Should I mill LS7 heads while they're off? I honestly don't know how to do the math, nor what is considered safe/not safe so I'm hoping for a good consensus on this. :) Opinions welcome! The engine already has forged pistons with these specs: Rod - 6.077 C.D. - 1.163 Weight - 460 Pin - 9252” (23.5mm) x 2.250” CC’s - -3.84cc 70cc , 72cc 11.2, 11.0 These pistons use the factory 6.077” Titanium rod, and the stock .9252” (23.5mm) pin diameter The current head gasket is a Cometic which I think is .040" thickness. The heads are going to be ported at WCCH and I'm wondering if I should have them milled? It will see lots of heavy street action, maybe even a missed shift. The cam is still a deciding point but probably between 232 - 242 net intake duration. (.050" lift), and valve lift probably less than .650 for both I/E. It will be paired up with an LSXR intake and 1 7/8" headers. Should I leave well enough alone or do I have room to mill? Is it worth it? Oh yeah, 92-93 pump gas all the way. |
You have plenty of room to mill as I'm sure those pistons have the right valve pockets. What brand pistons are they? Sounds like diamond/Katech. I would mill 15thou to bump your compression to around 11.5:1 (estimate). Also, for you cam choice I would recommend the cam I'm running. It's a 235/250 I/e duration with lift right around .650. I can show you a dyno sheet of the power it made (553/511) through a single 3" cutout. I can also provide you the specs if ur interested, just shoot me a pm. |
you can always take a .002 skin cut to assure flatness, or you could just flat sand them. |
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