And...how much ignition advance do they run at 20k to help the flame front stay up with the piston speed???? Top Fuel engines run as much as 65 degrees to enable 9000 RPM. It's not just VE. Skip At 11:34 AM 4/30/2008, Dave Dahlgren wrote: >Actually Cosworth is over 20k rpm in qualifying trim..LOL 19k is in >'endurance trim' LOL >Dave