| Author | Message | ||
     Froggy |
Hey guys, I posted this in the Xboard, but you guys looks smarter. I want to put a vacuum gauge on my 06 XB, what would I tap into for the vacuum source? | ||
| Etennuly |
There was a vacuum tube that was open on a friends '06 Uly, it was on the right side of the throttle body assy sticking up. I don't know what it was there for. But his bike runs much better since we plugged it. | ||
| Froggy |
Hogs suggested that too. Thats where the carbon canister connects. It normally is capped on the 49 state bikes. | ||
| Tq_freak |
Froggy, that is going to be your best bet with out drilling and taping a port in the intake manifold. I think it can be seen with the inner airbox bottom removed. What do you need the vacuum gauge for? | ||
| Froggy |
Trying to use a vacuum based fuel economy gauge. I want to break my 75mpg record, and every little tweak will help. I already am working on getting a custom aerodynamic fairing that includes covering the whole bike.  | ||
| Ourdee |
Froggy, It is a slippery slope you travel. Here are a lot of ideas: http://www.recumbents.com/home.asp?URL=wisil/whatsup.htm#Fairing Building Projects I got caught up in it for a long time. Most interesting is the Varna: http://www.recumbents.com/home.asp?URL=wisil/whatsup.htm#Fairing Building Projects  One more link: http://www.recumbents.com/home.asp?URL=wisil/whatsup.htm#Fairing Building Projects | ||
| Rwven |
How much of an effect does manifold vacuum have on fuel delivery in a fuel injected motor? It's not like you are sucking fuel through a port in a venturi like a carburated motor. | ||
| Froggy |
Ourdee, thank you, some good stuff there!  Rwven, not sure, that was one of my concerns too, but I got no better way to monitor fuel consumption on the fly. I even got my race computer to estimate consumption, but it can be way off depending on my riding. | ||
| Rwven |
Since the fuel is metered electronically it is possible to design a readout of fuel consumption. How to actually do that is way above my pay grade. | ||
| Froggy |
Mine too.  I am sure if anything, it can be done with ECMspy, but I am dead in the water after that. I will play around with it more and see if I can figure out something. | ||
| Ourdee |
You may want to modify the signal the O2 sensor sends. You can put off the engine lean knock by adding steam to the intake side. Problem is that the O2 sensor will read this as oxygen and try to add fuel back in. So, you have to further modify the O2 signal. Same thing happens when you try to free hydrogen and oxygen from water with electricity into the intake. There are some ways to get some serious mileage out of an engine on very little fuel, it depends on how serious you want to get. | ||
| Tootal |
Sounds like your trying to ride your bike so it doesn't SUCK so much!?  | ||
| Froggy |
Over time I will see how serious I can get. I just love riding with the Jap bike guys, and when they stop for gas I am parked on the side for 2 out of the 3 fillups (assuming their asses don't hurt after the first 20 miles of riding). I am thinking of adding an extra tank too eventually, the short 240ish miles before the gas light comes on kills me. I know some BMW guys that can go about 600 miles a tank right from the factory. | ||
| Tootal |
Mine ran out completely today at 190 miles! Two blocks after I passed a station!  | ||
| Xbimmer |
I know some BMW guys that can go about 600 miles a tank right from the factory. That's pretty impressive... which bikes would those be I'm wondering? | ||
| Froggy |
One of the super duper espresso maker equipped models has a 9.5 gallon tank. | ||
| Davo |
froggy, Most of my experience with a vacuum gauge on these engines has been marginal. I was using the vacuum gauge for timing and tuning the idle circuit. The V2 HdXL engine has a very weak vacuum signal at idle. In fact the needle will just about beat itself to death. It demonstrates how important the heavy flywheel is to the engine in order for it to maintain forward momentum. I never used the vacuum gauge for fuel economy on a motorcycle. Please keep us posted as to your results. | ||
| Rwven |
That would be the R1200GSA Adventure. I think it has about a 8 or 9 gallon tank... | ||
| Natexlh1000 |
I installed one on my old 1986 civic and managed to get 42 mpg out of it. I was using it to figure out the vacuum advancers on the distributor. I ended up just mounting it to the dash permanently for fun along with a voltmeter, tach, various random other crap | ||
| Froggy |
My gauge came in yesterday. It would of helped if I read the description, this thing is huge, its bigger than the gas cap. Now the fun part of mounting it on my already crowded bars. | ||
| Ourdee |
I use an Auto Meter sport comp in my Jeep. I think it is 2 5/8". Jeep was rated at 17 mpg highway with an automatic. I've got over 19 mpg by keeping it over 12 inches. | ||
| Ronmold |
Check this out for milage: http://www3.edenpr.org/wps/portal/ No joke, this was a gas/electric hybrid | ||
| Froggy |
Except mine will be street legal, can go faster than walking speeds, and still let me keep up with the other Buellers going down wolf pen gap |
