cam curious
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From: LA
I wondered how shops/makers got them on accurately without a key in the first place ... wondered if this was one part of the equation between a good 'un and a bad 'un. (The other being squish/compression which is also variable).
I don't have one for the Evo, I am ashamed to say. I see Accurate-Engineering make a nice bespoke one.
Last edited by Dun Roamin; Feb 1, 2015 at 07:52 AM.
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From: SE Louisiana
Agreed, this is why I wondered ... what we are talking is the difference thickness of a piece of paper (a degree).
I wondered how shops/makers got them on accurately without a key in the first place ... wondered if this was one part of the equation between a good 'un and a bad 'un. (The other being squish/compression which is also variable).
I don't have one for the Evo, I am ashamed to say. I see Accurate-Engineering make a nice bespoke one.
I wondered how shops/makers got them on accurately without a key in the first place ... wondered if this was one part of the equation between a good 'un and a bad 'un. (The other being squish/compression which is also variable).
I don't have one for the Evo, I am ashamed to say. I see Accurate-Engineering make a nice bespoke one.
https://www.delkron-mfg.com/products...structions.pdf
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From: ct
So I was just reminiscing from last year's inquiry to see if I missed anything, and thank god for leaking gaskets or I may have just slapped in a cam and lifters. So I'm reminded that it may be tricky to swap the cam gear over, I have a press, it's getting it to be where it should be. How is scribeing a line on old gear going to line up with a scribe on new cam ???
There is no key way or anything? How does the gear not move over time ???
There is no key way or anything? How does the gear not move over time ???
So I was just reminiscing from last year's inquiry to see if I missed anything, and thank god for leaking gaskets or I may have just slapped in a cam and lifters. So I'm reminded that it may be tricky to swap the cam gear over, I have a press, it's getting it to be where it should be. How is scribeing a line on old gear going to line up with a scribe on new cam ???
There is no key way or anything? How does the gear not move over time ???
There is no key way or anything? How does the gear not move over time ???
Last edited by apples402; Jan 4, 2016 at 08:50 PM.
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From: ct
When you look at the cam, on the cam itself behind the gear there is a notch/flat spot. You will place 2 scribe marks on your gear, one on each side of the notch/flat spot. When pressed off these scribe marks will be used for alignment on new cam to the same notch/flat spot. You will see when you are ready to do this that it is not as hard as it sounds.
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From: NYC
Heat the cog (expansion), freeze the cam (contraction), and if you're quick it should drop right in before they equal out and interfere.
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From: Bedford UK
By being a precision fit, as Donald indicates. The two parts are precision machined to a high degree of accuracy, before being assembled. Not much power is transmitted through that join, so ne key is necessary, although one would obviously help with alignment!
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From: NYC
I wonder if the "no key" was an after thought?
I mean, for swopping, replacing and degreeing, it would have been more helpful to have had a line, and some measured scores, e.g. 2° and 4° lines on each side of a middle.
I mean, for swopping, replacing and degreeing, it would have been more helpful to have had a line, and some measured scores, e.g. 2° and 4° lines on each side of a middle.
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From: ct
When comparing cams,if you measure top of lobe to opposite end(base) ,shouldn't a higher lift cam be a little more than stock? Or am misunderstanding the term"lift".
Thought it would be taller lobe to actually lift rockers higher thus opening valve more.
My stock and ev27 close to same measurement but duration was obviously different.
Just curious.... knowledge is power....
Thought it would be taller lobe to actually lift rockers higher thus opening valve more.
My stock and ev27 close to same measurement but duration was obviously different.
Just curious.... knowledge is power....