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Author
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Topic: Can I get away with running 94 octane in my 351c?
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70coupe
Gearhead Posts: 357
From: Toronto,Ontario,Canada
Registered: Aug 2000
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posted 05-01-2003 11:06 AM
  
I went through the search option and I'm still not quite satisfied. I have a 351c with closed chamber heads and flat tops (around 10.5:1). My cam is Crane solid .570/.590 with 246/256 duration @.050
Now, with about 71 degrees overlap should I be able to run on pump gas (94 octane)?
I would like to try it with 32 degrees timing and go up to 36 max. to find out the results. I'm currently running 100 octane with 39 total.
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bluestreek
Gearhead Posts: 1289
From: Athens,GA
Registered: Jul 2001
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posted 05-01-2003 11:17 AM
Last 351C 4V chassis dyno showed most power at 34 degrees with 93 octane.Hope this helps ------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
2nd pass: 12.11 @ 114 mph (7.80 @ 92 mph)
DanH
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denny
Journeyman Posts: 57
From: Northfield NH USA
Registered: Jul 2000
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posted 05-02-2003 05:44 AM
I have a very similar speced Cleveland and it made its best power with 34 deg. timing It didn't like 94 octane though.------------------
D French
67 427 Fairlane(A/SA) 73 Mustang 351c
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clevelandstyle
Gearhead Posts: 638
From: Connersville, IN
Registered: Jul 2001
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posted 05-02-2003 11:42 PM
My cleveland has closed chamber heads and flat tops. My cam is very close to the one you have. I have calculated the compression at 10.26:1 and I run 93 octain pump gas even when I race. I run 36* advance and have had no signs of detination.
You should be fine.
I have tried racing gas and gained nothing at the track. ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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popeye
Journeyman Posts: 84
From: midwest USA
Registered: Dec 2002
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posted 05-07-2003 01:19 AM
70coupe have you ever tried 104 super octane booster? We used it with 93 oc.Ammoco with very good results.With no octane booster it pinged like crazy,alot cheaper than race fuel too.popeye ------------------
This is FORD COUNTRY, where on a quiet night, you can here a chevy rusting
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