Is flycutting for the exhaust actually required?
03-09-2007, 01:08 PM
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Is flycutting for the exhaust actually required? I'm getting mixed info on this. A reliable sponser of the board says that I absolutely DO NOT need to flycut for the EXHAUST valves. My set up is prc stage 2.5 ls6's with 2.04 and 1.575 valves milled to 59cc's, .040 cometics and the ms4. The bottem end is stock. I felt like an idiot after talking to them the second time about this, and I don't want to name them. I did a lot of searching, and I'm still confused.
03-09-2007, 01:29 PM
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i rarely have to cut the exhaust side. 90% of the time it always the intake side as he says. remember the piston chases the exhaust valve up, where the intake valve chases the piston down. overlap/earlier IVO causes ptv issues.
Last edited by JPH; 03-09-2007 at 04:08 PM.
03-09-2007, 02:07 PM
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Originally Posted by ss2000
I'm getting mixed info on this. A reliable sponser of the board says that I absolutely DO NOT need to flycut for the EXHAUST valves. My set up is prc stage 2.5 ls6's with 2.04 and 1.575 valves milled to 59cc's, .040 cometics and the ms4. The bottem end is stock. I felt like an idiot after talking to them the second time about this, and I don't want to name them. I did a lot of searching, and I'm still confused.
03-10-2007, 09:05 AM
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Originally Posted by ss2000
anyone know where to buy checker springs for an ls1 or are they same as old school chevy springs?