help me understand pc8/yosh box? fix for fuel consumption? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 11 Old 04-17-2012, 08:41 AM Thread Starter
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help me understand pc5/yosh box? fix for fuel consumption?

so i'm reading all these threads about the pc8 and the yosh box, but im not really clear on what they are supposed to do other than give higher performance or better engine response?

Here's my situation: I often travel Toronto - Montreal and Toronto - Philly where I end up 5-6 hours on boring, flat highways. Is there anyway a PC8 or a Yosh can be used to "improve" fuel performance? what i mean is that can this be used to "lean" the engine during this type of riding, and then switched back to "normal" when hitting mountains or twisty backroads?

2008 Vstrom DL 1000

Last edited by toronto_nic; 04-17-2012 at 08:57 AM.
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post #2 of 11 Old 04-17-2012, 08:49 AM
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I can speak for the PCV

I use the Power Commander V (Five; not sure where you're getting 8 from) fuel injection module on my '09 1K. The primary purpose of such modules is to replace the factory fuel map with a map that has richer fuel delivery at certain fueling and rpm points. Installation of the PCV resolved the lean surging that occurred between 3.5 - 4.5K rpm, which is where I spend a lot of time when riding. I suspect that Suzuki maps the 1K as lean as they do in order to meet emission and noise regs (esp. the former, insomuch that the 1000 is not equipped with dual plug heads or a catalyst.)

Another advantage of the PCV is that it is tunable. The rider or dyno tuner can create a custom map that best meets the needs of the rider and his regular riding habits and environment.

Installation of the PCV is plug-n-play, which is nice. Note that PCIIIs are generally indicated for MY2008 and older motorcycles.


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post #3 of 11 Old 04-17-2012, 08:56 AM
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Stock fuel map on the Vee is lean enough already don't you think? Any leaner and it's going to be running hotter than it already does, and it'll start detonating.

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Mod list - Oxford heated overgrips. Garmin GPS w/Aquabox RAM mount. Mirror extenders. Givi V35 saddlebags, engine guards, and Kappa top box. Adventure Tech fork brace, wheel spacer, sidestand foot, and peg lowering kit. Gafler braided front brake & clutch lines. K&N air filter. Pyramid Fenda Extenda. GO Cruise throttle lock. Touratech folding shift lever. Rad guard. GSXR 4 piston brakes with SV Racing brackets. Yosh timing cover. SW Motech center stand and crossbar. Eastern Beaver headlight relay. 12 O'Clock Labs Speedo DRD. Werks clutch basket. Corbin seat.
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post #4 of 11 Old 04-17-2012, 09:03 AM
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Get a 650.......and what kind of mileage are you currently getting?

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post #5 of 11 Old 04-17-2012, 09:16 AM Thread Starter
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i figure (non scientific) that i'm averaging about 320km a tank. roughly 200 miles to a tank in mixed riding.

2008 Vstrom DL 1000
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post #6 of 11 Old 04-17-2012, 09:47 AM
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Originally Posted by toronto_nic View Post
i figure (non scientific) that i'm averaging about 320km a tank. roughly 200 miles to a tank in mixed riding.
That is actually pretty darn good for the 1000.

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post #7 of 11 Old 04-17-2012, 10:00 AM
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Quote:
Originally Posted by toronto_nic View Post
i figure (non scientific) that i'm averaging about 320km a tank. roughly 200 miles to a tank in mixed riding.
If you are getting 320km to a tankful I don't think you are going to improve that. Seems that most everyone that goes with the Yosh/PC loses mileage. Most consider it worth it as they do improve driveability. I am currently working on a map for my Vee to improve range/mileage. I was in the 30 mpg range ( 145 miles range ) and have it up to 34 mpg and went 165 miles on the last tank.

The stock setup on a Vee is going to be hard to beat for mileage.....

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post #8 of 11 Old 04-17-2012, 10:37 AM Thread Starter
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thanks everyone, that's what i wanted to know.

However, It got me thinking. Are there bikes out there with phenomenally "good" gas usage?

Sometimes I'm surprised a bike doesn't get 60+mpg considering how much less weight/bulk we have compared to a car?

2008 Vstrom DL 1000
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post #9 of 11 Old 04-17-2012, 12:04 PM
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get 650. There are certain conditions when I got 400 km on a tank, but that happens twice per season, normally 470, and some times 530 - 540. The last only at temperatures more than 25C at high elevations. There are no power commanders as well. Rumors are the new one is even better.
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post #10 of 11 Old 04-17-2012, 12:28 PM
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Quote:
Originally Posted by toronto_nic View Post
i figure (non scientific) that i'm averaging about 320km a tank. roughly 200 miles to a tank in mixed riding.
I have no fuel map adjustment gizmo's and I'm getting between 320km - 360kms per tank when I'm good (keeping to just over posted speed limits). MMV when I'm bad (and mostly I'm bad!)

As per previous responses, if I had wanted better fuel mileage I would have gotten a Wee.

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