Anyone use kpro toget better mpg?

[dann_04]

Sorry, but couldn't find anything in the search. Just wondering if anyone stock or close to stock have gotten kpro and used it to lean out the engine a little to get better mpg(safely) and if so what kind of numbers are you getting? Otherwise anyone elsewho wants to chime in with their own before/after numbers feel free. I'm thinkingabout getting it, just don't want to sacrifice mpg in the low end to gain power at the top. Thanks.

[Blaine]

Its a catch 22 more hp = more fuel burned...better fuel economy = less hp

but im sure you could use kpro to increase your mpg but you would most likely lose some hp

[ALL MotoR Ep3]

yea u can use kpro to get better fuel mileage but you have to know what you are doing...so you should start reading on how to tune..so you could save your money and do it yourself cause tuning is expensive

[4angrybadgers]

Its a catch 22 more hp = more fuel burned...better fuel economy = less hp

but im sure you could use kpro to increase your mpg but you would most likely lose some hp

Not necessarily. The cam, fuel, and ignition maps are 2-dimensional tables indexed on RPM and engine load. You can tweak different sections of the map in different ways. Tune the heavy load sections (WOT and close to WOT) for max power output, and tune the cruising and light-throttle columns for fuel efficiency. It takes a lot of time to get it right, but it can be done.

[BlownSi05]

Not necessarily. The cam, fuel, and ignition maps are 2-dimensional tables indexed on RPM and engine load. You can tweak different sections of the map in different ways. Tune the heavy load sections (WOT and close to WOT) for max power output, and tune the cruising and light-throttle columns for fuel efficiency. It takes a lot of time to get it right, but it can be done.

this is correct....getting good gas mileage for normal driving (i.e. not WOT) involves working with your short and long term fuel trims in k-pro. these can be tuned to give you great gas mileage for your daily driving, in my case i get way better than i did stock. but you will dump fuel of course at WOT and hard driving, especially if you are boosted. it really depends on who tunes the car. some tuners go for max power at the cost of a little less driveablility. some tune for safety and economy. it really boils down to what you the driver wants out of your car.

[72chevel]

I was thinking of just creating a seperate map just for better gas mileage
Like if you have a 200 mile trip and the majority of the driving will be on cruise control at 60-65mph just tweaking the rpm range at 60-65 but I am not sure how low the A/F could be and still be safe for the engine.

[dann_04]

I'm really looking to just raise the vtec a little bit to say 2500 instead of 2200 and reduce the a/f ratio up to maybe 2500 as well to really pump out the mpgs in town. Right now(you'll all think i'm crazy) I'm shifting at about 2100 to stay out of vtec to get better mpg, but i would like to have longer non-vtec gears so i can skip 4th and go straight into cruising in 5th (at 40mph in town). I was thinking about trying out that diy vtec light to see exactly where it engages because i know that our tachs are off a bit. Did you guys know that if you have a 100k warranty it's extended to 105k becasue of a class action law suit about the odometer being off by over the legal limit of 4%(they say it's only off 5% hence the extra 5k) just wondering if you knew because i saw it on the work papers and asked about it when my cam was getting replaced at the stealership.

Also, all you guys with 6th gears, hows you mpg changed since you upgraded?

[jtyler05si]

i heard about that.... any reasoning behind honda's doings?

[dann_04]

If by doings you mean how they set up the engine and such it was for emissions sake. If by the junky accuracy on the speedo/tach...guessing it saved money and they thought no one else would notice. Interestingly enough, in illinois at least in 2003 our car was one of only eleven that earned the epa's smartway certification for emissions because of the ivtec system. The prius didn't make it to the list and the only other civic on the list is a cng civic. I though that was neat, but thats just me.

[4angrybadgers]

Dann, read about i-VTEC before you think about changing it. http://www.ephatch.com/forum/showthread.php?t=43043

Also, you're most likely hurting mileage by shifting at 2100. Engines have a certain RPM range where they are most efficient, and if you shift too low (especially on a 2L engine) you just hurt your mileage. Honda recommends shifting around 3.5k, so go close to that.

[dann_04]

I've already read up on the I-VTEC stuff and know about the cam angles and the low engagement point. I wouldn't do anything too drastic, i just want a more efficient engine when i'm not using it for power. I've always heard that engines all have their sweet spots and such, but i've always gotten best mileage from shifting earlier and moving through the gears quicker than from staying in each gear longer. I saw hondas recomendations and thought they were a little high but i may try them. With the metro i got for my dad a while back (1.3l 4cylinder) it was rated for about 38 over all and thats what i got when shifting at the recomended shift points, but i got about 48 when i shifted at 2k, same deal with escort and jetta, earlier you shift, the better the mpg's. I dunno, anyone here experimented with driving conservatively and shifting before vtec versus shifting at 3.5k? i typically get 28-30 mpg city and 32-34 highway. only mod is drop in k&n and ngk iridiums. I have a feeling that maybe i need to shift higher because of the difference in the sohc and ohv engines i'm used to and this dohc i-vtec. but then again on almost every mpg related thread i've read everybody says just drive conservatively and shift before 2200 rpms. Any opinions are welcome. I try to do alot of coasting too lol.

[ep3si02]

Also, all you guys with 6th gears, hows you mpg changed since you upgraded?


with the the 5 speed my gas light was turning on around 210-220 miles in a tank and now with the 6 speed its turning on around 240-250 miles..it all depends how i drive...on the highway it'll get around 26-27mpg keeping a pretty steady speed

[dann_04]

Also, for you six speeders...did you do it yourself and was it hard? I would like to do it and saw the parts are fairly cheap, but i have almost 0 tranny experience. I have done axles, alternator, oil change, tranny oil change, atf pan removal and fluid change, air filter, alternator, plugs, wires, distributor cap and rotor, radiator, heater core, thermostat, hoses, battery, brakes, rotors, throttle cable, radios, dropped engine from vw bug, ...and so on, do you think this is something i could do? I've seen the awesome write up on it, but want to here first hand how bad it was, just dropping the tranny sounds intimidating

[2004ep3hatch]

moved it for ya to right sub forum. there was a a guy on here that did fuel economy research and he got almost 30-32 mpg i believe. work really well.

[talonXracer]

I get 34-36 MPG on the highway, and that is a cammed A2 with RBC mani.

Yes you can tune the part throttle to get vastly better MPG than stock. The stock fuel maps are rather fat above idle(idle is where all the emissions testing is done at for tariff and fine purposes) to help keep lean condition warranty repairs/replacements at a minimum.

[sloweredcivic]

my a3 w5/speed is completely stock and i shift some where around 3500 with some wot passing and i am getting about 29-33 highway. i want to swap to a k24a1 and a 6 speed wondering what kind of mileage people are getting with one of these in a ep3 (with stock ecu and kpro)?

[r_jones06]

I took a 250 mile trip up through the mountains in Tennessee a few months ago and I was running about 75-85 the entire time and I averaged exactly 30 MPG on a stock computer with a K&N SRI

[sloweredcivic]

I took a 250 mile trip up through the mountains in Tennessee a few months ago and I was running about 75-85 the entire time and I averaged exactly 30 MPG on a stock computer with a K&N SRI

With a stock a3?

[dann_04]

I don't want to seem like an ass, but i want to make sure that people are calculating their mpg correctly when they are reporting their mpg #'s. Please be sure to say "when my light turns on i have gone *** miles and have a year 20**" when you use the tank method because it is not a very accurate method. If you're going to put a numerical value like 30mpg be sure to fill up your tank all the way and reset your trip odo, then drive till it is low and fill your tank all the way back up(at the same pump you used before) and divide the trip odo by the number of gallons put in. This is really the most accurate way to calculate mpg's. The tank method can be off by 10 mpg's so don't use it....or at least don't post it because it is misleading. Thanks and no offense.

As for the guy going like 85 through mountains and getting 30 sumthin mpgs, what method did you use? do you still have a cat? Was it mostly down hill? Did you coast? just curious.

Aslo anybody here have experience with Scantool? It's an electronic gauge that can show you realtime mpg and fuel rate. Looks like it might fit nicely where our little shelf below theradio is.

[r_jones06]

it was all interstate driving and never WOT. Just barely push the gas and you will get better gas mileage. I was suprised myself to get 30 MPG

[robhep3]

Just got back from a 150 mile (each way) weekend road trip. I'm running an a3 with a k24a1 head, Hondata IMG and Throttle Body Coolant Bypass, ARC Box, BCRH, Apexi N1 2.5" exhaust and the Hondata High Octane base tune, running 93 octane.

I averaged 31.5-32 mpg in both directions with the cruise set at 5mph over the limit the entire way.

[lleron]

The best mileage I have ever gotten was my last trip back to Boston. With the turbo and kpro I averaged slightly more than 33mpg (with me turning the A/C on and off intermittently). The same exact trip without the turbo and kpro netted around 28mpg. I'm still trying to figure that one out...

[1abSi]

yes just for a little reference, in my (old) k242 ep, it made 216/169 yet on trips i would get 36mpg (rsx 6spd tranny, sri, jrrh, t1r midpipe, stock axle back all played a roll i am sure)

[QDRHRSE]

I just went on a backpacking trip that involved a lot of freeway driving. On my way up I was getting 30.25 mpg driving briskly....maybe 75-80 the entire way. My car is relatively stock.

[Iluvcars]

yea u can use kpro to get better fuel mileage but you have to know what you are doing...so you should start reading on how to tune..so you could save your money and do it yourself cause tuning is expensive

Modding a car is expensive, no exceptions. You shouldn't mod a car that modifies the way the engine intakes or extracts air if you know that it will cost lots of money or make it unreliable

There are affordable tuning methods available out there. I know Mr. Pizza just got done. Pm him and he'll tell you how affordable and convenient it was

[MR.Pizza]

Yeah, I'm getting extremly good fuel economy and it was very proffesional and affordable. I was really expecting for it to get worse after the k24swap and a bigger turbo.:mangel:

[fatdong]

Its a catch 22 more hp = more fuel burned...better fuel economy = less hp

but im sure you could use kpro to increase your mpg but you would most likely lose some hp

thats faulty by it self

more hp = less work the engine has to do, producing more power, it depends how you drive it

[cerebrous]

My Kpro on the Hondata tunes(k20a3 high octane) SUCK in mpg

[cerebrous]

I drove 400Km on a full tank city driving.. thats 248 miles

[playap07]

i drove about 300miles give or take on a full tank to almost empty at a speed of 60-70. i was running low oct tune. before kpro i was about 250mpg to empty give or take

mods are aem v2, skunk2 mega power exhaust. thats all

[playap07]

My Kpro on the Hondata tunes(k20a3 high octane) SUCK in mpg

yea i ran that tune too and my gas just drained away....nice lil performance thought but still low oct better than stock and better with the gas!:biggrin1:

[AUTiger]

I definitely want to get k-pro in a few weeks. I kinda fear I am running lean. I made a drive today from Auburn, AL to Charlotte, NC and I filled up when I left. I made it all the way into the city of Charlotte and my gas light went on. I had made it 365 miles, i switched between windows down and up with the a/c on. I just replaced my primary o2 sensor last week and I have definitely noticed a major gain in mileage.

[EPSU3]

I'm currently getting an average of 31.2 mpg with my V2, DC shorty, megan test pipe, blox 2.25 cat back. I'm wondering if the Kpro low octane tune will squeeze a little more mpg and hp out.

[BlackEP9]

I get at around 30 mpg lately with a modified high octane program I use with KPRO. I was thinking of changing it to the standard low octane just to see what the difference is but haven't got around to it (for about 6 months..lol)