Echo-Troll Modding Thread (2005 Toyota Echo)

[alohaspirit]

very impressive car and build thread!

tried to do a partial grill block on my echo and the temp went way up!

(on scangauge)

[echo-francis]

some weeks ago, in my infinite quest of weight remove I installed a toyota yaris NST light weight pulley.



I noticed a increase in acceleration at about 2k rpm and more.
nothing big but butt dyno approved
the old pulley weight was 3.4-3.5 lbs and the new is 0.4-0.5 so its about a 3lbs reduction. but a VERY strategic 3 lbs reduction

[California98Civic]

Originally Posted by echo-francis

some weeks ago, in my infinite quest of weight remove I installed a toyota yaris NST light weight pulley.



I noticed a increase in acceleration at about 2k rpm and more.
nothing big but butt dyno approved
the old pulley weight was 3.4-3.5 lbs and the new is 0.4-0.5 so its about a 3lbs reduction. but a VERY strategic 3 lbs reduction

Which pulley?

[echo-francis]

the crank shaft pulley

[echo-francis]

this is me trying to do my best in the most hilly road I have drove.
the little red light left to my speedometer means EOC
no little red light mean pulse at about 80% LOD or engine breaking
sorry for the SG not lisible

https://www.youtube.com/watch?v=molxkrsfjbc

[Superfuelgero]

Nice to see the pulley worked for you. The MOI at the crank is very low, so must gains are from underdriving the acc. I was lucky as d15z1 is non-dampened stock, so longevity shouldn't be affected. Is this the same on the echo?

[California98Civic]

Originally Posted by xntrx

Nice to see the pulley worked for you. The MOI at the crank is very low, so must gains are from underdriving the acc. I was lucky as d15z1 is non-dampened stock, so longevity shouldn't be affected. Is this the same on the echo?

Nice job echo-francis!

Xntrx, by MOI are you refering to rotational mass in some way. A 3 lb reduction in rotational mass being equivalent to maybe 6 or even 12 lbs dead weight? And by dampened you mean no harmonic balancer? Or something else. Sorry for basic questions, but if I am asking then there must be other readers who don't quite recognize the terms, ether, right? I am actively considering this mod when I do scheduled timing belt work sometime in the near future, maybe March. I don't have AC or PS anymore and since the crank pulley has to come off for the timing belt replacement... maybe its a good time to mod it. Thanks man.

[echo-francis]

i dont know if my pulley is dampened or not but there are people on yaris world that have the same pulley for 50000 mi+ with no problem. and in my case there is no belt on the pulley so I dont think longevity is affected

[Superfuelgero]

Sorry, MOI = Moment of inertia. The mass of a crank pulley is "tight" to the axis, reducing the leverage.

Dampened does equal a harmonic balancer of sorts (more of a dampening of harmonics in practice).

On a d16, don't do it. These are dampened, and may lead to damage. the reason they are dampened is the r/s ratio is worse do to the longer stroke. (*edit* r/s = rod to stroke ratio, with 1.75:1 being ideal. any lower/higher becomes more unstable).

[California98Civic]

Originally Posted by xntrx

On a d16, don't do it. These are dampened, and may lead to damage. the reason they are dampened is the r/s ratio is worse do to the longer stroke. (*edit* r/s = rod to stroke ratio, with 1.75:1 being ideal. any lower/higher becomes more unstable).

But if I had a lighter pulley that was dampened or balancer adequately the mod would be useful, you think? Remember that I have to remove the pulley, anyway, to do the timing belt. And I would be replacing a pulley that must be quite heavy, with useless PS and AC spaces on it. I bet it would be very hard to find a pulley light enough and well balanced for cheap enough to make it seem like a good idea.