Im taking all this tuning stuff, step by step, and I am trying to do as much research as I can but there is just some things that dont make sense or add up. So I will begin threads specifically on what I am doing, and keep in mind, im doing this step by step so I dont mess anything up. Ive reread the boost aspects of the s4wiki and still a little confused.

Experience level: bench flashing success, homemade benchflashing harness, bootmode w/galletto + ground pins, successful galleto flash. I also have the checksum plugin for tunerpro. Thats as far as my experience goes.

Now to the good stuff......

I love the stg2 boschmaf 91 nls tune. But I want to learn why and how certain aspects of the tune can be changed, rather then just flashing it and not learning it.

So I took the.........

and also.........


and I am trying to compare them to see exactly where and how the boost was tuned to 22 rather than 19. Once I can learn that, then I will look into the differences and how he was so easily able to change from 91 to 93.

I will try to do the math myself once I learn exactly where to mess with the tune.

All in all, I would like this tune to have max boost of 19psi taper to 13 on 93 oct and all the rest of the goodies.

Thanks.

(pics below)
http://gyazo.com/3ab907d4b61fb87571d6509e071a4f28
http://gyazo.com/a8b04873d0ad15170643a22d826107a7

ldrxn usually.

ok great. So I changed these values in the LDRXN_1_A (thats what my ldrxn is named). I used the 19psi tune as a reference and just copied from that ldrxn_1_a to this 22psi tune ldrxn.

Was this done properly? Now just correct checksums? or is there another step to correct the WOT max boost?

appreciate patience.

ahhhh I see. As long as im on the right page.

at higher rpm the smaller turbos are running outside of there efficiency range and thus just blowing hot air more than anything else

ahh nice one, cheers for that. i take it if it doesnt meet required boost as your trying to push them hard it will throw a wobbly?

since this has been posted in answer to one of my questions before 

http://s4wiki.com/wiki/Tuning#Positive_deviation

LDRXN is max desired load by RPM and outputs rlmx_w. This can be further limited by other maps (KFLDHBN, LDPBN, etc...) through %LDRLMX. Finally, rlmax_w is output from %LDRLMX and is the max desired load cap for the output from KFMIRL.

rlsol_w (desired load) will be the lower value of the two, rlmax_w or the output of KFMIRL. Therefore, rlsol_w will only equal rlmx_w if KFMIRL is being capped by rlmax_w (KFMIRL is requesting more load at a given RPM and torque request than rlmax_w) and the stars have aligned and rlmx_w is not being limited at all throughout %LDRLMX. IMO the goal is to tune the maps in %LDRLMX so that they don't intervene during normal/good conditions, but are not completely disabled by raising them too high, so that they can intervene as designed when conditions change. This will give rlmax_w = rlmx_w under good conditions. Then tune KFMIRL as desired but should be just greater than rlmax_w at WOT in good conditions.

Don't put too much stock in that formula for converting load to boost. It is a decent reference, but that is it.