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john billups

08-27-2021 01:22 PM

weak valve spring ?

I think I know but. 305 Chevy, What will a weak or broken spring feel like ? I'm losing rpm at about 6500, the motor sounds like a blurb... have good fuel volume .5 liter per 5 sec. , and psi. 5-7.

brian schuetta

08-27-2021 02:49 PM

Re: weak valve spring ?

How high do you rev this 305? Have you pulled the valve covers yet?

john billups

08-27-2021 04:20 PM

Re: weak valve spring ?

At times its been 7200 at the finish but I have been running 1/8 mile so I short shift. But with a 1/4 race coming up I legged it out and it falls off. M/SA. covers off , no broken springs.

Chevy55

08-28-2021 07:59 PM

Re: weak valve spring ?

Really should have something like this

https://content.speedwaymotors.com/P...7f23254934.jpg

GTX JOHN

08-29-2021 02:56 AM

Re: weak valve spring ?

Best bet is to test them and remove all doubt.

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