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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-29-2020, 11:52 PM | #29 |
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you've got some explaining to do!
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07-30-2020, 01:53 AM | #30 |
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07-30-2020, 05:38 AM | #31 |
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Anyway, here is an opinion from a person who has tried this mod. I tried a lightweight pulley kit and I noticed a small difference, BUT it was a kit meaning that I had to change additionally the alternator pulley and the water pulley. Overall, a lightweight crank pulley won't help much alone. You need a kit with different pulley diameters to under drive the peripherals. Does it worth the effort and the cost? It depends. If it is your daily driver, then I wouldn't bother to change them.
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07-30-2020, 08:16 AM | #32 |
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07-30-2020, 08:55 AM | #33 | |
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07-30-2020, 09:21 AM | #34 |
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07-30-2020, 09:26 AM | #35 |
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When people cannot prove any power improvement, they claim throttle response since it is not measurable. Either someone posts a legitimate dyno or 0-60 test or we call the bs. Light-weight crank pulley is bs. That is the fact.
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07-30-2020, 10:04 AM | #36 |
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I think light weight pulleys only make sense if you already have light weight flywheel, carbon drive shaft, lighter wheels, and 2-piece brake rotors. I'm certain you would be able to feel the difference when you have removed that much rotational mass from the drivetrain.
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07-30-2020, 10:09 AM | #37 | |
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07-30-2020, 10:12 AM | #38 |
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07-30-2020, 10:16 AM | #39 | |
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If hp is the same and you reduce mass you get less time or more distance. Simple physics. Does it take more power to spin a 10lb disc than it does a 1lb disc to 7400rpms from 750? And not only that but you also have to accelerate the extra 9 lbs with the car. So you get less centrifugal mass plus less overall mass. The lighweight pulley works two different ways on acceleration. Last edited by solidsnake11; 07-30-2020 at 10:47 AM. |
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07-30-2020, 11:02 AM | #40 | |
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07-30-2020, 11:49 AM | #41 | |
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07-30-2020, 12:34 PM | #42 |
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