Air Fuel Ratio Of GT-Rs

**GodziRRa** · 11-29-2011, 10:37 AM

Hello guys!

For those who have some kind of A/F gauge or monitor from AEM, Innovate, Blitz, HKS, etc. What does your A/F read at idle, cruise, and WOT? And for the gurus out there, what should be the normal A/F ratio of the RB26 at idle, cruise, and WOT?

Thanks!

**frankiman** · 11-29-2011, 11:31 AM

15 idle
12 wot

**bellis_GTR** · 11-29-2011, 05:22 PM

Originally Posted by frankiman

15 idle
12 wot

I guess you never cruise... lool

If I remember right, RB26 cruising would be in between the 12-15. Your always fluctuating the gas. Never seen that on my own, but a friends.

**Nvdgtr** · 11-29-2011, 06:06 PM

When just cruising; 12-15

when i punch it, it drops; 9-12? i cant remeber exactly.

**frankiman** · 11-29-2011, 08:14 PM

i cruise at 14,5 cuz i have steady footzor

it should never go lower than 10,5
too much full and you wash the oil off the cylinder wall, create too much heat from friction and damage ****

**kengeroo** · 11-29-2011, 09:14 PM

does anyone have pics of there AFR's logged on a map???

**frankiman** · 11-29-2011, 09:41 PM

**GodziRRa** · 11-30-2011, 07:52 AM

Nice graph bro.

Anyways, anyone knows what is the Nissan set A/F ratio on idle, cruise, and WOT for the GT-Rs?

**needavdub** · 11-30-2011, 11:26 AM

I'm about 14.6:1 at idle and similar cruising, and about 11.8-11.9:1 under full boost at WOT. Using a Innovate LC-1 wideband and running a Blitz Access tuned ECU with stock turbos @ 15 PSI.

**Skym** · 11-30-2011, 03:15 PM

The A/F ratio varies depending on what cell ECU is looking at on fuel map. The above dyno graph is the WOT run where it runs across multiple cells when going from left to right of fuel map on stock ECU.

Stock GTR = 14.7:1 is as lean as it can go at idle and 10.7:1 is richest at WOT. But idle, cruise A/F ratio is affected by o2 sensor, so might be leaner or richer at idle, cruise.