Valve Float - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 27 (permalink) Old 02-07-2009, 07:28 PM Thread Starter
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Valve Float

I've have been doing some research on some valve train setups for a couple of "projects" I have going on and stumbled across a couple of videos that I thought everyone might find interesting.



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post #2 of 27 (permalink) Old 02-07-2009, 07:40 PM
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Re: Valve Float

Springs are supposed to be bouncy....... right....

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post #3 of 27 (permalink) Old 02-07-2009, 07:45 PM
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Re: Valve Float

very cool, interesting to see how they react to hi-rpms

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post #4 of 27 (permalink) Old 02-07-2009, 09:50 PM
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Re: Valve Float

Thats pretty cool!
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post #5 of 27 (permalink) Old 02-07-2009, 10:12 PM
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Re: Valve Float

Maybe you could spec us out some springs that won't float......
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post #6 of 27 (permalink) Old 02-08-2009, 12:25 AM
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Re: Valve Float

I watched those not more than a month ago when I was wondering about this myself. I am not convinced our valvetrain is working as planned above 2600 or so rpm.

I personally don't even know that my lifters aren't getting a bit "short" on me up top.
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post #7 of 27 (permalink) Old 02-08-2009, 02:43 AM Thread Starter
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Re: Valve Float

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Originally Posted by Charles View Post
I watched those not more than a month ago when I was wondering about this myself. I am not convinced our valvetrain is working as planned above 2600 or so rpm.

I personally don't even know that my lifters aren't getting a bit "short" on me up top.
My lifters are not are not getting shorter up top

Big benefits to have solid lifters.

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post #8 of 27 (permalink) Old 02-08-2009, 02:51 AM
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Re: Valve Float

Valve float is easily discernible on the dyno and you would have to be over 100lbs of boost to get out of the controllable range of properly set up hypermax springs. The lazy lobes and low rpm's more than compensate for any boost un-seating. Factory lifters should be good to about 350 lbs before the valving needs to be changed or solid rollers need to be used.

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post #9 of 27 (permalink) Old 02-08-2009, 03:08 AM
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Re: Valve Float

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Originally Posted by Machinist View Post
Valve float is easily discernible on the dyno and you would have to be over 100lbs of boost to get out of the controllable range of properly set up hypermax springs. The lazy lobes and low rpm's more than compensate for any boost un-seating. Factory lifters should be good to about 350 lbs before the valving needs to be changed or solid rollers need to be used.
At what rpm for all this?
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post #10 of 27 (permalink) Old 02-08-2009, 03:20 AM
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Re: Valve Float

Makes sense why you hear DW say "he broke a motor". Hence broke a valve spring/dropped a valve. That puts it into perspective.

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