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Discussion Starter #6
this baby is 1.170" base circle intake and 1.207" exhaust
lobes are 281/299 @ .050"
duration at .200" and .300" = forget about it , its insane
duration at .500" lift ... still got 26 degrees there on the intake
 

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Butch
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this baby is 1.170" base circle intake and 1.207" exhaust
lobes are 281/299 @ .050"
duration at .200" and .300" = forget about it , its insane
duration at .500" lift ... still got 26 degrees there on the intake
What is it at .200" and .300"?

Are they all on 8620 cores, or 8660 your using?
 

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Discussion Starter #8
cant spill the beans completely , imagine 26 degrees at .500" lift and work down .
 

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Danny,,,is that like a HY lift 'DWELL' type lobe........lol

could that lobe be cut on a 50MM roller SBC core???
 

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Discussion Starter #10
55mm is min. bearing size for this .507"/ .497" lobe set. i have SB2 cams with this at 55mm for standard block / sb2 head layout. rare set up to find.
 

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Butch
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cant spill the beans completely , imagine 26 degrees at .500" lift and work down .
So what your getting at is its like the Crane .4467" lobes but for much larger 55mm cores, mild to moderate seat and tons of high lift lobe area.

What are you on the seat @.020" about 304°?
 

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Discussion Starter #12
316 / 336 at .020"
200/208 @ .200"
we have run 2.0 rocker ratio on this intake lobe... 1.014" intake valve lift
 

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Butch
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316 / 336 at .020"
200/208 @ .200"
we have run 2.0 rocker ratio on this intake lobe... 1.014" intake valve lift
Its close to this lobe in appearance, not sure what your split is for the duration though

311 @.020"
282 @.050"
209 @.200"

317 @.020"
288 @.050"
213 @.200"

^^^ 55mm and 60mm

Amazing thing is, with that large core, they are not as violent as it may appear, I assume yours is the same on the larger core.
 

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These are Erson's .510" lobes (as I don't have any listed .200" dur. #'s for the .500" lobe family):

312/336 @.020"
282/300 @.050"
206/217 @.200"
 

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Discussion Starter #15
its a pro level combination for sure , the whole engine is built around this camshaft . a guy usually has to buy the block and heads to go with it or its never gonna fly.
 
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