Re: How much will valve spring dampers add to seat pressure
[Re: ragtop]
#3000581
01/01/22 11:43 AM
01/01/22 11:43 AM
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Joined: Jun 2008
Posts: 3,913 usa
lewtot184
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master
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Re: How much will valve spring dampers add to seat pressure
[Re: ragtop]
#3000588
01/01/22 12:10 PM
01/01/22 12:10 PM
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Joined: Mar 2011
Posts: 3,056 Michigan
A727Tflite
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master
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Michigan
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How much lbs of seat pressure will stock dampers add to stock small block single springs? Thank you. Most have no effect on seat pressures, just off seat. It’s for harmonics, not pressure.
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Re: How much will valve spring dampers add to seat pressure
[Re: ragtop]
#3000598
01/01/22 12:39 PM
01/01/22 12:39 PM
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Joined: Mar 2011
Posts: 3,056 Michigan
A727Tflite
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The reason I ask is because I am trying to get an aftermarket spring as close to the specs of the factory 340 spring, but the factory springs are rated without the damper and the aftermarket springs are rated with the damper. So if I can get an approx pressure at any seat height that the damper adds, I can more accurately compare the different aftermarket springs to the factory spring. I’m thinking the 60’s and early 70’s manuals called out the added rate of just the damper. For some reason between 5 and 10 lbs. comes to mind.
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Re: How much will valve spring dampers add to seat pressure
[Re: lewtot184]
#3000640
01/01/22 02:27 PM
01/01/22 02:27 PM
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Joined: Jan 2003
Posts: 10,667 North Dakota
6PakBee
I Live Here
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I Live Here
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North Dakota
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I just looked in the '69 parts book and service manual and the only engine I could find with a damper was the Hemi. And the specification listed in the service manual was less damper.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: How much will valve spring dampers add to seat pressure
[Re: ragtop]
#3000696
01/01/22 04:14 PM
01/01/22 04:14 PM
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Joined: Jan 2003
Posts: 4,707 Moved to N.E. Tennessee
GomangoCuda
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Moved to N.E. Tennessee
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Does it really matter? No one can see it and no one is going to measure the pressure. Just get an appropriate spring for your cam.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: How much will valve spring dampers add to seat pressure
[Re: GomangoCuda]
#3000713
01/01/22 04:51 PM
01/01/22 04:51 PM
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Joined: Mar 2011
Posts: 3,056 Michigan
A727Tflite
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All the aftermarket springs that use them include the damper in the rates.
Again, the seat pressure is not affected by the damper.
I looked through all my papers and can’t find the damper rate in the AMA papers, so I grabbed a stock max wedge spring from back in the day.
On my scale accurate to a gram it shows 6.9# just before bind.
Last edited by Transman; 01/01/22 05:02 PM.
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Re: How much will valve spring dampers add to seat pressure
[Re: A727Tflite]
#3000725
01/01/22 05:04 PM
01/01/22 05:04 PM
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Joined: Jan 2003
Posts: 10,667 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,667
North Dakota
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All the aftermarket springs that use them include the damper in the rates.
Again, the seat pressure is not affected by the damper.
I looked through all my papers and can’t find the damper rate in the AMA papers, so I grabbed a stock max wedge spring from back in the day.
On my scale accurate to a gram it shows 6.9# just before bind.
In other words, insignificant. Thanks for doing this, real world data is invaluable.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: How much will valve spring dampers add to seat pressure
[Re: ragtop]
#3001000
01/02/22 03:45 AM
01/02/22 03:45 AM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
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I Win
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Posts: 43,007
Bend,OR USA
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How much lbs of seat pressure will stock dampers add to stock small block single springs? Thank you. What year and size S.B. I've change inner dampeners getting the coil bind height set up correctly, I'm going to guesstimate maybe 3 to 6 lbs .060 from coil bind by themselves
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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