 Octane |
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| Bulldog9 |
 Feb 2 2016, 10:33 AM
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Senior Member  Group: Members Posts: 705 Joined: 21-August 13 From: United States Member No.: 16,283 Region Association: MidAtlantic Region  |
Lets talk Octane..... What is the consensus on grade of fuel? I'm running 96 x 71 bore & stroke with .060" deck height 58.8cc chambers in the heads, and flat top pistons with no valve reliefs, and figure my CR is around 8.6:1. I'm thinking I can run regular, but no idea.
I've been running Chevron 92 so far, but dont want to wast $ and leave unburnt fuel residue. The higher the octane, the more resistant the fuel is to combustion, so unnecessary use of 'hitest' is dirtier combustion wise than regular. I haven't done any experimenting yet, but wanted to get some experience before I do. I plan to run the current tank down to close to empty, then put in 5 gallons of regular and see how that goes, but just wondering. |
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| bretth |
Feb 4 2016, 08:00 AM
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Senior Member Group: Members Posts: 899 Joined: 23-June 15 From: Central TX Member No.: 18,882 Region Association: Southwest Region |
Is it usually only the 91 octane that comes as ethanol free? From what I am seeing on the pure-gas.org site so far they are all listing 91 octane in the 'details' section.
Brett |
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| DRPHIL914 |
Feb 4 2016, 11:17 AM
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Dr. Phil Group: Members Posts: 5,830 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States 
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QUOTE(bretth @ Feb 4 2016, 09:00 AM)  Is it usually only the 91 octane that comes as ethanol free? From what I am seeing on the pure-gas.org site so far they are all listing 91 octane in the 'details' section. Brett our ethanol-free "marine gas" sold here is 87 octane so that is what i put in the 914. today its $2.15, same price as premium 93 octane at the same station. Our regular gas just today hit $1.59 btw |
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Posts in this topic
Steve Pratel Octane Feb 2 2016, 10:33 AM
Mikey914 With that compression you should be able to run re... Feb 2 2016, 10:59 AM stugray Altitude also matters.
The higher the alt. the low... Feb 2 2016, 11:24 AM Tom_T Steve -
My 88 Westy WBX-4 with Digifont is a deve... Feb 2 2016, 03:52 PM Steve Pratel Great, thanks guys. Now I just need to find the ... Feb 2 2016, 05:05 PM 80cap I think the better thing to consider is that ethan... Feb 2 2016, 05:27 PM Ansbacher My '74 2.0 L with dual Dellorto carbs loves 90... Feb 2 2016, 05:48 PM 914_teener
Lets talk Octane..... What is the consensus on gr... Feb 2 2016, 06:41 PM
Steve Pratel
Lets talk Octane..... What is the consensus on g... Feb 2 2016, 07:24 PM jim_hoyland Speaking of Ethanol; manufactures of AFR gauges an... Feb 2 2016, 06:51 PM Mark Henry Anything above stock CR you likely should move up ... Feb 2 2016, 08:03 PM carr914 E-Free! :headbanger:
http://www.pure-gas.or... Feb 2 2016, 07:25 PM Steve Pratel
E-Free! :headbanger:
http://www.pure-gas.o... Feb 2 2016, 07:29 PM somd914 Ethanol-free... Only a dream here in Maryland. O... Feb 2 2016, 08:39 PM gfg3
Ethanol-free... Only a dream here in Maryland. ... Feb 3 2016, 04:23 PM Mark Henry The one thing I've wondered about is if you re... Feb 2 2016, 09:00 PM 914_teener
The one thing I've wondered about is if you r... Feb 3 2016, 12:11 AM Mark Henry
The one thing I've wondered about is if you ... Feb 3 2016, 10:25 AM Madswede
[quote name='Mark Henry' post='2297644' date='Feb... Feb 3 2016, 11:53 PM 914_teener
[quote name='Mark Henry' post='2297644' date='Fe... Feb 4 2016, 09:44 AM Dave_Darling If you're running a stock mild, mild, mild cam... Feb 2 2016, 10:12 PM r_towle I run cheap gas in everything I own.
Audi, 914s, 9... Feb 2 2016, 10:20 PM GregAmy I'm no chemist (and I don't play one on TV... Feb 4 2016, 10:54 AM Mark Henry
You're far better off finding a local suppli... Feb 4 2016, 12:02 PM Madswede
I'm no chemist (and I don't play one on T... Feb 4 2016, 10:08 PM |
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