I wish Mopar had put together a car version of the Magnum. Something that wasnt truck oriented and didnt need gobs of low end torque. Something that would pull to 5500-6000 RPM, rather than run out of breath at 4800 like they do with the stock EFI intake.
The stock intake is not to blame, its the ignition. Replace the champion plugs gapped at .035 and they will pull well past 4500. Also, you cant expect an engine with a .439 lift 114 deg center cam to pull past 5000 but if you swap out the cam with say .550 on 112 or 110 then it should pull up to 6000. The beer keg manifold has over 16" runners. Remember when John Lingenfelter was building 180 + mph vetts and camaros? His signature manifolds were 15-16" runners. Those might have been GM mills but not one you would want to screw with in a small block Dart. Longer runners make for more than atmospheric pressure at the port ie a small supercharger. The Hughes RPM airgap only does about 1500 rpm higher than the stock kegger and not as much down low. Dont know about you, but I dont typically take my V8 cars in the 6K RPM range, more power and torque at say 4800-5200. On the street, torque is king. My Audi turbo is another story though.
I would love to be there when you start that stock mag headed engine up with a .550 lift cam. It should provide some great entertainment with all the parts breakage.
I have a 94 360 mag, and a 5.7 hemi, each engine has its place.
This is photo of the mag, might throw it in my old power wagon, yes the date stamp is correct in the photo.
