mitsuguy

iTrader: (2)

heres another article:
http://www.machv.com/tip11cranpul.html

and another:
http://forums.evolutionm.net/archive.../t-163670.html

one more:
http://www.3000gtvr4.com/pages/underdrivepully.html

there are more out there even...

Bean

iTrader: (1)

Fixed that for you

Bean

iTrader: (1)

Well, the stock crank pulley seperates from time to time from its hub I've had it happen TWICE with the OEM pulley, then one from a SupraTT.

Aftermarket dampted pullies do not seperate This is a plus when there is an enormous amount of torque on the pulley from a large turbocharger

mitsuguy

iTrader: (2)

ohhh, I am all about an aftermarket DAMPED pulley...

$C300

iTrader: (1)

Mitsuguy i do understand, And the odds of spining a bearing do to the pulley are slim. How about this as soon as i get crank walk or spin a bearing ill let you know, dont get me wrong im not saying that a UD pulley is better, im just saying that the odds of it cousing a engine failure are small.

mitsuguy

iTrader: (2)

and I'm not saying you WILL get crankwalk or engine failure... but is the chance worth the 5 hp you might get?

5spdSC300

iTrader: (1)

Agreed. To me its clear, the chance of damaging your engine out weights the minute hp you gain. There is a reason good why yota designed the crank pulley with a dampener and why the NHRA requires you to have a dampened pulley to legally compete.

Bean

iTrader: (1)

Yup. I remember white papers from Toyota engineers about the 2jz and how it must have a damped crank pulley. The harmonics can do all sorts of damage; lots of documentation. Several years ago before most of you were here and we had a whole different generation of SC freaks; there was plenty of data running around about it. Because there was NO aftermarket damped option out there.

$C300

iTrader: (1)

I agree its a chance, and thats was my argument, Its probobly not going to happen but it might. The way the argument was presented was that you will blow your engine if u install it, and the reality you wont, sure there is a slight chance that it will lead to problems down the road, but that the risk you take.

Bean

iTrader: (1)

Its not as slight as you imagine it. Its a forgone conclusion that it will eventually cause premature engine death of some sort. Its like smoking leading to cancer. It took them so long to link it directly.

2.5tsoarer

iTrader: (3)

Correct me if I'm wrong but isn't crank walk cause but a hard high performance clutch/pressure plate ?

SC400TT

iTrader: (4)

Does anybody know of an aftermarket damped crank pulley made to fit the 1UZ?

Ryan