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Old 12-19-2013, 10:12 PM   #251 (permalink)
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very impressive car and build thread!

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

(on scangauge)

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Old 01-12-2014, 03:18 PM   #252 (permalink)
40-60-40 MPH P&G
 
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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
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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 01-12-2014, 07:47 PM   #253 (permalink)
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Quote:
Originally Posted by echo-francis View Post
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?
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Old 01-12-2014, 08:07 PM   #254 (permalink)
40-60-40 MPH P&G
 
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the crank shaft pulley
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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 02-02-2014, 10:13 AM   #255 (permalink)
40-60-40 MPH P&G
 
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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

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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 02-02-2014, 12:38 PM   #256 (permalink)
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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?
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Old 02-02-2014, 12:51 PM   #257 (permalink)
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Quote:
Originally Posted by xntrx View Post
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.
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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 02-02-2014, 01:09 PM   #258 (permalink)
40-60-40 MPH P&G
 
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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
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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 02-02-2014, 01:15 PM   #259 (permalink)
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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).
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Old 02-02-2014, 01:42 PM   #260 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by xntrx View Post
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.

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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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alt delete, belly pan, electric water pump, grill block, hypermiler, modding, toyota echo

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