Gas mileage, ...increase by tuning? Options

[Aracheon]

I did a quick preliminary with no promising results, so, I'll ask the question myself.

Has anyone on here done a quick-and-dirty fuel tune with a piggyback on a stock (or mostly stock) 5SFE and seen a substantial (3+) increase in gas mileage? One of our local Honda tuners did a fuel tune on a stock Honda Civic and saw a huuuge MPG difference after raising the A/F ratios slightly. Understanding that this was done with more than a piggyback - he used Neptune.

But nevertheless, my question still stands... has someone done this with results?

[o0black0o]

I think every car has some tunes to do once you set after market parts on it. After my intake, and exaust, I just reset my ECU, I felts a the car run alot smoother and a bit or more acceleration. Never check the MPG tho.

[Aracheon]

I think every car has some tunes to do once you set after market parts on it. After my intake, and exaust, I just reset my ECU, I felts a the car run alot smoother and a bit or more acceleration. Never check the MPG tho.

Indeed. My 2000 Celica GT-S had an adaptive ECU that very obviously adjusted according to your driving habits. If I reset the ECU and then drove like a decent human being, I easy saw 420 miles per tank. If I reset the ECU and went out and drove like a ****ing madman, I'd be lucky to pull 380 out of that tank, and then even if I drove nicely after that, I still wouldn't get anymore than about 390.

But, that still doesn't answer my question. What I'm looking for is someone who has done this to a nearly stock 5SFE (I/H/E is okay) and whether they've noted a gas mileage increase.

[Agent21]

I just poured bars stop leak into the crank and gained about 5+ mpg (26-28 now suddenly 32.5). Still testng it though.

This post has been edited by Agent21: Nov 14, 2005 - 6:24 PM

[soulshadow]

Using a bigger 2.25 catback and Magnaflow Muffler The 4age engine deff. eats a lot more and has a lot more HP too. I can spin the wheels like crazy If I rev it high on first gear and then launch. But today when I attached a silencer on to the system. The headers have become really hotter and no matter how high I rev even to red line, the car only spins like wat 1 time and than it takes off. The car is overall slower, cause of the silencer and having more backpressure than the straight flow design when the silencer wasn't on it.

[Aracheon]

Using a bigger 2.25 catback and Magnaflow Muffler The 4age engine deff. eats a lot more and has a lot more HP too. I can spin the wheels like crazy If I rev it high on first gear and then launch. But today when I attached a silencer on to the system. The headers have become really hotter and no matter how high I rev even to red line, the car only spins like wat 1 time and than it takes off. The car is overall slower, cause of the silencer and having more backpressure than the straight flow design when the silencer wasn't on it.

What's that have to do with gas mileage or tuning?