everytime is slightly different...
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
everytime is slightly different...
i think this iussue hasnt been discussed often...
did it ever happened to you to feel your engine is a bit lazy or, on the contrary to feel it quicker and more brilliant then usually, without any specific reason? well, it does happen to me all the time, it might be just a feeling but for sure my 406 engine sounds and 'feel' slightly different depending on what's the weather like, wet, dry, cold, warm, humid...i guess it's a 'pressure' iussue, bad weather=low pression...good weather=high pression...but it really performs in a different way. example: tonite the weather was clear, pretty dry and crispy cold, the engine sounded streight, full and went like a drag.
in cold and humid weather it gets a bit sleepy, in warm and humid even lazier. cold and dry=it's a rocket.
it does happen also to my griffith V8 engine, it could even arrive to ping under full throttle when cold and humid weather...the day after weather changes and the engine goes back to normal performance.
has anybody else experienced this?
did it ever happened to you to feel your engine is a bit lazy or, on the contrary to feel it quicker and more brilliant then usually, without any specific reason? well, it does happen to me all the time, it might be just a feeling but for sure my 406 engine sounds and 'feel' slightly different depending on what's the weather like, wet, dry, cold, warm, humid...i guess it's a 'pressure' iussue, bad weather=low pression...good weather=high pression...but it really performs in a different way. example: tonite the weather was clear, pretty dry and crispy cold, the engine sounded streight, full and went like a drag.
in cold and humid weather it gets a bit sleepy, in warm and humid even lazier. cold and dry=it's a rocket.
it does happen also to my griffith V8 engine, it could even arrive to ping under full throttle when cold and humid weather...the day after weather changes and the engine goes back to normal performance.
has anybody else experienced this?
Last edited by panic; Jan 26, 2007 at 06:25 PM.
Melting Slicks
Joined: Jan 2007
Posts: 2,589
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From: Salisbury Maryland
Yes, in both my Vette and my wife's Miata(oops! Did I say that?). I'm pretty sure it has to do with the air temperature and the humidity level. I'm sure the engine performs better with cold air being sucked in through the carb, rather than warm. It'll add a few more horses. The humidity, I'm not sure of the effect.
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Air density will make a difference. Cold dry air, inlet temperature is nice and cool, the air is not saturated so it picks up fuel vapors readily, life is good.
Hot & humid. Most carbs have trouble adjusting for the changes. Hot, the fuel vaporizes too quick and the metering circuits can't adjust, all the moisture in the air condenses and won't absorb any more.
I've seen lots of engines that would run great one day and terrible another- Density, temperature all make a difference.
Hot & humid. Most carbs have trouble adjusting for the changes. Hot, the fuel vaporizes too quick and the metering circuits can't adjust, all the moisture in the air condenses and won't absorb any more.
I've seen lots of engines that would run great one day and terrible another- Density, temperature all make a difference.
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From: Cape Cod, Mass.
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My cars definitely feel quicker when it's cold and dry out. That's why I hate to put them away in the winter.
My small blocks definitely feel slower after I drive the big block
My small blocks definitely feel slower after I drive the big block
