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#1 |
Senior Member
![]() Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Humidity
Any ideas if High humidty will affect performance and Air/Fuel mixture?
humid as hell this morning truck seemed a little sluggish
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks ![]() |
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#2 |
Senior Member
![]() Join Date: Apr 2008
Location: Franklinton NC
Posts: 1,309
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Re: Humidity
Yes it will. You are adding more water to the fuel mixture and water doesn't burn to well
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#3 |
Registered User
![]() Join Date: Sep 2010
Location: Formerly MD and San Diego, now loving life in Arizona
Posts: 1,636
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Re: Humidity
The old J57 turbines on the B52 aircraft loved humidity and water. Seemed to make the compression go from 10,000lbs of thrust to around 12,500lbs (per engine) when they injected water directly into the inlets of those engines during take-off. Unfortunately the aircraft only held 1200 gallons and would use that entire 1200 in the first few moments of take-off.
Too bad internal compression engines don't like hot humid weather!
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Alan 2012 Ram 3500 Dually Crew Cab 6.7 Cummins 2014 Palomino Columbus 340RK 5th wheel '69 Chevy C10 396BB |
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#4 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Humidity
Look at it like this. For more HP, many tractor pullers run a water/alchohol injection system. That is mostly on a diesel vehicle, but in the late 70s and early 80s there were water injection system for the enimic cars that were out there. The expansion of a water droplet into a steam cloud is a lot of BTUs of power.
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Frank |
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#5 |
Registered User
Join Date: May 2013
Location: Central NC
Posts: 830
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Re: Humidity
Plus more water, less air.
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1972 Cheyene C-10 "Ole Green" My Grandfathers truck (early 70's to 1983) My first vehicle (1983) Original 350 (3 rebuilds) 700R4 from Bowtie Overdrives ![]() |
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#6 |
Senior Member
![]() Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
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Re: Humidity
It will make more power but you have to tune for it.
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#7 |
Senior Member
![]() Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Humidity
well i think the idea of water and alcohol injection is to lower intake tempertures and to increase combustion , as far as everyday weather humidity is what i am talking about, just seemed like the chevy did not run as good the other morning compaired to most morning on the way to work, like something was holding it back or there was a drag or something
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks ![]() |
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#8 |
Senior Member
![]() Join Date: Apr 2008
Location: Franklinton NC
Posts: 1,309
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Re: Humidity
Too much alcohol in today's gas,the truck was drunk.
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#9 |
Registered User
Join Date: Jan 2012
Location: Glencoe Alabama
Posts: 510
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Re: Humidity
I always think of it this way. Humid air is thicker and your truck can't swallow as much as thin air. Your truck will run richer with the thicker air.
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72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus |
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#10 |
Registered User
Join Date: Nov 2012
Location: 9
Posts: 862
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Re: Humidity
Any naturally aspirated engine that uses air in its combustion process will not make more power with less air density.
Air density decreases with increasing altitude, as does air pressure. It also changes with variation in temperature or humidity. |
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#11 |
Registered Cruiser
Join Date: May 2002
Location: Las Vegas NV
Posts: 2,230
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Re: Humidity
It's humid here today. The truck ran ok, but my A/C iced up.
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I intend to live forever. So far, so good. |
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