Just wondering if anyone has tuned a VAFC with the Stock JDM H22A, just intake and exhaust. I dont know if i/e will make a difference in AF mix, but just wondering if anyone has done it, and what results came of it. Thx.

 

Lean it out 10% across everything and set VTEC crossover to 4700 rpm.....
Brian

 

hm... i don't know about that... the best way to tune is on dyno.

 

I Agree every motor is different spring for some Dyno time

 

The ECU is going to start adjusting fuel trim anyways as soon as you make the corrections on the VAFC based on the O2 readings, so unless you reset the ECU every time it'll start modifying the fuel anyways.....
10% is perfectly fine, I can tell you that without a dyno.....heck, 10% might not even make a difference...
Setting vtec xover at 4700 is going to make the biggest difference to your butt dyno....
Brian

 

thx for the reply's , ill get to the dyno, when i actually have some more mods. Until then, ill try out some suggestions, see how they go.

 

Well this is about the 5th VAFC this week.

 

Just remember, this is completely at your own risk to do it at 10% across the board. Mine's around 3-4% and I have a 13:1 A/F ratio for most of my band (no, i'm not posting my settings). Though I also know some people who have run 45% since the ECU does detune some, and their theory is that the stock ECU can not detune more than 40%.

 

no sh_t. something is comming to mind here. i think there was an official thread made about this.... oh, here it is... https://honda-tech.com/zerothread?id=435954 who ever made that is probably pissed people dont use search.

Doug