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Old 08-06-2018, 10:07 AM   #21 (permalink)
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There's a way to calculate air density that I used to do when I flew because it is bad juju to take off from a too short runway. However in the enjoined 20 or so years I have forgotten it.

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Old 08-07-2018, 12:01 AM   #22 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
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Quote:
Originally Posted by Piotrsko View Post
There's a way to calculate air density that I used to do when I flew because it is bad juju to take off from a too short runway. However in the enjoined 20 or so years I have forgotten it.
Local (salt flat) data is available every IIRC 15min from 2 weather stations1 at the start and 1 ~ 1/2 down the big track, so ambant air density is available.
----
YouTube can be good . Gale Banks did a good presentation on Manifold Air Density MAD and how that has affected how he chases power versus others .
I asked the channel if thay had access to the Hot Rod Calculator
There response
Quote:
Banks Power
Ahh.. We don't have the calculator handy that you're referring to. We've requested a copy from HotRod.
Hopefully Banks has enough pull to get somebody to go digging in the archives and will share a sorce if/when successful.
---
MAD is one of my reasons why I am devloping a temperature controlled grill block referencing IC Nd engine coolent temperature. Cheep simple servo automated grill block active aero deployment. (Link). With additional blockages on other components that will open independently based on that components individual need. EG transmission cooler. this truck has a technical service bulletin advising not to drive the truck in overdrive below - 5F, this causes the viscosity to get to high in the air to liquid transmission cooler(aka it freezes) causing a restriction in the cooling circuit end result is' a burned-up overheated transmission, failure mode too cold. So I make shure that is blocked in winter( doesn't get hot enough to run without it covered in overdrive for two to three months where I live).
---
Quote:
Don't wanna repost this whole thing, BUT, paste your data into excel and it will do graphs easy peasy
How do i get exel on to a Samsung Note 5? The xp computer dusent go online.
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best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16


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'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
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Old 08-08-2018, 10:12 AM   #23 (permalink)
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Should ought to be excel apps. Or equivelants. I have one in my note 9, linux machine, and galaxy 3. Preloaded, Of course they all work differently, duh.

I thought the trip to the site for altitude was difficult/convoluted, which was why I suggested the airplane solution. Now I recall I used a whiz wheel.
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Old 08-12-2018, 02:42 PM   #24 (permalink)
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BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
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BZP T-100 (2011) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
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BZP T-100 (2009) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
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Last 3: 25.45 mpg (US)

BZP T-100 (2013) - '98 Toyota T-100 SR5
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BZP T-100 (2014) - '98 Toyota T-100 SR5
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BZP T-100 (2017) - '98 Toyota T-100 SR5
90 day: 20.78 mpg (US)

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Quote:
Originally Posted by gumby79 View Post
How do i get exel on to a Samsung Note 5? The xp computer dusent go online.
Google Play should have OpenOffice/Calc or LibreOffice/Calc should work. You could always use the cloud based Google Docs spreadsheet.
https://docs.google.com
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Old 08-12-2018, 03:52 PM   #25 (permalink)
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The question is how to display tables as in Permalink #18?

It seems there was some discussion here about that I can't find. Seems Xist was involved.

My thought would be Markdown. Write plain text, pipe it though the HTML formatter (local or online) and paste the result. https://github.com/adam-p/markdown-h...atsheet#tables
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Old 08-12-2018, 03:55 PM   #26 (permalink)
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Try this link: https://www.gribble.org/cycling/air_density.html
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Old 08-12-2018, 05:42 PM   #27 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 21.42 mpg (US)
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49k size is too big to insert spreadsheet so a croped screen shot will have to reprezent 3hrs of fighting with my device...
I'll replace the above copy paste
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1st gen cummins 91.5 dodge d250 ,HX35W/12
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


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Old 08-15-2018, 10:41 AM   #28 (permalink)
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calculations

I found my paperback book on automotive mathematics.
The book has only an approximation calculation for 1/4-mile time and speed (within 4% accuracy for an example problem given).
This won't help us.
The book listed some commercial computer programs available at a price,but none of them were germane to Bonneville.
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Old 09-09-2018, 09:07 PM   #29 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 21.42 mpg (US)
Thanks: 197
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Spent an hour on the dyno fighting with the transmission to get these images for you and of course me. 3-4 down shiftting @ full power.
You can see when the Governor starts to Defuel at 2000 RPM, and horsepower drops off.

Hence the squiggles on the simulated 1/4mi. from 6-10 sec.

Go go gadget auto rotate.
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1st gen cummins 91.5 dodge d250 ,HX35W/12
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


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Old 09-22-2018, 01:48 PM   #30 (permalink)
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130-mph

I spent some time thinking about the 130-Club.
*whatever the all-up race weight of truck is,with you inside,divide that by 13.336 to get your required horsepower,to get you 130 mph in one mile.
*If you're gonna start with 130,then you need to select an H-rated tire,so we can get a circumference.
*The surface velocity of the tread (11,400 feet/per minute),divided by the circumference will tell you your axle rpm.
--------------------------------------------------------------------------
*We need the engine's redline rpm.
*At redline,whatever your top transmission gear is,it's ratio will determine the output shaft/driveshaft rpm.
--------------------------------------------------------------------------
*between the driveshaft rpm and the axle rpm,this will determine your quick-change ring and pinion ratio to have you at redline as you exit the one-mile trap at 130.
--------------------------------------------------------------------------
*If you're gonna turn around and try for the 150,we've gotta start all over.
- you'll need V-rated tires and their circumference.
- the tires will be spinning at 13,200 surface feet per minute.
- with the new circumference we can calculate the axle rpm.
- the engine,again,will be at redline rpm.
- top gear will establish the driveshaft rpm.
- From this you can select your ring and pinion.
--------------------------------------------------------------------------
*I don't know what horsepower is needed for 13,200 FPM in 10,560-feet.
*the rolling resistance for V-rated tires is higher than for H-rated,so we'd need some more horsepower just for these tires.
*aerodynamic power required will be 33% higher.
* If you're going for 'time' you can streamline all you want.
* If you're going for a record,you'll be severely limited on aero,and will have to make it up with more horsepower.
--------------------------------------------------------------------------
*If we had the horsepower and total race weight for the 150-mph
Karmann Ghia LSR car,we'd have a power-to-weight ratio necessary for 150 in the 2-mile!

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