What determines the lopey-ness of a cam?
03-02-2005, 02:25 AM
#1
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What determines the lopey-ness of a cam? I used to figure it was mostly the LSA that determined how much a cam loped. But after hearing some of the futural cams and a few others ... the 112 really doesn't seem to have the lope i'm looking for. Do i just need to go lower? Or are there other factors that account for the distinct lopey-ness of a cam like ramp rate? a bigger differenence in I & E duration?
tia
tia
03-02-2005, 02:46 AM
#4
Overlap....
Which is the product of both duration and LSA.
A lower LSA or a higher duration will increase the overlap.
The seat timing is also something to look at on this too. A cam with a short seat timing will have less overlap and therefore less lope.
If you want more lope, you need a bigger cam in duration or a smaller LSA.
Bret
Which is the product of both duration and LSA.
A lower LSA or a higher duration will increase the overlap.
The seat timing is also something to look at on this too. A cam with a short seat timing will have less overlap and therefore less lope.
If you want more lope, you need a bigger cam in duration or a smaller LSA.
Bret
03-02-2005, 02:49 AM
#5
There have been many, many threads on this. You need to use the search button, my friend. There is a mathematical formula for calculating intake/exhaust overlap in a couple of those threads. Having a split duration doesn't change the lope much, but it does make the idle rougher. Lowering the idle speed will increase lope also.
03-02-2005, 03:18 PM
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Ramp rate will also play a role in the amount of overlap. For the same duration at .050, the cam with the most agressive ramp will have less overlap and less lope.
03-02-2005, 03:22 PM
#7
overlap plays some roll, but tr224's lope harder then the f13, quite a bit of difference there in overlap, so it has to be something other then overlap!!!! for example.. my f14 114lsa cam i full expect to lope harder then a f13 on a 112, even tho the f13 has 7 and my f14 has 5.. the f13 just doens't lope.
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03-02-2005, 03:32 PM
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