Posted on 05/10/2022 11:16:16 AM PDT by Red Badger
It's not demand as much as situations require it. Our roads are outdated, some by nearly a century, and if you can't accelerate quickly, you're going to get struck.
Most any carbureted OHV V8 can run about 16 to 1 at cruise on level ground no problem, with good ignition and good distributor curve. It will need to run maybe 12 or 13 to 1 under load or acceleration.
One thing it won’t do, and I suspect the case here, it will definitely NOT pass smog testing. That was one of the tragedies of Detroit and the federal regulations. They de-tuned the engines by retarding the ignition timing, valve timing, lowered compression, etc, all in the effort to reduce NOX. It worked, but cut fuel economy in half, made them run excessively hot. Right in the middle of an Oil Embargo and monetary inflation and devaluation.
Oil ran about $2 a barrel for maybe 20 years. Then it rapidly went to $9
Yeah, this seems like a lot of effort for something that could have been attained far more easily.
Those seeking lower burn rates (at the expense of power) would disconnect the secondaries on their four barrel carburetors and change out jets with narrower ones. Cubans really refined adjusting carburetors to save gas.
Thunderhead 289, Uncle Luke...
Lean fuel mixtures under load, under acceleration, is where stuff starts burning up.
No problem at cruise, on level ground. Very few understand this concept today, not too many did back then.
A lot of auto mechanics had a good side gig re-tuning Ford pickups back in the day. Chief complaint was their brand new pickup couldn’t haul a horse trailer.
One of the big bugaboos was “smog” camshafts. Degreeing the cam would show 4 or 5 degrees retarded valve timing. Now another characteristic is what are called manufacturers tolerances. In some cases, you’d get maybe a mis-ground camshaft, add in tolerance “stackup”, chain stretch or wear, and find the valve timing 15 or 20 degrees retarded. Damn thing won’t even get out of its way
Music to my ears❣🥰
Pitter patter my heart ❤
I have owned 2 Ford GTs, and 2 Cobras, I am aware of AFR, etc.
;-)
My 75 Vette just got a new Edelbrock Performance intake and Edelbrock AVS2 carb... I’m getting 9mpg... Whooohooo
Stay inside with Covid for almost 2 years resulted in this? I love it!
Until it burns a valve or piston from running lean...
5.0l @6500rpm is moving ~600cfm air
Back in the late 60s, one of my frat bros had a 144 ci Ford Falcon with a 1-bbl. We made a “restrictor plate” of about a half inch diameter and slipped it under the carb.
Car ran perfect but only would go about 40mph. Eventually we had to tell him. I guess we were about two decades ahead of Nascar.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.