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Retarding timing and mileage

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Old Apr 30, 2002 | 06:49 PM
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Retarding timing and mileage

I'm trying to squeeze every mpg out of my 390 I've got in my 75 f250. The engine is slightly hopped up and I had it set and 12 btdc and 38 total which the engine is really happy at. If I retarded it to somthing like 8btdc (I think the book calls for 6) will that improve my gas mileage or was that originally just for emissions? Thanks guys.
 
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Old Apr 30, 2002 | 06:52 PM
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Retarding timing and mileage

Put it back to 12. The late burn was for reducing NOx.

Barry

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Old Apr 30, 2002 | 07:07 PM
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Retarding timing and mileage

maybe if you lean it out ever so slightly that might improve your gas milage. also a good tune up, a carb cleaning and a topper will help your gas milage!
 
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Old May 2, 2002 | 04:01 PM
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Retarding timing and mileage

Yea, I thought it might just be emissions so I'll leave it at 12. I'll lean it out a bit tho, I have it fat for power but these gas prices are killing me!
 
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Old May 2, 2002 | 06:08 PM
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