Valve spring choice

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Valve spring choice Empty Valve spring choice

Post  68galaxie on May 4th 2019, 11:15 am

I think it may be time to replace the valve springs.
I have Manley 221424 springs installed. They check out at 250 to 265 lbs @ 2.00"
The car is driven perhaps 100 miles a year - street driven with occasional blasts to 6600 rpm.
Springs are 10 years old - but still check out as far as seat pressure goes.

3 choices:

Manley 221424 (leaning to this again)
PSI-1224
PAC-1224

Solid roller cam (276/290 .454/.450 lobe), stainless Ferrea valves.

Cheers
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Post  Lem Evans on May 4th 2019, 8:20 pm

If those Manley "blue stripe" springs have not broken an inner spring and still check good for pressure I'd give them another year.

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Post  kjett on May 6th 2019, 8:24 am

Lem Evans wrote:If those Manley "blue stripe" springs have not broken an inner spring and still check good for pressure I'd give them another year.

^^Yep
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Post  away on May 6th 2019, 9:06 am

Dang......apparently I have been changing mine way sooner. But I am bracket racing which I guess is different than what he is doing I guess.


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Post  rmcomprandy on May 6th 2019, 2:13 pm

When valve springs "break" it is 99% of the time during the initial run. After that, they simply deteriorate; sometimes quickly but, most of the time it happens slowly.
So, if you have a good spring which has not yet deteriorated past "runable", I would use what has been tested.

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Post  Lem Evans on May 6th 2019, 2:34 pm

rmcomprandy wrote:When valve springs "break" it is 99% of the time during the initial run.  After that, they simply deteriorate; sometimes quickly but, most of the time it happens slowly.
So, if you have a good spring which has not yet deteriorated past "runable", I would use what has been tested.

That's what I've observed with those 'blue stripe' springs.....if an inner spring breaks it'll happen in the first 20 or so passes.

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Post  68galaxie on May 7th 2019, 1:51 pm

Thank you all !
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