Search String: Display: Description: Sort:

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Octane\s+and\s+altitude\s+ratios\?\?\?\s*$/: 42 ]

Total 42 documents matching your query.

1. Octane and altitude ratios??? (score: 1)
Author: "Andrew B. Lundgren" <lundgren@iname.com>
Date: Sun, 02 Jul 2000 09:56:37 -0600 (MDT)
Edwin knew the information on oil measurements, does anyone know of an equation that allows you to take altitude into the calculation when trying to determine the correct octane fuel? I know higher c
/html/mgs/2000-07/msg00022.html (7,933 bytes)

2. Re: Octane and altitude ratios??? (score: 1)
Author: Bullwinkle <yd3@nvc.net>
Date: Mon, 03 Jul 2000 21:19:17 -0700
This response is just hypothetical and I have no hard facts, but: At a higher altitude the air density is less. Even though you are compressing it at the same ratio, the compressed charge would have
/html/mgs/2000-07/msg00068.html (8,117 bytes)

3. Re: Octane and altitude ratios??? (score: 1)
Author: "Andrew B. Lundgren" <lundgren@iname.com>
Date: Tue, 04 Jul 2000 08:45:03 -0600 (MDT)
That is exactly correct, and what I have been looking for is equations to figure out the the right number. Andrew Lundgren Lundgren@iname.com http://www.itwest.net/~lundgren
/html/mgs/2000-07/msg00074.html (8,670 bytes)

4. Re: Octane and altitude ratios??? (score: 1)
Author: James Nazarian Jr <James.Nazarian@Colorado.EDU>
Date: Tue, 4 Jul 2000 17:50:57 -0600 (MDT)
I don't have equations, but I think the gas companies have done that already. The lowest octane gas here in CO is two points lower than the lowest octane at sea level. Like I said, no formulas, but t
/html/mgs/2000-07/msg00103.html (9,550 bytes)

5. Re: Octane and altitude ratios??? (score: 1)
Author: David Councill <dcouncil@imt.net>
Date: Tue, 04 Jul 2000 19:07:32 -0600
I thought of that idea too, but I think our petrol here in Montana is also about two points lower than sea level. You didn't mention numbers but regular unleaded here is 85. And we are only at 4000 f
/html/mgs/2000-07/msg00106.html (9,081 bytes)

6. Re: Octane and altitude ratios??? (score: 1)
Author: Gonaj@aol.com
Date: Wed, 5 Jul 2000 09:48:05 EDT
Maybe I have misunderstood something in the past, but I am under the impression that your engine never needs a lower octant it simply nosen't need the higher octane. In other words there is no loss o
/html/mgs/2000-07/msg00115.html (8,272 bytes)

7. Re: Octane and altitude ratios??? (score: 1)
Author: David Councill <dcouncil@imt.net>
Date: Wed, 05 Jul 2000 10:19:59 -0600
This is correct, which to some extent explains the lack of scientific calculations of octane versus altitude. If the engine pings or diesels after shutting it off, you may need to run a higher octane
/html/mgs/2000-07/msg00130.html (9,012 bytes)

8. Re: Octane and altitude ratios??? (score: 1)
Author: "Andrew B. Lundgren" <Lundgren@iname.com>
Date: Wed, 5 Jul 2000 10:32:24 -0600 (MDT)
That damage to the pocket book is what I am trying to avoid. I have a Ford Explorer as well as an MGB that gets 15-16mpg... The owners manual says 87 or higher, but I think that is calcualted for sea
/html/mgs/2000-07/msg00131.html (9,097 bytes)

9. Re: Octane and altitude ratios??? (score: 1)
Author: Max Heim <mvheim@studiolimage.com>
Date: Wed, 5 Jul 2000 10:41:17 -0700
I think you are correct. BTW, the supposition that sea level regular gas is 87 octane was also correct. We have 87, 89, and 92 here in the Bay Area. Gonaj@aol.com had this to say: -- Max Heim '66 MGB
/html/mgs/2000-07/msg00135.html (9,222 bytes)

10. Re: Octane and altitude ratios??? (score: 1)
Author: "Walt Goddard" <waltcpa@sierra.net>
Date: Wed, 5 Jul 2000 13:08:38 -0700
Here in eastern Nevada at 5200 feet we have 85, 88, 91 at the local Amoco. Not all major brands are the same here though. I believe 76 and Chevron may be a bit higher. Walt Goddard waltcpa@sierra.net
/html/mgs/2000-07/msg00148.html (9,845 bytes)

11. Re: Octane and altitude ratios??? (score: 1)
Author: Max Heim <mvheim@studiolimage.com>
Date: Wed, 5 Jul 2000 14:00:43 -0700
Your Explorer may get better mileage with premium fuel since it has a knock sensor, which automatically advances the timing (within a limited range) until it encounters knock, then retards until the
/html/mgs/2000-07/msg00159.html (11,069 bytes)

12. RE: Octane and altitude ratios??? (score: 1)
Author: "Reynolds,John" <JOHNR@mail.nwmissouri.edu>
Date: Wed, 5 Jul 2000 16:10:48 -0500
That's what I thought (regarding the higher octane in a newer car with a knock sensor); however, that doesn't apply when the octane is boosted with Ethanol - I actually get lower gas mileage on my 9
/html/mgs/2000-07/msg00160.html (12,435 bytes)

13. RE: Octane and altitude ratios??? (score: 1)
Author: Max Heim <mvheim@studiolimage.com>
Date: Wed, 5 Jul 2000 16:19:08 -0700
I believe ethanol contains less energy (BTUs or calories) per gallon than gasoline, so you are correct in noting that adding ethanol to gasoline will reduce mileage. I don't think "gasohol" is allowe
/html/mgs/2000-07/msg00171.html (13,817 bytes)

14. RE: Octane and altitude ratios??? (score: 1)
Author: David Councill <dcouncil@imt.net>
Date: Wed, 05 Jul 2000 17:43:48 -0600
This is true - ethanol contains a considerably lower energy value (BTUs - British thermal units). Ethanol also has a higher evaporative loss. Gasohol is usually a mixture of 10% ethanol in gasoline.
/html/mgs/2000-07/msg00172.html (15,148 bytes)

15. Re: Octane and altitude ratios??? (score: 1)
Author: Bullwinkle <yd3@nvc.net>
Date: Wed, 05 Jul 2000 22:07:26 -0700
My brother and I spent several hours searching for a formula that would convert sea level compression ratio, to that at a different altitude. We couldn't really find anything. We found a few formula
/html/mgs/2000-07/msg00180.html (9,843 bytes)

16. Re: Octane and altitude ratios??? (score: 1)
Author: Bullwinkle <yd3@nvc.net>
Date: Wed, 05 Jul 2000 22:40:41 -0700
The following quote is from "Mark's Standard Handbook for Mechanical Engineers" Eighth Edition on page 7-20b: "Despite alcohol (Ethyl) having only two-thirds the caloric value of gasoline, blends of
/html/mgs/2000-07/msg00182.html (8,996 bytes)

17. Re: Octane and altitude ratios??? (score: 1)
Author: "James Nazarian Jr" <james.nazarian@colorado.edu>
Date: Wed, 5 Jul 2000 22:34:34 -0600
these are the numbers that I get in Boulder. I couldn't remember them at the time so I didn't throw them in. James Nazarian 71 B Roadster 71 BGT 63 Buick 215 "Aerodynamics are for people who cannot b
/html/mgs/2000-07/msg00185.html (10,739 bytes)

18. Re: Octane and altitude ratios??? (score: 1)
Author: "James Nazarian Jr" <james.nazarian@colorado.edu>
Date: Wed, 5 Jul 2000 22:49:23 -0600
Bassically the rule of thumb is to use the lowest octane that you can without pinging. The recomendation is that number. I run low grade gas in my B here Andrew, and have no problems. If you try it a
/html/mgs/2000-07/msg00186.html (10,466 bytes)

19. Re: Octane and altitude ratios??? (score: 1)
Author: David Councill <dcouncil@imt.net>
Date: Wed, 05 Jul 2000 22:54:24 -0600
Didn't I say this stuff rocks in an email a few weeks ago? Even though I did think it would get lower gas mileage, it has been more than 20 years since I ran it in my cars, back when I lived amongst
/html/mgs/2000-07/msg00187.html (9,551 bytes)

20. Re: Octane and altitude ratios??? (score: 1)
Author: David Councill <dcouncil@imt.net>
Date: Wed, 05 Jul 2000 23:22:08 -0600
I don't think it works quite like this. I was going to do some similar calculations but then decided it was too much work to worry about. And I try to avoid getting too scientific on this list althou
/html/mgs/2000-07/msg00190.html (11,193 bytes)

Current List: 1 - 20
Page: [1] [2] [3]
This search system is powered by Namazu