Valve springs - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 04-10-2007, 01:52 AM Thread Starter
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Valve springs

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
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post #2 of 4 (permalink) Old 04-14-2007, 04:09 PM
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That is interesting. :Thumbup:

-Charley, 1995 Nissan hardbody, single cab,2.4 i-4, 5spd, straight piped - 4.5in tip, 2x Rockford Fosgate R1's

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post #3 of 4 (permalink) Old 04-28-2007, 04:07 AM
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what did that set of springs run.$.?

96 2500 215 pump,CompR62,DDP3's,suncoast convter,6'lift
96 3500 12v auto,Bullseye CompR62 DDP3's,suncoast converter
95 1500 318 auto "for now"
99 1500 360 auto "for now"
95 1500 Bullseye Powered P-Pumped 24v. [email protected]
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post #4 of 4 (permalink) Old 04-29-2007, 04:08 AM Thread Starter
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They were a set of F1 valve springs. And he said that te PDR springs were just as good. I paid 625 for my to be overnighted so he could put them on.

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
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