Quik

iTrader: (7)

also depends on the lobes its grinded on. from what i understand you can have two similar cams as for .5 lift but its the other lifts that make the difference

Rhino79

iTrader: (7)

Exactly, people need to start taking the valve events into consideration, different setups need events.

1slow01Z71

iTrader: (36)

Here is a visual comparison how how lobe design can effect the power band here is my old Lunati 237/242 .595 .595 112

Here is my old Jones Cam Design 246/246 .620 .620 112

See how the Lunati lobes are straighter on the sides going up to the peak of the lobe and how the Jones cam is more "rounded" the rounded lobe will give you more flow at lower duration due to the "larger" lobe at a given duration. This cam will give you the power "under-the-curve" that more aggressive lobe can give you such as the comp LSK lobes.

RandomHero

iTrader: (24)

I don't think anybody is doubting that different lobes/grinds can make a big difference as well. The issue I'm speaking about is why people thing that "extra lift is extra power" on a stock head. Anything over .550 is basically useless.

1slow01Z71

iTrader: (36)

According to these they dont stop flowing at 550
http://ourworld.cs.com/jrp98ls1/stockheadflow.jpg
http://smokemup.com/tech/ls1.php
An aggressive lobe with decent lift can net some very good gains over some of the less aggressive grinds. And again its not lift so much as valve events that will net the bigger gains, running a larger duration cam with soem advance ground into it will shfit the power band down and net some good gains thoughout the power band.

RandomHero

iTrader: (24)

Yea it does. from .450 to .650 the heads flowed 6 cfm better. Are you saying a 6 cfm change is going to produce more than 2-3 rwhp(if that).

Now they actually do flow a bit better on the exhaust side between .500 and .600, but still only 9 cfm which isn't going to make much of a difference

Also, Cody, that's the exact same flow chart I posted

1slow01Z71

iTrader: (36)

I agree using that area is harder on the valvetrain but if its there and not at an astronomical lift why not use it. Its not like 600 is so hard on valvesprings, not to mention if you are running a good dual spring like you should you should see many miles of use out of the springs. Many guys on tech are running 600+ lift on patriot dual golds and shifting close to 7K and have 30K plus on their springs. Any way you look at it you have to pay to play and replacing valvesprings becomes a maintenance item on a hi-performance machine. This is all just my opinion and some people are willing to work on their trucks more then others. What do I know Im running a .565 lift cam on some heads that flow 330 at 600. Here is the flow chart for my WCCH edelbrock 245s http://www.proheads.com/WCCH245.html I may try another cam with higher lift later on just for ***** and grins and I get bored easily

RandomHero

iTrader: (24)

I know exactly what you're saying, but we're just shooting the **** at this point. It's just a friendly talk about all this stuff.

My point was that scientifically there isn't really a point in using a cam with .600 over using one with .550(or even .525 for that matter). That doesn't mean you can't buy a .600 but there's just not much point. That doesn't mean that a big cam is pointless. Hell I run a 224/224 in my 5.3L which is pretty much pointless.

Quik

iTrader: (7)

then explain this if there is no point..........how can a ms4 gain you a proven 60hp with nothing more as in mods. 5.3s and ls1s flow the same. so anything over 550 lift is pointless then explain why a ms4 can make 60rwhp and where as a ls6 cam makes like 15rwhp gain

its not always about flow, its the whole package. take a look at the L92s for example what they flow and what lift isnt similar at all to a ls6 head same lift cam

moregrip

iTrader: (8)

a lobe will make more power with greater lift because it will spend more total time open at it's highest flowrate. Example: my heads max flow occurs @ .575 lift, however my intake lobe is spec'd @ .600 lift.