Getting the most out of lean burn (Honda)

[greasemonkee]

That vid ^ is the all stock setup.

The fuel controller intercepts the MAP signal, APEXI website has PDF manuals for all models.

On my work route the average had been approx 56.3 now 58.3 is the norm for non-rush days, this is with 195-50-15 ultra performance tires and eggbeater wheels. This is mostly interstate and over mountainous, fuel sucking terrain - 2000' drop in a 3 minute period.

[ever_green]

^

[turbovr41991]

Has anyone ever listed out the lean burn differences between the VX, HX, and insight? From what I can tell with the HX, I can have lean burn all the way to 3,100 rpm.

On a personal side, I struggle to engage lean burn if I am not around 2400 - 2500 rpm, under 20% throttle, under 70 LOD, and on a warm engine. Are these 4 factors what limit lean burn?

I am really interested in this work. I know there are also alot of HX and insight owners that would could benifit from this!

[1carnut]

I have both a VX and an HX and there is a big difference in Lean Burn between the two. I would really like it if I could get the HX to behave more like the VX for starters and then ideally apply these changes as well. I have tried to read up here on LB and have had some dialogue with Brucepick who yielded some good information and the Marvel Mystery Oil tip. I've only been driving the HX for a short time but the HX seems to limit LB engagement until it's above about 1900 rpms where the VX did not. It also will not engage sometimes after it is warm under the same conditions that it normally would and I find that I have to run the speed/rpm's up really high (~70mph) and then it will engage again but only stay in LB down to about 65 mph. I'm looking for any additional useful information or suggestions.

[Formula413]

Lean burn can be finicky in my HCH. If I drive 60mph I can maintain it indefinitely as long as there is no significant grade. But at 65mph it almost never uses lean burn. If I were to gently accelerate from 60 to 65 it will stay in lean burn, but once it's pushed out it won't go back in. The Scangauge is very helpful in maintaining lean burn. I find that as long as I keep engine load under 90 it will stay in lean burn, and if it gets forced out I can usually resume lean burn by dropping the TPS under 20.

[MetroMPG]

Originally Posted by WD40

Question tho .. why no gas log for your car

Seconded!

Interesting work on this project.

[wyatta4]

Nice! This is definitely some impressive work..

[Cobb]

Alright, lets see how long the motor lasts. I had a supercharged tacoma with the v6 and trd charger. This was before they added the 7th injector. I was doing between 15-17 to 1 ratios and once at a dyno pull they stopped it claiming I had seriously fuel issues and needed to get it checked or a piggy back system.

[turbovr41991]

Originally Posted by Cobb

Alright, lets see how long the motor lasts. I had a supercharged tacoma with the v6 and trd charger. This was before they added the 7th injector. I was doing between 15-17 to 1 ratios and once at a dyno pull they stopped it claiming I had seriously fuel issues and needed to get it checked or a piggy back system.

There is a big difference between ruing boost at higher RPM and increasing lean burn on an NA car at idle...

[Mcbroiler]

I ran my high mileage (200k plus pontiac vibe) in lean burn all the time with my supercharger and it lasted about 25k miles..probably woulda of lasted alot longer if i hadnt went to a smaller pulley and kept my foot outta the pedal. Oh and i also was using water injection for anything over 6-7 psi...Long story short if your running low boost no more then .5 bar, then you should be able to run lean for short periods with out any negative effects.

The car manufactures are owned by the government and the government is owned by the oil companies. Any questions?