Your friend may need to work on the chassis and drivetrain to make the car faster with the motor the way it is, what do the time slips and spark plugs look like?
On the BSFC it looks a little rich, especially above 5000 RPM, maybe try leaning it down a smidge to see if the MPH picks up or not work
If it does and the 60 ft. get worst then traction maybe limiting the cars times shruggy
Torque converters in a race car can really hold the car back, compare his time slips to other similar cars at the track during the same time frame to see if that will help or not scope
I've also seen fuel delivery systems limit cars that the owners didn't thank it was, can you fatten the jetting up enough to slow the 1/4 MPH down? If not fix that next twocents
How heavy is the car and what is it running ET and MPH on what length tracks?

Last edited by Cab_Burge; 01/05/20 02:28 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)