Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - 1955 Pontiac (advice for setting efficient but driveable mixture?)

slowmover · 03-18-2014, 12:45 PM

As to engine tuning stick to the GM recommendations of the period, IMO. "Best lean roll" is what I went for on my old Chryslers. The final carb adjustment was done in gear, at idle, and resting bumper against tree. (I wrote up an explanation an eon ago, here: Idle Speed Question")

I'd be more concerned with wheel bearing and brake adjustment all around. As well as looking for steering gear slop. Alignment needs be spot on.

If they can be found, articles on the old MOBIL Economy Runs of the era (one of the MoPar magazines; 1990's, IIRC) had quite a bit of info on how those drivers could achieve extraordinary FE.

A tach and a vacuum gauge on dashtop will provide enough info for consistency. Something this age undergoing a really long drive needs be more concerned with actually completing the trip versus a small fuel savings. FE is a measure of soundness, not savings, per se.

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03-18-2014, 12:45 PM	#23 (permalink)
slowmover Banned Join Date: Oct 2009 Location: Fort Worth, Texas Posts: 2,442 2004 CTD - '04 DODGE RAM 2500 SLT Team Cummins 90 day: 19.36 mpg (US) Thanks: 1,422 Thanked 737 Times in 557 Posts	As to engine tuning stick to the GM recommendations of the period, IMO. "Best lean roll" is what I went for on my old Chryslers. The final carb adjustment was done in gear, at idle, and resting bumper against tree. (I wrote up an explanation an eon ago, here: Idle Speed Question") I'd be more concerned with wheel bearing and brake adjustment all around. As well as looking for steering gear slop. Alignment needs be spot on. If they can be found, articles on the old MOBIL Economy Runs of the era (one of the MoPar magazines; 1990's, IIRC) had quite a bit of info on how those drivers could achieve extraordinary FE. A tach and a vacuum gauge on dashtop will provide enough info for consistency. Something this age undergoing a really long drive needs be more concerned with actually completing the trip versus a small fuel savings. FE is a measure of soundness, not savings, per se. .