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Old 01-28-2011, 08:38:53 PM   #1
455 Formula
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Elgin Cam Specs:

I found an Elgin E274S in storage. I thought this must have been a solid lifter version of a 327/300HP camshaft, but cannot recall. Anyone have the valve events on this????
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Old 01-29-2011, 12:47:48 PM   #2
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929 cam used in 283-400 in 60's-70's
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Old 01-29-2011, 05:34:15 PM   #3
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http://catalog.elginind.com/app/Engi...egory=Camshaft
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Old 01-29-2011, 05:48:39 PM   #4
455 Formula
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Hey, Thanks guys!!!!

Funny thing is, Elgin shows 3 different LSA's for the same camshaft!!!!!!

Just found another mystery cam in storage up on top the compressor room!!!!
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Last edited by 455 Formula : 01-29-2011 at 06:00:34 PM.
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Old 01-30-2011, 03:09:47 PM   #5
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The specs for this cam are all over the place...

The most consistent specifications I have found indicate 258°/269° SAE, 194°203° @ .050" and valve events of IO @ 10° BTDC - IC @ 52° ABDC - EO @ 68°BBDC - EC @ 6° ATDC.

However, the same chart shows the camshaft havingf 90° of overlap and shows the installed position of the camshaft with the intake at 110° and the exhaust at 122° respectively.

When I plug the numbers into my cam program, assuming a 112° with the ICL @ 110°, I get events at .050" of IO @ -12.5° BTDC - IC @ 27.5° ABDC - EO @ 35.0° BBDC - EC -13.0° ATDC and MINUS 25.5° of overlap!!!!!

This just isn't adding up in my head.

Any thoughts????
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Last edited by 455 Formula : 01-30-2011 at 03:15:43 PM.
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Old 01-30-2011, 03:56:06 PM   #6
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With only .398"/.420" lift, could we run 1.6 rockers on this without cutting the slots????
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Old 01-30-2011, 04:55:52 PM   #7
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Probably not even though it is a low lift / duration cam

1.6 rockers move the pushrod closer to the inside of the slot/ hole and rub against the casting
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Old 01-30-2011, 04:58:18 PM   #8
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Yeah...I hate to grind on the heads as they are fully assembled...
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Old 01-30-2011, 04:59:54 PM   #9
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Just get a couple of Louis Tools and some sharp Cobalt bits, lube them up well then cover the engine valley with some towels and use a shop vac while you drill and you should be fine.
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Old 01-30-2011, 06:11:29 PM   #10
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Hmmm....how much lift would we gain???
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Old 01-30-2011, 06:15:09 PM   #11
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Quote:
Originally Posted by 455 Formula
Hmmm....how much lift would we gain???
.027" and .028" more lift (intake/exhaust)
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