im wanting to do a kinda stealth cam. i was thinking about the 224 224 with a 116LSA or something kinda like that. my question is what exactly does the Lobe seperation do? what makes the 112 different from say a 114 116. other that the lope. i know a 112 will chop more but performance wise what does it do? thanks

 

performance wise a tight lsa will create more valve overlap which causes the chopp... but it also brings the power band within a certain range say you compare the 220/220-112 it will come on stronger lower in the band and will peak faster then say a 114... the wider u go the broader the band but it also climbs slower to the peak. Another example say the 112 peaks at 6k the 114 may peek at 6500 and so forth. the wider lsa cams tend to have better idle qualities because they reduce overlap. most people with n/a run pretty tight lsa.

 

The overlap on that cam is -8, so it should be fairly stealthy. Overlap = [(intake duration + exhaust duration)/4] - LSA, so your cam is [(224+224)/4] - 116 = -8. The cam in my sig (TR220/220-112) has an overlap of -4.

LTX355 answered it well above - that the lower LSA will lower your powerband, which is better for off-idle power. It will also peak faster, which is better if you do not plan to spend much time in the >6K RPM range.

If you look at LSA's role in the overlap equation, a lower LSA number (like 114 or 112) would raise your overlap, causing more lope. The 114 LSA version of the 224/224 would have an overlap of -4, while the 112 LSA version of it would have a zero (0) overlap. Zero overlap will lope a lot harder than -8 overlap.

However, the lope is all relative at a given RPM, so by increasing your idle RPM, you can lessen the lope. Therefore, if you are trying to remain stealthy, you could go with a 114 LSA and just adjust your idle RPM up higher than you would with the 116 LSA, and have better off-idle power.

 

Well said