Cam xer vs other lobes
12-02-2010, 02:42 PM
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Cam xer vs other lobes I've seen this a couple places now and can't figure out what the different lobes mean. Ive seen comp xer lobes and such, I know theres different grinds and specs obviously but what does a cam with xer lobes mean? Searched and can't find anything specific that differentiated them.
12-02-2010, 02:55 PM
#2
I've seen this a couple places now and can't figure out what the different lobes mean. Ive seen comp xer lobes and such, I know theres different grinds and specs obviously but what does a cam with xer lobes mean? Searched and can't find anything specific that differentiated them.
The Comp XE lobes are a more mild cam lobe as fare as ramp rate and lift but there also nicer to your valve springs.
12-02-2010, 02:57 PM
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I've seen this a couple places now and can't figure out what the different lobes mean. Ive seen comp xer lobes and such, I know theres different grinds and specs obviously but what does a cam with xer lobes mean? Searched and can't find anything specific that differentiated them.
the XERs have a higher lift but the XFIs have a higher ramp rate. then theres the even more aggressive LSKs that were all the rage for about 5 minutes and now the new LSL lobes. you can mix and match to fit your combination best. the XEs a High Lift lobes are quite a bit softer.
12-02-2010, 04:27 PM
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Oh ok so it has to do with ramp rate I did nt know if it was materials the cam was made of or what thanks guys. What are these lsl lobes all about? I think my ms4 is xer
12-02-2010, 04:38 PM
#5
ramp rates. or.. how fast or slow the opening and closing of the valves are. you can do a bunch of different things with that too, fast opening slow closing, vise versa, a combination of on the int and exhaust.
the XERs have a higher lift but the XFIs have a higher ramp rate. then theres the even more aggressive LSKs that were all the rage for about 5 minutes and now the new LSL lobes. you can mix and match to fit your combination best. the XEs a High Lift lobes are quite a bit softer.
the XERs have a higher lift but the XFIs have a higher ramp rate. then theres the even more aggressive LSKs that were all the rage for about 5 minutes and now the new LSL lobes. you can mix and match to fit your combination best. the XEs a High Lift lobes are quite a bit softer.
12-02-2010, 05:23 PM
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12-04-2010, 05:19 PM
#10
Here is some good info regarding lobe profiles
Indeed. As guys have pointed out, "aggressiveness" not only varies from lobe family to family, but also between various areas of the individual lobe. That is compounded by the fact that often times not all lobes in the family exhibit equivalent velocity/accels/jerk/etc, have slightly different operating ranges, etc. That said, as has been alluded to, all of them can be made to run reliably if the rest of the VT is appropriately selected, installed, and adjusted.
Often we get questions regarding the differences between the common lobe families, and I'd actually made an XER/LSK/LSL comparison graph for one customer in the past between 3 lobes, all within 3-6deg duration.
Late to the party, but someone may glean something from it.
Good luck!
-Phil
EDIT: If the image is too large & forcing everyone to scroll, let me know & I'll edit/link it.
Often we get questions regarding the differences between the common lobe families, and I'd actually made an XER/LSK/LSL comparison graph for one customer in the past between 3 lobes, all within 3-6deg duration.
Late to the party, but someone may glean something from it.
Good luck!
-Phil
EDIT: If the image is too large & forcing everyone to scroll, let me know & I'll edit/link it.
