Ever since I've done the airbox flapper mod 04RR I've noticed that I'm using more fuel. Before I did it I'd consistently get around 120 miles before the fuel light illuminated, now I'm getting around 111. I know it's not a huge difference but it definitely makes a difference. I guess if the flaps are constantly open it'll be sucking in more air, therefore the PCV will push in more fuel to compensate?
Most things that create more power use more fuel unfortunately if I was worried I would be on a moped lol
That's not always the case mate, running lean (less fuel) can often result in an engine producing more power, but shag the reliability. Best examples are remapping forced induced cars- standard 150bhp, generic mapped applied, 210bhp and better fuel economy.
Slightly OT but since I fitted my PC5, the fuel usage function on the dash computer is now out by about 15%, which makes sense because the map I am running is about 15% richer on average, and the PC5 adjusts the injector usage which is set by the ecu map. This is a bit of a pain because I used to use the dash computer as a fuel gauge in the absence of a proper one.
Are you sure, i have found since putting the Yoshi and PCV on that i get a hell of a lot more miles to a tank of fuel. Stock i only used to get about 110 miles until the light comes on, now i get 150 miles when the light goes on, it is much much better on fuel, and the numbers on screen tie up almost exactly with the calculations made based on how much fuel i am putting in.
That's interesting, going to fit a PCV on my otherwise stock Blade. I notice the stock PCV map generally leans out the entire map, so I expect more power and economy happy days!
What map are you running? I am running the one from the website or CD for the euro 1000rr with yoshi R77 and no baffle.
I'm using the one from the web too, euro 1000rr with yoshi rr7 and custom filter. Until tomorrow when i get the custom mapping done.
There seems to be a number of yoshi maps M16-002-504 2009 Honda CBR1000RR European model Yoshimura R-77 slip-on Stock or aftermarket air filter O2 Eliminator fitted ,M16-002-507 2009 Honda CBR1000RR European model Yoshimura slip-on exhaust with baffle Stock or aftermarket air filter Dynojet O2 eliminator fitted M16-002-508 2009 Honda CBR1000RR European model Yoshimura slip-on exhaust Stock or aftermarket air filter Dynojet O2 eliminator fitted All of them generally richer than the base map, will be interesting to see how close these are to your custom map.
M16-002-507 Thats the one i am using. I'll be interested too, the PCV has made a massive difference already, so i am interested in seeing what difference a custom map will make.
I am running the M16-002-504 2009 Honda CBR1000RR European model Yoshimura R-77 slip-on Stock or aftermarket air filter O2 Eliminator fitted And I must say I am just about over the hunting at idle it is driving me nuts. I will be very interested to hear if your dyno tuner is able to get rid of it because everything I have tried hasn't worked except for putting in the baffle, which I dont like doing because it cuts down the performance at higher revs. It looks like honda knew what they were doing with the stock exhaust and the flapper valve.
I'll see what happens, my maps will be slightly different as i have the Secondary fuel module so the upper injectors will be mapped seperately. How much is yours hunting by? I'll see what happens map wise. Cheers Pete
The revs go up and down between 1200 and 1300 rpms at about 1 second intervals once the engine is up to temperature, which would make you think it is rich but leaning it off doesn't help and richening it doesnt do anything either. I think it is a resonance of the slipon pipe that is causing it, and wonder if disabling the PAIR system would help.(probably not)
Hmm i'll see with mine, i dont know if doing the PAIR mod would help as you would just put in more air, therefore need more fuel and that in turn would just level itself out. I 'll ask the tuner tomorrow and see what he says.
they all do that surging once you fit a free flowing can on it.havent heard if custom dyno maps fix this or its something you get use to. I did do a ecu reset which has stopped it doing it as bad as it was.hardly notice it much now.
In theory doing the PAIR mod shouldn't effect the fueling at all because the air is injected into the exhaust port but in practice I'm not so sure as these engines probably run a lot of valve overlap and maybe some sneaks back in before the exhaust valve closes especially at low RPMS/ idle????. Removing the PAIR did affect fuelling on my VFR at idle
