Chimney Draft Vs Atmospheric Conditions

 
ddahlgren
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Post by ddahlgren » Mon. Feb. 27, 2017 4:42 pm

As a racer for over 40 some years give me a 45 to 50 degree humid night an will make serious power not 100% from air density but from the anti knock from the humidity. Up the main jets 2 numbers add 2 degrees ignition lead response goes up power goes up and we get real sporty. LOL

 
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Sunny Boy
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Post by Sunny Boy » Mon. Feb. 27, 2017 5:31 pm

S'matter,.... too much work to hook up a water/alcohol injection kit for those dry days ? :D

Paul

 
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Pancho
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Post by Pancho » Tue. Feb. 28, 2017 7:15 am

ddahlgren wrote:As a racer for over 40 some years give me a 45 to 50 degree humid night an will make serious power not 100% from air density but from the anti knock from the humidity. Up the main jets 2 numbers add 2 degrees ignition lead response goes up power goes up and we get real sporty. LOL
Sunny Boy wrote:S'matter,.... too much work to hook up a water/alcohol injection kit for those dry days ? :D

Paul
"BOOST IS THE ANSWER!!".

Gimme a single intercooled turbski with a little water/meth injection and LET ER EAT!. Make my own atmosphere's. :)

Not to get further off track....but guys are making stupid reliable power with moderate boost and E85 on stock bottom ends (newer generation of engines, not the old school SBC/SBF stuff). It's a great time to be a go-fast guy. :punk:

 
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Post by ddahlgren » Tue. Feb. 28, 2017 1:49 pm

Sunny Boy wrote:S'matter,.... too much work to hook up a water/alcohol injection kit for those dry days ? :D

Paul
Short track stock car racing at night. While not many rules 30 years ago that would have never gotten through.


 
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Lightning
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Post by Lightning » Tue. Feb. 28, 2017 8:47 pm

So I thought this was interesting. It turns out that the Samsung Galaxy 6 has a pressure sensor, and it's remarkably sensitive. I downloaded an app to make use of it. It has resolution down to 1 pascal which is one hundredth of a millibar. I calibrated it to correct for altitude relative to sea level here at home. Even when the wind blows against the house outside, I can watch the pressure fluctuate on this app.

I haven't been able to see a change in draft performance between high and low pressure systems passing thru. There has been too many other variables to skew it.

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Lightning
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Post by Lightning » Tue. Feb. 28, 2017 8:56 pm

Below are screen shots of the pressure tracker app and a pressure reading from the weather underground app. It's always within a few tenths of a millibar. Crazy huh?

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Sunny Boy
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Post by Sunny Boy » Wed. Mar. 01, 2017 9:06 am

Lee,
Neat app. If he doesn't already have that, I think my brother may need a new phone for his boat. ;)

But, tell us the truth. You only have a coal stove so you can use more gadgets, right ? :D

Paul

 
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Lightning
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Post by Lightning » Wed. Mar. 01, 2017 9:25 am

Sunny Boy wrote:Lee,
Neat app. If he doesn't already have that, I think my brother may need a new phone for his boat. ;)

But, tell us the truth. You only have a coal stove so you can use more gadgets, right ? :D

Paul
You know it partner!
The more gadgets the better lol.

When it gets cold out again I'll see if the pressure sensor app can pick up on stack effect in the house. I should be able to see a few pascals higher upstairs compared to downstairs.


 
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Sunny Boy
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Post by Sunny Boy » Wed. Mar. 01, 2017 2:31 pm

It's 62F outside, overcast, damp, and off/on lightly raining. Barometer is reading 29.4 and dropping. Stove is very sluggish,... compared to when it was 70F, sunny, and the baro was reading about 30.2 last week.

Paul

 
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Lightning
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Post by Lightning » Wed. Mar. 01, 2017 3:15 pm

It'll be hard to compare without the humidity effect. Low pressure generally brings moisture and rain, high pressure generally brings dry and clear. :)

 
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Sunny Boy
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Post by Sunny Boy » Wed. Mar. 01, 2017 4:10 pm

It was plenty damp enough. ;)

Paul

 
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Sunny Boy
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Post by Sunny Boy » Sat. Mar. 04, 2017 2:26 pm

Today, (Saturday) it's 14F outside and clear. The barometer is reading 30.5+ and the stove is wanting to take off like a rocket - even with the MPD fully closed.

At each reloading I'm mixing in lots of small bits and fines, dug out of the center of the coal bin, just to help hold it back. And it's nice not to see all that heat in the fines going to waste. ;)

Paul

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