Quote:
Originally Posted by Formulajones
Most likely it was running too lean to begin with and ethanol exaggerated that problem.
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That's possible, and I did try to touch on it.
But as I also mentioned, back then I wouldn't have known what needed to be done to actually richen it up at all.
I don't think that the 1971 Quadrajet would have been what we might consider lean - and that carb was bone stock jetting ect.
I will say that it made for some fun "testing" with my cousin and his '71 TA;
Him: bone stock, all correct; TH400 w/3.08:1(?)
Me: as mentioned with a slight mismatch of an M22 in front of 3.55:1 gears
I had him out of the hole pretty good, but somewhere down the road, he reeled me in, probably on the merits of having taller gears.
My real take away from the ethanol blended gas (other than it being terrible for these older engines) is how shockingly smooth my car ran with 100+ octane leaded fuel - I had never heard it idle so smooth and quiet before, or since.