Sitter mekaniska lyftare.
Provtrycker man insugssidan så öppnar insugarna redan vid 1.7bar, det kan väl inte vara bra om dom öppnar när dom inte ska det?
Jag har kanske fel vet inte, Det är kanske värre om avgasarna öppnar men på dessa topparna är det högre
tryck på fjädrarna förstärkt avgasbroms.
Hittade den här texten handlar om en cummins men ändå
(Stock springs have 78-82lbs of
pressure seat pressure on average at 1.380". If you are over 35psi(boost or drive presure) and 3,800 rpm, stock springs do not fully
control the valvetrai).
This allows a few negative things to happen. First,
valve float, which can cause serious damage to the valvetrain. Second, intake and
exhaust valves can be blown open by boost and exhaust drive pressure which allows reversion. Reversion can hurt your power potential by allowing exhaust gasses to enter the cylinder on the intake stroke. Inert gasses in the exhaust, when re-introduced into the cylinder shield the
fuel particles from oxygen in the cylinder. This does a few things that negatively affect power. It increases the time delay from start of injection to start of combustion, it decreases the maximum pressure and maximum
temperature reached in the cylinder and it increases the total time needed to completely burn the available fuel. Correct valve
spring pressure is a very important piece of power production.
