joel787
Zone Head
Posts: 590
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posted January 29, 2013 09:50 PM
what is the psi on stock valve springs?
And what would be a good after market replacement? I've seen from 57-67...any difference on these? Stock motor
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joel787
Zone Head
Posts: 590
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posted January 29, 2013 09:59 PM
 Edited By: joel787 on 30 Jan 2013 06:00
Ok so I found this..[Quote]The stock valve springs have a seat pressure of 24-26psi and Carpenter springs have 52psi at an installed height of 1.325".
Now, the heaver the springs the harder it bangs on the head?
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kawa74
Expert Class
Posts: 226
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posted January 29, 2013 10:45 PM
Higher spring pressure is to keep follower (bucket) in contact with cam. It will let you Rev higher with more margin of Safety. They prevent Valve float, which can be catstrophic .
Valves hitting pistons, breaking Valve heads off, = total Destruction-183 times per second @ 11,000.
Valve seats will get pounded a little harder, but not enough to worry about
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"I have never met a man so Ignorant that I coun't Learn from him"..."Galileo"
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joseph702
Zone Head
Posts: 598
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posted January 29, 2013 11:08 PM
I had a cam bucket explode over loosing a shim , ape springs worked great after . If u have a extended ecu IMO it's a must
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joel787
Zone Head
Posts: 590
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posted January 30, 2013 05:55 AM
ama get them, but are all the same?, some are 52psi all the way up to 67psi...does it matter or just get the cheapest?
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joseph702
Zone Head
Posts: 598
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posted January 30, 2013 06:07 AM
If not building a crazy motor 52 would be fine like the carpenter springs, too much and u loose power
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