Valve to piston clearance?

[LS6_Silverado]

Hey guys im upgrading my 1.75 compcam rockers to 1.85 ratio. Which makes my new lift .600/.595, do you guys think i will have any valve to pistion clearance issues? Or should i be alright, also i have flat top pistons.
Thanks

[RedHeartbeat]

You should not have issues. I ran a .610 lift cam on 234 duration without issue.

[LS6_Silverado]

With 243 heads and flat top pistons? Im just asking because i found this article on car craft.

"The valve-to-piston clearance in swapping LS6 heads on another Gen III engine is also an issue because GM has used multiple piston dome/dish and cylinder head combinations. Going with the small LS6 combustion chamber cylinder heads, a nearly 0.600-inch lift cam, and a flat-top piston will challenge the accepted 0.080-inch clearance between the piston and valve at max lift and piston TDC. This is best accomplished by using modeling clay (not Play-Doh or similar play clay, as it "springs" back giving a false reading) between the valve and piston during the "mock-up" stage of the engine build"

WebsiteGeneral Motors Gen III V-8 Cylinder Head Comparisons - Car Craft Magazine

I just wanna be absolutly sure about this. Any help opinions and comments would be greatly apreciated.

[RedHeartbeat]

LS1 engine with LS6 heads

[NITROUS]

I'm running the Patriot 243 LS6 64cc heads with a .588" lift cam. What is your cumbustion chamber size and what gaskets did you use? The stock LS6 heads have longer valve stems. I actually have that magazine here at the house and had my doubts so I had to perform some clearance checks. A major difference between 385-horse and 405-horse LS6 cams is the base circle radius. The base circle for the ’01 LS6 is smaller than that of the LS1 and the truck cams and, for MY02, it’s even smaller. Most Gen III cams have a 19.7-mm. base circle but the ’01 LS6’s is 19.3 and the ’02’s is 19-mm.. Both reductions were to accommodate increases in valve lift. My concern would be the valves in the 02 and newer LS6 heads are 0.6-mm. longer than the valves in all other Gen III engines to accomodate the base circle differences. For this the reason I went with Patriot heads and LS1 valves because I didn't want to end up with a set of 243 heads that had longer valves. I'm no expert but I did alot of research before my swap.