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| Re: What Octane do you normally use? [message #235863 is a reply to message #235854] |
Sat, 11 January 2014 18:19   |
cadelec
Messages: 303
Registered: September 2011
Location: Brisbane Australia
Karma: 1
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where is the check box for 98 octane
Trevor
Brisbane Australia
Siesta Koala 76 Edgemont (old Bobby Moores)
71 Cadillac Eldo Convert
58 Cadillac Eldorado Brougham Project
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| Re: What Octane do you normally use? [message #235881 is a reply to message #235872] |
Sat, 11 January 2014 20:18 |
LarryInSanDiego
Messages: 336
Registered: September 2006
Karma: 0
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I run the lowest octane I can use as long as it doesn't detonate. Octane is the rating of detonation resistance only. Typically, the higher the octane rating, the lower the energy content( BTUs/gallon, etc.). Seems foolish to spend more money for a lower performing fuel that gets consumed at a faster rate. If you're not running high compression or artificially aspirated, there's no valid reason to run high octane with low compression engines. If it's detonating, that's either an engine management issue or there's carbon buildup.
The only things that'll blow up an engine (besides improper parts/assembly/clearances) are:
1) insufficient lubrication,
2) excessive speed,
3) overheating,
4) detonation/preignition
Btw, John Meaney of EFI fame tunes his 1300 hp sbc Corvette on 87 octane. Combustion chamber design of the heads he uses is a key factor.
Larry Engelbrecht
San Diego, CA
'73 26' ex-Glacier
TZE063V100319 03/07/73
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| Re: [GMCnet] What Octane do you normally use? [message #235885 is a reply to message #235865] |
Sat, 11 January 2014 21:09 |
Ronald Pottol
Messages: 505
Registered: September 2012
Location: Redwood City, California
Karma: -2
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Well, your gas is Research Octane Number (ron), ours is (r+m)/2 that's
measured octane, which is lower.
I can get 100 octane here, but it's 2x as much.
Plato seems wrong to me today.
On Jan 11, 2014 4:48 PM, "Espen Heitmann" <bimet@online.no> wrote:
>
>
> cadelec wrote on Sun, 12 January 2014 01:19
> > where is the check box for 98 octane
>
>
> And no 101 octane ?? Americans... :d
>
> Here you could get 92 octane at some stations, the normal gas we use is 95
> and 98 octane and we have some stations with 101 octane. But ok I will be
> honest, the european octan rating is about 3 points higher than the simular
> US gas and I have no idea how it is down under.
> --
> 1973 26' Parrot green Seqouia in Norway
> "Loffen" translates to white bread, it is also a nick name for your.. well
> you know..down there.. and it was my dog's name, but hey you can also call
> me Espen ;)
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1973 26' GM outfitted
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| Re: [GMCnet] What Octane do you normally use? [message #235906 is a reply to message #235885] |
Sat, 11 January 2014 23:29 |
cadelec
Messages: 303
Registered: September 2011
Location: Brisbane Australia
Karma: 1
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Senior Member |
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thanks for the clarification i have to remember that there will always be an apparent difference across the waters
| Ronald Pottol wrote on Sat, 11 January 2014 21:09 |
Well, your gas is Research Octane Number (ron), ours is (r+m)/2 that's
measured octane, which is lower.
I can get 100 octane here, but it's 2x as much.
Plato seems wrong to me today.
On Jan 11, 2014 4:48 PM, "Espen Heitmann" <bimet@online.no> wrote:
>
>
> cadelec wrote on Sun, 12 January 2014 01:19
> > where is the check box for 98 octane
>
>
> And no 101 octane ?? Americans... 
>
> Here you could get 92 octane at some stations, the normal gas we use is 95
> and 98 octane and we have some stations with 101 octane. But ok I will be
> honest, the european octan rating is about 3 points higher than the simular
> US gas and I have no idea how it is down under.
> --
> 1973 26' Parrot green Seqouia in Norway
> "Loffen" translates to white bread, it is also a nick name for your.. well
> you know..down there.. and it was my dog's name, but hey you can also call
> me Espen 
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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GMCnet mailing list
Unsubscribe or Change List Options:
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Trevor
Brisbane Australia
Siesta Koala 76 Edgemont (old Bobby Moores)
71 Cadillac Eldo Convert
58 Cadillac Eldorado Brougham Project
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| Re: [GMCnet] What Octane do you normally use? [message #235916 is a reply to message #235892] |
Sun, 12 January 2014 04:55 |
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Loffen
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
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Yes Rob you are right and I was not so far off when I said "the european octan rating is about 3 points higher than the simular US gas" , from wiki :
Difference between RON and AKI
Because of the 8 to 10 point difference noted above, the octane rating shown in Canada and the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. This difference is known as the fuel's sensitivity,[4] and is not typically published for those countries that use the Anti-Knock Index labelling system.
1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green,
And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel
in Norway
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