by pertyfly » Tue Sep 13, 2005 6:24 pm
I agree with your statements, however.....
I also believe that with some modification, a vapor carb can be more beneficial than the existing systems we have with the electronics. The key is to get it to run consistently lean. I know, I know...lean=bad
But rich=bad too! Soo....why is it that lean is bad? anyone?
This would be (mostly) because the lean condition won't cool your explosion contact surfaces. Cyl, piston, etc. When it's not cooling, and consistently running hot, it has a tendency to overheat, and melt the pistons and things. This is why people don't just turn their carbs back to run rich.
However, I also believe that running fumes makes the fuel more uniform, so less fuel is no longer "lean" it's just the right amount, but in a more usable, combustible form. As I stated in another thread, currently the excess, liquid fuel is pretty much just to cool everything, absorb heat, and it burns a bit more through the stroke, and in the cat (adding nothing but bad emissions).
Now, I know I seem to be pushing this water injection thing, but that is (at this point in time) the best thing I can think of to do the job of cooling everything, and at the same time add some power.
Do, yes, fumes alone in your standard configuration, probably will not realise a HUGE benefit compared to modern injection systems (as it will need to run rich to run properly as well). But, like I said, we need to run it leaner and cool...that is the key.