Echo-Troll Modding Thread (2005 Toyota Echo)

[ps2fixer]

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!

[ausias]

Originally Posted by echo-francis

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.

http://www.youtube.com/watch?v=ub6tcrJTL2c

I'm interested in your results with this new setup.

[echo-francis]

the rims are 14p and I will install them sunday

[California98Civic]

Just noticed you new fuel log entry. Congrats! And you're top of the general FE list on the main page.

[California98Civic]

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?

[Cd]

Do you guys plan to round off the corners on the Kamm-back ?

Great results with the mileage you have been getting.

[echo-francis]

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

Originally Posted by California98Civic

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

Originally Posted by California98Civic

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

Originally Posted by Cd

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.

[echo-francis]

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

[arcosine]

4.2 miles, I'd ride my bicycle.

[echo-francis]

i would do it but when I commute I carry my computer tower with me