ZPIracing Crank Pulley V.2.0
12-22-2005, 06:01 AM
#21
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Originally Posted by kungpaosamuraiii
The 2AZ-FE is internally balanced. These pulleys will not creat issues with harmonic balancing.
What is lacking is a vibrational dampener. I don't know for myself but some say that the OEM pulley is a solid block of steel that comes like that without a dampener. Others say that much mass acts as the dampener.
Many Supra owners have had engine failures due to uncontrolled vibrations from the crank. The tC has thus far no known issues dealing with a lightened crank pulley.
What is lacking is a vibrational dampener. I don't know for myself but some say that the OEM pulley is a solid block of steel that comes like that without a dampener. Others say that much mass acts as the dampener.
Many Supra owners have had engine failures due to uncontrolled vibrations from the crank. The tC has thus far no known issues dealing with a lightened crank pulley.
12-22-2005, 05:21 PM
#22
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Originally Posted by Sam_J84
Originally Posted by ZPIracing
Yes A/P did build our first one. We designed and built these on our own. If you bought a pulley from us we may be able to offer you a discount if you wanted this one instead. The A/P pulley should not cause you any problems I still have one on my car the quality control just was not there.
If it was a good one from the start then you should be fine the design is good.
If it was a good one from the start then you should be fine the design is good.
12-23-2005, 05:40 PM
#24
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Originally Posted by zer0
I dont know how these guys pinpoint it to the crank pulley, all the supra owners I know, try for 1000hp on STOCK Block, $hit is gonna break...
12-23-2005, 08:52 PM
#25
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Originally Posted by kungpaosamuraiii
Originally Posted by zer0
I dont know how these guys pinpoint it to the crank pulley, all the supra owners I know, try for 1000hp on STOCK Block, $hit is gonna break...
12-24-2005, 08:07 AM
#28
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Well the 2JZ and the 2AZ are fundamentally different in design and characteristic so it's impossible to tell.
No doubt, the effect of the lack of vibrational damping was exaggerated by the immense amount of power those blocks were making.
To be honest, I wouldn't argue against these pulleys. At the modest settings the tC runs as (as opposed to 1000 hp @ 7000 rpm) I don't think these pulleys would cause too much trouble.
I wouldn't put one of these on my own car until a proper pulley with a damper is released but that's just me. By all means, I encourage you all to purchase these from ZPI. Although I wouldn't put a solid light pulley on my car, I would trust ZPI for performance (although this trust was slightly shaken recently - I'll say I trust anything from ZPI that has been tested by others :D )
No doubt, the effect of the lack of vibrational damping was exaggerated by the immense amount of power those blocks were making.
To be honest, I wouldn't argue against these pulleys. At the modest settings the tC runs as (as opposed to 1000 hp @ 7000 rpm) I don't think these pulleys would cause too much trouble.
I wouldn't put one of these on my own car until a proper pulley with a damper is released but that's just me. By all means, I encourage you all to purchase these from ZPI. Although I wouldn't put a solid light pulley on my car, I would trust ZPI for performance (although this trust was slightly shaken recently - I'll say I trust anything from ZPI that has been tested by others :D )
12-24-2005, 08:21 PM
#30
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Originally Posted by InjentC23
what exactly are the benefits of crank pulleys?
read on brotha!
12-25-2005, 03:07 AM
#32
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Originally Posted by -NEMESIS-
how much did the previous pulley weight as opposed to the new one? Any one know how much the nst one weighs? stock?
-Dan
12-28-2005, 12:48 PM
#37
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Im running the AP one and have no issues with mine, No noises or anything with mine. I dont notice a big difference in mine, but Im also running huge wheels that way a ton and a butt load of stereo in the car.
12-29-2005, 07:41 PM
#39
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I have the AP pulley and when I got it I could tell a huge difference. The engine feels a lot stronger from take off. If this pulley is lighter it should help a bit more but at some point the weight stops mattering.
