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Old 02-03-2009, 12:00 PM
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Springs for hyd f/t cam?

This probably show you all my huge lack of knowledge, but here it goes:

On Ebay I saw a couple of vortec cylinder heads that, according to the seller, were equipped with springs for hyd f/t cam.

Are there other springs for a hydraulic flat tapped cam than it is for a roller cam?
What would happen if I put those heads for example on a factory roller block?

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Old 02-03-2009, 12:18 PM
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You should ask the seller for clarification in this case. Sometimes they change springs on these heads to handle more lift cams over .500/ I believe factory, they were olny rated (the springs) to handle 470ish on the lift, but in this case, I would ask the seller for clarification.
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Old 02-03-2009, 12:28 PM
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Yes I know. These heads are supposed to be "fresh from the machine shop", so mods like guide bosses machined down etc. are done.

The springs are described to handle 0,620" lift. That's pretty much.
If I had a cam with, say ,530" lift, was is ok to use those springs then? I mean, can springs be too stiff?
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Old 02-04-2009, 06:48 PM
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Quote:
Originally Posted by staleg
Yes I know. These heads are supposed to be "fresh from the machine shop", so mods like guide bosses machined down etc. are done.

The springs are described to handle 0,620" lift. That's pretty much.
If I had a cam with, say ,530" lift, was is ok to use those springs then? I mean, can springs be too stiff?
Yes.

Check the spring specs from the cam maker as to recommended seat pressure and open pressure and compare to the spring specs on the heads.

Higher pressures, then recommend, can wear the cam faster.
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Old 02-05-2009, 07:26 AM
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vortec heads on ebay

Hey guys those are my heads and my auction.... What a coincidence!!! a fellow Hotrodder!!
These are the springs that are on these heads please follow go to this link and check it out!!! It does infact say (when you click the apps. tab) that they can be used for hydralic roller cams!!!

http://store.summitracing.com/partde...21+4294863036+

This is the kit they were shipped to me in from summit, along with the cam and lifters.
http://www.jegs.com/i/Lunati/638/60105LK/10002/-1#

see photos

i couldn't find the max lift on summit, but this link to jegs has a better description of the same spring
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Old 02-05-2009, 07:29 AM
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sorry wasn't done yet

any way here's the spring kit and specs from jegs, I ordered it from summit though cuz it was cheaper but they don't have the max lift listed

http://www.jegs.com/i/Lunati/638/60105LK/10002/-1#
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Old 02-05-2009, 07:33 AM
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cams

If you look through lunati's MANY DIFFERENT CAMSHAFTS, THIS IS THE RECOMENDED SPRING FOR ALMOST ALL OF THEM BELOW 550 LIFT.

iF YOUR CAM IS ONLY 530 LIFT ROLLER OR NOT YOU WILL BE FINE WITH THESE SPRINGS
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Old 02-05-2009, 08:11 AM
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You have the wrong Jeg's link listed, both are for the cam. Yes those will be fine.
Correct link.>>>>>>
http://www.jegs.com/i/Lunati/638/73943K1/10002/-1#
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Old 02-05-2009, 03:41 PM
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thanks

thanks ssedan, my bad
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