Cam and valvetrain longevity....??? low duration high lift...
10-02-2016, 11:59 AM
#941
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Join Date: Oct 2005
Location: Olmsted Falls,Ohio Marblehead,Oh
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Damn! Wtf
I get another text from an oso guy just now.
His 540, gets a 239/246 cam. He is running GM IRON HEADS. So, whether you have 325 afrs, or 305 afrs, or GM iron heads, you pretty much get the same exhaust duration, and within a deg or two of intake duration.
Sounds awesome. I need custom cams for my tailored application.
His 540, gets a 239/246 cam. He is running GM IRON HEADS. So, whether you have 325 afrs, or 305 afrs, or GM iron heads, you pretty much get the same exhaust duration, and within a deg or two of intake duration.
Sounds awesome. I need custom cams for my tailored application.
10-02-2016, 12:03 PM
#942
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Be interesting to build a database, on these "custom" cams.
Im sure everyone had to listen to speeches about area under the curve, exhaust port efficiency, rod angles, how tall decks suck becuase of the angles, and all the other reasons they need a custom tailored cam. And what they actually get, is a common cam everyone else is getting within a hair or two.
Im sure everyone had to listen to speeches about area under the curve, exhaust port efficiency, rod angles, how tall decks suck becuase of the angles, and all the other reasons they need a custom tailored cam. And what they actually get, is a common cam everyone else is getting within a hair or two.
10-02-2016, 12:31 PM
#943
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I would like to know what you guys think of my 496s from MK. Lobe seperation 113.1 duration 237.1 / 243.5 lift 663 / 654 305 AFR heads.
10-02-2016, 12:39 PM
#945
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I was talking to MK last year about a new cam as my ZZ502 unit is less than ideal, but the ordering process felt unnecessarily complicated so I just said forget it, and then the off the shelf cam thread popped up confirming that all of that extra trouble and expense wasn't worth it for me. It seems like I may of saved myself even a lot more trouble by leaving things alone.
10-02-2016, 12:55 PM
#946
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I get another text from an oso guy just now.
His 540, gets a 239/246 cam. He is running GM IRON HEADS. So, whether you have 325 afrs, or 305 afrs, or GM iron heads, you pretty much get the same exhaust duration, and within a deg or two of intake duration.
Sounds awesome. I need custom cams for my tailored application.
His 540, gets a 239/246 cam. He is running GM IRON HEADS. So, whether you have 325 afrs, or 305 afrs, or GM iron heads, you pretty much get the same exhaust duration, and within a deg or two of intake duration.
Sounds awesome. I need custom cams for my tailored application.
Unreal. All needing this that and the other thing and hours on the phone many have spent to actually think what they were doing was time well spent to have cam tailored to their specific needs. Ah... OK. Not cool. I agree. If I had to guess valve timing events are all with a degree or two of opening and closing also. Wtf
10-02-2016, 12:59 PM
#947
Registered
Unreal. All needing this that and the other thing and hours on the phone many have spent to actually think what they were doing was time well spent to have cam tailored to their specific needs. Ah... OK. Not cool. I agree. If I had to guess valve timing events are all with a degree or two of opening and closing also. Wtf
