R-18 and lean burn

[psyshack]

OK,,, get the laughing over. Then lets talk about how to tune a R-18 ECU for a bit of lean burn action. There has to be away!!!!

Is there any system out there that will let me tune the ECU on this car. Is there anybody out there that has studied this ECU. Ive been told the R-18 was to be the next VX engine. Then hybrids came along. So honda canceled the lean burn code. Left the eco. vtec in place. Raised the compression and installed piston oilers to control knock on 87 octaine fuel.

I would really like to trim the fuel charge between 1750 rpm and 3000 rpm. Not much,,, maybe 3% to 5% in the heart of its semi atkins style valve control. IE the so called 1.5L steady state low load area of the tach.

In my daily grind going to and from work. I drive for mpg. And when Im driving for work I like to make the mileage money work for me. :) This doesn't mean I don't like like to have fun with my car. There have been a few EP3's and other Civic's that didn't like the out come of there rev. To this day Im impressed how my Civic spins both front tires when your trying to put wear on the EL400's. And thank God the EL400's are about worn out. Tis about time for some LRR tires.

I would be willing to spring for a new ECU if I had a chance at looking at the code. But I was never real good with hex and really don't even know how to get a copy of a ECU to even start hacking on. But Im willing to start if there is anybody out there that has a clue on this stuff.

Thanks
psy

[dude]

What are your Fuel Trim values at idle, 1500 and 3000rpms?

[psyshack]

Originally Posted by dude

What are your Fuel Trim values at idle, 1500 and 3000rpms?

I dont know. A sg will show you real time GPH and real time mpg. And its point blank when your in eco vtec. and very clear when your not. The 1.5L compression stroke is really miss nomer. Its still injecting a 1.8L charge. Its just holding the low load driving charge back in the intake manifold by delaying the closure of the intake valve. So fact is,,, its a delay of fuel charge.

Wouldn't it be nice to not only control the valves ,,, but also the fuel charge? Like a VX. VX only stayed in lean burn in a narrow band of the tach. Otherwise it functions like a R-18. Less the tricky dicky semi atkins head/cam.

It just seems to me. That setting up a R-18 for some light lean burn for those that want mpg... Seeing the engines roots lay in mpg design. should be easy compared to boosting the mill.

Drop the f/a mix a hair should not effect the valves, head or piston. I dont see a way one could burn a valve or slug a piston out going a shade lean in low load. If the head design is holding the intake valve open a mil sec. And pushing the standard 1.8L fuel charge back into the intake mani. for a 1.5L combustion stroke,,,,,,

Why not lean it out a hair? Fact is.. the intake valve is flooded with f/a on both sides of the valve. The charge's are cooling the head. And its not like precognition cant be dwelt with. The oil pump is spraying the bottom side of the piston and small end to cool them with the oilers. A R-18 has a 10.5:1 compression ratio on junk pump gas. Honda didn't get there with nothing.

And if folks havent looked.... the 2.0L oil burner is nothing more than a heavy duty R-18. Even shares our two stage intake of sorts. And also has a single port exhaust off the head that spins the turbo. And its a lean burn diesel. And dosent require urea to control emissions. And if the turbo folks wish to think right... They need to look at the oiler. It has a decked out block. Our R-18's are open deck with harmonic ridden cylinder sleeves.You will never beable to boost a R-18 right unless you deak the block out. But the head is game.

I want a lean burn R-18 damit!!!! Wags finger at Honda

psy

[dude]

Can you play a bit with the MAF - making the ECU think less air comes to the engine = leaner mixture.
My Long Term Fuel Trim is constantly negative at idle so I am suspecting defective fuel pressure regulator (maybe Honda put wrong batch of fuel pump assemblies) .

[psyshack]

Got ride of the Civic today. So forget this thread.

[megahurts]

Originally Posted by psyshack

Got ride of the Civic today. So forget this thread.

what did you get instead?

edit: realized you posted the topic about the mazda 3.

[RJJensen]

Originally Posted by megahurts

what did you get instead?

edit: realized you posted the topic about the mazda 3.

he got rid of it for a less fuel efficient car???? wtf??

[mO 64 StAnG 06]

Who cares.. Reading from his other thread it seem's like his Civic was a POS unfortunatley. So he traded that in and got a car that so far seem's to make him happy.

Congratulations on ur new car dude, hopefully it doesn't act up like your civic.

[qbnkiller]

Well.....picking up where he left off, I am also interested in doing the same thing. I have some experience with TunerPRO RT, and am also looking for what software is available to tweak our ECM's. Any help onthis would be greatly appreciated.

[mysticdx]

i tryed to look into it and only found that apexi has a piggy back unit for i-vtec.