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Technical => Spud Miller's Cave => Topic started by: aafa760 on December 20, 2016, 07:03:15 AM

Title: Nitro % caculator
Post by: aafa760 on December 20, 2016, 07:03:15 AM

Hey Spud
On your site you have a Fuel calculator for % and temp  entires.

Do you a formula for entering  Specific Gravity and temp to get percentage?

Jim Hatley had a great one on the web and now his site is down looks like he may have left this earth.

So I enter 1.092 and temp of 67 result is **.* percent
Most fuel charts jump 7-8 on gravity and 2-4 degrees on temp
we run 82-92 percent depending on track and weather

Merry Christmas to All.
Bryan

Title: Re: Nitro % caculator
Post by: Spud Miller on December 20, 2016, 08:59:47 AM

 I have the great big hairy formula that takes TEMP and PERCENTAGE and delivers a precise SG. You could take that and solve for PERCENTAGE I guess. I don't have time to do it right now...sorry!

In spreadsheet speak with PERCENTAGE and TEMP substituted in for input cell numbers:

SG=((((100-(PERCENTAGE))*(0.792))+((PERCENTAGE)*1.139))/100)*POWER((528/(TEMP+460)),(1/3))

Spud

Title: Re: Nitro % caculator
Post by: dusterdave173 on December 20, 2016, 10:08:29 AM

Lordy I better stick to alcohol LOL!!! I did go to public school

Title: Re: Nitro % caculator
Post by: Spud Miller on December 20, 2016, 10:24:21 AM

 Ha! ;)

My online fuel calculator is smart phone friendly...you could do it from the track.

Or I could post a spreadsheet here...you'd need a computer and Excel at the track though.

I could also provide the temp/SG chart. You could look it up on the paper chart at the track.

 Spud

Title: Re: Nitro % caculator
Post by: aafa760 on December 20, 2016, 03:46:01 PM

perfect Spud that's what I was looking for

Title: Re: Nitro % caculator
Post by: Spud Miller on December 20, 2016, 05:09:20 PM

 Ok, attached is a PDF file of the chart. Print out and away you go!

 Spud