MPG Pt.1

[Stewart G Griffin]

294.8 miles 17.533 gallons = 16.81 mpg
$3.399 per gallon regular at BP.   $59.59 to fillup

i am now using a grill block and tonneau.  More detail in the 2nd mpg thread.

[Edemich]

Have you looked into HHO kits?

[Stewart G Griffin]

What's HHO kit?

276.6 miles/ 16.988 = 16.28 mpg
$3.339 per gallon regular at Mobil,  $56.72 to fillup

The grill block not only does not seem to have any benefit to mpg, but actually hinders mpg as i had mostly highway miles this tank.  i think what may be happening is that the fan is engaging constantly;  i will provide more details and pictures in the next thread.

[Irish_Alley]

I remember years ago someone put a nose on their truck or car it added mpgs

[Edemich]

HHO is a Hydrogen Oxygen mix that is produced by a generator mounted in front of your radiator, ran through a reservoir, then a dryer and right into your intake. It is essentially an additive that replaces the gas used.  I have one on my 2007 Altima and have run three tanks of gas through it. Haven't seen a huge jump in mpg but I am still adjusting the EFIE controller mine requires. I have to trick my o2 sensor into telling my engine to ask for less fuel.  My mpg has had a small increase but has been more steady regardless of where I refuel. 

In a carbureted engine I think you plug the hose right into the intake somewhere and then retard the timing to account for the vapor.  Do some research on it.  Browns Gas is another name for it. I ordered my kit from www.hhokitsdirect.com.  A three person company out of Antioch,California.  So far I have been happy with there customer service.  A few of the dryers I was sent cracked to due engine heat and he replaced each at no charge and finally got me one of a different design that has allowed me to finally get into adjusting it.

[Irish_Alley]

not bashing what you have found to work edemuch but when someone says
"RETURNS/REFUNDS:

You can return your HHO Generator within 30 days of purchase for a full refund of purchase price* as long as the unit has NOT been installed, filled with electrolyte and/or been turned on and/or used in any manner. Taking apart or disassembling the hho generator or bubbler voids all warranties and refunds. If you have installed the kit in your car, you may NOT return it for any reason EXCEPT warranty repair- no refunds issued after installed in vehicle or used in any manner." thats scary when you just spent $500-$900

i tend to stay away, i mean when i drive to work i get about 19-25 mpgs going 65mph about 25min. when i drove to look at trucks going 75+ mph i get 29-32 mpgs.

even this looks funny

look at the 5th one down the cat, they report a lose yet it shows increase same deal with 10th one down. now granted i can understand getting the numbers mixed up but the 15th one (silverado) shows no before or after yet a 42% increase
their website is based mostly of jpg images, seams too "infomercial" to me. the logic seams to be there and i could see this working for a fuel injected car due to the ecu taking over. but in a carbed motor i dont see how it would work well. yeah you can get it tuned when at idle but then get to highway speed and you will prob be running too lean cause you based your cab settings off a setup at idle

Not saying this is a scam or edemich is full of it. what im saying this is a buyer beware type of situation.

[Edemich]

I am not saying it's for everyone.  Lots of skeptics with this stuff.  From my experience the guy seems on the level.  The kit is not built cheap so it appears it is worth at least most of what you pay.  Just thought it was a viable suggestion for someone who was trying to hyper mile a V8.  I drive 180 miles round trip to work every day so I figured it was a worthy investment if it worked. Just a 3 mpg gain for me is a big savings in a few months of driving.  Again this is on a Nissan Altima. 

It's sort of ironic because my truck will be lucky to have double digit gas mileage when I start driving it!

[Stewart G Griffin]

293.4 miles / 17.776 gallons = 16.50 mpg
$3.299 per gallon regular at Shell, $58.64 to fillup

i'll update on the grill block as soon as i'm able to.  i used chloropast.  Right now, it seems to have NO positive effect on mpg.

[Stewart G Griffin]

262.5 miles / 16.912 gallons = 15.52 mpg
$3.699 per gallon regular at Exxon,  62.56 to fillup

Really not sure what is going on here.  i did get stuck in a big traffic jam though so that may have something to do with the below average, for me, MPG.

[Dan75k20]

I think i get around 9-11 miles per gallon lol

[Irish_Alley]

I don't know my crew cabs mpgs yet. First test I got 11-12 mpgs on the left tank. The part that doesn't make sense is for the right tank I got 14. After that I unhooked my speedo cause I have a millage limit for my inspection.  But I had a couple gallons in each tank the other day and was able to fill both sides up for $100, must be election time again 3.03/gal

[Stewart G Griffin]

$2.94 regular here near the city.

[Stewart G Griffin]

Now down to $2.89 per gal regular at mobil.

Although there probably will not be any mpg reports from me for a while (see other post regarding engine)

[Stewart G Griffin]

212.6 miles/17.181 gallons = 12.37 mpg

$1.639 per gallon regular at Mobil,  $28.16 to fillup

This is the first serving with the "new" 4.3 v-6.  Yes your big block gets better mileage, but for this tankful i was still trying to get everything sorted out and to just get the thing running.   i had 3 different carbs on the engine finally settling with a reman jegs quadrajet.  There were a few fuel leaks while getting everything setup, one of the carbs, the 2G flooded out the top and i decided that one needed to be rebuilt.  The first quadrajet, that came with the engine, is probably junk, totally wrong for the application and just didn't run very well.

There was lots of idling and low speed testing.

i've since got the "new" reman quadrajet running ok to pretty good, finally getting around to adjusting the idle mix screws---these have the funky "double d" heads on them.  So i've leaned down the idle a bit.

i've also put in new plugs.  The plugs that came with the engine have been in there a while.

So hopefully next tank will bring some improvements.

[Stewart G Griffin]

249.6 miles/ 16.328 gallons = 15.29 mpg

$1.749 per gallon regular at mobil,  $28.56 to fillup

A little improvement, but still not quite there.  Even the 350 got better mileage.  i still think i'm rich on the idle circuit---i didn't use a vacuum gauge just did it by ear and tach. Also one of the idle mix screws is partially blocked by the EGR valve and it was hard to get to.

But i think it's more important to right now to get the fan wired up because it's getting warmer around here.  Then i can get to the idle screws again.


Anyways, in the meantime here are the specs on the "new"/(reman actually)carburetor and tell me what you think:
Jeg's model #15805   with the .073 jets and 50M primary metering rods.

http://www.jegs.com/i/JEGS-Performance-Products/555/15805/10002/-1?parentProductId=

i chose this one because i thought it would be the closest to stock.   It does seem to idle and run well.