we run all 1/8th mile exept for maybe two races a year. (a 10k race and et finals) With 33.5's we do 140-142 mph. with 34.5's it fell off to 136-138 mph range. im not sure RPM wise what we do on the 1/8th. I'm guessing 6600-6800. I know for sure on quarter mile with 33.5's its 7100 through the traps. We shift at 7200-7400 and launch at 5600. 6000-6200 outta the convertor