hey guys,
my car (R32 RB20DET) is about to get tuned (remap) and i'm still in doubt that i really need to upgrade to a Z32 air flow meter before i go ahead with it.
i'm aiming between 220-240rwkw with a TR43, injectors and the other usual mods. this will be at high boost levels. the RB20/RB25-s1 and the Z32 air flow meters are both 80mm. the only difference is the higher calibration.
my mechanics drift car has a reliable 260rwkw at the wheels on an RB25 with a standard series 1 (same as the RB20DET) air flow meter. it cops a beating all day on the track and has been fine since.
i have heard 2 main analogies:
1: the only difference between a standard sized afm and a Z32 afm is that the Z32 can be tuned in a finer and progressing manner higher in the rev/boost range.
2: the standard afm's max out at certain airflow levels and a Z32 is needed.
does anyone have proof (not heresay) that i actually need a Z32 afm to chase up to 250rwkw?
don't reply if you don't know from experience or theory, i'm after technical responses.
i would really appreciate opinions/responses from tuners.
cheers,
dave.