mods for better mpg - Page 4

cat0020 · 05-20-2009, 05:55 AM

Quote:

Originally Posted by theholycow

Tell me the weight on the tire and the pressure in the tire, I'll tell you the contact patch. I don't need to know the tire size.

My estimate: Valkyrie 700-720 lb., rider 200-220 lb., passenger 160-180 lb., total approx. 1060-1120 lb. 36 psi in tire. What's the contact patch size?

mikehallbackhoe · 05-20-2009, 05:25 AM

my valkyrie holds 5.3 gallons, but 1.14 gallons is reserve.I fill up as soon as possible when I hit reserve, I switch to reserve between 180 and 200 miles , usually takes 4 gallons to top off. mpg drops a couple of miles when carrying a passenger. I came to this site to get some info, I am grateful for that info by the way, but I am tired of having to defend my mods and my ride, and having my honesty questioned, so I am out of here.

**Jay2TheRescue** · 05-20-2009, 05:35 AM

I'm sorry you feel that way, there are many here hypermiling with non-conventional vehicles not known for mileage. For example, my primary vehicle is a V-8 4x4 pickup truck that I can get the EPA highway rating driving in city traffic. Holy Cow also has a 4wd pickup that he hypermiles with as well. Phillip hypermiles with a stationwagon. This is a great site for information on hypermiling with vehicles that people don't usually hypermile. Other sites generally have the attitude that if you're not hypermiling a Prius or a Geo Metro then you're wasting their time.

-Jay

LTBrink · 10-20-2012, 09:13 PM

Quote:

Originally Posted by Jay2TheRescue

I'm sorry you feel that way, there are many here hypermiling with non-conventional vehicles not known for mileage. For example, my primary vehicle is a V-8 4x4 pickup truck that I can get the EPA highway rating driving in city traffic. Holy Cow also has a 4wd pickup that he hypermiles with as well. Phillip hypermiles with a stationwagon. This is a great site for information on hypermiling with vehicles that people don't usually hypermile. Other sites generally have the attitude that if you're not hypermiling a Prius or a Geo Metro then you're wasting their time.

-Jay

I like to hyper mile muscle cars and power cruisers.

alvaro84 · 10-20-2012, 11:03 PM

Quote:

Originally Posted by LTBrink

I like to hyper mile muscle cars and power cruisers.

And I hypermile a 650cc single. Not a power cruiser, but not a usual tool for the task either. But she's not too bad at FE, and much fun too.

theholycow · 05-20-2009, 06:12 AM

All that weight is on one tire? I would expect the front tire to carry some of the weight too.

1060-1120lb at 36psi is 30-31 square inches.

cat0020 · 05-20-2009, 10:53 AM

Quote:

Originally Posted by theholycow

All that weight is on one tire? I would expect the front tire to carry some of the weight too.

1060-1120lb at 36psi is 30-31 square inches.

You didn't specify the front and rear weight ratio..

Contact patch is 30-31 square inches for all sizes of tires?

theholycow · 05-20-2009, 11:16 AM

Quote:

Originally Posted by cat0020

You didn't specify the front and rear weight ratio..

I asked how much weight was on the tire, not how much weight was on both tires.

Quote:

Contact patch is 30-31 square inches for all sizes of tires?

Given the weight (on that single tire) and the inflation pressures I worked with, yes. The math is pretty simple. You have pounds, and you have PSI (Pounds per Square Inch). Divide out the pounds and you're left with square inches.

cat0020 · 05-20-2009, 11:39 AM

Quote:

Originally Posted by theholycow

Given the weight (on that single tire) and the inflation pressures I worked with, yes. The math is pretty simple. You have pounds, and you have PSI (Pounds per Square Inch). Divide out the pounds and you're left with square inches.

Different tire rubber/silica/material compound does not effect the contact patch size?