Valve spring ?'s
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Lead Driver
Joined: Dec 2002
Posts: 5,491
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From: Kuna ID
Valve spring ?'s
I am swapping heads and adding a cam this summer. I have already ordered a cam/lifter set and I am planning on doing a simple rebuild with an extra set of heads I have. Motor is an 85' 460 with 127k miles, and I have a set of 80k mile heads from a 77 lincoln. I am going to have the lincoln heads cleaned, do some port work, replace the seals and lap the valves. I am trying to get at least 5 years from this motor before I do a CTD swap and right now the valve seals are shot and I have a dead lifter.
Question #1-When I remove the valves from the heads, do they have to go back in the positions I removed them from?
Question #2-Would there be any benefit to using one set of valve springs over the other, lincoln vs. ford?
Question #1-When I remove the valves from the heads, do they have to go back in the positions I removed them from?
Question #2-Would there be any benefit to using one set of valve springs over the other, lincoln vs. ford?
Lead Driver
Joined: Mar 2004
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#1 yes, if you are not going to get them ground, they have to go back in where they came from.
#2 I'd just get a new set of springs for the cam you are going to use. Old single springs probably won't work very good. New springs are cheep.
#2 I'd just get a new set of springs for the cam you are going to use. Old single springs probably won't work very good. New springs are cheep.
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Lead Driver
Joined: Dec 2002
Posts: 5,491
Likes: 16
From: Kuna ID
Ok, I'll look into getting some springs. Should I go with OEM springs or something aftermarket. Will I also have to replace the head bolts when I swap heads? I'd like to have all my parts together to minimize down time. 
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Lead Driver
Joined: Dec 2002
Posts: 5,491
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From: Kuna ID
I got the cam from summit and they did have a recommended set of springs, but they were a bit pricey. Shouldn't be a problem to find a different brand with the same specs though right?
Post Fiend
Joined: Mar 2004
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From: Union, Washington
What's the point in buying a good cam then not get it's full potential by using inferior valve springs? Always buy the cam kit which includes cam, lifters and springs. They are designed to work properly together.
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Lead Driver
Joined: Dec 2002
Posts: 5,491
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From: Kuna ID
I looked for a kit that included the springs but didn't see one. It just had a list of recommended parts that happened to include some springs. If I can't find other springs I can at least order the recommeded springs through work since they were name brand. Then I can use my discount. 
This is also my first cam swap, so I'm learning here. I have swapped heads before, but never a cam. After doing some searching in here, it also looks like I need to find an older(1970) timing set to throw on as well.
This is also my first cam swap, so I'm learning here. I have swapped heads before, but never a cam.
After doing some searching in here, it also looks like I need to find an older(1970) timing set to throw on as well.
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Lead Driver
Joined: Dec 2002
Posts: 5,491
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From: Kuna ID
I am going to order the recommended valve springs and I also found an adjustable timing gear set as well. I have one more question though. Are the valves adjustable, or will I just torque them down and be done with it?
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Lead Driver
Joined: Dec 2002
Posts: 5,491
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From: Kuna ID
Here are the cam specs.
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,500-4,000
Intake Duration at 050 inch Lift: 204
Exhaust Duration at 050 inch Lift: 214
Duration at 050 inch Lift: 204 int./214 exh.
Advertised Intake Duration: 262
Advertised Exhaust Duration: 272
Advertised Duration: 262 int./272 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.479 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.504 in.
Valve Lift with Factory Rocker Arm Ratio: 0.479 int./0.504 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,500-4,000
Intake Duration at 050 inch Lift: 204
Exhaust Duration at 050 inch Lift: 214
Duration at 050 inch Lift: 204 int./214 exh.
Advertised Intake Duration: 262
Advertised Exhaust Duration: 272
Advertised Duration: 262 int./272 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.479 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.504 in.
Valve Lift with Factory Rocker Arm Ratio: 0.479 int./0.504 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.