Jump to content

Comp Cam spec sheet help


Recommended Posts

I have an e12 head (rebuilt with only 50mi on it) with the intake port & polished. It also came with a reground cam from Comp Cams; however, I don't know how to read the cam spec sheet.

Can anyone help me out with a translation? Is this cam comparable to a 292, 300, etc? Thanks in advance.

BTW: it's not installed.


Link to comment
Share on other sites

Actually, if it's REALLY gross valve lift, and not cam lift, then it's a lot less than a 284.

But measure it. If the cam lift (lobe height -base height) comes in around 7mm,

though, it's about a 284. With a bit rougher idle, since the LSA is a skosh higher

(lobe separation angle).

To me, it looks like a gentle nudge beyond the stock cam.

Unless it really only has 7mm of valve lift, and then it looks like a


But yes, call comp cams, they know their cheeseburgers.


Link to comment
Share on other sites

  • 2 weeks later...

Just thought I'd update. I got in touch with Comp Cams, and Im still confused. This is what I was told:

"The specs on the card are accurate and that serial number is given at the top of that card. Your duration @ .050 is 199/199 with a 112 degree LSA"

If I do end up using this head, my setup from the current stock E21 head will be utilized: Single 45 DCOE w Lynx manifold, Tii Dizzy, Crane XR700, and IE shorty header.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.
With your permission we and our partners may use precise geolocation data and identification through device scanning. You may click to consent to our and our partners’ processing as described above. Alternatively you may access more detailed information and change your preferences before consenting or to refuse consenting. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. Your preferences will apply to this website only. You can change your preferences at any time by returning to this site or visit our privacy policy.