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 Post subject: Dart mileage!
PostPosted: Wed Aug 30, 2006 7:23 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Finally got a chance to check mileage today. In an almost perfect 3-way split of highway, boulevard and stop-and-go driving, the car returned 22.4 miles per US gallon (26.8 miles per Canadian gallon).

I consider this very acceptable! :-)

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 Post subject:
PostPosted: Wed Aug 30, 2006 7:25 pm 
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Turbo EFI
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Joined: Sat Jun 19, 2004 8:01 pm
Posts: 1937
Location: Rhine, GA
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Wow, that is very impressive, you sure know how to tune a car. Did you have to change the timing chain (plastic gear)?

Now we want to see some burnout pics :D

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2


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 Post subject:
PostPosted: Wed Aug 30, 2006 7:45 pm 
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Supercharged

Joined: Sun Jun 04, 2006 4:53 pm
Posts: 4295
Location: Gaithersburg MD
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Very good Dan. It would be interesting to get some specs on your tune up.
Sam

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 Post subject:
PostPosted: Wed Aug 30, 2006 8:04 pm 
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Quote:
Wow, that is very impressive, you sure know how to tune a car. Did you have to change the timing chain (plastic gear)?
'Course I have to change it. But I haven't, yet.
Quote:
Now we want to see some burnout pics :D
Har. Next batch of pics is going to be of the amazing newly-rebuilt/reupholstered front and rear seats!

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 Post subject:
PostPosted: Wed Aug 30, 2006 8:13 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24447
Location: North America
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Quote:
Very good Dan. It would be interesting to get some specs on your tune up.
Well..."incomplete"!

NGK ZFR5N plugs, gapped 0.040"

1964 Canadian Valiant distributor (cast iron Prestolite), new points + condenser, base timing at 10° BTDC

New Holley Economaster 1920 carb

New air filter and PCV valve

Old(!) spark plug wires

And the tires are a size larger than originally called for, so I ought to apply about a 4% correction factor and nudge those figures downward to 21.5 mpg (US gallon) 25.7 mpg (Imperial gallon). Still excellent.

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 Post subject:
PostPosted: Wed Aug 30, 2006 8:19 pm 
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Turbo EFI
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Joined: Sat Jun 19, 2004 8:01 pm
Posts: 1937
Location: Rhine, GA
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Hey Dan what are you going to do with those handmade seat covers. I can't get over the craftsmanship. Looks like it was knitte by a couple of little ole' ladies.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2


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 Post subject:
PostPosted: Wed Aug 30, 2006 8:55 pm 
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Location: North America
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They were indeed handmade by a very skillful and precise little old Austrian lady. See "Parts For Sale".

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 Post subject:
PostPosted: Wed Aug 30, 2006 9:40 pm 
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Joined: Tue Jun 27, 2006 8:21 am
Posts: 1614
Location: Orlando, FL
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What was the ambient temp with this test?
I drove my service truck from FL to NY. Started @ 11 mpg 85degrees. Half way was getting 13 mpg @60 degrees and at the end 16 mpg @30 degrees. I was very surprised with these results.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir
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 Post subject:
PostPosted: Wed Aug 30, 2006 11:24 pm 
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Supercharged
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Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7834
Location: Portland-ish
Car Model: Fiat 500e
That truck is running quite rich. The cooler denser air is burning more of the fuel passing through the engine. Could be as simple as a bad or misadjusted float. Assuming the service truck has a carburetor.

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 Post subject:
PostPosted: Thu Aug 31, 2006 2:57 am 
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TBI Slant 6
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Joined: Wed Dec 01, 2004 4:00 am
Posts: 143
Location: Southern Indiana
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:D Thats awesome! About the same as my highway mileage coming back from Columbus Ohio (22 mpg) in my 66 Dart. I don't believe I would see that kind of mileage combined city/highway driving though....
Todd


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 Post subject:
PostPosted: Thu Aug 31, 2006 4:26 am 
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Joined: Tue Jun 27, 2006 8:21 am
Posts: 1614
Location: Orlando, FL
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Service truck was a 2002 Chevy Express. (EFI) At the time it had maybe 3,000 miles on it. I've heard of better mileage with cooler air, but nothing like this. On the trip back the mileage did just the opposit, warmer air less MPG.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir
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 Post subject:
PostPosted: Thu Aug 31, 2006 5:55 am 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Ambient temp about 70°F.

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Too many people who were born on third base actually believe they've hit a triple.

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 Post subject:
PostPosted: Thu Aug 31, 2006 6:31 am 
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Turbo EFI
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Joined: Tue Feb 18, 2003 7:34 am
Posts: 2479
Location: Lubbock, Texas
Car Model: 1964 Plymouth Valiant V200 Sedan
Quote:
They were indeed handmade by a very skillful and precise little old Austrian lady. See "Parts For Sale".
In ebay-speak:

High Performance European-Engineered Driver Interface!
Power increase up to as much as 50%! (Lots of hand power went into making them)
Improves handling to match European sports cars! (Feels just like a ~1950 Ferrari in 2006 if it had the same seat covers and weighed more)
Reduced emissions! (We ARE talking seatcovers)
Mileage enhancement! (You'll enjoy driving more than if you were sitting on bare springs)

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO


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 Post subject: Re: Dart mileage!
PostPosted: Thu Aug 31, 2006 2:17 pm 
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Turbo Slant 6
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Joined: Mon Apr 04, 2005 12:22 pm
Posts: 580
Location: Austin Texas
Car Model:
Quote:
Finally got a chance to check mileage today. In an almost perfect 3-way split of highway, boulevard and stop-and-go driving, the car returned 22.4 miles per US gallon (26.8 miles per Canadian gallon).

I consider this very acceptable! :-)

Show off! :P

You do NOT want to know the mileage I got on my last tankfull with the 440 Polara. In all fairness, on that particular tank I suffered through *three* days of the kind of traffic where you sit still for 3 minutes before moving another 10 feet, lather rinse and repeat for 40 minutes with the AC blasting and in 100+ degree ambient temps. Single digits man, I've discovered single digits :-(

On the plus side, premium has dropped back below $2.80/gal (US) (he says as if that was actually significant). Its days like this that make me glad my commute is short.

I also discovered a few weeks ago that my 3-month old vacuum advance can was history, and its entirely possible that the fairly acceptable (for a 4500-lb big-block brick) 15 mpg I got on a long trip earlier this summer may have been without a working vacuum advance. So I still don't know what its ultimate highway mileage potential really is. I need to take another long trip :-)

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