Ok so I'm not the smartest person on the block I understand more boost pressure = more power... but if the hondata reflash gets better mpg they would post it and make a HUGE fn deal about it!! and not tell people that that we have not tested it yet, whatever! Please prove me wrong i could use more more mpg on the rdx

 

sell it, if you really want more MPG :shakehead

 

But my point is that you reflash can get mpg and more power is 100% bs, .. Honda built this motor and the turbo! are they are too stupid to figure out how to get more HP and more Mpg? This is all they do! They want the most power and the most mpg! If you believe you can get more power an better mpg then i would question everthing from the ground up on the rdx

 

I would love more mpg and power with no engine life loss . Who the f#%#k would not

 

part of the reason for not putting the engine tune right on the "edge" for maxinum power, and fuel economy

because they do not know HOW the engine will be treated once taken off the dealer's lot, whether or not it will have frequent oil changes
or let alone if it will have premium fuel put in on a regular basis (and if you are willing to buy a tune, you are more willing to put the best gas you can find on a regular basis)


but here is one other thing too, they HAVE TO WORRY ABOUT NEW CAR EMISSIONS, which is alot stricter then what aftermarket companies have to deal with, so the tune has to represent that too (i know on the 09 Subaru WRX, Subaru actually holds the fuel mixture very lean till about 4k rpms for emission purposes, then after that point it goes to where it needs to for power and such)

 

I had the reflash and K/N drop in filter on my 08 RDX for about 1 year. My combined mpgs were about 18.5-19.5 mpgs before the reflash. I now average about 19.8 - 20.8 after the reflash on my trip B combined mpgs. The 19.8 combined is from the coldest winter we had +30 years; but, I always was above 18 mpgs between fill ups. I do boost the about the same or a little more since the reflash.

I find I don’t have to rev the engine higher or longer with the extra power. I can accelerate faster in a shorter amount of time to get up to speed and then off the boost to maintain my speed. The same time it took me to get to 75-80 mph in non-Hondata RDX; I can be going +90 mph in the reflash RDX.

Other folks on the forum can explain the change in air fuel mixture ratio and the inverse reaction of the flux capacitor in relationship of antimatter particles in the warp coils. I just know this is not snake oil; the $hit really works!! The increase is not dramatic; around 1 or 2 mpgs combined. I think the power increase and mpg improvement would be felt more for the FWD RDX when that reflash is available (lighter overall weight of FWD and less power loss because of no sh-awd).

 

Ok, so before we all blow a fuse here, this is the deal as far as the re-flash and MPG goes

Firstly, what friesm2000 said above is just about 100% correct ( also allot of legalities co-inside)
Now what the re-flash (Hondata) has done it to raise boost, add fuel, and add timing in the parts of the ECM programing where it is needed for the increase power and torque.
On the other side of the graph (boost curve{vacuum}) they have leaned out the fuel a bit. This is the area where very light loads are used (no boost areas) such as cruising coasting etc. It is in this part of the tune that an increase in MPG is observed.
So, with re-flash, If you have a "lead foot" and are always in boost with spirited driving you most likely wont see an increrase in MPGs, as a matter of fact your MPG will probably decrease!
But, if you drive " like your granny" and stay out of boost as much as possible, then you benefit from the leaned out area and as a result an increase in MPGs!

Hope this clears it up a bit.

 

Thanks for all the great info the info .

 

wife can get like 28-29 mpg out of the subie, while me i am lucky to even get 20 if i drive it