Valve locks - Stamped vs. Hardened Steel - Team Camaro Tech
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post #1 of 8 (permalink) Old Jan 23rd, 17, 04:04 PM Thread Starter
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Valve locks - Stamped vs. Hardened Steel

What would be the application for each of these? I'm assuming that stamped steel locks are suitable for street/cruiser type of engines, and hardened Steel locks are more for strip/racing engines? I know that my Edelbrock etec 170 heads have stamped steel locks.

67 Black RS Coupe, 383, M21 & 10 Bolt Posi. Edelbrock E-Tech 170 Heads, 2204 Roller Cam, Air Gap Intake.
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post #2 of 8 (permalink) Old Jan 23rd, 17, 04:17 PM
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Re: Valve locks - Stamped vs. Hardened Steel

Chad, the two are not the same. Not sure what everyone else uses with stock stuff and retainers, but I always match the retainer to the lock. Its my understanding over the years that 7 hardened locks with stock retainers.

I have gone a step further when I went to taller spring ,longer valves and higher spring pressures. Because my heads cam with titanium retainers I use the recommended hardened keepers for 8MM valves. The costs are not that great to ensure lock pull thru. What you don't want is to use them with the alloy retainers.

You may get mixed views on this subject but everyone has their own idea.

Don
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post #3 of 8 (permalink) Old Jan 23rd, 17, 04:21 PM Thread Starter
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Re: Valve locks - Stamped vs. Hardened Steel

Don - So what would the benefit be upgrading from stamped steel to hardened locks with stock Edelbrock retainers?

67 Black RS Coupe, 383, M21 & 10 Bolt Posi. Edelbrock E-Tech 170 Heads, 2204 Roller Cam, Air Gap Intake.
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post #4 of 8 (permalink) Old Jan 23rd, 17, 04:52 PM
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Re: Valve locks - Stamped vs. Hardened Steel

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Originally Posted by cv2065 View Post
Don - So what would the benefit be upgrading from stamped steel to hardened locks with stock Edelbrock retainers?
For me, Safety of pulling thru , provided you don't have aluminum retainers. It's a case as I was needing keepers as I change when ever I go thru springs or valves. Its the same as running stamped steel against hardened rocker arm plates. One will eat the other.

Don
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post #5 of 8 (permalink) Old Jan 23rd, 17, 05:15 PM Thread Starter
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Re: Valve locks - Stamped vs. Hardened Steel

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Originally Posted by zdld17 View Post
For me, Safety of pulling thru , provided you don't have aluminum retainers. It's a case as I was needing keepers as I change when ever I go thru springs or valves. Its the same as running stamped steel against hardened rocker arm plates. One will eat the other.
On stock Edelbrock heads, I'm assuming that there would really be no benefit?

67 Black RS Coupe, 383, M21 & 10 Bolt Posi. Edelbrock E-Tech 170 Heads, 2204 Roller Cam, Air Gap Intake.
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post #6 of 8 (permalink) Old Jan 23rd, 17, 05:20 PM
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Re: Valve locks - Stamped vs. Hardened Steel

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On stock Edelbrock heads, I'm assuming that there would really be no benefit?
Like I said, for me , it's one of those expendable maintenance items when you have something apart. Habit I got working in oil field and Murphy's law. Time is money.

Don
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post #7 of 8 (permalink) Old Jan 23rd, 17, 07:36 PM
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Re: Valve locks - Stamped vs. Hardened Steel

What Don is alluding to is that valve train parts are considered to be consumable. You replace them regularly if you are running high RPM with exotic metals in your valve train. If you are worried about the locks failing change your valve spring retainers and locks out for ten degree instead of the stock seven degrees. Mild steel retainers and standard forged steel locks will work just fine on the street. (that is where the stamping enters into it).

You can buy tool steel keepers (locks), titanium, retainers with hardened lash caps for your titanium hollow stem sodium filled valves and run triple wound PAC alloy springs if you want; just not on the street, because these exotic metals have a very short lifetime (even at street use RPM levels).

I run these parts on my race car so that I can rev a BBC like a SBC and have the lifter follow the cam and valve to close and open only when allowed by the cam (no bouncing, no floating and no lofting a lifter over the nose). These parts can easily double the price of some aluminum BBC heads. (about a third of the price of my professionally ported Big Dukes). I don't run anything other than stock parts on the street now as I don't race any more. Saves me a fortune that I now give out weekly to doctors just so that I can have a social life (it is sad that the people in the waiting room know you by name because that is were you live at my age).

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post #8 of 8 (permalink) Old Jan 23rd, 17, 08:28 PM Thread Starter
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Re: Valve locks - Stamped vs. Hardened Steel

Thanks for the detailed explanations! I'll just stuck with the stamped locks that came with the heads. Nothing but street use here.
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67 Black RS Coupe, 383, M21 & 10 Bolt Posi. Edelbrock E-Tech 170 Heads, 2204 Roller Cam, Air Gap Intake.
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