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Discussion Starter #1
I am curious what AFR you uses for the following values on a TB.com kit (GT28rs) on a stock 1zz-fe with the FIC.

My suggestion

BAR AFR
-0.7 14.7
-0.6 14.7
-0.5 14.7
-0.4 14.7
-0.3 14.7
-0.2 ???? 14
-0.1 ????13
0.0 ?????12.5
0.1 11.5
0.2 11.5
0.3 11.5
0.4 11.5
0.5 11.5
0.6 11.5
0.7 11.5 (10 PSI)

Especialy the AFR around 0.0 bar (PSI) i am curious about. In my opinion this is in a N/A situation WOT. But in case of a turbo this is about 30% throttle.

Thanks
 

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Transitional fueling is tough. 0 Bar I would actually target 12.0 for safety. -0.1 maybe 12.5

Remember NA cars are not all 14.7 all the time - there are many situations under higher load where an NA car might be tuned out to 12.0 or 12.5:1

Every car is a little different in terms of where its happy place is AF wise.
 

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Afr is also rpm dependent, its not simply just load.

For example you don't want 14.7:1 at 7,000 rpms at any load.
 

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Discussion Starter #4
thanks. so my sugestion is right??
On a turbo 1zz-fe with almost 25-30 % throttle i already reach 0.0 bar. In a N/A situation this would be WOT. I dont feel the car is going as fast as in a N/A situation.. but thats a other thing...

Is there a tabel or figure what we could use as a base for the AFR in relation to pressure and RPM?
It will help al lot of people here.

Thanks
 
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