<VV> [UV] Re: Looking for a fuel flow sender or MPG gauge for carb engine, not EFI...

[Glen Olson]

A vacume gauge can tell you when your driving your optimiun, not autual gas mileage persay but when you are getting your best mileage 

 

________________________________
 From: Larry Forman <larry at forman.net>
To: FrankCB at aol.com 
Cc: ultravan at yahoogroups.com; VirtualVairs at corvair.org 
Sent: Thursday, October 4, 2012 1:10 PM
Subject: [UV] Re: <VV> Looking for a fuel flow sender or MPG gauge for carb engine, not EFI...
   
 
   
 
Hi Frank, OK, thanks for the advice.   Of course we all have an average MPG calculator that only needs a pencil and paper.   I was specifically looking for something instantaneous so I could make minor changes and hopefully know which is better.   I understand readings might be all over the map, but under some controlled conditions I might be able to make improvements.  It would tell me things like at a given speed, is it better when going up hill to drop down a gear or leave it in the higher gear.   A vacuum gauge cannot tell me which is the better alternative.  Also, thanks for the Innovate advice as I DO have one of those and the tail pipe adapter.   I have not yet used it for this vehicle and it has been years since I used it at all, so I need to check that it will work with my current laptop and maybe get a port adapter.  My thoughts to evaluate under controlled conditions things like removal of the air dam, addition of a cold ram air for
 the carb, and once the front air suspension is complete, vehicle height changes.   I found a great fuel mileage site:  ECOmodder.com, where they are VERY involved with all types of fuel mileage improvement.   They have a very slick approach for calculating coefficient of drag and rolling resistance by simply allowing the vehicle to slow down with three runs in each direction and by inputting the slow down data, calculate the answers.   That way you can see the effects of tire inflation, changes in improving air flow, etc.     Larry  On 10/4/2012 10:16 AM, FrankCB at aol.com wrote:  
Larry, 
>    I wouldn't recommend getting a MPG gauge that registers INSTANTANEOUS fuel consumption.  My late wife's 1989 Beretta had the optional digital dash that showed either instantaneous or average MPG.  Unless you are driving on a perfectly FLAT road, the instant. reading will vary all over the place even on apparently flat normal-driving roads. 
>    If you really want to improve your 455 engine's mileage, get a WIDE-band O2 sensor (check Innovate) and use it to set the A/F ratio for cruising conditions.  This assumes you are using lead-free gasoline otherwise the sensor won't last long.  You'll also need a timing light (I use a "dial back" one) to set up the ignition timing correctly. 
>     Good luck and let us know what works for you, 
>Frank Burkhard 
>Boonton, NJ 
>       
>
>In a message dated 10/3/2012 11:31:14 P.M. Eastern Daylight Time, larry at forman.net writes: 
>I have been looking for either an MPG gauge or fuel flow sender that I 
>>can use to make an MPG gauge for my Ultravan, Toronado
              powered Holley 
>>carbed engine.   I have found a few expensive marine or
              aero fuel flow 
>>senders and have not found any old Zemco (or other brand)
              fuel meters 
>>from the 70's.   Those might be too restrictive for a 455
              engine's carb 
>>inlet line.    Any ideas would be appreciated so I can
              make some 
>>instrumented improvements in fuel economy.  I would be
              interested in any 
>>DIY or manufactured MPG meters for non-EFI engines and
              non-OBDII engines.
>>
>>FWIW, my Ultravan #545 is running between 12 and 13 mpg on
              long trips, 
>>which is not to bad considering the engine, weight and
              frontal area, but 
>>I am looking to improve that regardless.
>>
>>Any assistance would be appreciated.
>>
>>Thanks,
>>
>>Larry Forman
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