AFM (aka DOD) functionality after swap

[chvy=power]

Gm's vvt system retards timing, it does not advance timing any greater than it would be on a non vvt engine. Advancing the timing is how more power is made. So I don't understand, on a stock vvt vs a non vvt engine, how the vvt engine would make more power anywhere in the rpm range. The vvt simply retards cam timing in hope to improve fuel economy. And trust me, based on the 3 different LY6s Iv owned, fuel economy isn't all that great on them with or without the Vvt. All it does when the vvt kicks in, is make you have to press the pedal further to the floor to maintain the same speed and power as you had before it kicked in. So in my opinion, what a pain in the A$$!

On another note, I do find it quite neat that your trying to keep it on your swap and hope all goes well!

[chvy=power]

In reference to the 454 vs the vvt engine....the 454 probably has some cylinder heads, with hogged out runners that require high rpm to make any power, and same goes for the camshaft. Obviously a big donkey dick cam is gonna be a terd down low in the rpm. Mate the hogged out heads and a big cam in the 454, and a stock 5.3 will make more power down low

[Nak]

This is a pretty good article about VVT, complete with dyno comparisons:

http://www.hotrod.com/how-to/engine/...formance-test/

[Nak]

In reference to the 454 vs the vvt engine....the 454 probably has some cylinder heads, with hogged out runners that require high rpm to make any power, and same goes for the camshaft. Obviously a big donkey dick cam is gonna be a terd down low in the rpm. Mate the hogged out heads and a big cam in the 454, and a stock 5.3 will make more power down low

What I like about the L94 is that it isn't just making more power down low, it's also making more power up high. The graphs show the 454 only has a torque advantage within a very narrow RPM band, just a couple of hundred RPM.