whats the ideal AFR for B16A for power ?

is 12.8:1 - 13.2:1 ?

my compression is :

cylinder 4 - 11.5
cylinder 3 - 12.5
cylinder 2 - 11.5
cylinder 1 - 12.5

 

 

your compression is awful... like, pretty sure you have some bad rings, ring lands, or a leaking head. your AFRs are not actually going to be accurate with an 8% variation per stroke. You should sincerely consider an overhaul before you bother tuning.

But I would go about 0.4 richer in the last 4 columns regardless.
If you graph it and find it makes more power leaner, that's great, but especially with how wonky your compression is I doubt it would make any gains.
At this point you're just trying to avoid detonation.

 

English isn't my native language.... whats that ?

 

Something is wrong, those compression numbers don't make any sense. What units are you using?

 

stock b16a1 engine , 300.000 km

 

What unit of pressure is your compression test? BAR? kg/cm2?

 

dont know it was not me who did it

 

yeah those compression values really don't make sense, it's almost impossible to have those values be so perfectly inconsistent like that

 

what are the standard values, and what unit ?

 

Gotta be in Bar. 12 Bar = about 176 psi

11.5 bar = about 162 psi.
The engine doesn't have great compression numbers but there not super horrible either. Depending who and how they did the compression test, the numbers May not be 100% either.

 

Standard…………………… 187 psi
Minimum…………………… 135 psi
Max. variation…………… 28 psi

is this right ?

 

That is correct