d3ve info
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dfree383
kcengines
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d3ve info
kcengines July 1st 2015, 5:10 pm
New member here. Working on a set of d3ve heads. I need to know what the valve stem installed heights are suppose to be . These heads have been previously worked on and the heights are all over the place. Any help would be greatly appreciated.
kcengines- Posts : 5
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Re: d3ve info
dfree383 July 1st 2015, 5:36 pm
The valve spring installed height depends on the parts you are using.
What are you measuring at now & how much are they varying ?
What are you measuring at now & how much are they varying ?
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kcengines- Posts : 5
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Re: d3ve info
rmcomprandy July 1st 2015, 6:36 pm
kcengines wrote:What I'm looking for is the total stem height.
That would depend entirely upon the valve seat heights.
The OEM intake valve is 5.204" over all length ... OEM exhaust valve is 4.983" over all length.
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Re: d3ve info
kcengines July 1st 2015, 6:54 pm
I have OEM intake and exhaust valves. I need to know the OEM height from spring seat to valve tip.
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Re: d3ve info
rmcomprandy July 1st 2015, 7:47 pm
You might come across an acceptable RANGE of spec in a 1975 or so Motors Manual. There were several versions of that casting number head.
Good Luck.
Good Luck.
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Re: d3ve info
supervel45 July 1st 2015, 8:24 pm
http://vintage.mitchell1.com/PClubData/chassis/den73/V2D735078.pdf Page 5-82 has some specs. They are not to the tip of the valve though.
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Re: d3ve info
IDT-572 July 2nd 2015, 2:18 pm
You must be using the factory bolt down rockers, and need the tip of stem height. Deck height, how much the heads have been milled, and cam base circle come into play also.
You probably already know this, just saying ! ! ! ! !!
You may need to get custom push rods to make it work.
You probably already know this, just saying ! ! ! ! !!
You may need to get custom push rods to make it work.
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Re: d3ve info
dfree383 July 2nd 2015, 2:32 pm
2x what blake said, may want to figure out why they are all different first and get that remedied.
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Re: d3ve info
kcengines July 2nd 2015, 5:10 pm
Yes using factory pedestals. Somebody installed seats. Now stem height is all over the place. Was trying to find OEM spec. so I could go from there.
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Re: d3ve info
rmcomprandy July 2nd 2015, 5:27 pm
kcengines wrote:Yes using factory pedestals. Somebody installed seats. Now stem height is all over the place. Was trying to find OEM spec. so I could go from there.
Install a rocker arm and find whatever length will work best with the geometry available and put them at that height.
Remember ... a NON-roller tip rocker geometry starts valve tip contact near the inside and rolls toward the outside of the valve tip during lifting.
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Seats
ED468 July 11th 2015, 4:12 am
I bet the seats where put in at different depths as well as the valve job off some.
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