Valve spring recommendations?

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75slant6 said:
Yeah I asked Ken at Oregon cams if they send a spring recommendation and he said they leave that up to whoever is assembling the heads. He did say he’d recommend around a 90-100# seat pressure
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LOL, make it someone else's problem, it make's it easier to wash their hands of any issues later down the road.
Considering springs can kill cams and he grinds cams, he should be giving you a seat and nose pressure, to help minimize you having a potential lobe issue, not fobbing it off to someone else.:rolleyes:
I bet he'd be giving you spring advice if you went back to him with a cam failure.
 
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He obviously can’t tell him what exact spring to run but he can give pressures which it sounds like he might’ve done.
 
75slant6 said:
I bought a set of the bare heads but then I bought the valves from Speedmaster for those heads. So should I maybe just take the heads to the machine shop and have them measure the install height and recommend me which springs to buy?
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You'll need retainers, spring seats, locks seals.
.492-505ish lift? After the lifter angle probably more like 480-496 lift.
I would run around 120-130lbs seat and 305 -320lbs open.
Comp cam #978 springs are what I'd use at a glance.

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cookietruck said:
He obviously can’t tell him what exact spring to run but he can give pressures which it sounds like he might’ve done.
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He just gave him a seat pressure, which is useless considering all the different spring rates you can have.
Now he's here asking us, which is just ridiculous..
 
Bakerlite said:
He just gave him a seat pressure, which is useless considering all the different spring rates you can have.
Now he's here asking us, which is just ridiculous..
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He’d given me a range of open pressure as well, but I honestly don’t remember what it was. I’ll have to call him and find out what it was for sure.
 
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