5.3 ls6 cam and ls6 heads
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Early- 204/211, .525/.525, 116LSA
Late- 204/218, .551/.547, 116LSA
To be honest, for a 5.3, you would be better off with the early cam, as the late one loses too much low end power.
Since the LS6 heads have larger chambers you'll lose compression and the power will be about the same as before or less, especially torque.. the gains if any will be higher in the RPM range and it's gonna suck if you're putting this in a truck.
If you mill the heads then you may gain 20-30, in the upper rpm range, and you'll lose some down low.
If you mill the heads then you may gain 20-30, in the upper rpm range, and you'll lose some down low.
TECH Senior Member
Joined: Jun 2016
Posts: 22,298
Likes: 3,619
From: Central Cal.
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Verdad Gallardo I wonder if anyone every tried an LS6 cam and advanced it a few degrees to see how the low end would look in that scenario...
That's kind of what I meant by a turd. no low end grunt. But in a Suburban, that translates into LOST fuel economy, because you constantly need more pedal to get it moving. I thought about advancing it, but the exhaust opens so early that you still lose energy. really, the best thing would have been to just swap in a cam motion drop in cam. If I still had the truck, that's what would happen.
That's kind of what I meant by a turd. no low end grunt. But in a Suburban, that translates into LOST fuel economy, because you constantly need more pedal to get it moving. I thought about advancing it, but the exhaust opens so early that you still lose energy. really, the best thing would have been to just swap in a cam motion drop in cam. If I still had the truck, that's what would happen.
Thanks for the insight on the advanced LS6 cam, been kicking that around for a while but I don't yet have the grasp on valve events and how to read the big picture like you do.