I'm averaging 32 with a well tuned megasquirt conversion. gotta love it!
_________________
'74 2002 (undergoing Megasquirt conversion!)

my 01 Z3 3.0i is getting better gas mileage than
my '02. = THE Z3 ALWAYS WILL -
AND Z4 - BOTH z's are the MPG leaders of all the
USA BMW models - up to 30 mph on highway
(light foot)

My 02 is getting 15 to the gallon! = NORMAL FOR CITY STOP N'GO
25 - 30+ ( THE 30+ is for tii 's) HIGHWAY


I'm not too happy with that. = WHO IS ? NO WHINNING


I was expecting a small weber carb 4 cylinder to
atleast get 22 to the gallon so I could park my z3
and drive it on weekends. = ANY
CARBURETOR IS JUST A CONTROLED GAS LEAK - FUEL
INJECTION IS PRECISE METERING OF GAS TO
AIR AND TIGHTLY CONTROLED COLD START,
WARN-UP, AND WARM RUNNING, FUEL SHUT OFF
ON COASTING

Do the Plugs and wires really make an improved
difference for positive effeciency? = YES

Is my Carb tuned way too rich? = YES

I have the pointless ignition with the power and
economy switches that connect off it and they
don't make a difference from what i've discovered.
= THEN IT'S A KRAP SYSTEM - GO
BACK TO POINTS AND SET IT AT 1,500 RPM USING
A TIMIMG LIGHT

Could it be something as traditional as the Carb being
all gunked up and needing to be rebuilt? = YES


Another question. What do you guys think about
the fuel injection conversion kit for them I am r
unning a Metrics 2200 under the hood. =
SEE ABOVE ANSWERS, BUT WHY DO THAT TO A
SIMPLE RELIABLE CAR - DO YOU WANT MORE
AGRAVATION, ADJUSTMENT, DEFECTIVE
ELECTRONICS, ADD COST?


I appreciate any feedback and solute you for
reading this giant novel. = WELCOME

Keep the rubberside down! = I ALWAYS
DO - AND SOMETIMES THE LEATHER SIDE ALSO

CHEERS MATE

_________________
1976 BMW 2002 #2743711(sorry I sold it 12/25/06)
1986 BMW R65 650cc twin 19k miles
1964 BMW R27 250cc single 15K miles
2002 BMW 325xiTouring 29k miles
1984 MERCEDES-BENZ W123 300D Turbodiesel-188k miles fein-DIESEL


Last edited by c.d.iesel on 6-13-08 01:18; edited 1 time in total

Anyone have any idea what a megasquirted 1600 would get?
_________________
Patrick Sloan


67 1600
90 325is
04 Audi A4

I have to disagree with you on the Z3/4 being most efficient american gas mileage cars. While lightly feathering the gas on a trip to eastern washington with miles of flat level highway, I was getting 22 to the gallon. Now in the city i'm avergaing 19. But I appreciate the power from that 3.0i completely, so now it's just focusing on my '02. I will get new plugs and wires for it, and see what I can do with the carb even though I grew up knowing fuel injection and non of that ancient carburator crap. If all these other guys are saying they are getting 25 to 30 a gallon than there's something big going on with mine. I'm simply going to throw new plugs n' wires at it, and get the carb rebuilt.

Oh, and what's this Mega Squirt thing all you guys are talking about?
_________________
75 2002 Metric and Z3 3.0i

Actually I can get better around town and highway mileage with my 02 M Roadster than my 74 2002, provided I drive with a light foot. I quite often manage 24 to 26 MPG around town and around 28 on the highway. When I put my foot in it and all six throttle bodies open up and I drive agressively it can drop into the low teens....but it sure is fun.

Earl

Actually I can get better around town and highway mileage with my 02 M Roadster than my 74 2002, provided I drive with a light foot. I quite often manage 24 to 26 MPG around town and around 28 on the highway. When I put my foot in it and all six throttle bodies open up and I drive agressively it can drop into the low teens....but it sure is fun.

Earl

S/B 28.2 on the 2002,2002A,2002Ti
28.5 for the Tii

11-0/3 Band 2 of the repair manual
_________________
73 Tii. My Daily driver
Volvo V70 Turbo,Wagon

Ad Deum Per Fidem Mores Culturam

22-24 on a carbed 2002 is pretty good. 275-300miles per tank full (12.5 gallons)

The problem with 2002's in the "new smog erra" is that they were all screwed up to meet smog. Supper rich idle circuit to produce unburned gas to keep the fires lit in the air-pump filled exhaust. Completely insane by any standard but unbelivable today.

For you I would pop out the jets, main and Idle, and do some majore down sizing. Buy three set of each main jet one step smaller each. Get 2 smaller size Idle jets one set each. Check your float levle and clean out all the ports. reassemble run the car and see if you see any leaks. Insert smaller jets in progression one step smaller at a time and drive the car to see how it responds.

Change your air cleaner or better yet get a new K&N filter.

Make sure your advance is correct and you vacume advance is hooked up.

Good luck & have fun

I get between 22-26 mpg on an all stock system (with the Weber carb and K&N filter). I've noticed that wind and A/C make a noticable difference in the MPG of my 2002 (non ti, tii) -- if I just drop the window and drive 55-60 I get between 25-26, whereas if I run the A/C and drive 65ish (3.5k rpm) then it goes down to 21-23 MPG (all of these figures are an average of 85% highway and 15% in-town miles -- I travel the same route to and from work every day). All in all, the smile on my face is big and that is what counts.

Cheers,
Bill

How about a carbed 32/36 1600 anybody got any data?

On a tired old half worn out 120 psi compression stock 02 with 4 speed, with 3.90 or 4.10 diff in town only driving, lots of stop & go, only 20 is best I can get or expect, that's with 2 barrel solex, & I have an XR700 to replace the points. When I had 290 something reground cam & headers & XR700 with 32/36 & 5 speed with 3.64 diff, I could average 22-27, but only got up near 27 if I put more hiway miles on it per tank.
I'm looking at putting a 320i block in for a 1.8 conversion & may use that for my 1st megasquirt conversion, just for an economy minded daily driver, & of course the 5 speed & 3.64 diff will go back in with all that too. I'd also like to know the mpg of any 1600 also, just for comparison. I heard a long time ago 1600's are nice revvy 4 bangers, more so than the stock 2 liter 02's are.
_________________
2002 owner since 1980

I get maybe 20 with a lot of in- city driving-
and I'm on it whenever I can. Which isn't that often.

Quote:

Is my Carb tuned way too rich? = YES

Or too lean. The thing is, if you run too lean, the car hesitates,
so you add more throttle, and end up consuming MORE fuel
than if it's tuned to the 'best efficient' point in its VE curve...
Likewise with the timing-
and annoyingly, 'best efficient' for timing is quite dependent upon mixture.

Megasquirt can be made to have crappy economy, too.
Just depends on the tuning...

Smells like science...

t
_________________
I have a car disease. There is no cure.
I'm not even managing the symptoms very well...

I get better mpg in my Dinan 8 cylinder estate than I do in the 02. Thinking about going back to the 32/36 from the 38/38 but I ONLY THINK ABOUT IT; THUS IT WILL NEVER HAPPEN.
_________________
'75 Alpine Weiss I
'94 530iT Dinan
'66 Mustang Conv
'66 Mustang Coupe (Garage Queen)
'05 Mazda 3

I have a 1 yr old 32/36 and I went with CD's prescription on jetting. That gives me a 60 idle and 140 main. In setting lean best idle/mixture/speed according to Pat Braden's Weber Carbs and the Weber Tuning Manual (Pierce Manifolds) it is telling me to increase the size of my idle jet. I'm going to do that and once I see how that does, also try a slightly leaner main. According to the manual 60% of your driving is on the idle jets. My mileage has been 20-22 hwy running about 75mph and it is rich...obviously. Throttle response is just not crisp.

I have an AEM UEGO AF gauge that has been on the turbo that I'm going to put in teh 72. All it is in the turbo is a light show. Maybe it will do better in the 72

It is surprising no one mentioned: "YOU MILEAGE MAY VARY."

There are too many variable to state what fuel mileage a given vehicle SHOULD get. Different tires, different tire pressures, different Gross vehicle Weight (how many bowling balls in back seat or on your roof - hidden under the row boat), engine condition, dragging brakes, air conditioning on, terrain traversed, altitude, climate (Denver snow), transmission and rear drive conditions and ratios, and whether you treat your engine with Seafoam - ALL contribute to fuel economy.

Then, there is driving STYLE. This includes 1. racing to the be the first to buy Seafoam and 2. someone who should sport a bumper sticker warning "I brake often for Seafoam." Not to be overlooked, is the driving style of keeping a foot on the brake pedal just in case you see a container of Seafoam on the side of the road and need to react quickly.

Lastly, although there shouldn't be variables in the means of measuring fuel mileage, if you really do not know how much fuel you consumed for a given distance, everything else is guestimation. How accurate is the measuring odometer? How accurate is the measure of fuel placed in the tank before and after the reading?

If enough money were riding on the actual (to the gram/oz.) fuel consumption numbers reported by some FAQ'ers here, I suspect BIG revisions. Even using Seafoam does not guarantee that every drive is downhill with a tremendous tailwind.

I would like to say I get 50 mpg. I probably do when I am coasting. As might be expected, each car I drive varies. I had an automatic 02 that varied the most. In town (stop and go) 14 mpg on the highway at a consistent 70-80 mph (24 mpg). That was with a 32/36 tuned with an exhaust gas analyzer a 3.64/1 50% lsd final drive (for snow). Fuel grade would alter consumption by as much as .5 mpg.

HTH

[quote="Enrique"]It is surprising no one mentioned: "YOU MILEAGE MAY VARY."

it's because it's obvious..your rant was a waste of energy

his question was "what's the general gas mileage supposed to be on a 2002"

the best way to answer that is to give him basics,then he can evaluate his options based on what he's got. Chill....and try some more of that seafoam. it may work on your issues. Pesonal or otherwise.

HTH

why are you hiding and who will you be tomorrow?
_________________
73 Tii. My Daily driver
Volvo V70 Turbo,Wagon

Ad Deum Per Fidem Mores Culturam

[quote="Armond"]

Enrique wrote:

It is surprising no one mentioned: "YOUR MILEAGE MAY VARY." it's because it's obvious..your rant was a waste of energy his question was "what's the general gas mileage supposed to be on a 2002" the best way to answer that is to give him basics,then he can evaluate his options based on what he's got. Chill....and try some more of that seafoam. it may work on your issues. Pesonal or otherwise. HTH

I thought I tried to provide "basics" along with an explanation as to why general numbers are so ambiguous as to mean different things to different people. Based upon your characterization of my post as a rant, I suppose the only correct answer, beside your own, would have been consult your owner's manual. It was not my intention to create an argument, as opposed to merely pointing out the obvious reasons why anyone's mileage might vary. Sorry you disagree.

[quote="Enrique"]

Armond wrote:

Enrique wrote: It is surprising no one mentioned: "YOUR MILEAGE MAY VARY." it's because it's obvious..your rant was a waste of energy his question was "what's the general gas mileage supposed to be on a 2002" the best way to answer that is to give him basics,then he can evaluate his options based on what he's got. Chill....and try some more of that seafoam. it may work on your issues. Pesonal or otherwise. HTH I thought I tried to provide "basics" along with an explanation as to why general numbers are so ambiguous as to mean different things to different people. Based upon your characterization of my post as a rant, I suppose the only correct answer, beside your own, would have been consult your owner's manual. It was not my intention to create an argument, as opposed to merely pointing out the obvious reasons why anyone's mileage might vary. Sorry you disagree.

I dont dissagree at all. I just though you stated what is obvious. Just like you said. If that's the case. Let's take it further. Let's consider the weight of the driver,passengers,weather,gravity,full moon the list goes on. And, lets tell dealerships not to list the average MPG at the window sticker. since it varies....duh
_________________
73 Tii. My Daily driver
Volvo V70 Turbo,Wagon

Ad Deum Per Fidem Mores Culturam

General rule: anything above 15.6mpg is too much for a non-turbo four-banger, regardless of the conditions.
_________________
68' 2002 DD

Enrique forgot to mention that gas mileage may also vary depending on how many Red Wings or Celtic championship flags you're flying off the roof. Go Wings!
_________________
76 Sienabraun
Where's Alonzo?!

gregp553 wrote:

Enrique forgot to mention that gas mileage may also vary depending on how many Red Wings or Celtic championship flags you're flying off the roof. Go Wings!

that and weather or not you had a big meal after the game. And,before and after bathrom break.
_________________
73 Tii. My Daily driver
Volvo V70 Turbo,Wagon

Ad Deum Per Fidem Mores Culturam