Has anyone tried "tricking" the sepst by say adding a stage2 map with only a stage1 upgrade to allow enough fuel to get to the more power afr?

 

Hmmm, now you've got me thinking, since the bikes are so lean and run so hot stock, you would assume loading a Stage 1 map (which compensates for a free flowing exhaust and intake by adding more fuel) kind of solve the lean/heat issue? I too would be interested in hearing if anyone has done that.

Jim

 

I am gonna try it just to see because as of now with high flow slip ons and a hi flow air cleaner along with the stage 1 remap I can't tell a difference except my wallet is lighter. if it seems to be jacking something up I can change it back to my saved stage1 map.

 

HD use to do that when they just did a download for a stage 1 or 2. The would download the stage 2 map on a stage 1. And some times do a stage 1 on a bike with No mods.

 

The stage 2 might change the timing to allow for cam upgrades so save your working timing tables.

 

With the amount of closed loop cells in the target AFR table. The trims will just bring it back to the target. If you want more fuel. Change the target table.

Here is something about fuel. Stoichiometric means that all fuel is burned. If all the fuel is burned and none is left over. You got as much BTU's out of the fuel that you can. Adding more fuel is not going to create more power. The same amount is going to be burned and that means you just have left over unburnt fuel. This extra fuel that is targeted at higher load settings is for thermal management and not because it creates more power. Where power can be discovered is mechanical leverage done by timing. So, adding a timing table that isn't set up for the cam isn't a great idea to bring out more power either.

 

True, change the target table. But an afr of 14.7:1 is not for max power but max mpg. Max power is made from 12.8 - 13.2:1.
Once I'm tuned and my VEs dialed in, I'll run open loop. I won't run 14.7 anywhere. 13.8 is the leanest I'll run at cruise. I could give a $h!+ about mpg.

 

Why is 12.8-13.2 targeted for max power?

 

Just because it burns all the fuel at 14.7 doesn't mean it wouldn't burn more if it had it to burn. All the research I have read says the 14.7.1 is excellent economy and epa friendliest but for power and better runability a richer mix is key...

 

Stoichiometric means all available oxygen is burned. Fuel doesn't burn with out oxygen. Add all the fuel you want. With out more oxygen. You aren't burning any more fuel. Simple 5th grade science. What are the 3 things needed for fire. Spark, fuel and oxygen. Take away or run out of any one of the 3 and no fire.

Please don't confuse this as me saying 12.8-13.2 isn't what needs to be targeted at higher loads or WOT. I am stating that the power being produced isn't because the extra fuel is being burned. It is because the extra fuel is having a cooling affect. One big thing this cooling affects. Ignition advancement that we can now allow because we are controlling this heat.

Fuel = thermal management
Ignition = control over mechanical leverage