difference between Cam lobes?
11-24-2004, 11:51 PM
#2
Originally Posted by moregrip
after some reading I've identified several different cam lobe types that cover the majority of cams; to include:
Comp Cams(2 types)
TR
Cam Motion(FMS)
what are the differences?
Comp Cams(2 types)
TR
Cam Motion(FMS)
what are the differences?
Differences in the lobe can cover lots of things. Lift and ramp rates are the normal topics discussed when talking about lobes. Some open slower, and don't open as high like the plain comp XE. Others stay closed longer, then snap open and lift higher like the comp XE-R.
11-24-2004, 11:54 PM
#3
Originally Posted by BigTex
Comp cams has many different lobes, but only have a few listed for the LS1 engine. Common comps are the XE (.520ish), XE high lift (.560ish) and XE-R (.580ish). Comp cams also grings Thunders cams, but uses a different XE lobe so its not in their catalog as a LS1 lobe. Cam Motion is similar to comp cams. They grind Futral's cams similar to the way comp grinds thunders.
Differences in the lobe can cover lots of things. Lift and ramp rates are the normal topics discussed when talking about lobes. Some open slower, and don't open as high like the plain comp XE. Others stay closed longer, then snap open and lift higher like the comp XE-R.
Differences in the lobe can cover lots of things. Lift and ramp rates are the normal topics discussed when talking about lobes. Some open slower, and don't open as high like the plain comp XE. Others stay closed longer, then snap open and lift higher like the comp XE-R.
mostly with the ramp rates
11-25-2004, 06:57 AM
#4
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From most aggressive to least. -- xer, thunder,fms, xe
Talking with Futral, their lobes fall inbetween the Comps. Thunders do also.
That is just a standard. They all have their funky wild camshafts.
A more aggressive ramp will usually have larger specs. They can fool you too. Take a camshaft that has 205* of duration @ .05, but the lobe has a max of .590 lift.
It should have a bunch of duration in the mid-lift section.
Alot of people are led to believe the Comp 212/218 high lift, and low lift are the same. Just different lift. But that's false. You have to look outside specs @ .05
Talking with Futral, their lobes fall inbetween the Comps. Thunders do also.
That is just a standard. They all have their funky wild camshafts.
A more aggressive ramp will usually have larger specs. They can fool you too. Take a camshaft that has 205* of duration @ .05, but the lobe has a max of .590 lift.
It should have a bunch of duration in the mid-lift section.
Alot of people are led to believe the Comp 212/218 high lift, and low lift are the same. Just different lift. But that's false. You have to look outside specs @ .05
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