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11-23-2012, 11:23 PM
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#1 |
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Registered User
Join Date: Jun 2012
Location: Rathdrum, Idaho
Posts: 305
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Octane rating for 292?
I have been having some rattling under load that sure sounds like low octane. What do you guys run in your I-6's?
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11-23-2012, 11:33 PM
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#2 |
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Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Octane rating for 292?
Could also be timing. Octane stuff usually is high compression stuff, like if you were running a 12/1 motor you would need a higher octane. I'm sure someone out there knows a lot more about this than I do.
__________________
66 shorty 
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11-24-2012, 01:17 AM
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#3 |
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Registered User
Join Date: Feb 2010
Location: Los Banos, CA
Posts: 390
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Re: Octane rating for 292?
CR is 8:1 or so , so regular gas is plenty for that motor. You probably have a non working vacuum advance and have it too advanced...
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11-25-2012, 11:37 PM
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#4 |
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Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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Re: Octane rating for 292?
...and it can quickly burn holes in piston tops...
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11-27-2012, 09:06 PM
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#5 |
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Registered User
Join Date: Jun 2012
Location: Rathdrum, Idaho
Posts: 305
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Re: Octane rating for 292?
As of today I have retired my truck from DD service. I opened up my distributor and the vaccum advance looks rusty to me. It wasn't new when I got it. I think I am going to look at that as a possible cause. I am glad I don't have the pressure of using it for my main transportation anymore.
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11-27-2012, 11:28 PM
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#6 |
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Registered User
Join Date: Jun 2006
Location: MO.
Posts: 970
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Re: Octane rating for 292?
all you have to do to determine if the vacuum advance is working is look under hood while engine is running and crack the throttle open while looking at the vacuum advance and you should see it moving
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11-27-2012, 11:30 PM
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#7 |
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Registered User
Join Date: Jun 2012
Location: Rathdrum, Idaho
Posts: 305
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Re: Octane rating for 292?
Isn't the vacuum advance under the distributor cap?
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11-28-2012, 08:19 AM
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#8 |
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"Where were you in '62?"
 
Join Date: Jul 2004
Location: Cleveland County, North Cackalacky
Posts: 5,013
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Re: Octane rating for 292?
__________________
PROJECT: "FULL METAL YELLOW JACKET" 1962 Chevy C-10 Stepside Shortbed Nostalgia Pro/Street Pickup Truck PROJECT: "FULL METAL YELLOW JACKET Build Thread What Are You Workin' On? - 1Bad62ChevyPickup PROJECT: "TYRANNORAMBLER REX" 1969 AMC Rambler American Nostalgia Pro/Street Youtube Channel: Father Son Projects Youtube Channel: 2TIMOTHY2FITHTEEN  "North and South Carolina Folks Click Here!" (((( ~ I have Parts For Sale & Miscellaneous Stuff ~ )))) "Well being as there's no other place around the place, I reckon this must be the place, I reckon...Nyuk Nyuk Nyuk" -Curly Howard Ph.D. |
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11-28-2012, 08:57 AM
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#9 | |
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Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Octane rating for 292?
Quote:
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer Last edited by 1963c-10; 11-28-2012 at 09:02 AM. |
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