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Re: valve springs

Subject: Re: valve springs
by ddgonzal on 2022/2/21 19:03:58

A12s have a red line of 6400 rpm, meaning the stock valve springs are designed to reliably rev that high

Double valve springs create more friction, thus higher wear, lower fuel economy and less power. To make more power at higher RPMs, it needs more camshaft, large port head, and stiffer valve spring. And a willingness to rev it up and shift every few seconds