What's your Weber carb gas mileage ???

[xirdneh]

Is anyone getting more than 25 MPG with a Weber carb on a 3A engine?
If so what is your set-up?
I have given up on trying to get a 32/36 DGEV to consistantly get over 25MPG
After talking to several local carb specialists I doubt its even possible?
Will someone prove me wrong? Please

[ARCHINSTL]

Being an anal person, I've kept track of every tank since I got her in 2005 - true!
My OE Aisin (rebuilt) carb was all over the map, from 22 to 33 MPG.
Since 2008, with the installation of the Weber, the MPG has been pretty much 26 to 29, with the average being about 27. Sometimes during the Winter it drops to 25 MPG - but not always. I've gotten as high as 33 MPG, but could never figger out why.
Most of STL is at 660 feet in elevation. I rarely drive over 65 MPH, and 90% is suburban driving.
When I got the carb, I told the vendor about the elevation and was told I would get the correct jets. Personally, I doubt it, but have never checked them and am content with the MPG and, being retired, I only drive Goldie only about 3K+ miles per year (have a p'up, too).
Tom M.

EDIT: On reflection, I blame the wide variance of MPG with the rebuilt Aisin on the emissions system, worn out as it was, which was THE reason I switched to the Weber in late '08. I would also note that the carb in the car when I got her (OE?) gave an even wider variance (dropping as low as into the teens ), whence buying the rebuilt one in late '05.

[splatterdog]

"Out of the box" on T4 #1 was usually 30ish with an all time best of 34.8. Gained about 7-8 mpg over the stock carb on that one. Wife was putting on lot's of miles back then, and the carb paid for itself in a hurry.

Usually I'm flogging all 62 horses, but still never worse than high 20's. Unless it's brutal cold and gets a lot of idling.

The "jetted" weber does about the same.

[xirdneh]

You guys need to list the carb number (on driver side base) and jetting along with your approximate elevation for this to be usefull

[xirdneh]

I consistently get 29-31 mpg with GOOD stock carbs during summer months. I check mileage every time I get gas, on every tercel I have messed with over last ten years.
The key word is "good". If the carb is not getting that milege I replace or rebuild it.

[Petros]

I drove a weber equiped T4wd from the Dallas area to home in the PNW, about 4000 miles. It was jetted poorly and only delivered 22-24 mph hwy. I was able to rejet it when I got it home, it ran better but I never had a chance to check fuel economy after the change.

I have driven perhaps 8 stock Tercel4wd cross country with stock carbs, all of them except one got between 28 and 34 mpg, most in the 30-31 range. On high speed runs across the TX desert at 80 mph the economy would drop to about 26-27 mpg (I think that speed is just too much for the 3ac).

One time a bad distributor caused about 24 mpg, fixed after I swapped it out with the one in my kit. Another time one had the wrong carb, vac lines connected badly, but economy did not improve after I swapped in the correct carb, adjusted it, and checked the timing. I suspect it may have had the timing belt off a tooth, but I did not have a chance to check that when I delivered the car to the new owner.

[teranfirbt]

With careful driving I was getting around 31 with my old Weber, usually closer to 29. I did get 36 once with a massive tail wind going down the Rockies.

[ARCHINSTL]

See EDIT on my OP above.
Tom M.

[mrdance123]

Nobody's going to believe it,
but during my 270 mile drive towing another rescued T4,
I got 27 mpg, going 45-60 mph.
The tanks immediately before and after the tow gave me expected mileages,
so a miscalculation resulting from incomplete fill-ups did not inflate calculation.
There was an elevation drop of about 2000 ft helping out.
I keep gas receipts and log them in spreadsheet,
lifetime average mpg driving Speedy Blue is 36....
it's almost all medium range in-town driving, 5-15 mile trips,
averaging mostly 30 -45, never exceeding 60 mph...
but i'm a hypermiler (google it), not a normal driver,
so my mileage actually worsens on highway speed road trips.

[xirdneh]

Nobody's going to believe it,
but during my 270 mile drive towing another rescued T4,
I got 27 mpg, going 45-60 mph.

was that with a weber carb?

[xirdneh]

With careful driving I was getting around 31 with my old Weber, usually closer to 29. I did get 36 once with a massive tail wind going down the Rockies.

was that a 32/36 weber?

[teranfirbt]

Yep, 32/36. I wish I could remember the jetting, but the carb was sold a long time ago. I seem to recall 140 on both main jets, and I think 60's in the idle jets. Emulsion tubes were whatever was in the carb, same with the air jets. I had a wide band O2 sensor installed, it ran fairly lean at cruise but went too rich if I opened up the secondaries. Running around town when I was in school usually got me around 23 mpg, but that was basically all city and I don't go easy on the go pedal.

Lately I've been getting 29ish mpg commuting with the 4AFE, that's about 60% highway. If I keep it under 65 it'll get 32 highway.

[xirdneh]

i was gettting 23 mpg for all around driving with 32/36 carb and 140/140 jets and it ran poorly going up any hill

[Mark]

I have 2 Tercels (and '81 sedan and an '84 4WD wagon) with the same engines and the stock carbs. The smaller, lighter sedan had worse fuel economy by about 3 mpg. It didn't have a catalytic converter. My wagon did. About a year ago, since the cat was rusted through in places, I removed it and it was pretty clogged with black soot. Now without the cat, the wagon gets similar poorer fuel economy as the sedan. It does have a bit more power than it used to on highway uphills though. Anyway, comparisons of carb types/jets and different fuel economies may have nothing to do with the carbs themselves in some cases, but instead the state of the catalytic converter. I found that a plugged cat can increase the fuel economy (maybe by lowering the airflow through the carb at a given throttle position compared to the unrestricted airflow of a missing/new cat).

[xirdneh]

the car i had been testing with the weber had no cat conv