 Just got back from maiden voyage 12.37 mpg! [message #97692] |
Sun, 29 August 2010 01:50  |
tze73
Messages: 13
Registered: August 2010
Location: Montreal, Quebec
Karma: 0
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Hi all,
We have had a 73 sequoia 260 for about a year now with a Dick Paterson built 455 with 60,000 m on it. Went camping for the week before school starts, maiden voyage after major tour of mechanicals and got amazing fuel economy. We did some city and rolled at 55-70 mph. I was hoping for 10 but this is incredible. Previous owner was clocking 8.3 I cant believe it. This is what i think contributed to these numbers.
-rebuilt the transmission with parts from a diesel torque converter and parts from a 67 switch pitch. ~ 1100 stall original 3.08 gearing.
- re-curved distributor with heavy weights and light springs and adjustable vac advance
- cut 3 loops off quadrajet power piston spring.
- full 6 wheel suspension and brake job with 6 wheel alignment. (rear bushings, relay arm, idler arm, ball joints, rear torsion bars).
- took off three max air vents on roof. there is no air conditioners.
Not only that, it handled like a dream, rock solid on ruts and crappy Quebec back roads.
I had plans to put a Chev tbi with megasquirt but I am afraid to touch anything. What kind of numbers are you all getting?
Cheers,
Keith
[Updated on: Sun, 29 August 2010 09:25] Report message to a moderator |
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| Re: Just got back from maiden voyage 12.37 mpg! [message #97699 is a reply to message #97692] |
Sun, 29 August 2010 08:49  |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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how many tanks of fuel did you burn on the trip? the tanks are very hard to fill equally on each fill up so mileage will vary from tank to tank. i get 6 to 11 on trips and have to average it all out at the end.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: Just got back from maiden voyage 12.37 mpg! [message #98597 is a reply to message #97704] |
Sun, 05 September 2010 02:03 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| tze73 wrote on Sun, 29 August 2010 09:24 |
Its in US mpg. We only burned one tank so maybe its due to unequal filling. I think we might have to do another trip to find out 
Keith
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I have kept detailed mileage records for many years on several vehicles. I have found that it takes calculating the MPG over 5 fills to get a represenative MPG figure.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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