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SKU #: HAM-07-S-003 Hamilton 103 Pound Valve Spring Set 98.5-18 5.9L / 6.7L Dodge Ram Cummins

Purchase Hamilton 103 Pound Valve Spring Set 98.5-18 5.9L / 6.7L Dodge Ram Cummins
    • 1998.5-2018 5.9L / 6.7L Dodge Cummins

Description

Stock 24v springs allow the intake valve to completely blow open at 50psi on the bench, but still start to open at 35psi. This is a major problem and it is intensified as RPM increases. With high driv ... read more

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Stock 24v springs allow the intake valve to completely blow open at 50psi on the bench, but still start to open at 35psi. This is a major problem and it is intensified as RPM increases. With high drive pressures your engine might even be experiencing reversion, when the exhaust valve blows open on the intake stroke contaminating the intake charge. Get control of your valves with a set of Hamilton springs.

Stock springs have 78-82lbs of pressure seat pressure on average at 1.380". If you are over 35psi (boost or drive pressure) and 3,800 rpm, stock springs do not fully control the valvetrain. 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. Triple Shot peened and stress relieved.

FOR COMPARISON: Not all 24valve springs are created equal. Hamilton has started seeing other companies market products that are called 110lb 24 valve springs, when in reality they have 117-119lb of seat pressure and almost 250lb nose pressure at .320 lobe lift. Also, they are designed as an entry level spring for a dodge neon, but are re-boxed and sold to the diesel crowd. This spring can cause major lobe wear to anything over a stock lift cam. ALL of Hamilton's cams have more than stock lift.

For comparison, Hamilton's 103lb springs have 102-104lb seat pressure and 180lb nose pressure with the 188-220. By running anything other than their 103lb 24v springs with a Hamilton cam, you nullify the warranty. If you run a cam with more than .320" lobe lift and anything other than the 103lb spring you run the chance of experiencing coil bind before maximum valve lift is achieved.

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Specifications

  • SkuHAM-07-S-003
  • ManufacturerHamilton Cams
  • MPN07-S-003

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Rate Hamilton 103 Pound Valve Spring Set 98.5-18 5.9L / 6.7L Dodge Ram Cummins

Reviews may be edited for spelling or grammar inaccuracies and those containing profanity will be removed.

M
Comp,crane,crower, K-motion , H-11 ect . We h...
Comp,crane,crower, K-motion , H-11 ect . We have put them all on our race gas builds. These HAMILTONS are way over priced pieces for what they are. They look, measure and test like a spring from a common mfg. We only used them at request of customer.
D
Man haters gonna hate.. As for me I think th...
Man haters gonna hate.. As for me I think these were a great product from Hamilton. Of course I used them on a diesel build not a gas build so maybe using them for the intended purpose made them work properly?? who knows. I recently installed a new Hamilton cam, tappets, pushrods and these springs. Now I wasn't trying to build a 6K rpm race truck but for the upgraded street cam and a mild build they worked fine (188/220). All specs check out and no problems so far. I assume like all things there is always something better but if 399$ is overpriced maybe you should get a bigger budget. Nothing diesel related is cheap and if it is it won't last. Install is about a 4 on the fear factor but it's made easy with the right tools. Check out the Cummins valve spring compressor tool if you do this with the head on the engine. Install time is a bit long but it also depends on everything you are doing that day. Also try the Fleece baring tool, you will need it for this install. Quality seems great and no reason for me to doubt it otherwise. Price is fair for a set of valve springs. I have a few thousand miles on them now so if something goes bad I will amend this review later, until then stay classy..
J
Verified Buyer
Worth the purchase
Great quality.
Store Reply
Thank you for the review. Agreed, its hard to find any shortcomings with Hamilton's entire line of products.
1 QUESTION
Z

Can you use these valve springs with a stock cam??

Yes, these can be ran with a stock OEM camshaft. - AW

2/18/19

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Hamilton 103 Pound Valve Spring Set 98.5-18 5.9L / 6.7L Dodge Ram Cummins

Hamilton 103 Pound Valve Spring Set 98.5-18 5.9L / 6.7L Dodge Ram Cummins

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