Let's talk G3 hemi cams

lowell66dart said
Let's get this thread rolling again. I ordered a cam this morning. Was leaning towards a Comp HRT but decided to stay local with Cam Motion.

GRIND# XA220/360-XA227/350-14+4
Hydraulic Roller Camshaft
Performance
Duration at .050": 220/227
114 Lobe Separation Angle
110 Intake Centerline
Lift with 1.65 Rocker Arm Ratio: .594"/.577"
Recommended Displacement: 5.7-6.1 Liter Engines
Recommended Compression Ratio: 9.0-10.8:1
Recommended Headers: Stock Manifolds to 1 3/4"
Recommended Stall Converter: Stock to 3200
Recommended Rear Axle Ratio: Stock to 3.92:1

I have my Eagles back from the machine shop. All of the valves were worn down about 20 thou on the valve stem tip so all new valves. Did a little work on the roof of the exhaust port as mentioned above and just did a general light touch up everywhere. I am going to use the 6.4 intake with SRT shorties. I also lucked onto a set of the Stainless Works cat delete pipes for half price. Cam will be 3 or 4 weeks out. I also checked with the guy who tuned my car and he had no problem with my plans.

Smart move on the 6.4 intake..
In the midst of scores of flow tests I've done on the Eagles (and pre-Eagles), is running engine combos on my dyno software.. What I've found, was that the OEM - long runner manifolds, is what made the difference in keeping the torque/HP curve under 6200 rpm while using a cam larger than 215°@050.
At any point when the runner length is shorter than 11" (manifold only - not including port length) the torque curve is affected too much to justify a short runner Intake for anything other than a drag application with a drag only camshaft.
If I'm not mistaken, OE manifolds are in the 13 - 14 inch range. The Edelbrock barrel intake is advertised at 14". Way too long in my estimation. I feel if they made them 11" or 12", it would have been in the goldilocks length for any performance street or even a race app.
I've also done a ton of flow testing on a challenger/charger Intake.
I cut it apart and really got after it. Had to, it didn't flow very good . BTW opening up the TB opening is a waste of time. The gains are on the inside. Port matching offers very little.