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F-body Mac headers vs Fbody FLP headers
This picture shows the difference between the longtube FLP headers and the midlength MAC headers. The collector inner diameter is noted as well. |
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How to port mac header primaries
Port them out using an air grinder or dremmel with a sanding bit. Key is to grind down the bump of weld all around inside each primary. |
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How to port your throttlebody First do some preliminary porting, making sure you DONT port right at the opening where the blade contacts when shut. Grind down the ridge thats about 1/2" in front of the blade and try to smooth it all out. Then, use JB weld to fill in the big port making sure the epoxy gets DEEP into the hole and wraps around inside the hole so once it sets, it can never fall out. Let it dry, then smooth the epoxy out and drill the hole in the epoxy for the PCV hose. On an F-body, you'll need to drill two holes. The Ybody only needs one. |
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Rocker Clearanceing for some double springs (Pic 1) View from bottom of rocker showing where to grind (using dremmel) |
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Rocker Clearanceing for some double springs (Pic 2)
View from side of rocker showing where to grind (using dremmel) |
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Stock LS1 PCV system layout NOTE: the layout of the LS6 PCV system is different |
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The LS1 "magnet trick" If you are installing a camshaft into your LS1/LS6 and you aren't removing the heads, you can either take your chances and hope the lifter retainers hold the lifter up and keep it from falling, or you can buy 16 retractable pen magnets with the pocket clip on them. You bend out the pocket clip, reach in with the magnet until it grabs hold of the lifter, then you extend the pen magnet until you have JUST enough extension to let the pocket clip hold onto the head. You need to keep it under tension, loose pen magnets won't do you much good. |
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Y-Body vs F-body underdrive pulley
Both of these pulleys are ASP underdrive units. As you can see, the LS1 crank pulley on the vettes looks quite a bit different than on the f-bodies. The main difference is that the belts and accessories all sit further back on the engine since the steering rack on the vette is so close to the front of the motor. |
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Valve spring swap This photo illustrates how to change a valve spring with an LS1 head still installed on the engine. An air hose is run to the spark plug hole to keep the cylinder full of air, which in turn holds up the valves so they don't fall when you try to compress the spring. The spring shown is probably the hardest spring to change on an F-body. |