In order to do an accurate MPG calculation you will need to have an accurate odometer. Yours is off. The percentage it is off is between 5% and 6%. Your truck will show more miles traveled than actual, skewing your MPG calculations by ~6%.
-B-
Hafc Install Thread! (mpg Increase?!) (1 Viewer)
- Thread starter SS_Storm
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In order to do an accurate MPG calculation you will need to have an accurate odometer. Yours is off. The percentage it is off is between 5% and 6%. Your truck will show more miles traveled than actual, skewing your MPG calculations by ~6%.
-B-
- Thread starter
- #122
ok, well keep that in mind for me 
It is not necessary to do this when he is interested in "at least 50% gain". He is looking for the gain percentage, not X MPG.
But it does relate to his initial '17-18 mpg starting point'.
I didn't say it is not related.
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are you guys related?
Let's see the new mileage, already.
Let's see the new mileage, already.
I didn't say that you said that it's not related.
May be you should not have quoted me in your post.
Okay, I am done with this hijack.
And I didn't say it was necessary for the 50% numbers. I only said that is necessary to adjust his calculations for an accurate MPG based on his tyre size and gear ratio.
I stand by my post.
-B-
Ouch. Sorry, man. I'm done too.
With this I do agree. While the percentage of change will be consistent, the actual MPG difference will need to be adjusted for the incorrect reading from the odometer with 4.88 gears and 35" tyres.
Well, I must admit I was skeptic. One of my engineers put a HHO system (ebay, $150) in his '70 Impala with a carb'd sbc. He went from just under 16 to just under 24 mpg increase over a 200 mile hiway test drive. He also mentioned a smoother acceleration although he was unable to quantify. I trust his measurements as I need repeatable results from his bench work - he's very careful with the little variables.
Anecdotal evidence is cheap, although I can rely on his measurement. But the reason I bring it up is that I don't see any reason these kits can't be fabbed up for cheap. For our crowd we would need a non-breakable cannisters instead of mason jars.
What else can one do with HHO? Flamethrower? Watch me light the fire!
Or how about into a heat exchanger such as in how a hot water heater works in a camper.
Any other ideas?
Anecdotal evidence is cheap, although I can rely on his measurement. But the reason I bring it up is that I don't see any reason these kits can't be fabbed up for cheap. For our crowd we would need a non-breakable cannisters instead of mason jars.
What else can one do with HHO? Flamethrower? Watch me light the fire!
Or how about into a heat exchanger such as in how a hot water heater works in a camper.
Any other ideas?
I didn't say that you said that it was necessary. Kidding
You are absolutely correct and accurate.
- Thread starter
- #134
So I tested twice tonight. first test I got 14.9 mpg than I tuned it got 18.1 mpg I have alot more head room too. I will continue tuning and keep you all updated
I'm having a little trouble with what your doing. I thought you already tuned the truck before the first run. Then when you actually saw that your MPG was worse you tuned the truck again and are now back to where you started before you installed this unit and you're now going to tune the truck a 3rd time?
To me the % of HHO/GAS should be a constant throughout the operating range and the tuning should be to a specific target. Hit your target and your done.
It looks to me that you have this Optomizer Gizmo that you are diddling with until you get better MPGs.
Won't bigger tires make his mileage show worse than it actually is?
Say X number of wheel revolutions on stock tires = 100 miles. With bigger tires each revolution travels further (larger tire circumference). X number of turns might equal 110 miles when his odometer shows 100 miles travelled.
alia176
SILVER Star
Does it really matter how accurate his odo is in the long run? We're looking for the delta increase. As long as he keeps using his inaccurate odo throughout the entire project, he'll be fine.
Don't forget that he has regeared to 4.88's along with the 35" tires. So he is actually overgeared by 5-6 percent, as Beo had stated.
Correct, My od is off about 8% with 285/75 and shows less miles traveled then actual. When I figure mpg I just do the math and add 8% to come up with the final figure, usually add about 20 miles to a tank.
The best way to check is to use a gps to track your miles traveled against your od, especially if you can do a 300 mile run without stopping.
X2. This is what I was trying to say without questioning -B-.
