until...

just glad it was fixed that same day and customer was on his way.