air or fuel, what am i running out of

rigger3006 said
had no problem spinning to 6700 in 2nd in 318, same cam and springs and cam. never knew about double spring recommendation, i thought 901s were good to about 490 lift. definitely full throttle

I am running a .508 Purple Cam with 901 single springs and I have tacked out at 7200 and did not and have not had any problems...