What is the difference in the block between Active Fuel Management and non?
04-03-2015, 01:34 AM
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What is the difference in the block between Active Fuel Management and non? Just like the title says. I know that AFM has a different lifter valley cover with hydraulic actuators and passages, and I know it uses collapsible lifters to shut off those cylinders, but what are the differences in the block? Also, do non AFM gen IV blocks have the provisions for AFM?
A little backstory: I have a brilliant beyond expensive idea
I've had a '89 Firebird (V-6... weak sauce..), my Grandpa (may he rest in peace) bought an '87 T/A new, and my whole family has been Pontiac people for decades. I want a third-gen T/A. But I don't want no run-of-the-mill 305 or 350 powering it. That's not very 'me'. No, I want a 5.3 (or BETTER! though I'm kinda partial to the 325.1 C.I., because then I can get 326 badges for it!). But even just a garden-variety 5.3 is not quite awesome enough... No, I wanna see what one of these highly aerodynamic cars can do for MPG when it's only got 4 cylinders running it on the highway!
A little backstory: I have a brilliant beyond expensive idea
I've had a '89 Firebird (V-6... weak sauce..), my Grandpa (may he rest in peace) bought an '87 T/A new, and my whole family has been Pontiac people for decades. I want a third-gen T/A. But I don't want no run-of-the-mill 305 or 350 powering it. That's not very 'me'. No, I want a 5.3 (or BETTER! though I'm kinda partial to the 325.1 C.I., because then I can get 326 badges for it!). But even just a garden-variety 5.3 is not quite awesome enough... No, I wanna see what one of these highly aerodynamic cars can do for MPG when it's only got 4 cylinders running it on the highway!
