I guess I must be getting to old or cam technolagy has passed me up. I was brought up old school where piston speed, stroke, & air velocity had to be considered when selecting a cam. I am a big fan of split duration cams, I know from experience that to much exhaust duration can cause quite a bit of fuel scavenging, & typically the bigger the exhaust duration the less timing that will be ran(depending on lsa), this last 224 I installed made better power with about 8 degrees less timing. I figured out that the spark advance was occuring while I still had the exhaust valve opening.

All things being considered there is still the ramp rate, lift, & lsa to be considered when looking @ power bands. I am curious why no one has mentioned a shorter duration like 212/218 with an accelerated ramp rate & a large amount of lift say .590, this would give the benifits of both worlds, a decent amount of torque & the accelerated ramp rate along with the extra lift would make fairly decent hp numbers.

I am not an expert though... I am on my 4th cam install & just merly stating what I have noticed in my own observations...

 

You mean like my 210/218 ~.570" 112LSA?

I would be running around ~.590" if the .551" cam was available when I bought this one. (It's .531" w/ 1.7's.)

The ramp rate is accelerated via the rockers.

This cam makes torque EVERYWHERE. I'll have new track numbers April 1st.

Here is a dyno from another member's Z06 with this cam, Pats StageII heads, and the usual bolt-ons.

 

No I had the 212/218 custom grind with the ramp rates accelerated (increased lope lift rate/speed) with a 114 lsa, it made good torque all over, even with the factory convertor, as for horsepower I made 488 rwhp with it.

I know you can change the lift rate by changing the rocker arm ratio, but it can be done just as simply with the grinding of the cam.

 

That's a boatload of power...

Not really! Not with the stock rockers, at least... Just check the first paragraph in the first link.

 

Hell yeah. Only problem is, the majority of these aggressive lobes are priority to a company. In other words, they would have to design you a camshaft to get your hands on them.

Only a certain few of the x-er line is available. There are so many lobes out there, us regulars can't get our hands on.

 

There's no trick to ordering e-xr lobes.You can order a custom cam from Comp with any combination of the available x-er lobes,I'm running a 228/234 115 LS x-er cam in my truck.All you have to do is poney up the cash.But you had better do a lot of research before you pull the trigger on your order.

 

This is something that I believe Lingenfelter started doing in the LS1 motors. Some of their early "secrets" was running a fairly mild duration with a higher lift and custom rockers in the 1.8 and 1.9 ( ) range. This kept the motor "drivable" and able to make necessary vacuum, yet still have the advantages of higher lifts.

 

....also, with all of the info and dyno proven combo's that other people have tried, why not just figure out "where you want to be" power wise and go with something that has been tried and proven, rather than chance making a poor choice on your own. Before I sold the 6.0L, I asked around and did a bit of research to see what kind of power others were making with "mild" (streetable without sacrificing any drivability issues) cams and decided on the .212/.218 .557/.56x high lift version on a 114. I spoke to a few people who were running this cam and was happy with the results they were experiencing. I still really like that cam, by if I were doing it again might go a tad bigger....like in the .220 or .224 range.

 

....also, with all of the info and dyno proven combo's that other people have tried, why not just figure out "where you want to be" power wise and go with something that has been tried and proven, rather than chance making a poor choice on your own. Before I sold the 6.0L, I asked around and did a bit of research to see what kind of power others were making with "mild" (streetable without sacrificing any drivability issues) cams and decided on the .212/.218 .557/.56x high lift version on a 114. I spoke to a few people who were running this cam and was happy with the results they were experiencing. I still really like that cam, by if I were doing it again might go a tad bigger....like in the .220 or .224 range (at the most).