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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 03-30-2008, 06:13 PM   #1
crueheadstang87
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Default LSA

is the Lobe seperation angle what determines how lopey a cam will sound at idle, The lower the lsa the more lopey?? sorry for asking stupid questions but i'm trying to gett all this stuff straight before choosing my cam.
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Old 03-30-2008, 06:37 PM   #2
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Default RE: LSA

Smaller LSA will generally make it lopier at idle, and will also tend to make more peak power in a narrower rpm range(preferable in a race car). Wider LSA tends to lope less and make less peak power, but produces power over a wider rpm range(preferable in a street car). Cam duration will also determine how lopey a cam may be, along with the intake valve closing point.

I'd advise against picking a cam just cuz it sounds mean, as that can lead to an agressive sounding peaky cam that produces craptastic bottom end power, resulting in a street car that falls on it's face. Even a good cam that makes solid, streetable power over a wide rpm range can sound decent.
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Old 03-30-2008, 07:22 PM   #3
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Default RE: LSA

Nope......it's more than that.
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Old 03-30-2008, 07:33 PM   #4
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Default RE: LSA

If its more than that how about telling us what you know Joel
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Old 03-30-2008, 07:55 PM   #5
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Default RE: LSA

It has to do with the overlap and the timing of the valve events. You can have a 114 LSA cam sound as "mean" as a 110 LSA cam....... or a 112 LSA sound "meaner" than a 110 LSA cam. For example.... B/E/X -303 cams have the same overlap at .050" lift..... but the B/Xcams sound "lopier" (if that's a word).... even though their LSA is 112, and the E-303 is 110..... but their valve events and duration are different......that's at the "cam level"..... add heads, engine CID's, etc..... and they will all sound different. Anyway, sound is a "result"... it shouldn't be a "goal"... as 67mustang302 already mentioned. I would rather have a stock sounding cam running 11's.... than a "lopey" sounding cam running 13's....... the sleeper effect.
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Old 03-30-2008, 09:05 PM   #6
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Default RE: LSA

Yeah, this is true, but nobody can dissagree with the fact that a lopey cam sounds really awesome. It could be a goal, as long as maximum power output isn't. But you can also compromise some, a cam that makes great power can be designed to sound great too.
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Old 03-31-2008, 03:47 PM   #7
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Default RE: LSA

i have a xe270hr-114 cam in my 331, stock exhaust w/ gutted cats and equal lengths, that thing sounds pretty mean for stock mufflers. its got a good lope around 600rpms, and still a tad noticible at 1k. 218intake 224 exhaust duration and .512 lift. 1800-5800rpms (advertised) at 3k it wakes up big time and pulls freakin hard till 6k, i havent gone any further yet.
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Old 03-31-2008, 08:47 PM   #8
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Default RE: LSA

94stinkinlinkin you got any videos of you car i can see?
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Old 03-31-2008, 08:50 PM   #9
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Default RE: LSA

The sound isnt the only thing i'm looking for in a cam i want it to make good power but i woiuld still prefer that it had a noticible lope to it, but i will settle for a non lopey cam if thats what will make the most power for my combo, i think i gonna call comp cams and talk to one of their techs and tell him what i have and get them to hook me up wth a custom grind i think thats gona be the best deal for me, What do you guys think?
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Old 03-31-2008, 08:50 PM
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