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304 Valve Spring Upgrade?

ScoHar

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Does anyone know the specs of the LT1 springs you can fit to these engines for an upgrade?

Specs I have found so far ar:

Installed Height 1.9"
Seat pressure 134psi
Open Height 1.250"
Open Pressure 424psi
Dia 1.460"

Does this sound right?
 
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greenfoam

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Are they the speed pro springs? I have the spec for them
 

ScoHar

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They're the ones we sell at work PEP, specs on speedpro will give me an idea.
 

xx5047

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i know the good ol trw chev lti springs are good for 80,000+km with solid lifter .550 lift cam ,8000+rpm no problems.
 

RVK 355

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Does anyone know the specs of the LT1 springs you can fit to these engines for an upgrade?

Specs I have found so far ar:

Installed Height 1.9"
Seat pressure 134psi
Open Height 1.250"
Open Pressure 424psi
Dia 1.460"

Does this sound right?
are they the specs for the LT1 springs?
 

oldmate74

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LT1 springs are good for cams up to 500-550 lift depending on the brand and are direct fitting. meaning only 1.250 diameter. installed height should be around 1.70 and coil bind should be at least .80"-.100" larger than the lift on the valve.
but they are a perfect spring for any hydraulic cam grind

see page 2 of this pdf under valve springs and look for part#4833
http://www.crowcams.com.au/media/catalogues/35.0 Holden V8 EFI.pdf
 
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