Originally Posted by fast68plymouth
What rpm is 24” tuned to on your combo?


This has shown to be pretty close if the csa is close to correct from my dyno time. there are 3 pulses that can be used,
Bowling's Intake Runner Computator
Computation Results:
Input length is 24 inches
For 2nd harmonic, RPM range is from 4895 to 5940 with a pulse strength of 10 percent
For 3rd harmonic, RPM range is from 3678 to 4203 with a pulse strength of 7 percent
For 4th harmonic, RPM range is from 2867 to 3207 with a pulse strength of 4 percent

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5