Build Your First Engine
We brought the stock cylinder heads to M&R Machine for a rebuild, which consisted of installing new bronze valve guides, cutting the seats on a Serdi valve machine, and decking the heads. Here, cylinder-head assembler Johnny Gonzalez reinstalls the stock springs after checking the seats and open pressures at the proper installed height. We were surprised to find that the used springs were still in great shape, with 130 pounds on the seat and 220 pounds of open pressure at 0.0500 inch of lift, more than adequate for the stock cam and the Lunati we upgraded to. View Related Article
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