BLACK'98DSM
Moderator
- 5,452
- 2,955
- Feb 9, 2019
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Alabama
I'm not really expecting to get an answer since 420a gurus aren't around anymore, but I'll do this anyway.
So I've acquired a few sets of 420a cams. Bought them up while they were all around $400 for a set (some are discontinued completely now while others start at $580). I've already decided I'm going to use some Crowers in my current build.
What's happening is I'm running into some disagreement with the specs of the stock cams, and even new cams. I've been using the stock specs as a reference to see how different each cam grind is in comparison. But those specs can vary depending where you get them from. So I'm wondering where these cam manufacturers are getting their specs from? Were they attempting to measure out a set of stock cams or contacting Mopar?
Here's the listed specs from Crower:
Here's the listed stock specs from Crane:
Not only are those values not lining up with each other, but based on Crane's listed specs the stock cams have more duration than a set of stage 1 cams. Which nobody uses those anyway, but it doesn't make sense.
To add on, here's another issue I ran into. I have an extra set of Crower 64461-2 cams. The specs for these cams on their website are as follows:
Here's the specs sheet included with the cams:
It looks like all of the values line up as advertised besides the duration. Surely it isn't a typo of 2 lines right? Well I sent an email to Crower asking if their specifications for this specific set of cams has ever changed, thinking I might have picked up an older set, but they returned negative on that.
So yea I have a jumbled mess of camshaft information here
. At the end of all this mess it doesn't impact me directly because I know the cams I'll be running are significantly better than stock. But selling either of my sets of stage 1 cams will be hard when one set is supposedly worse than the stock ones and when the other set isn't exactly as the website describes.
So I've acquired a few sets of 420a cams. Bought them up while they were all around $400 for a set (some are discontinued completely now while others start at $580). I've already decided I'm going to use some Crowers in my current build.
What's happening is I'm running into some disagreement with the specs of the stock cams, and even new cams. I've been using the stock specs as a reference to see how different each cam grind is in comparison. But those specs can vary depending where you get them from. So I'm wondering where these cam manufacturers are getting their specs from? Were they attempting to measure out a set of stock cams or contacting Mopar?
Here's the listed specs from Crower:
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Here's the listed stock specs from Crane:
You must be logged in to view this image or video.
Not only are those values not lining up with each other, but based on Crane's listed specs the stock cams have more duration than a set of stage 1 cams. Which nobody uses those anyway, but it doesn't make sense.
To add on, here's another issue I ran into. I have an extra set of Crower 64461-2 cams. The specs for these cams on their website are as follows:
You must be logged in to view this image or video.
Here's the specs sheet included with the cams:
You must be logged in to view this image or video.
It looks like all of the values line up as advertised besides the duration. Surely it isn't a typo of 2 lines right? Well I sent an email to Crower asking if their specifications for this specific set of cams has ever changed, thinking I might have picked up an older set, but they returned negative on that.
So yea I have a jumbled mess of camshaft information here
. At the end of all this mess it doesn't impact me directly because I know the cams I'll be running are significantly better than stock. But selling either of my sets of stage 1 cams will be hard when one set is supposedly worse than the stock ones and when the other set isn't exactly as the website describes.
