UR Pulleys = Bad???

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Nov 24, 2004 | 09:54 AM

#41

jnifong

Registered User

Joined: Dec 2002

Posts: 98

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From: NC

how much HP is freed up from swapping out the crank pulley? i search to find numbers but no luck. anyone? anyone? beuller?

jon

Nov 24, 2004 | 12:51 PM

#42

ZBoater

Registered User

Joined: Jun 2004

Posts: 743

Likes: 0

From: Tampa, Florida

Quote:

Originally posted by jnifong
how much HP is freed up from swapping out the crank pulley? i search to find numbers but no luck. anyone? anyone? beuller?

jon

I got an 8 whp and 6 ft/lbs torque bounce from the crank pulley.

Dyno before crank pulley:

Dyno after crank pulley:

And a pic of the car on the dyno....

Nov 25, 2004 | 07:50 AM

#43

ZU L8R

Viper Sellout

iTrader: (84)

Joined: Aug 2003

Posts: 6,871

Likes: 4

From: Orlando, Fl

Quote:

Originally posted by Pilot_Z
Please excuse my dumb question (still learning).

Is it possible to get a lightweight pulley without changing the diameter (without underdriving)?

I would be interested in the lighter rotational mass, but not the underdriving.

If it is possible, who sells them (with stock diameter)?
What is the stock diameter?

Thanks

This is what I'mm looking for as well. It would really help the F/I guys that currently can't use the pulley.

Nov 25, 2004 | 08:55 AM

#44

jjellyneck

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Joined: Mar 2003

Posts: 568

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From: Minneapolis

Quote:

Originally posted by ZU L8R
This is what I'mm looking for as well. It would really help the F/I guys that currently can't use the pulley.

Same here. I'd like the lighter pulley but the same diameter. I've heard that 90-95% of the benefit is due to the ligher weight, and the rest comes from the underdrive aspect.