Much difference in these cams?
TECH Resident
Joined: Jun 2011
Posts: 938
Likes: 473
Summit pro ls cams are 49. I have never seen lower than that in an ls cam other than the howards asa and hot cams, but they are only .525 lift, so I think that's how they are able to do that. BTRs truck cams are 50 but again I think they only go that low because they are .550 lift. Their higher lift cams I'm pretty sure are 53ish. They test on a spintron to make sure valve control is not lost with their lobes. Once they see bounce or float occurring, they scale back.
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Comp has many different LS lobes in their catalog with varying differences in lobe intensity much lower than 50* depending on design. Isky has some in the 48 range. I once saw one if the high 30s on the cam card, but it wasn't a vendor that advertises their .006" lift, so can't recall who it was.
TECH Regular
Joined: May 2023
Posts: 427
Likes: 142
From: Franconia, PA
You're referring to the difference between 0.006" lift and 0.050" lift which is a small portion of the cam lobe mostly influencing hertzian stresses on the opening side, and valve impact force on the closing side. There's a lot of lobe profile after 0.050" that plays into valvetrain stability. The intensity has very little influence.
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Comp has many different LS lobes in their catalog with varying differences in lobe intensity much lower than 50* depending on design. Isky has some in the 48 range. I once saw one if the high 30s on the cam card, but it wasn't a vendor that advertises their .006" lift, so can't recall who it was.
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Comp has many different LS lobes in their catalog with varying differences in lobe intensity much lower than 50* depending on design. Isky has some in the 48 range. I once saw one if the high 30s on the cam card, but it wasn't a vendor that advertises their .006" lift, so can't recall who it was.
