PJC Racing
New Member
- Nov 21, 2007
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If the I/H is too tight this will increase seat spring pressure, if the pressure is too high it can cause the lifter to not pump up (noise). Usualy on a shorter stem the I/H will be affected, the spring will be compressed more than a longer valve. I have dealt with this issue before with longer stems. Remember each one of these things all play a part, you need to start measuring your whole valve train to get it right (pushrods included).