I imagine that cost is a bit of a factor, but there are ways to make even a steel pulley lighter (weight relief) - why would Nissan opt to go
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08-31-2009, 10:19 AM | #1 (permalink) |
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Lightweight pulley Q's
I imagine that cost is a bit of a factor, but there are ways to make even a steel pulley lighter (weight relief) - why would Nissan opt to go with a heavier crank pulley?
Would there be any detrimental effects of using a lightweight pulley? Next, in relation to using an underdrive pulley vs stock size pulley - I realize the underdrive would have more of the benefit of an easier time turning the accessories on the engine due to there being a different ratio, but, how much power is "gained" simply from it being a lightweight pulley...vs a lightweight underdrive pulley? |
08-31-2009, 03:02 PM | #2 (permalink) | |
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Regarding the weight of the pulley... lighter is not ALWAYS better and there is a fine line that can be crossed. We believe that our lightweight underdrive crank pulley is in the correct range... not too heavy, not too light. Going TOO light would disrupt the natural balance and would lead to driveability issues. In relation to using a stock diameter lightweight crank pulley vs an underdrive crank pulley... weight reduction generally leads to better throttle response, quicker acceleration, and a slight increase in fuel efficiency. An underdrive lightweight crank pulley, such as the NST piece, goes one step further to release a few extra hp and tq which can be sent to the wheels instead of the accessories. A properly designed UNDERDRIVE lightweight crank pulley will always beat out a stock sized lightweight pulley if put side by side on a dyno or race track. The only time a stock diameter lightweight crank pulley would have an advantage would be on a supercharged car. SC systems generally run off the crank pulley and would see less boost if an underdrive crank pulley was used. There is a good amount of info in the new thread I recently started, regarding the NST Underdrive Crank Pulley Kit... NST (NonStopTuning) 370Z VQ37HR Pulley Kit Review w/ Dyno Charts Please feel free to contact us by phone or look for us on AIM should you have any further questions or want to discuss these questions in more depth. I'd be happy to chat with you.
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08-31-2009, 03:04 PM | #3 (permalink) | |
A True Z Fanatic
Join Date: Jun 2009
Location: Jenks, OK
Posts: 2,281
Drives: 370z Touring/Sport
Rep Power: 267 |
Quote:
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08-31-2009, 03:12 PM | #4 (permalink) |
NOT AN ACTIVE VENDOR
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My pleasure sir!
I've been working with pulleys on an almost daily basis for about a decade now. Answering questions like these is part of my daily routine. Please do consider our product if you ever decide to upgrade your pulleys.
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www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog! |
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