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Ideal Afr?

gt-ahhh!

By gt-ahhh!,
in Engines & Forced Induction

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W0rp3D Grand Master

W0rp3D

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Posted (edited)

Thought i would post in this topic instead of starting a new one, got a dyno run done today, just wondering if my afr's are too rich as they drop off to 11 as i hit 14psi then climb back up to 12 as the boost drops to 13psi.

How much power would you like?

If under 300hp(220kw) you need fuel pump and evc or boost guage for check boost.

If you want to power over 300hp you need Z32 AFM befor remap.

Since i am making 223rwkw im guessing im maxing out the standard afm, also still running the standard injectors, ecu and fuel pump, obviously not running out of fuel tho.

post-27276-1225712511_thumb.jpg

Edited by W0rp3D
gt-ahhh! Proficient

gt-ahhh!

Posted
  • Author
Posted
Thought i would post in this topic instead of starting a new one, got a dyno run done today, just wondering if my afr's are too rich as they drop off to 11 as i hit 14psi then climb back up to 12 as the boost drops to 13psi.

Since i am making 223rwkw im guessing im maxing out the standard afm, also still running the standard injectors, ecu and fuel pump, obviously not running out of fuel tho.

post-27276-1225712511_thumb.jpg

i think my ecu is tuned for about 11.5-11.7. you can go a little leaner but its not really worth it in a street car, and im running a fair bit of ignition advance.

11 is a tad rich, but its better to be rich than lean! 223rwkw is quite impressive assuming youre using an RB25 in a gtst (i forgot to check this). you should consider upgrading your fuel pump at the very least. injectors are fine up to about 240rwkw i am told. z32 afm is recommended if you want anymore power. i can refer you to a bloke who does standard ecu remaps for about $650-700. i found it was well worth it, good power and response gains.

W0rp3D Grand Master

W0rp3D

Posted
Posted
i think my ecu is tuned for about 11.5-11.7. you can go a little leaner but its not really worth it in a street car, and im running a fair bit of ignition advance.

11 is a tad rich, but its better to be rich than lean! 223rwkw is quite impressive assuming youre using an RB25 in a gtst (i forgot to check this). you should consider upgrading your fuel pump at the very least. injectors are fine up to about 240rwkw i am told. z32 afm is recommended if you want anymore power. i can refer you to a bloke who does standard ecu remaps for about $650-700. i found it was well worth it, good power and response gains.

Yeah is an r33 rb25det, i have a set of injectors, z32 afm and power fc for it, gotta get the injectors cleaned and checked before i put them in, was told there 650cc but cant find any info on them, still have to get a new fuel pump then i will get it all tuned, the turbo i have is only good for about 250rwkw so theres not much left in this set up.

gt-ahhh! Proficient

gt-ahhh!

Posted
  • Author
Posted
Yeah is an r33 rb25det, i have a set of injectors, z32 afm and power fc for it, gotta get the injectors cleaned and checked before i put them in, was told there 650cc but cant find any info on them, still have to get a new fuel pump then i will get it all tuned, the turbo i have is only good for about 250rwkw so theres not much left in this set up.

650cc is pretty big. but yeh 250rwkw is pushing the stock motor anyway. its pretty serious power in a rwd.

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