RR71RR
Active Member
I just bought a 71 RR. Stock 383 Automatic. I’m not sure what gas to put in it. Super or reg unleaded. Do
I add a Lead substitute?
I add a Lead substitute?
Depends on if your heads were rebuilt with hardened valve seats for unleaded fuel or not.
Yes....I agree. For an occasional use vehicle pump gas will be just fine. Re ethanol blended fuel....if you`can find fuel WITHOUT ethanol...great....if not use a good high octane fuel. Ethanol has approximately half the BTU value of gasoline and may require carb to be rejetted slightly richer, depending on the percentage of ethanol in the blend. Ethanol also csuses problems....mainly evaporative and lower MPG. IMO......DO NOT USE ANY OF THE LEAD SUBSTITUTES AS THEY USUALLY CONTAIN A MANGANESE BEARING COMPOUNDS, Which, when combusted, will shorten spark plug life ......just a thought.....71 could have 906 or 346 heads, and as said it takes awhile to sink the valves, unless you're putting on 12-15000 miles a year.
Mark
how's the liar and who's the truth teller??
MORE !I just bought a 71 RR. Stock 383 Automatic. I’m not sure what gas to put in it. Super or reg unleaded. Do
I add a Lead substitute?
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One could add the same aggregate compounds as the three witches added in the cauldron in the rhyming couplet from Shakespeare's play, Macbeth, chanted by the supernatural three witches.or you could add mashed bananas or pureed horse ****.....but....WHY WOULD YOU WANT TO???? Just my opinion of course....I’m gonna throw out the use of TC-W3 rated 2-cycle oil or Marvel Mystery Oil at a ratio of 1oz to 5 gallons of gasoline. Good for lubricating the internal carburetor parts and valves.
Pretty much sums it up, right there.NO to additives and YES to ethanol free
....because the garbage gas available now is much poorer than what was available then, and what that car was designed to run on.One could add the same aggregate compounds as the three witches added in the cauldron in the rhyming couplet from Shakespeare's play, Macbeth, chanted by the supernatural three witches.or you could add mashed bananas or pureed horse ****.....but....WHY WOULD YOU WANT TO???? Just my opinion of course....
BOB RENTON
Back in the day its was said that old 30s cars like the Ford Models A could use any combustible fuels... like fuel oil............ The compressions were so low and you could retard the spark from steering columns like the model As & Ts for a hotter ignition spark.Well, there were only two engines that maintained somewhat high compression in 71 and the 383 wasn't one of them.....and I'd say run it on your local gas but treat it with fuel stabilizer which helps keep the fuel last longer. If your engine pings on your local fuel, then you'll need to add something to the fuel or back off the timing until it doesn't ping. Don't know how old you are but us old farts don't hear pinging engines so much anymore unless they are pinging their asses off!