Best suited AFR for performance?
06-09-22, 02:24 AM
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Best suited AFR for performance?
Hi guys, I've recently installed an Apexi NEO SAFC and an AEM wideband on my 2000 LS400. I was just wanting to know if anyone knows the best AFR for performance for our engines, I've seen on various forums and videos online that in general 11.5 is best rich for torque at WOT and 12.2 is for safe best power at WOT. Currently I'm running 11.5 and it feels great but can only street tune it so don't actually know the true performance, would going leaner to say 12.4 be better?
Thanks.
My supporting mods are custom free(er) flowing exhaust and custom intake.
Any advice greatly appreciated.
Thanks.
My supporting mods are custom free(er) flowing exhaust and custom intake.
Any advice greatly appreciated.
06-09-22, 09:27 AM
#2
not many tuners of the 1UZ engine around these parts. you might be more successful with a dedicated tuning forum like ones based in Australia instead.
in my very limited experience with the SAFC, i was not aware it can alter the AFR across the entire RPM range. perhaps the NEO version can as i was only working with the 1st gen model back in the early 2000s. i would not stray too far from the stock AFR numbers since the toyota engineers tuned the ECU pretty well and the 1UZ is very sensitive to modifications, even the likes of a simple intake.
in my very limited experience with the SAFC, i was not aware it can alter the AFR across the entire RPM range. perhaps the NEO version can as i was only working with the 1st gen model back in the early 2000s. i would not stray too far from the stock AFR numbers since the toyota engineers tuned the ECU pretty well and the 1UZ is very sensitive to modifications, even the likes of a simple intake.
06-09-22, 10:25 AM
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3rd Gear
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not many tuners of the 1UZ engine around these parts. you might be more successful with a dedicated tuning forum like ones based in Australia instead.
in my very limited experience with the SAFC, i was not aware it can alter the AFR across the entire RPM range. perhaps the NEO version can as i was only working with the 1st gen model back in the early 2000s. i would not stray too far from the stock AFR numbers since the toyota engineers tuned the ECU pretty well and the 1UZ is very sensitive to modifications, even the likes of a simple intake.
in my very limited experience with the SAFC, i was not aware it can alter the AFR across the entire RPM range. perhaps the NEO version can as i was only working with the 1st gen model back in the early 2000s. i would not stray too far from the stock AFR numbers since the toyota engineers tuned the ECU pretty well and the 1UZ is very sensitive to modifications, even the likes of a simple intake.
Yeah, with the NEO you can independently set 16 RPM points for AFR changes, up to 50% -/+ each way. So you can cover the whole RPM range.
Thanks again.
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