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Tgreen3724 · 06-02-2015, 11:15 AM

running a BBC cast iron head (casting 188) with Comp 947 springs and in order to clear the rocker arms I need to reduce stack height by .045. To get my stack height back should I remove the locator cups completely and just run the springs on top of a .015 shim or should I machine .045 off of the bottom of the locator cups (leaving .015 of thickness). Without cups I have approx. .105 of clearance between the ID of the inner most spring and the od of the valve guide. I do not run seals so clearance between spring and seal is not needed. What are your all thoughts?

06-02-2015, 11:15 AM	#1
Tgreen3724 Junior Member Join Date: Oct 2007 Location: Shepherdsville, Ky Posts: 38 Likes: 0 Liked 1 Time in 1 Post	BBC Spring Locator Cups Question? running a BBC cast iron head (casting 188) with Comp 947 springs and in order to clear the rocker arms I need to reduce stack height by .045. To get my stack height back should I remove the locator cups completely and just run the springs on top of a .015 shim or should I machine .045 off of the bottom of the locator cups (leaving .015 of thickness). Without cups I have approx. .105 of clearance between the ID of the inner most spring and the od of the valve guide. I do not run seals so clearance between spring and seal is not needed. What are your all thoughts?