L99 Delete Whats involved?

[mlee]

Originally Posted by Zabo

Hmm, maybe it could be as easy as pulling the Deac Solenoid.. :/

Or a Flux Capacitor...

[Gib]

This has been covered in great detail in past post. I am having a speed shop remove the AFM and completly re-build the top end with all the good SStuff, new heads, cam and all the bolt on's...Do it right & get-r done!

[Keedy]

Originally Posted by Zabo

I'm starting to think the the Hotrodders of today are going to move from wrenches and hoists to HDDs and Laptops..:/

And the geek shall inherit the earth.

Bwahahahahahahahahhahahahaha!!!



Hahaha!!!!





































Bwahahahahahahaha! =D


hah!

[GeorgeInNePa]

Unless the L99 is completely different from the L76 (I don't think it is), to get rid of the AFM you need to change:

valley pan

Cam (if you are changing to a 3 bolt cam you'll need a timing chain and gear set, along with the bolts or just the upper sprocket if you want to reuse the chain)

LS2 timing chain dampner (many of the L76s had broken dampners on disassembly)

lifters

lifter buckets

valve springs (and related items-locks, retainers, seals, etc)

push rods

LS3 PCV hose and block off for the rear driver side valve cover tube

2 head gaskets

new balancer bolt (stock is a TTY bolt)

new tune that turns off the AFM and tune for the new cam

That's if you want to physically get rid of the AFM. If you just want it shut off, you have have the tune changed to do that.

[Vash]

Now that's some nice info thx. I was thinking someone out there had already taken an in depth look at the engine on other platforms.

[GeorgeInNePa]

Originally Posted by Vash

Now that's some nice info thx. I was thinking someone out there had already taken an in depth look at the engine on other platforms.

There aren't a whole lot of differences between the L76 and the L99

There's a 12 cubic inch difference. The L99 has the cam phaser as well as AFM. I'm not sure, but I think the L99 gets the sodium filled intake valves like the LS3. The L76 has the same heads as the L99 and the LS3, but gets solid intake valves.

The intakes and throttle bodies are the same. The LS3 gets a forged crank, the L76 is cast, I'm not sure about the L99.

[Zabo]

Originally Posted by GeorgeInNePa

but I think the L99 gets the sodium filled intake valves like the LS3.

O_O

HELL YEAH FIREWORK VALVES!!!!

Trust me, if you don't know what I'm talking about..cut one open from behind a blast screen.

[Vash]

Bah I bet it's Melamine not Salt!

Well I doubt it would be that easy. But if there is a signal ground or pos that controls the mode might be able to just put a switch on it. Like it should be already from the factory without the Fedzilla in your car's bidnaz.

[Grape Ape]

Originally Posted by Vash

Bah I bet it's Melamine not Salt!

Well I doubt it would be that easy. But if there is a signal ground or pos that controls the mode might be able to just put a switch on it. Like it should be already from the factory without the Fedzilla in your car's bidnaz.

There are at least 4, as the ECM carefully deactivates each one (during either the power or compression stroke, I forget which).

I would like it if switching the transmission to manual mode would disable the AFM. But that is enough switch for me since I'm pretty sure that the ECM will be able to moderate the AFM for better mileage than the driver could.

[DGthe3]

Originally Posted by Grape Ape

There are at least 4, as the ECM carefully deactivates each one (during either the power or compression stroke, I forget which).

I would like it if switching the transmission to manual mode would disable the AFM. But that is enough switch for me since I'm pretty sure that the ECM will be able to moderate the AFM for better mileage than the driver could.

The valves are closed after the powerstroke, to trap the exhaust gasses.

[gunslinger]

From the Service Book above:

"The pin housing contains the lifter plunger and pushrod seat which interfaces with the pushrod. The outer housing contacts the camshaft lobe through a roller. During V8 mode, when all cylinders are active, the locking pins are pushed outward by spring force, locking the pin housing and outer housing together causing the lifter to function as a normal lifter. When cylinder deactivation is commanded ON, the locking pins are pushed inward with engine oil pressure directed from the valve lifter oil manifold (VLOM) assembly solenoids."

The lifters sound like the weak part of the AFM system.

The VVT, on the other hand looks awesome!

[stovt001]

Originally Posted by Zabo

I'm starting to think the the Hotrodders of today are going to move from wrenches and hoists to HDDs and Laptops..:/

You've just now come to that conclusion? We're already there and its been that way for years. Wrenches and hoists will still be part of the picture though. You can't download headers right? But the tune is what will get the most out of the mods you bolt on.

[Supermans]

I'm glad I'm sticking with the LS3, this thing has more moving parts and you all know what that means down the road..

[MerF]

Originally Posted by jsharp

I want to choose my own cam and mods and not be afm based mods all while having an automatic.

Why? If it was that big of a deal for you to have that much availability right off the bat, buy the LS3.

Or wait for more AFM-friendly set-ups.