Join Date: Apr 2006
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Today at Hamilton Diesel I found out the true reason for needing Heavy Duty Valve springs. He has a plate that he can bolt up to the exhaust manifold and preasurize the exhaust ports. At 62 psi the valves opened. So if the head was hot we all know that the springs become a little weaker. So at around 45 to 62 psi the valves open. He then took a head with Heavy duty valve springs an did the same thing. The valves did not open the gauge was hitting 80 psi and valves were not opening.
It was just pritty cool to see the reason for needed them.
2002 dodge 2500 4x4, ATS stage 5 tranny, ATS billet flexplate, ATS torque commander, ARP headstuds, BHAF, custom S300 64/14 turbo, Big FASS fuel system, Industrial 10 holes, .093 tubes, Edge juice w/ attitude, smarty, Haisley streep puller cam, Hamilton Diesel head and orings, PDR valve springs, ATS exhaust manifold, Gauges, 285/75/16 BFG allterrians, front and rear replacements, and 5" exhaust.
:smoke '95 3500 4x4 dually red
raymac racing engine, big cam, fly cut pistons, 650cc pump, 26* timing, 5x18 EDM injectors, industrial s400