19.8 mpg?

[gigem75]

Since I don't have much to compare my mileage to I'd appreciate some feedback.

70T 2.2 stock, webers. Drove to Houston, mostly 4 lane, no interstate kept the r's around 36 to 38 hundred with spurts and got 19.8 mpg on a fresh engine. Is that about right?
Thanks

[jluetjen]

That sounds pretty good for a carb'd car.

[gigem75]

Thank you!

[jac1976]

That sounds pretty good...for an Aggie.

[gigem75]

I guess you know how Bevo got his name

[gigem75]

""Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving.""

that's why we used to put STP in the lever action shocks on the old MG's

[jac1976]

I assume you are speaking of the "13-0" brand the Ags slapped on Bevo. Makes for good press, but some historians report that Bevo was named a year or so before and that if UT students did convert the brand it was to an already established moniker. I have actually heard that the Ags were presented the hide with the "13-0" intact after the two schools shared in a barbeque of the steer. Who knows? Too bad that kind of ribbing (no pun intended) would outrage people these days. We'll see what this week brings...

[gigem75]

The part about the hide and bbq is legend as far as I've been able to discern anyway. This Friday.,.... well who knows. With my luck we'll probably win and Fran will get a contract extension.

[jac1976]

Ha, ha. Reminds me of the last days of Slocum, always able to pull out a late season win and extend his tenure. Even with a win of the 'Horns, I think the powers-that-be want Fran out of College Station. I have similar sentiments with our OC Greg Davis, always "saving something for the big game." Any way you slice it, this has been the most bizare college football season I can remember.

[gigem75]

I'll buy that round!

[kenikh]

Sounds about like what I got in my 2 liter 'S' at 65 MPH from CA to WA. Keep the revs down and mileage is pretty decent!

[BlueSideUp]

That sounds pretty good, I've never taken my 70T on a long trip but I think I get around 16 or so in mixed driving.

I think the carbs are due for a rebuild. When cold it spits raw fuel out of the tailpipe. Does your's do that? Maybe fuel is sneaking through the accelerator pump circuit. The mixture screws have no effect on the idle either.

[gigem75]

hey, jac, "We'll see what this week brings..." what did the weekend bring, I've been on a secret guvmnent job and missed it

Blue, that sounds pretty rich, are you sure it's raw gas coming out the tailpipe and not just mosisture?

could be the butterfly shafts are worn on the throttles, and it's sucking so much air through those the screws don't have any effect. that would make it run lean though. have you turned the mixture screws out/in to get the idle screwes in range?

This thread really helped me get mine dialed in:

71 T still backfires

[BlueSideUp]

Thanks for the link. When the engine is cold it definitely spits raw fuel out of the tailpipe. The engine runs smoothly when cold, just extremely rich. Once it warms up the fuel stops spitting out of the tailpipe but it may just be getting evaporated due to the hot exhaust.

When I first got the car running it would pop a lot more on overrun. I will try a good cleaning and check for vacuum leaks with some ether. I've tried turning the mixture screws but the idle mixture screws don't affect anything at all.

I will try to get some time and work on the carbs this week. I'll take the thread you posted down to the garage and see what I can do.

[jpnovak]

My 2.2E with webers gets almost 25 on the highway running 75 or so. this drops quite a bit around town or when I keep my foot in it. These small motors run really well and efficient when just cruising.

[911pcars]

I also think you should have much better mileage - mid 20's at least.

Here's a quick test. Remove the air filter housing. With a light source (bulb please), observe each carb throttle passage at idle. There shouldn't be any visible fuel dripping into the passage. If you see fuel, the float level is too high. With raw fuel dripping out the exhaust I'd suspect a very high float level setting. Are you sure it's fuel and not normal moisture condensation?

Start with a compression test for a base line reference point of engine condition.

Sherwood

[gigem75]

My 19.8 is on a fresh engine with only about 1k on the rebuild.

If you get the float adjuster with the shims to go under the needle and seat be prepared to sand a thou or two off one. I never could get my level between the top to lines of the cup, always just at or above or below until I sanded one down a touch. Your accelartor pump might also also putting way more fuel than required. Watch out for the brass caps above the needle and seat, those suckers can be tight, it took a half inch breaker bar on a 15mm socket to break mine loose. Pretty sure about the 15mm, but I've slept since then.

[BlueSideUp]

Whoa yeah I don't get anywhere near the mid 20s but when talking to Paul Rodelo about his 2.2T with PMOs he also stated he gets high 20s on the highway.

I'll do some cleaning and testing this week. I'm sure I should rebuild the carbs and replace the intake/riser gaskets. Maybe that will be the January project.

[gigem75]

I think I'll try blasting over to Shreveport on i-20 for a constant speed and check that. My 19.8 was going to Houston through all the little towns, some with loops some with stoplights along the way.

[haycait911]

my webered 2.7 gets about 16 mpg mixed driving, mind you, my right foot is noticeably heavier than my left.