Balanced pulley being developed

Megan370z · 10-21-2012, 06:09 AM

Quote:

Originally Posted by ben1620

You obviously haven't done any research on the topic. Under-drive and/or Lightweight pulleys both have unique advantages while Harmonic Balancers prevent vibration that can lead to crankshaft failure and/or fusion with the pulley. Feel free to educate yourself on both topics and I won't waste time explaining. It doesn't always happen but it's a chance that I choose not to take bc this is a universal issue when choosing an aftermarket pulley. Crankshafts even break in LS engines from the same thing if someone doesnt want to spend the extra $$$ on a fluidampr. The last pulley that I saw for sale was taken down bc the owner said "it would not come off".

VIDS :: JAY.mp4 video by GTMPOWER - Photobucket

that video prove absolutly nothing

come on he torque down the main bolt with an impact
then
he apply HEAT ! to that bolt which will infact EXPAND in the crank

good luck getting it.

I still have my NST lightweight pulley that I took off from my engine after 70 000km being on there .. absolutly no sign of damage whatoever on the pulley itself.

takjak2 · 10-21-2012, 08:21 AM

Quote:

Originally Posted by Megan370z

after 70 000km being on there .. absolutly no sign of damage whatoever on the pulley itself.

That's not where the damage occurs. I'm can't say that it was the cause in any one case, yours included, but for every single decently documented case of a 370z engine tearing itself apart there were lightweight crank pulleys involved.

DR_ · 10-21-2012, 04:41 PM

Quote:

Originally Posted by Megan370z

I still have my NST lightweight pulley that I took off from my engine after 70 000km being on there .. absolutly no sign of damage whatoever on the pulley itself.

Your oil pump shattered with the NST pulley on. You might not think it caused it but it still makes me nervous.

Megan370z · 10-21-2012, 07:30 PM

Quote:

Originally Posted by DR_

Your oil pump shattered with the NST pulley on. You might not think it caused it but it still makes me nervous.

if you would have followed my thread you would know the failling oil pump was not due to the lightweight puulley but from the VVEL that got broken first then debris went sucked up at the oil pump.

broken parts of about 1mm was found in the oil pump section (which doesnt belong to the oil pump material) and it show us that the oil pump lived far longer than the blown VVEL

once debris get stuck in the very very tight oil pump gear , it doesnt take much to break to it.

edit; and I still feel quite confident to put that same lightweight pulley back on.

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