light pulleys from UR (unorthodox racing)

[20131pz69]

Hi! I want lightweight pulleys- crank + others (should increase mpg slightly & engine response), so contacted UR who makes quality products. Here's their response:If 40 interested owners can be assembled we can make a crank pulley for roughly $200-250 depending on its size and shape. Each interested car owner would be required to submit at $100 deposit, once 40 deposit forms are received they will be charged and development of the part would begin. We would ship a production prototype to a willing owner for test fit and we would have them do a few other spot, then the owner would drive the car for a month to make sure everything functions accordingly. A production run would then be scheduled, which can take anywhere from 6-8 weeks depending on our regular production schedule. Once production is complete each owner is billed for the balance and shipped their pulley. If a group is interested let us know and we will e-mail the form to you that each owner will have to e-mail back to us.

[Hoon]

If you want to shave rotational weight buy a lightweight flywheel, don't waste your time with pulleys.

Even under-drive pulleys have little benefit in a car with electric power steering, full throttle A/C cutoff, etc.

[H3LLON3ARTH]

**** i think i hit the wrong one im down for all pullys

edit ill be the test mule lol

[20131pz69]

If you want to shave rotational weight buy a lightweight flywheel, don't waste your time with pulleys.

Even under-drive pulleys have little benefit in a car with electric power steering, full throttle A/C cutoff, etc.

I've used lightweight flywheels before (8lb/ 13 lb). They are great, the engine picks up rpm like crazy, but also drops like crazy, making the car not as easy to drive for those not used to it. I was hoping a crank pulley would not have as much as an impact on the rate of change of rpm (need to be educated more on this). It's also cheaper to install.

[jakkaroo]

been here done that.not enough support

[Hoon]

What would the estimated weight savings be?

[H3LLON3ARTH]

Now wouldn't lighter pullys make it where the engine doant have to work has hard.

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[NBrehm]

Be careful with lightweight pullies, Most vehicles have the heavy pulley to dampen the harmonic vibration the engine causes (Harmonic balancer). While they free up some ponies they also cause more wear and tear on the motor which will reduce engine life. Some made by Fluidamper or from ATI will keep the balance correct. It isn't going to cause engine failure or anything like that, but just file it in the memory banks if you do it that you may shorten the service life of the engine

[jblackburn]

As ridiculous as Chevy engineers were with designing this engine for fuel economy, they've probably already made or at least considered making the pulleys lighter than normal.

I mean, there's already a variable-displacement oil pump, AC compressor, and alternator...

The flywheel is already pretty light, just by driving the thing. It defeats that effect with a "rev hang" programmed into the ECU, however.

[20131pz69]

As ridiculous as Chevy engineers were with designing this engine for fuel economy, they've probably already made or at least considered making the pulleys lighter than normal.

I mean, there's already a variable-displacement oil pump, AC compressor, and alternator...

The flywheel is already pretty light, just by driving the thing. It defeats that with a "rev hang" programmed into the ECU, however.

that's true- there's some pretty impressive engineering on this car ....