New member & no bike

[BA80]

In theory the CV carbs are supposed to compensate for that

Oh boy... The CV carb is a wonder, but alas it will not and magically cannot increase the oxygen content into the amount of air it can flow at any given throttle opening at any given elevation/altitude.

Why attack me over that statement? It's a fact.

That is what the CV carb was DESIGNED to do.

What are you going to do, attach an oxygen tank to your scoot?

[motoman]

Why attack me over that statement? It's a fact.

That is what the CV carb was DESIGNED to do.

What are you going to do, attach an oxygen tank to your scoot?

Guess you could...........or a little 'juice' hosed to the vac. ports.............actually correct as I stated above. I DO know from my line of work experience which at one pont involved a vacuum pump for sucking on glass beads for reflection of painted stripes on hi-way that at 10,000ft. vacuum max. is 16in. at best. That's a good thing in these carbs favor as the spring is NOT overcome as much holding the needles farther down in the mains which helps to lean the mixture a bit to compensate for the lack of oxygen. IIRC, sea-level vacuum max. in the automotive world is at approx. 21-22in. Here, where I live at 5,000ft. the max. vacuum is at 18-19in. So, atmospheric pressure being less the higher the altitude, so is the oxygen content...........but, with your backround, you already knew that.....

[b.walker5]

Hi 1234, congrats on getting an MNS. When you figure out how, post some pics. We love pics. They either make us jealous or smug, depending on what the new bike looks like .

Despite all the rumblings on the merits of CV carbs (or lack of) the one thing to remember is that these beasts, when properly tuned, 'will pull like a schoolboy' from nothing to well over 100mph with very little effort, and getting the front wheel off the ground in the lower gears is relatively easy.

Dont under estimate it or it will try to bite you.

Did i mention we like pics...

[BA80]

Guess you could...........or a little 'juice' hosed to the vac. ports.............actually correct as I stated above. I DO know from my line of work experience which at one pont involved a vacuum pump for sucking on glass beads for reflection of painted stripes on hi-way that at 10,000ft. vacuum max. is 16in. at best. That's a good thing in these carbs favor as the spring is NOT overcome as much holding the needles farther down in the mains which helps to lean the mixture a bit to compensate for the lack of oxygen. IIRC, sea-level vacuum max. in the automotive world is at approx. 21-22in. Here, where I live at 5,000ft. the max. vacuum is at 18-19in. So, atmospheric pressure being less the higher the altitude, so is the oxygen content...........but, with your backround, you already knew that.....

Nothing can replace lack of oxygen but the CV does compensate for changes in atmopheric pressures and that's pretty much all you can do with a carbureted engine. The computer controlled fuel injection systems of today can match the fuel to the available oxygen. Just sayin'.

[natemoen]

Nothing can replace lack of oxygen but the CV does compensate for changes in atmopheric pressures and that's pretty much all you can do with a carbureted engine. The computer controlled fuel injection systems of today can match the fuel to the available oxygen. Just sayin'.

nitrous replaces oxygen very well, it is 66% oxygen.....

[BA80]

nitrous replaces oxygen very well, it is 66% oxygen.....

OK.....nothing short of hooking a tank to your intake. OK?

[CaptonZap]

Gotten off topic a bit, but your both correct in your statements. Gregs statement has to do with vacuum(or lack of at higher altitudes), and Howards has to do with oxygen content(or lack of at altitude). Unfortunately, both result in a substantual power loss. BTW Howard, gonna be paying you a visit, PM me a # I can reach you.

Heh Brant,
If you are coming this way, howsabout bringing the bearing puller with you?
I can meet you at Howards place.
I was getting the G back in shape after the 5700 mile western trip. Made some new upper motor mounts, so it will be interesting to see if the vibrations is lessoned.
I can come over and get it in a few weeks, if you can't bring it.
Howard, the week before I left, I bought a 79 Standard bagger. Needs TLC, but don't they all? Might make a good beater. Come on up and take a look.
Now back to your regularly scheduled nit picking. CZ

[Bonz]

BA80,

Wasn't attacking you any more than you weren't questioning Motoman's statement about power differences in our XS engines based on living at high elevation vs sea level. The tone seemed to be that somehow Brant's statement about the fact he and I live at higher elevation was not a factor in the way an XS can pull out from under you, because CV carbs are supposed to compensate for that.

The CV carb is designed to keep an equal mixture, per se, at most reasonable elevations, for driveability. Brant's statement was directly addressing the power issue. Your words specifically said the CV carbs were, in theory supposed to take care of that (power differences between high and low elevation). And in fact, they do nothing to that effect.

Must have been bad at reading between the lines on what you were saying, no worries. Ride on!

[motoman]

Heh Brant,
If you are coming this way, howsabout bringing the bearing puller with you?
I can meet you at Howards place.
I was getting the G back in shape after the 5700 mile western trip. Made some new upper motor mounts, so it will be interesting to see if the vibrations is lessoned.
I can come over and get it in a few weeks, if you can't bring it.
Howard, the week before I left, I bought a 79 Standard bagger. Needs TLC, but don't they all? Might make a good beater. Come on up and take a look.
Now back to your regularly scheduled nit picking. CZ

Your stop was first on agenda, just didn't know if U were back yet and rested.