| [GMCnet] MPG [message #271777] |
Thu, 12 February 2015 06:54  |
Advanced Concept Ener
Messages: 112
Registered: December 2014
Karma: 0
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Senior Member |
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I had a 78 Royale, 403, holly FI, headers, twin mufflers, 3" exhaust, 307 drive, Torker cam, eddlebrock high rise, K&N remote filter, O2 feedback on FI, 16.5 radials,ACEL ignition components that averaged 11 MPG. That was in 1992 with 50K miles on coach.
Jon Darcy ACES
76 stretch, flares, 4 bag, Alcoa's, bunkhouse
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| Re: [GMCnet] MPG [message #271796 is a reply to message #271777] |
Thu, 12 February 2015 09:38  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I got 12 out of my box stock 23' >once< coming from Asheville to Braselton (pretty much all downhill) using no alcohol gas without the toad on cruise at 58-60 mph. Haven't equaled it since, nor do I expect to. I was trying on that run. With the toad and normal operation, 8.5 to 9.5 depending the route. Without, it will sometimes touch ten, usually 9.75 or so. Alcohol in the gas knocks 5 - 10% off the mileage. I usually use pure-gas.org to plan my fuel stops, it doesn't like alcohol in the Southern summers at all.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] MPG [message #271816 is a reply to message #271796] |
Thu, 12 February 2015 12:26 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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Senior Member |
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We averaged 10 on our trip to Quartzsite last month. 1600 miles, no toad, 403 with 3.55' and headers running 64 on cruise most of the time. Little wind either direction (for a change).
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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