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Mr. Bubblehead
El Chupa Nibre
Joined: October 25, 2002
Posts: 2756
Location: 612 Wharf Avenue
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 Posted: Mon Apr 11, 2005 5:53 pm Post subject: Fuel injected gas mileage |
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IS 37 MILES PER GALLON NORMAL ??!!?  
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OGST
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Russ Wolfe
Samba Member
Joined: October 08, 2004
Posts: 25187
Location: Central Iowa
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| Posted: Mon Apr 11, 2005 6:11 pm Post subject: |
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You are too lean...... 
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josh
Samba Member
Joined: July 13, 2003
Posts: 1773
Location: laid back in the tall grass
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| Posted: Mon Apr 11, 2005 6:43 pm Post subject: |
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| Mr. Bubblehead wrote: |
| IS 37 MILES PER GALLON NORMAL ??!!? |
It would be nice to think so wouldn't it? |
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blankmange
Type 3 Darksider
Joined: July 17, 2004
Posts: 11498
Location: Bloßer Stahl-preapocalyptic MidCoast
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| Posted: Mon Apr 11, 2005 7:28 pm Post subject: Re: Fuel injected gas mileage |
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| Mr. Bubblehead wrote: |
| IS 37 MILES PER GALLON NORMAL ??!!? |
dayumm!
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póg mo thóin
Certified DHS Technician
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 22727
Location: Still Feelin' the Bern- Once you've felt it you can't un- feel it.
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| Posted: Mon Apr 11, 2005 9:11 pm Post subject: |
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It's a bit on the high side. You MAY be a little too lean. Try to get a sniffer on it. Too lean will make rather quick work of your engine.
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Anniehum
Samba Member
Joined: November 23, 2003
Posts: 1197
Location: Kingston, Washington
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| Posted: Mon Apr 11, 2005 9:45 pm Post subject: |
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I run consistanly 26-27 mpg. I check it every fill up. 
Cheers
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Mr. Bubblehead
El Chupa Nibre
Joined: October 25, 2002
Posts: 2756
Location: 612 Wharf Avenue
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| Posted: Tue Apr 12, 2005 4:33 am Post subject: |
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Well I had a feeling that it was running lean, I haven't had a sniffer on it yet, but the plugs are a nice grayish-brownish color. I always thought that the plug color test was an accurate way of determining proper fuel mixture. Or is this only for carburated engines?
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SquareD
Samba Member
Joined: August 15, 2002
Posts: 266
Location: California-USA
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| Posted: Tue Apr 12, 2005 3:42 pm Post subject: |
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Before I pulled the FI engine in my 1970 Squareback, I would get about 32-33 MPG on the Freeway.
Dennis |
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vwfye
Samba Member
Joined: April 15, 2000
Posts: 7661
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| Posted: Wed Apr 13, 2005 8:19 am Post subject: |
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my FI in the 71 square is getting about 26 on the highway, but i can tell from the smells that i am running rich... so, 30 is probably possible.
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Mr. Bubblehead
El Chupa Nibre
Joined: October 25, 2002
Posts: 2756
Location: 612 Wharf Avenue
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| Posted: Wed Apr 13, 2005 1:55 pm Post subject: |
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Well I dunno WTF then...
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Russ Wolfe
Samba Member
Joined: October 08, 2004
Posts: 25187
Location: Central Iowa
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| Posted: Wed Apr 13, 2005 5:51 pm Post subject: |
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| Mr. Bubblehead wrote: |
| Well I dunno WTF then... |
I get about 28-30 on mine as a daily driver. Ten miles of gravel, and 30 miles of open highway.
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Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey
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negawsklov17
Samba Member
Joined: May 23, 2004
Posts: 95
Location: santa cruz and morgan hill
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| Posted: Wed Apr 13, 2005 6:32 pm Post subject: |
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wow i wish mine was good. it's like 16 mpg if i'm lucky. mostly city streets.
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Russ Wolfe
Samba Member
Joined: October 08, 2004
Posts: 25187
Location: Central Iowa
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| Posted: Wed Apr 13, 2005 6:54 pm Post subject: |
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| negawsklov17 wrote: |
| wow i wish mine was good. it's like 16 mpg if i'm lucky. mostly city streets. |
Experience young Jedi. Experience. and practice.
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Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey
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Comandanteche
Samba Member
Joined: November 18, 2003
Posts: 309
Location: Whittier, CA
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| Posted: Wed Apr 13, 2005 7:35 pm Post subject: |
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| youre getting 16 on carbs? is that normal? |
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Russ Wolfe
Samba Member
Joined: October 08, 2004
Posts: 25187
Location: Central Iowa
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| Posted: Wed Apr 13, 2005 8:09 pm Post subject: |
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| Comandanteche wrote: |
| youre getting 16 on carbs? is that normal? |
Not on a 1600cc stock engine. With 32 PDSIT's.
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Bobnotch
Samba Member
Joined: July 06, 2003
Posts: 22422
Location: Kimball, Mi
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| Posted: Wed Apr 13, 2005 8:53 pm Post subject: |
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| Russ Wolfe wrote: |
| Comandanteche wrote: |
| youre getting 16 on carbs? is that normal? |
Not on a 1600cc stock engine. With 32 PDSIT's. |
No, it should be 21.5 or better.
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tomnotch
Samba Member
Joined: October 22, 2004
Posts: 788
Location: Key Peninsula, Wash.
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| Posted: Thu Apr 14, 2005 5:01 am Post subject: |
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I get around 27 out on the freeway. And I figure that may go up towards 3 after I do a couple of minor changes to my efi system.
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jaransonT3
Samba Member
Joined: January 01, 2005
Posts: 1262
Location: Dearborn, MI
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| Posted: Thu Apr 14, 2005 7:43 am Post subject: |
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How much of an average is your 37mpg? If it is based ona single tank of gas or less it is pretty much meaningless, although it is high enough that it is likely you are lean.
Here is a chart I did of the mileage for my dual carbed 66 Squareback. I track it every tankfull.
Two things that really stick out. Temperature has a significant role in the mileage (at least with carbs...the FI might be better) as can be seen by the difference between the summer and winter months mileage.
The other thing is that there is a bunch of variation from tank to tank depending on where and how you drive, long trips vs. short, highway vs city, etc, etc. It is not uncommon to see 4-6 mpg difference from one tank to the next.
Make sure you have a few tank fulls run through the system with a variety of driving conditions before you jump to conclusions.
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'66 Square
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negawsklov17
Samba Member
Joined: May 23, 2004
Posts: 95
Location: santa cruz and morgan hill
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| Posted: Thu Apr 14, 2005 10:59 am Post subject: |
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well, i've been filling up the tank many times as i'm sure we all have, and on my FUEL INJECTED STOCK MOTOR i get 160 miles per tank maximum. it's really the pits, which is one of the reasons i'm planning to switch it over to dual 34 dell's with the help of my father.
and no you can't have my FI parts, sorry
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 22727
Location: Still Feelin' the Bern- Once you've felt it you can't un- feel it.
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| Posted: Thu Apr 14, 2005 11:23 am Post subject: |
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| negawsklov17 wrote: |
well, i've been filling up the tank many times as i'm sure we all have, and on my FUEL INJECTED STOCK MOTOR i get 160 miles per tank maximum. it's really the pits, which is one of the reasons i'm planning to switch it over to dual 34 dell's with the help of my father.
and no you can't have my FI parts, sorry |
You should just fix the injection. Get a Bentley and check the resistance on the head temp sensor first. Then, adjust the mixture at the pressure sensor using a sniffer. Assuming that the basic settings are correct, it's probably just that simple.
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| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
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