I got to 145 in my Magnym RT last Spring before I backed off. At the time I had an Airaid CAI, Magnaflow catback exhaust, and a Superchips tune of 91 octane, reduced torque management, speed limiter set to 165 mph, and paddle hold shift. I now have Frank Racing Econo Drag heads, Comp XFI-260 cam, SRT cats, SRT Magnaflow catback exhaust, Robert Shaw 170 degree t-stat, and AirHammer CAI.

 

with the overdrive on it won't go past 149 mph, in 4th gear you will get the whole 160 mph at 5500 rpms, thats what i experienced.

 

Interesting, 5th gear doesn't buy more top end speed.

Overdrive off... warp speed!

 

Question?: What is the tb spacer and how does it help with increased hp, alsowill a regular K& N airfilter be just the same as the cai ? I hear the cai brings too much heat. Lastly, At top speed with 22in rims whether alloy or chrome is that safe as if I had 20in rims.

 

177
the fastest a magnum can go.


so far.

 

i hit 180mph (on a dyno)