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Limit Of Standard Rb25det Air Flow Meter

Cake

By Cake,
in Engines & Forced Induction

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Cake Mentor

Cake

Posted
Posted

Looking for around 320 - 330rwhp, and currently have the standard RB25DET AFM. Just wondering whether I am going to need to upgrade to the Z32 afm. Don't want to waste $300+ if i don't need to.

So the Z32 afm is a 'higher resolution' meter. Does this just mean that it will be able to read at a higher airflow than the standard afm, or also allows for a more precise tune at all rpm?

Heard that the RB25 afm's are good for ~ 250rwkw / 340rwhp.

Any experiences, opinions, and advice is appreciated. :P

paulr33 Grand Master

paulr33

Posted
Posted

the rb25 afm begins maxing out around 190rwkw ish and keeps going until about 250rwkw. mine is maxing out around 6000rpm ish which is fine. its only a problem when it begins maxing out at like 3500rpm ish as from then onwards the load axis never increases any more so you loose some tuning accuracy.

note: this is how a map sensor car works so its OK and won't blow up or go bang. 250rwkw is fine on the stock airflow meter but it may feel a little better with a z32 as it will keep showing increasing airflow on the load axis

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