Were absolute speed Stg II heads milled?
12-22-2005, 09:56 AM
#1
Were absolute speed Stg II heads milled? I got a set of AS stg II heads used and put them on my car. They have worked great,but now I am looking at a bigger cam, and need to know if AS milled them. I really dont want to pull them again to check PTV clearance, for just a cam swap. I was able to get 410+ rwhp with a 224/224/116 cam .558 lift. looking at something like a LG G5X2 cam on a 114.
Anyone know
Anyone know
12-22-2005, 11:18 AM
#2
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It depends on if the buyer had them milled. I say chances are pretty good they were, but who knows. even if they were not milled, they may have bigger valves as well. I would check fot PTV, there is a method where you don't pull the heads to check. I believe Comp sells a kit where you use a different spring in place of your valve spring and you push down on it and measure the clearance at different timing itervals.
Dan
Dan
12-22-2005, 06:02 PM
#4
ptv is one of the most crucial check on a cam swap. why skimp out on that? If its wrong, the motor is trashed upon first start up. fine you can save a few hundered bucks by not doing it, then youll be paying thousands later for a motor rebuild. 
12-22-2005, 06:17 PM
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I got the 5.3's with no milling. If I had gone with 5.7's I would have milled. What is the 3 digit part number on the head? Were the heads his CNC heads or the hand heads?
Jay recommended a cam in the .575 zone for the heads that I got.
Jay recommended a cam in the .575 zone for the heads that I got.