Tomorrow my 2008 4.7l cams will be installed and running will post more once installed
2008 cam install
moparman_2004
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Alright, so I re-measured all 3 camshafts. I will admit that the 08 camshafts are a little bit bigger but not sure how much this counts for on a camshaft, and I'm not sure how to calculate the base circle since the 08 have a larger barrel but the same size journals. On a side not I was going on 2 hrs of sleep yesterday and 4 today. Anyways here is what I have after measuring 8-10 times in the last hr.
Stock: Intake-1.9735
Exhaust-1.9675
Journals-1.025
Base Circle-1.738
2008+: Intake-2.012
Exhaust-1.9885
Journals-1.025
Base Circle-1.738
Now I know how to figure out the lift but on the 08 I'm not sure where the barrel is thicker. I know the rocker arm ratio is 1.85, any help figuring this out would be great. Thanks and sorry for all the conflict.
Stock: Intake-1.9735
Exhaust-1.9675
Journals-1.025
Base Circle-1.738
2008+: Intake-2.012
Exhaust-1.9885
Journals-1.025
Base Circle-1.738
Now I know how to figure out the lift but on the 08 I'm not sure where the barrel is thicker. I know the rocker arm ratio is 1.85, any help figuring this out would be great. Thanks and sorry for all the conflict.
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960 Posts
Ok I don't have my sheet but believe you measure from heal to toe as measurement A and the base circle as B subtract A from B and times by 1.85 rocker ratio
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647 Posts
Yea I came up with 507 intake and 463 exhaust. Either way it's pretty close to your and stampede's measurements. Also I apologize for getting all my measurements mixed up and causing a rant on your thread. Now all we need is the LSA and duration....
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960 Posts
Duration and lsa need degree wheels for but did you keep the 08 cams or you return them already
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647 Posts
I kept them.
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960 Posts
Ya the little bit of increase in the lobe when multiplied by the follower ratio is where you get the increase in numbers over stock I knew 3 people couldn't of screwed up numbers that bad
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647 Posts
Yea man I was exhausted, found the numbers really close to stock(wasn't aware that little bit would make a difference), and I then found that link so I was second guessing myself. I'm glad I talked with a few guys on DT and re measured. Either way the dealer refused to refund them.
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960 Posts
Damn really
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647 Posts
Now I just need to figure out which valve springs to use with either cam. Should I go with the beehive springs or buy new HO springs?
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960 Posts
Personally comp cams springs
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960 Posts
CCA 26113-16 are the ones I'm running
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647 Posts
Thanks man. Are you using stock retainers and locks?
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Yes not really any upgraded parts available for those aftermarket yes but not upgraded
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I think craigslue is using comp cam 792 retainers with his 26113 springs. I called comp cams and the tech couldn't advise anything since these springs were made for the ford 4.6l 2 valve engine. But he did say if he was installing the 26113 springs on a 4.6 then he would use the 792 retainers. But you are the 2nd person that I have verified that used the stock retainers with the beehive springs. I'm sending a set of heads to killians tom and want to make sure I get him everything needed to do the p&p and valve job.
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960 Posts
Unless you wanna drop the money stocks are plenty
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Cool I just got off the phone with Jerry and he said the same thing. I appreciate the help.
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Ya no problem what's he charging to do a port and polish
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He's charging 500 for the p&p and I think around 300-400 to do the valve job, install the new springs, and deck the heads to ensure flatness.
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960 Posts
Not bad
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