Author Topic: Non ethanol gas in a 352  (Read 969 times)

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winr1

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Non ethanol gas in a 352
« on: October 19, 2020, 06:56:08 PM »
Drained old gas and put in 7 gallons on non ethanol gas from Buccee's

Pump said 91 regular
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EDIT:   I think Shell regular is 87 .....Been running regular from Shell, was running great with 12 BTDC

With the non ethanol I had to crank the timing to 20 BTDC

Runs great, starts fine, no ping in hi gear at 25 MPH with pedal to the floor

352 is original to the 65 F100, factory pistons, heads are C0 and C1 ( machine shop switched heads on me 25 years ago )

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Had a 67 Barracuda with an 8 to 1 360, filled it up with av gas and had to crank timing way up just to get home


Am I wrong in thinking the Buccee's gas is higher octane than the Shell regular or is the ethanol diluting the Shell regular perhaps ??



Ricky.
« Last Edit: October 19, 2020, 10:49:13 PM by winr1 »

GJCAT427

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Re: Non ethanol gas in a 352
« Reply #1 on: October 21, 2020, 08:19:05 AM »
I`m not sure if the octane ratings are acurate or not. The non ethanol gas around here runs from 91 to 93 octane. I try to keep 92-93 in my 427 in my 56 F100. It seems to run fine. Hell even my weed wacker runs good on the higher octane stuff.

Falcon67

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Re: Non ethanol gas in a 352
« Reply #2 on: October 22, 2020, 11:29:03 AM »
There's no "non-ethanol" around here anywhere and 91 it the most you can get at the pump.  Depending on the tune up, 91 works but it's crappy fuel, very sooty. I mix usually 50/50 with VP110 to stabilize it for the 10.5:1 engine.  The 9.5:1 302 runs fine on the pump, timing locked at 36.  Ethanol like methanol carries oxygen (not as much 35% vs around 50% for methanol) so there's no particular reason it'd need less timing.