Allan
Dec 3 2005, 10:30 AM
I know it's really not that important to me right know being that my car is sitting in someone else's garage but WHEN I get it back and completely dialed in, at what altitude do carbs start complaining?
SLITS
Dec 3 2005, 10:35 AM
They don't complain....they jes get fat
And I doubt that you are going to stop and change jets to run above 5000'
On second thought, you could install a mixture control knob like on aircraft with some "minor" modifications to your Webers
Or maybe you could borrow Britt's Barometric compensator
Hi Allan & Good Morning
Allan
Dec 3 2005, 10:37 AM
So 5000' is the number?
SLITS
Dec 3 2005, 10:42 AM
Each 1000' of altitude will induce minor varations.....5000' is a good number to me as the varations are cumulative.
When taking off from a high altitude airport, it was common to run the mixture control for max power......
Now that that's said.....altitude is not the only factor...temperature, humidity, etc are also factors
SpecialK
Dec 3 2005, 11:15 AM
I remember driving from San Diego, to Denver. Car (not a porsche) got progressively worse, but "hit a wall" at around 8000'. Felt like I was pulling a 5th-wheel!
Gint
Dec 3 2005, 04:03 PM
This I can speak to from experience. I've driven my fair share of cars (carbuerated mostly) from the west coast to Denver. With carb'd cars, I always can feel a noticeable difference as soon as I hit 4000 feet. Around 10k+ you don't want to stop 'cause some cars can be a PITA to get the car started again. They will start, but takes some cranking. When I have to stop at that kind of altitude, I like to park downhill so I can roll start if need be. Now all of that is moot if you rejet as soon as you get to altitude.
Flat VW
Dec 3 2005, 04:18 PM
QUOTE (Gint @ Dec 3 2005, 02:03 PM) |
This I can speak to from experience. I've driven my fair share of cars (carbuerated mostly) from the west coast to Denver. With carb'd cars, I always can feel a noticeable difference as soon as I hit 4000 feet. And yes, around 10k+ you don't want to stop 'cause some cars can be a PITA to get the car started again. They will start, but takes some cranking. When I have to stop at that kind of altitude, I like to park downhill so I can roll start if need be. Now all of that is moot if you rejet as soon as you get to altitude. |
The other variable for me on the way to the Fall Foliage Classic ,at least, was that the car was packed to the gills.
I bet the car gained 300 lbs. in just cargo, plus a full tank of gas, etc.
I "pulled" my first mountian at about 4000' elevation, and I thought I might just cry, the power was so diminished.
Once I got to approx. 2,000' elevation, it was not near as noticable.
John
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