Any cam gurus here? can you tell from a lobe, what it is? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 02-19-2008, 05:26 PM
F&J F&J is offline
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Dude, you can get a cam for ANYTHING.
Show me ... honestly, I did google a while back and could not find one supplier. One site had "custom" services "available"...but no hints as to what how long or how much.
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Old 02-19-2008, 05:30 PM
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I would start calling cam companies then. Isky, Engle etc.
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Old 02-19-2008, 07:11 PM
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Originally Posted by F&J
Ok, I'll have to borrow a dial indicator that has more capacity. my bud works for Pratt & Whitney .

Then I will see if I can get the cam in the lathe centers and have room for the wheel...then I'll get back with some findings.
Thanks!
It doesn't need to be that fancy, I've cut V blocks out of aluminum or wood and set the degree wheel off the edge of the table for spin clearance...

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Originally Posted by ap72
I made a degree wheel out of some super dense paper board and a compass. The thing's like 2 feet in diameter which sure beats the hell out of trying to use one of those 8" deals. Plus it only set me back a few bucks.

It did take almost two hours to set every tick mark on it though...
One time I needed a degree wheel and so I bought one of those little plastic protractors...I made 2 copies of it on the copy machine at the drugstore using the zoom feature , glued them to a piece of poster board so both halves together were showing 360 and the circles were aligned..


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Old 02-27-2008, 11:11 AM
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Ok, I just got the cam 10 minutes ago by UPS

This thing is OLD..there is no zip code on the Crower info, that makes it pre-1965? Plus there used to be a 2 digit number used for bigger cities before Zips came out, and there is none on this. I can't read the old postage sticker on the Crower box, but it was addressed to Pacers Auto???

Anyways. I just called my machinist friend and he's bringing over the indicator, a degree wheel and is looking for another V-block. I'll have all this set up pretty soon, so I need some teaching here Where do I start?? Thanks... I'm all giddy like a chick with a new pair of shoes

Plus the UPS driver wants to come back and look at the old chevy truck I just put out by the road for sale.
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Old 02-27-2008, 01:14 PM
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So far we have roughly 318 lift at the lobe. Now we don't know for sure if this is an early 303 cu in Olds cam that was 1.5 ratio, or a 56-58 cam for the 1.8 ratio. So, if it was a 303 cam, that would be .477 lift at valve...vs, a 1.8 ratio later cam with 572 lift at valve??? So, can I assume it is an early cam? or did they actually run 570 valve lift on drag cams?
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Old 02-27-2008, 01:41 PM
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Call Joe Mondello. If he doesn't know what it fits, there's no hope. He is "Mr. Oldsmobile".
http://www.mondellotwister.com/contact.html
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Old 02-27-2008, 01:51 PM
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49-51 olds could use 1.8 rockers. did that to give a better lift on the early olds for the street.
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Old 02-27-2008, 07:43 PM
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I did check the duration the way Mikey said; with checking from .004 after base to .004 before the base, and I ended up with approx 272* duration.

But I am stuck on how to tell if it is a Hyd or Solid cam by using the indicator & wheel??? Any thoughts? What is "lash ramp" that was posted earlier?
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Old 02-27-2008, 08:11 PM
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Here's an interesting thread on the HAMB.......
http://www.jalopyjournal.com/forum/a.../t-133603.html
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Old 02-27-2008, 08:40 PM
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Ok, I read that, plus a ton more on google about ramps. But I need to know how to measure or see the ramp, or if there is no ramp. From what I gather, the ramp on a solid just takes up the lash, so it can't be much?

My friend says solid cams seem more pointy than hyds???

I'm lost
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Old 02-27-2008, 09:28 PM
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what was available in those engines factory solid or hyd? being that old there is a good chance solid is all that were offered.
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Old 02-28-2008, 05:45 AM
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olds did not offer solid cams until 57. I ran engle solid cams with gotha adj rockers.
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Old 02-28-2008, 06:17 AM
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I would talk to Charles at Camcraft Cams

He still lists a 324 Olds cam in his catalog. It's listed under antique cams.

www.camcraftcams.com
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Old 02-28-2008, 06:33 AM
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I just looked at those now. That is the 56-up cam. My engine uses a 49-55 cam. The difference is the journal size went bigger in 56.

From all the searches last night, a 49-55 cam "supposed" to have the same journal size as a common small block chevy....and I can't even find the chevy journal size listed on any search My new cam is 1.875 journal. Anybody know what a SBC is??

If not, I will go see a guy I know at Advance Auto. He should be able to look up the SBC size, PLUS he is a 40-plus year drag racer that also owned his own race engine shop for 20 years. Maybe he can help determine if this cam is solid or hyd. Thanks
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Old 02-28-2008, 07:18 AM
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I just did an advanced google search for SBC cam journal sizes and got to the Crower PDF. They show 1.868 for SBC stock.

More interesting is one of the many groups of Crower HYD cams for SBCs, shows a 3 digit number followed by an H on the chart under "cam lobe". My cam is an old Crower with a 2 digit followed by an H. Getting closer, I hope...off to see the engine guy now.
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