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Old 11-11-2004, 01:18   #1 (permalink)
Jim Mock You Rock
 
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Valve spring pressures and power?

Hi all.. how are you?
What are the advantages of running stiffer valve springs? Do they kill the valve guides? What are the advantages of running stiffer springs?
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Old 11-11-2004, 01:25   #2 (permalink)
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Re: Valve spring pressures and power?

they keep the rocker on the cam... with steap profiles and wild lift the valve spring can not provide enuf force to keep the rocker and roller in contact with the cam, this causes valve float, the valve does not close quck enuf...
Stiffer springs get rid of this problem... But they do chew up usefull kw's to operate em..
The aim is to have the weakest spring you can have without risking valve float, any thing more is waste
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Old 11-11-2004, 02:10   #3 (permalink)
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Re: Valve spring pressures and power?

Ok so stiff springs must add to valve train loss and power loss....How does valve float affect performance?
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Old 11-11-2004, 02:41   #4 (permalink)
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Re: Valve spring pressures and power?

causes miss firein.... aka valve bounceing
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Old 11-11-2004, 04:25   #5 (permalink)
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Re: Valve spring pressures and power?

Your a top bloke...thanks..
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Old 11-11-2004, 07:01   #6 (permalink)
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Re: Valve spring pressures and power?

Quote:
Originally Posted by INJECTED250
causes miss firein.... aka valve bounceing
At high rpm.
Stronger springs will also allow the engine to rev higher as valve bounce
tends to limit revs.
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