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easy cam lift math Q
#2880428
01/26/21 02:24 PM
01/26/21 02:24 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
OP
Circle Track
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OP
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I'm assuming that a .488/.480 listed cam, that this is with 1.5 rockers & with 1.6 mag rockers that I need to some slight math to get a true number? Thank you for your time.
live every 24 hour block of time like it's your last day on earth
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Re: easy cam lift math Q
[Re: RapidRobert]
#2880453
01/26/21 03:20 PM
01/26/21 03:20 PM
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Joined: Mar 2011
Posts: 3,069
Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,069
Michigan
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I'm assuming that a .488/.480 listed cam, that this is with 1.5 rockers & with 1.6 mag rockers that I need to some slight math to get a true number? Thank you for your time. Divide the listed lift by current rocker ratio then multiply by the new ratio.
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Re: easy cam lift math Q
[Re: LaRoy Engines]
#2880554
01/26/21 06:17 PM
01/26/21 06:17 PM
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Joined: Mar 2011
Posts: 3,069
Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,069
Michigan
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I think I would rather multiply the lobe lift by the rocker arm ratio. Some Magnum cams are listing their lift with a 1.6 rocker ratio.. That’s not what the OP asked. Obviously the best method to determine valve lift is to measure it. And forget what’s in between the camshaft and valves.
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Re: easy cam lift math Q
[Re: A727Tflite]
#2880579
01/26/21 06:57 PM
01/26/21 06:57 PM
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Joined: Aug 2007
Posts: 6,095
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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I'm assuming that a .488/.480 listed cam, that this is with 1.5 rockers & with 1.6 mag rockers that I need to some slight math to get a true number? Thank you for your time. Divide the listed lift by current rocker ratio then multiply by the new ratio. Or simply multiply the actual lift by 1.0666667 ( which is the same, but on a single operation ) If want to know with 1.7 rockers, the multiplier factor would be 1.13333333
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: easy cam lift math Q
[Re: A727Tflite]
#2880782
01/27/21 08:38 AM
01/27/21 08:38 AM
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Joined: May 2019
Posts: 6,221
nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,221
nowhere
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I think I would rather multiply the lobe lift by the rocker arm ratio. Some Magnum cams are listing their lift with a 1.6 rocker ratio.. That’s not what the OP asked. Obviously the best method to determine valve lift is to measure it. And forget what’s in between the camshaft and valves. Well technically the OP asked about cam lift, not valve lift, which is the same regardless. Yeah, we're pretty sure he meant valve lift but if you want to split hairs about it...
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Re: easy cam lift math Q
[Re: Sniper]
#2880836
01/27/21 11:37 AM
01/27/21 11:37 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
OP
Circle Track
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OP
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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actually whats going on is I was considering an ebay set of iron EQ's (class rules) & the guy gave his # & said he could put whatever springs in that a buyer wanted along with brass guides (liners?) so I wanted to figure the valve lift of my intended cam so I could have him select the right ones but when I spoke with him all sounded good except he wanted me to pay him direct so that he could get out from under the ebay fee. I'm not comfortable with that. still undecided. I agree with him that these heads are getting real scarce until the next batch of 100 (his number) is made over there in new zealand & made available but 2K is alot to risk if he ain't on the up & up. if he wants to get over on them he might want to get over on me.
live every 24 hour block of time like it's your last day on earth
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one of the many reasons I call them motors Hemiroid motors 
that'll stop any BS