New to the LS game
04-18-2018, 08:23 AM
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New to the LS game I have a 2002 trans am ws6 it still a 5.7 liter but finally got time to do some upgrades to it.. so far i have: 317 ported heads with a valve job done as well, fast 92 intake, fast loud mouth throttle body, BTR Stage 4 cam kit with a 660 lift, fast fuel injectors and a slp cold air intake... is there anything else that you recommend i change on the motor?
04-18-2018, 08:35 AM
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[QUOTE=JoeNova;19879627]Yeah, get rid of the 317s. They drop compression enough that you'll notice the power loss.[/QUOTE
thats what i read up on but the guy i have building them is a well known guy who has built heads for a lot of fast guys down here and he said he could work them to where i won’t have a problem with that..
thats what i read up on but the guy i have building them is a well known guy who has built heads for a lot of fast guys down here and he said he could work them to where i won’t have a problem with that..
04-18-2018, 08:47 AM
#4
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They will have to be milled ~.032 to get back to stock LS1 compression. That also puts you in the territory of needing shorter pushrods. So for the cost of new heads, machine work, and pushrods, you might pick up 15-20 horsepower over stock heads depending on how good the port/valve job is.
That's about the same amount of power you would have gained with mildly ported 243/799 heads without the need to mill them or pay for pushrods. You also would've avoided possible PTV issues that come with milling heads with a large cam.
That's about the same amount of power you would have gained with mildly ported 243/799 heads without the need to mill them or pay for pushrods. You also would've avoided possible PTV issues that come with milling heads with a large cam.
04-18-2018, 09:11 AM
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They will have to be milled ~.032 to get back to stock LS1 compression. That also puts you in the territory of needing shorter pushrods. So for the cost of new heads, machine work, and pushrods, you might pick up 15-20 horsepower over stock heads depending on how good the port/valve job is.
That's about the same amount of power you would have gained with mildly ported 243/799 heads without the need to mill them or pay for pushrods. You also would've avoided possible PTV issues that come with milling heads with a large cam.
That's about the same amount of power you would have gained with mildly ported 243/799 heads without the need to mill them or pay for pushrods. You also would've avoided possible PTV issues that come with milling heads with a large cam.
04-18-2018, 09:55 AM
#6
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Piston to valve clearance. Milling the heads puts the valves closer to the piston. A cam that holds that valves open longer and a valve that is already closer to the piston could make them come in contact with each other.
Doesn't happen often, but that's usually because people aren't milling their heads that much with a cam that large unless they have some kind of game plan.
Doesn't happen often, but that's usually because people aren't milling their heads that much with a cam that large unless they have some kind of game plan.
04-18-2018, 10:23 AM
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Piston to valve clearance. Milling the heads puts the valves closer to the piston. A cam that holds that valves open longer and a valve that is already closer to the piston could make them come in contact with each other.
Doesn't happen often, but that's usually because people aren't milling their heads that much with a cam that large unless they have some kind of game plan.
Doesn't happen often, but that's usually because people aren't milling their heads that much with a cam that large unless they have some kind of game plan.
