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Effin 1990 Ford F250. 460 motor
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<blockquote data-quote="swampratt" data-source="post: 4359250" data-attributes="member: 15054"><p>If you get a distributor that you can play with advance curves and get a carb you can make a quick timing curve and tweak that carb and get really good MPG.</p><p>99% of the time I filled up my carbed 306" ford engine in my 6000 lb 1984 ford full size van I got either 16.7 or 17.6 MPG not using any overdrive but the trans was an overdrive AOD and 3.55 gears.</p><p></p><p>I built it expecting 20+ MPG but that little engine was down on compression with the smogger 1982 heads.</p><p>Really wish I had some old small chamber 289 heads to stick on it when I built it.</p><p></p><p>Pulling trailers or one of my boats or empty it got better mpg than my buddies 2012 5.3 chevy truck and better than my boys 2013 truck with the same engine.</p><p></p><p>If you are getting 12 MPG from that 460 with the fuel injection I would be tempted to keep it.</p><p>12 is what I got from a 454" I tweaked in a 1 ton dually Chevy with granny 4 speed and 4.11 gears.</p><p></p><p>My 1980 400" ford 3/4 ton truck I could only get to 12.5 MPG but I ran a 500" 2 barrel Holley on it.</p><p>Pretty big primaries on that one.</p><p>Those 34" tall mud and snow tires do not help matters either.</p></blockquote><p></p>
[QUOTE="swampratt, post: 4359250, member: 15054"] If you get a distributor that you can play with advance curves and get a carb you can make a quick timing curve and tweak that carb and get really good MPG. 99% of the time I filled up my carbed 306" ford engine in my 6000 lb 1984 ford full size van I got either 16.7 or 17.6 MPG not using any overdrive but the trans was an overdrive AOD and 3.55 gears. I built it expecting 20+ MPG but that little engine was down on compression with the smogger 1982 heads. Really wish I had some old small chamber 289 heads to stick on it when I built it. Pulling trailers or one of my boats or empty it got better mpg than my buddies 2012 5.3 chevy truck and better than my boys 2013 truck with the same engine. If you are getting 12 MPG from that 460 with the fuel injection I would be tempted to keep it. 12 is what I got from a 454" I tweaked in a 1 ton dually Chevy with granny 4 speed and 4.11 gears. My 1980 400" ford 3/4 ton truck I could only get to 12.5 MPG but I ran a 500" 2 barrel Holley on it. Pretty big primaries on that one. Those 34" tall mud and snow tires do not help matters either. [/QUOTE]
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Effin 1990 Ford F250. 460 motor
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