Weather in a Bottle?
11-04-2005, 02:24 PM
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Weather in a Bottle? How true is that.. Would nitrous help "eliminate" some high DA?
Right now my car is loosing about 70rwhp from SAE dyno numbers to real* track ETs..
Well, nitrous would make the car faster thats obvious but, if it can eliminate some DA would that make the car "even faster" on the same shot that a car with a lower DA?
*based on a HP from ET calculator...
Right now my car is loosing about 70rwhp from SAE dyno numbers to real* track ETs..
Well, nitrous would make the car faster thats obvious but, if it can eliminate some DA would that make the car "even faster" on the same shot that a car with a lower DA?
*based on a HP from ET calculator...
11-04-2005, 06:20 PM
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Originally Posted by LC1
How true is that.. Would nitrous help "eliminate" some high DA?
Right now my car is loosing about 70rwhp from SAE dyno numbers to real* track ETs..
Well, nitrous would make the car faster thats obvious but, if it can eliminate some DA would that make the car "even faster" on the same shot that a car with a lower DA?
*based on a HP from ET calculator...
Right now my car is loosing about 70rwhp from SAE dyno numbers to real* track ETs..
Well, nitrous would make the car faster thats obvious but, if it can eliminate some DA would that make the car "even faster" on the same shot that a car with a lower DA?
*based on a HP from ET calculator...
11-04-2005, 06:52 PM
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Originally Posted by cantdrv65
On a hot nasty +2000DA day you may make say 320rwhp...
right now my car puts down 320whp SAE...
my ETs are showing a 250whp at 7500DA thats a 70whp loss..
Anyway.. LS1s here are going from 14.9 stock to 12.5 on a 100 shot.. WTF?
11-05-2005, 06:20 PM
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Originally Posted by LC1
2000DA hot nasty? LOL, come race with me at 8000DA...
right now my car puts down 320whp SAE...
my ETs are showing a 250whp at 7500DA thats a 70whp loss..
Anyway.. LS1s here are going from 14.9 stock to 12.5 on a 100 shot.. WTF?
right now my car puts down 320whp SAE...
my ETs are showing a 250whp at 7500DA thats a 70whp loss..
Anyway.. LS1s here are going from 14.9 stock to 12.5 on a 100 shot.. WTF?
....The real indicator of the difference in power will be the trap speed. For a 100rwhp shot you should see a gain of around 10mph.... 
11-06-2005, 08:21 AM
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Originally Posted by cantdrv65
This question is very vague, but nitrous will simply add to horsepower to what you make NA...For example if you make 350rwhp on a -1000 DA day and you add a 100rwhp shot youd be at 450rwhp. On a hot nasty +2000DA day you may make say 320rwhp...On nitrous on that particular day youd make 420rwhp. So no its not really weather in a bottle. It does not replace the outside air the car runs on, if it did could you imagine how big the bottle would have to be?
Because nitrous is super-cold, it significantly cools your intake air temps. This, in turn, does greatly diminish the heat/humidity factor at the drag strip.
11-06-2005, 12:04 PM
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Originally Posted by XTrooper
Because nitrous is super-cold, it significantly cools your intake air temps. This, in turn, does greatly diminish the heat/humidity factor at the drag strip.
This is what i was asking...
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11-06-2005, 04:17 PM
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Originally Posted by XTrooper
Actually, nitrous can be considered "weather in a bottle" and, no, it doesn't "replace" the outside air, but it does super-cool it.
Because nitrous is super-cold, it significantly cools your intake air temps. This, in turn, does greatly diminish the heat/humidity factor at the drag strip.
Because nitrous is super-cold, it significantly cools your intake air temps. This, in turn, does greatly diminish the heat/humidity factor at the drag strip.
11-06-2005, 07:08 PM
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It's not about gaining MORE horsepower..
The shot will be a 150 shot.. and you will get "150whp" BUT if the cold nitrous kills the hot air, then the motor itself will LOSE less power because of this hot air...
Thats my exact question...
lets say...
on SAE numbers my car puts 320whp..
real hp from et calculator puts 250whp
if i add a 150 shot.. it would be 400whp
but if the cold nitrous colds intake temps that outside are killing hot maybe that gives a whatever "20whp" that the engine is NOT losing, the power is there.. hotness kills it....
is this?
The shot will be a 150 shot.. and you will get "150whp" BUT if the cold nitrous kills the hot air, then the motor itself will LOSE less power because of this hot air...
Thats my exact question...
lets say...
on SAE numbers my car puts 320whp..
real hp from et calculator puts 250whp
if i add a 150 shot.. it would be 400whp
but if the cold nitrous colds intake temps that outside are killing hot maybe that gives a whatever "20whp" that the engine is NOT losing, the power is there.. hotness kills it....
is this?
Last edited by LC; 11-06-2005 at 07:14 PM.
11-06-2005, 08:04 PM
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Originally Posted by LC1
It's not about gaining MORE horsepower..
The shot will be a 150 shot.. and you will get "150whp" BUT if the cold nitrous kills the hot air, then the motor itself will LOSE less power because of this hot air...
Thats my exact question...
lets say...
on SAE numbers my car puts 320whp..
real hp from et calculator puts 250whp
if i add a 150 shot.. it would be 400whp
but if the cold nitrous colds intake temps that outside are killing hot maybe that gives a whatever "20whp" that the engine is NOT losing, the power is there.. hotness kills it....
is this?
The shot will be a 150 shot.. and you will get "150whp" BUT if the cold nitrous kills the hot air, then the motor itself will LOSE less power because of this hot air...
Thats my exact question...
lets say...
on SAE numbers my car puts 320whp..
real hp from et calculator puts 250whp
if i add a 150 shot.. it would be 400whp
but if the cold nitrous colds intake temps that outside are killing hot maybe that gives a whatever "20whp" that the engine is NOT losing, the power is there.. hotness kills it....
is this?
Last edited by cantdrv65; 11-06-2005 at 08:23 PM.
11-06-2005, 08:47 PM
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DENSITY ALTITUDE. Density altitude (DA) is pressure altitude (close to altitude above sea level) corrected for nonstandard temperature. A high DA results when hot air makes the density of the air less than what would normally be at a given pressure altitude.
11-07-2005, 05:36 AM
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Originally Posted by cantdrv65
The point is you are not going to gain MORE horsepower in a higher DA. The effect is the same no matter the DA. Climate does NOT change the amount of cooling effect of the nitrous. It is NOT weather in a bottle at all. Think about it if what you are saying is true you would run the same times no matter the DA while on N2O, and thats simply not true.
11-07-2005, 05:44 AM
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Originally Posted by cantdrv65
Go to the strip on two different DA days. Run the 100rwhp shot. Say you run 120mph on a 6000DA day on nitrous. Also run NA. Next, run when the DA is 8000 also on nitrous. Say you run 118mph that day... Then run NA...Im willing to bet your NA traps on both days will be an equal amount less than the N2O traps... If not Im wrong.
Why? Because the DA will be less (for your motor) when you're spraying because the intake air temp will be reduced. How do you think density altitude is determined? One of the major factors is the ambient air temperature and this is effectively decreased when super-cold nitrous oxide is introduced. Outside your intake, the DA will be one thing. Inside your intake, the DA will be something altogether different because the air will be colder. Last edited by XTrooper; 11-07-2005 at 06:04 AM.
11-07-2005, 06:50 AM
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Originally Posted by XTrooper
Yep. You're wrong. Why? Because the DA will be less (for your motor) when you're spraying because the intake air temp will be reduced. How do you think density altitude is determined? One of the major factors is the ambient air temperature and this is effectively decreased when super-cold nitrous oxide is introduced. Outside your intake, the DA will be one thing. Inside your intake, the DA will be something altogether different because the air will be colder.
Why? Because the DA will be less (for your motor) when you're spraying because the intake air temp will be reduced. How do you think density altitude is determined? One of the major factors is the ambient air temperature and this is effectively decreased when super-cold nitrous oxide is introduced. Outside your intake, the DA will be one thing. Inside your intake, the DA will be something altogether different because the air will be colder. After the crack I was smoking last night wore off, I realized the difference between DA and elevation.... So yes, nitrous can eliminate some DA.
11-07-2005, 07:39 AM
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Originally Posted by cantdrv65
Yeah Im wrong. After the crack I was smoking last night wore off, I realized the difference between DA and elevation.... So yes, nitrous can eliminate some DA.
After the crack I was smoking last night wore off, I realized the difference between DA and elevation.... So yes, nitrous can eliminate some DA. 
I've smoked from that same pipe more than once myself.
11-07-2005, 12:26 PM
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Originally Posted by cantdrv65
Yeah Im wrong. After the crack I was smoking last night wore off, I realized the difference between DA and elevation.... So yes, nitrous can eliminate some DA.
After the crack I was smoking last night wore off, I realized the difference between DA and elevation.... So yes, nitrous can eliminate some DA.