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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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06-05-2018, 12:32 AM | #15 |
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06-05-2018, 12:34 AM | #16 |
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1974 TA22 Celica
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06-05-2018, 12:37 AM | #17 | |
¯\_(ツ)_/¯
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Edit: also love you as a steak fry. Last edited by Sapphireho; 06-05-2018 at 12:48 AM. |
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The Following User Says Thank You to Sapphireho For This Useful Post: | Spuds (06-05-2018) |
06-05-2018, 01:08 AM | #18 |
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Why can't you people stay on the damn topic ………
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06-05-2018, 01:12 AM | #20 |
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06-05-2018, 01:16 AM | #21 |
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06-05-2018, 01:18 AM | #22 | |
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Yes the Fluidampr is 5.8lbs but supposedly only 3.8lbs rotational (idk how that works) I saw a dyno comparing vs stock and light weight, and it actually lost about 1-2tq downlow and gained 1-2 top end. Either way it seems to “protect” the engine from harmonics better then stock which seems beneficial if you are modded. Stock I think is 5.1lbs? The DSS driveshaft is 2.75” diameter 12.1lbs, havnt found stock driveshaft specs from looking at it today (forgot to measure it...) it looks 2.75” for 2/3rds then the joint then 3” for 1/3rd of the driveshaft and 24.2lbs? Assuming a 200 crank hp 170 whp 15% drivetrain loss. What % if any of that is the driveshaft and does lightening it reduce the loss? |
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06-05-2018, 01:20 AM | #23 |
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The Following User Says Thank You to Spuds For This Useful Post: | Ultramaroon (06-05-2018) |
06-05-2018, 01:22 AM | #24 |
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Well, this ought to cool ya'll down ……..SMH
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06-05-2018, 01:27 AM | #25 |
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That fork looks edible.
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06-05-2018, 01:30 AM | #26 |
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86TOYO2k17: mechanical losses are what is spend on friction in various parts of transmission. Driveshaft or lighter flywheel or lighter wheels won't change a bit any of those losses. If you get upto speed then power needed to keep driving at that is absolutely same. Only things a bit affected is acceleration or slowing down, to get to that speed, when one needs to overcome rotational inertia/spend energy on that. Not mechanical losses. And if they are "affected", then it's because some dyno miscalculates power from acceleration wrongly assuming that power is only thing that changed, not because "X hp-s have been freed up, mechanical losses are less by Y%". Also, there is not much rotational inertia to be reduced with lighter driveshaft (unlike eg. flywheel or lighter wheels). Rotational inertia may depend on mass, rpms, and mass distance from rotating center. Flywheel has more of a second, it & wheels have mass & distance from center, but driveshafts have too little of diameter to make much difference. Yes, some very slight difference will be there (as from lightening in general) but probably below butt-dyno detection treshold. Main reason why one should consider aftermarket drive shafts is to get one that handles more torque then stock one if going high-gains forced-induction.
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06-05-2018, 01:31 AM | #27 | |
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I have a carbon drive shaft and I only noticed the smoothness difference from the 2 piece. I could feel the vibration with the 2 piece before it planed out. |
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06-05-2018, 01:36 AM | #28 |
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Tags |
carbon fiber, driveshaft, dss, fluidampr, pulley |
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