Elevation Question???
Thread Starter
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Elevation Question???
I took a trip to the mountains (elevation 1200 ft), what are the affects on a carbureted car?
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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"
TGO Supporter
Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
On ANY internal combustion engine, the higher the elevation ... the thinner the air. Thus a car perfectly tuned for Sea Level will run richer in higher elevations.
1,200 feet is not a LOT (except if you are racing...then it matters). So for a quick trip, don't worry about it. If you were to live permanently there, then you may wish to re-jet your carbs one step leaner.
Overall, your car will always perform less at higher elevations than lower elevations too. That is why NHRA has correction tables for higher elevations comparing them to Sea Level. This is to to allow you to say "If my car goes xx.xx @ 1,200 feet. At Sea Level it would go zz.zz (if it was perfectly tuned to the condition it ran at 1,200 feet."
Humity has an effect too.
1,200 feet is not a LOT (except if you are racing...then it matters). So for a quick trip, don't worry about it. If you were to live permanently there, then you may wish to re-jet your carbs one step leaner.
Overall, your car will always perform less at higher elevations than lower elevations too. That is why NHRA has correction tables for higher elevations comparing them to Sea Level. This is to to allow you to say "If my car goes xx.xx @ 1,200 feet. At Sea Level it would go zz.zz (if it was perfectly tuned to the condition it ran at 1,200 feet."
Humity has an effect too.
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