I agree with Andy and Cab. I use the Performer RPM dual plane on my 451 stroker (around 530 hp) going through the traps at 5.600 rpm at high elevens in a 4.000 lbs Charger with 4.10:1 gears and a 10" converter on regular (i.e. non-softcompound tires) Firestone Firehawks. Before that I used the TM7 on the same combo;it was decent but not as good as the Performer RPM.

Ragnar in Iceland

Last edited by BadMoonRacer; 02/03/16 05:02 PM.
66 Charger, 451, .582" lift, 11" conv. 4.10:1. 4118 lbs 11.75@117 mph on regular Firestone Firehawk radials.
Icelandic Champion in MC 2007, 2008, 2009 and 2022.