Battery capacity

[vrooom]

I am looking to buy new shorty batteries to replace my old 4200mah turniqy batteries. I run 6.5T motor with 150A esc, with savox servo in 2wd buggy.

My car uses about 1500mah and reduces to 7.75v in 5 min heat race.

That is from 4200mah which is 8.44v fully charged. which has 65c rating.

The batteries im looking is 3250mah 90c.

my old 4200mah batteries has 273amp (4.2x65c)
new battery I'm looking at has 297amp. (3.3x90c)

will 3250mah batteries be enough for 5 min heats?

Wouldnt that pushing it bit too close ?