304 Valve Spring Upgrade?

[ScoHar]

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?

 

[greenfoam]

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

 

[ScoHar]

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

 

[xx5047]

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]

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]

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