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Old 06-29-2013, 02:30 AM   #211 (permalink)
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I like the kammback design, might have to copy it on my corolla .

Possible alt to duct taping it on is rare earth magnets, they have a short grab distance so thinner the distance from magnet to the metal the better. My orignal design (in my head) was 5 magnets at the top of the car roof, and a few on the trunk lid, and have the whole assembly pull off, but a hinge would make life so much easier!

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Old 06-29-2013, 10:21 AM   #212 (permalink)
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Quote:
Originally Posted by echo-francis View Post
to remove some rotational mass and save $$$ on swaping tires 2 times a year I bought 4 kosei k1 ts. they weight only 9.4 lbs.
It would be interesting to assess the moment of inertia of the old tire+wheel and the new ones.
Because steel wheels seems a kind of disk because of its mass distribution.
And the new ones seems like a ring with some rods, so in acceleration and braking maybe it will be any differences even if the weight half the steel ones. (alloys's moment of inertia tending to two times that of a disk).
And we need to add the fuel wasting of aerodynamics because of turbulences, not present in smooth hubcaps. And maybe adding front surface (tires have high pressure contribution, being worst than flat surface) because or adding width.
We also need to think that moment of inertia, being equal de mass and its distribution, dependens on the sqare of radius.
So going from 14" to 15" will increase moment of inertia to (15/14)^2= 115% or +15% worst braking/accelerating.
The suspension will work fine but maybe the lower profile tires will result in non confortable ride.




I'm interested in your results with this new setup.
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Old 06-29-2013, 05:28 PM   #213 (permalink)
40-60-40 MPH P&G
 
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the rims are 14p and I will install them sunday
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Best Tank (1557.2 Km): 2.57 LHK (91.63 MPG (US) )
Best Highway Trip (~36.8 Km): 2.16 LHK (109 MPG (US) )
Best Commute Trip avg (73.8 Km ): 2.33 LHK (101 MPG (US) )
Echo-Troll Modding Thread

I know i dont have a very good write-up
no lean-burn? no good gear ratio? p&g is the answer
MPG=1 TIME=0
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Old 07-07-2013, 07:16 PM   #214 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Just noticed you new fuel log entry. Congrats! And you're top of the general FE list on the main page.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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Old 07-16-2013, 07:51 PM   #215 (permalink)
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This is a fun thread because you guys work together and the car has had some big mods in quick succession. But I can't tell from the fuel log if the EWP helped FE. What do you think? How much did it help? Seems from your report backs that it might now have helped much, which is surprising. Is that true?
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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Old 07-16-2013, 10:17 PM   #216 (permalink)
Cd
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Do you guys plan to round off the corners on the Kamm-back ?

Great results with the mileage you have been getting.
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Old 07-18-2013, 10:17 AM   #217 (permalink)
40-60-40 MPH P&G
 
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I am back from my annual gaspésie trip and I completed my goal of having a 1300km+ tank I could have done 1400km if I wanted to go very low on my tank

Quote:
Originally Posted by California98Civic View Post
Just noticed you new fuel log entry. Congrats! And you're top of the general FE list on the main page.
thank you: I got those result because I sacrificed a lot of avg speed on the hyw but I dont care.
nearly 100% of my driving is p&g EOC and try coast to every stop and red light at the minimal speed to do a bump start

Quote:
Originally Posted by California98Civic View Post
This is a fun thread because you guys work together and the car has had some big mods in quick succession. But I can't tell from the fuel log if the EWP helped FE. What do you think? How much did it help? Seems from your report backs that it might now have helped much, which is surprising. Is that true?
I can not tell a %improvement with the ewp but I noticed a small difference in acceleration but the real gain is having no belt on 200km and less trip
and it reduce the warmup time


Quote:
Originally Posted by Cd View Post
Do you guys plan to round off the corners on the Kamm-back ?

Great results with the mileage you have been getting.
unfortunately the kamm back partially detached on the hyw because of the sun heating the tape. and I removed it on a hyw exit.
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Best Tank (1557.2 Km): 2.57 LHK (91.63 MPG (US) )
Best Highway Trip (~36.8 Km): 2.16 LHK (109 MPG (US) )
Best Commute Trip avg (73.8 Km ): 2.33 LHK (101 MPG (US) )
Echo-Troll Modding Thread

I know i dont have a very good write-up
no lean-burn? no good gear ratio? p&g is the answer
MPG=1 TIME=0
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Old 08-01-2013, 09:25 PM   #218 (permalink)
40-60-40 MPH P&G
 
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Echo-P&G - '05 Toyota Echo base
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today I got 2 new highscore, on a 4.2 miles commute that I do about 2 times a week. about 83 mpg B-A and 106mpg A-B avg of 94.4 mpg



my highscore for the B-A part is about 100mpg
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Best Tank (1557.2 Km): 2.57 LHK (91.63 MPG (US) )
Best Highway Trip (~36.8 Km): 2.16 LHK (109 MPG (US) )
Best Commute Trip avg (73.8 Km ): 2.33 LHK (101 MPG (US) )
Echo-Troll Modding Thread

I know i dont have a very good write-up
no lean-burn? no good gear ratio? p&g is the answer
MPG=1 TIME=0
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Old 08-02-2013, 01:00 PM   #219 (permalink)
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4.2 miles, I'd ride my bicycle.
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Old 08-02-2013, 02:06 PM   #220 (permalink)
40-60-40 MPH P&G
 
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Join Date: Feb 2011
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Echo-P&G - '05 Toyota Echo base
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90 day: 82.76 mpg (US)
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i would do it but when I commute I carry my computer tower with me

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Best Tank (1557.2 Km): 2.57 LHK (91.63 MPG (US) )
Best Highway Trip (~36.8 Km): 2.16 LHK (109 MPG (US) )
Best Commute Trip avg (73.8 Km ): 2.33 LHK (101 MPG (US) )
Echo-Troll Modding Thread

I know i dont have a very good write-up
no lean-burn? no good gear ratio? p&g is the answer
MPG=1 TIME=0
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