Cam Comparison LSL lobes vs...
Induction hardened 8660 is stronger but more brittle. When it fails, it FAILS. 8620 will have good surface hardness but a tougher core.
Honestly, either is going to be fine. I tend to prefer 8620 for the street.
Honestly, either is going to be fine. I tend to prefer 8620 for the street.
Cam Motion has truck cams as does Brian Tooley which don't require any sort of exotic valvetrain parts. Sounds like TSP has a similar lineup.
All of them are in that sub 224 duration range as well.
Somebody on here posted a Cam Motion truck cam added 41rwhp to their truck. That's a pretty good gain for a small, inexpensive mod.
All of them are in that sub 224 duration range as well.
Somebody on here posted a Cam Motion truck cam added 41rwhp to their truck. That's a pretty good gain for a small, inexpensive mod.
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They are both excellent for most LS applications if they are ground and finished properly. They both will have excellent surface hardness and wear characteristics. What is unique about 8620 is that, due to the hardening process, the 8620 cam core maintains its ductility. This allows it to live in extreme environments where an induction hardened camshaft might fracture.
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
No way would I cam any engine without doing a minimum of pushrods and at least yellow GM springs. If you cant afford those, dont cam your engine. That being said, I agree with the person that stated long tubes will do wonders. Mine really woke my 6.0 up in the mid to upper end range and really help for towing.
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Joined: Nov 2016
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From: switzerland
so you figure induction is deeper than case? and do cams need flexibility? what for?
Originally Posted by Dian
so you figure induction is deeper than case? and do cams need flexibility? what for?
Truth be told for a street machine, worrying about the camshaft alloy is a bit like majoring in the minor and minoring on the major. If that makes any sense. If you were doing super high lift and spring rates it would be more of a concern.
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Joined: Aug 2005
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From: Monroe,NY
Another great thing about the LS platform is the 55mm bearing journal camshaft design. This allows the LS camshafts to have a much thicker barrel than the old small block Chevrolet camshafts. This extra heft makes the LS camshaft much stronger. In this application, the less expensive alloys are still plenty strong for most any common application.
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Joined: Jun 2016
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From: Central Cal.
Another great thing about the LS platform is the 55mm bearing journal camshaft design. This allows the LS camshafts to have a much thicker barrel than the old small block Chevrolet camshafts. This extra heft makes the LS camshaft much stronger. In this application, the less expensive alloys are still plenty strong for most any common application.
It's not the cam core material that was the problem with Comp anywhere... nor was it the finish.
It was something much more fundamental. I am running a Comp Cam in my car. No problems. Just make sure it's Post-Jan 2016 build date for their new "tech" to make it into the cam.
It was something much more fundamental. I am running a Comp Cam in my car. No problems. Just make sure it's Post-Jan 2016 build date for their new "tech" to make it into the cam.
I know it's only one data point, but one I had was nine degrees off. Advanced. At first, I thought it was a tooth off, but moving it a tooth moved it 18 degrees, so it was half a tooth off. So, mine was a grinding error.
Well that answers my "do I really need to degree the cam" thought.
That's really retarded (couldn't help it)