Originally Posted by
BbqEazyE
MORE than likely, you will c more power as well if u get it re-tuned at 13.1
Unfortunitly this is incorrect info,
You made power up until where the mixture is currently set at. Some motors like 13:1.1 some like 13:5.1, it all depends on the engine, and what numbers the dyno generates after each adjustment. Here is some basic info pulled from Hondata's tech area to shed some light.
Originally Posted by
Hondata.com/tech
The air/fuel mixture is expressed either as the ratio of air to fuel vapor or as a lambda value. The lambda value is derived from the stoichiometric air/fuel ratio, which is the chemically correct ratio of air to fuel for complete combustion to take place. The stoichiometric ratio is 14.7:1
In general it is best to tune the mixture close to stoichiometric(14:7.1) up to moderate engine loads for engines using catalytic converters and running in closed loop. This will keep the long term mixture adjustment from altering the mixture at points in the fuel tables where the ECU is not running in closed loop.
From moderate load to atmospheric pressure the mixture can be made progressively richer for increased power, cooler running and less chance of damaging the engine. Usually the air/fuel ratio which produces maximum power is from 12.5:1 - 13.5:1, but this varies with engine type.
Your motor made power with the AFR where it was set at. From 5.6K -8.2(heavy load) the AFR is ~13:5.1. You can see in the graph the 2 areas it dips rich for safety, WOT tip in and iVtec engaugement.
In your graph above your highest blue line is 15:0.1. 14:7.1 would be slightly below that. The AFR gets no where close.
