Considering a Power Commander

shit they got pc6's out already?!

 

Actually, the proof is a combination of things.

To me, if the bike runs smooth, no surging, no snatching, has linear throttle control, has a long engine life, and gets decent mileage, I could care less what a graph says. A dyno meter graph will only show you one very small characteristic of a bike's performance, max power. How much time do you spend at full throttle, maybe one percent. There are no mods for the VFR that are going to get you big HP gains. If you're looking for an impressive dyno graph, then get a supercharger kit from Toro, or buy a Vmax.

 

Use stock map.

 

Me too.
If the ECU uses different mapping for each gear, it cant be THAT different, and the PC3 would make the adjustments across all the gears.
Anyway as Code said, if it runs OK with no flat spots, surging or snatching,and reasonable fuel usage, who cares?
I would err on the rich side though.

 

I guess I didn't make myself clear. The graph will show the air\fuel ratio and power delivery all the way through the range. Flatter/smoother is "better." The graph measures it. I couldn't care less about a few horsepower either way at the peak because, as you say, the VFR's peak power can't be significantly increased - not with a Power Commander anyway.

 

Totally agree.

The problem is that I have yet to see anyone dyno every throttle percentage through all the RPM's possible. If you really wanted to do it right, you would also do that 6 times, once for every gear!

One important thing to keep in mind that, unlike most cars, most motorcycle fuel injection systems don't have any type of air flow meter. This is huge! Because of this, what looks real good on paper one day isn't going to look the same tomorrow, close, but not the same. There is air temp and MAP sensor, but it's not the same as an airflow meter. It cracks me up that people hack up there airbox and make super "high flow" filters not knowing that Honda has spent 100's of hours determining the airflow at all the various throttle opening and intake harmonics. Without an airflow meter to correct for any changes, you're really shooting yourself in the foot, but that's another topic.

Anyway, the main reason I like the Autotune, it's the next best thing to a airflow meter.

I like the PCV for the map-by-gear. I can set up the lower gears a little fat so that it runs right and lean it up a touch in 5th and 6th for better MPG. Even with the fatter mixture in the lower gears, I still get better mileage around town, and on the highway. The increased mileage around town comes from the fact I can now cruise the streets around town all the way down to 3K RPM, and it's still smooth as butter. You just have to be careful not to nail the throttle at 3K, the bottom end would not like that.

 

I am looking at it just so that the mods I make dont make it run to rich or lean. Not looking at Big HP gains more even throughout I assume that a PC of some sort a 3 or 5 would be best when changing filters and exhaust. Looking to get the most of my money etc.

 

yodasmile That's the same thing I said, but with WTF instead of shit. I'm happy with my PC3 w/t Cozye map, Can't complain :biggrin:

 

Yoda, do you run the cozy with the stock set up?

 

yodasmile Nope, I got the O2's Elim, BMC Filter, Pair Valve Mod and Baffles removed on the OEM Exhaust.

 

i got a hacked up air box, and i love the way the bike performs, but you're right. it is really hard to enjoy with all those holes in my foot. shifting is a bitch !!!

 

Might want to check this out. Really interesting. I've seen the same things first hand.

ROGUE RC51 Airfilter questions page

 

yeah but thats an entirely different engine, as in 2 cylinders not 4, 1000 cc's not 800, and in a much highers state of tune. you are comparing an engine with two of the largest throttle bodies in the game to an engine with 4 relatively small 36mm throttle bodies.

i can find plenty of links to dynos showing air box mods helping bike perfornce.

i know it doesnt always help, and i would like to do two back to back dyno runs with my stock filter and bmc, since youve brought this up, but all bikes are different.

also you have heard of the MAJOR midrange gain the rc51 boys get out of the flapper mod right?

and the 5.1 rwhp the busa boys get with kn race filter right?

 

Sure, that max HP might get larger, but you're going to pay the price somewhere else in the power band, usually in the place you ride at the most. I know that most people think the flapper is to lower in the intake noise, which is true, but it's main purpose is to maintain a strong low speed air flow, thus low speed performance.

Hey, have you heard the one about the PAIR making the ECU think the mixture is 19:1 and the ECU dumping it to 11:1 in the correction?

 

so by max hp do you mean the power band as a whole at 100% throttle, or do you mean the absolute max peak hp as a peak number?

 

Threadus Interuptus:

Does anyone have a legit dyno chart of a stock 6th Gen - no Power Commander, no aftermarket exhaust, no EFI mods? I would love to see one, because after I installed a LV exhaust and a PCIII and the DynoJet map, the bike actually ran worse. There was a BIG power drop before VTEC engagement and the air/fuel chart was a tall peak followed by a deep valley. I was PO'd at the outcome until I had the bike customed tuned by a shop that knows 6th Gens. After the custom tuning, it was Nirvana, both on the chart and in the real world. Peak power rermained anaemic - at slightly over 100 HP and 52 and a half foot/pounds of torque. But the bike is very rideable. I can ride it faster than I can ride my brother's Ducati 748. The VTEC transition point is not an issue, where before the custom map it was something to consider.

Sometimes mods can screw up the bike's performance . . . . ..

 

from here:

http://vfrworld.com/forums/sixth-generation-2002-2009/25869-dyno-run.html

 

Thanks. My chart with the PCIII and the downloaded DynoJet map showed an even bigger power drop before VTEC. The custom map straightened all that out.

 

its really weird how with most say domestic v8s and turbo diesels they really stick to "canned" tunes...
ie jet chips etc...