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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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12-21-2020, 10:42 PM | #15 | |
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12-21-2020, 10:49 PM | #16 | |
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12-21-2020, 10:58 PM | #17 | |
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12-21-2020, 11:25 PM | #18 | |
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Ace is 9.75lbs + OP 3.5lbs = 13.25. So ace is almost 12.15lbs lighter. Stock CBE is 38lbs so if his is actually 48lbs that’s not doing anyone any favors. I believe csg mxp touring 86 is 35lbs. So OP could drop 25+ lbs and gain about 25whp and make his exhaust quieter by making the swap. |
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12-22-2020, 12:22 AM | #19 |
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Could drop 20lbs off the front just by switching to the AP Racing brake kit. And that's unsprung (and some rotational) mass as well.
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12-22-2020, 01:12 AM | #20 |
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Or Wilwood for 30lbs
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12-22-2020, 03:42 AM | #21 | |
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I have the FT86 catted UEL & 2019 TRD SE exhaust. Though it's factory, I felt that the noise can still be a cop magnet. What I've done which is quite effective is I have wrapped the front pipe & mid pipe with Design Engineering Form-A-Shield which is basically a thick yet very light thermal insulation. This absorbed the tonal frequency of the pipes & created muffled the exhaust's mid-high "tin can" note & left what sounded like a bassy hum. My family can definitely notice how much quieter it is in the cabin. If you wrap the muffler/resonator, the sound will definitely be more muffled as this it's the last area where air & the metal reverberate. Since you're also into weight reduction, have you also tried switching to aluminum/cf drive shaft? It's approx 12 lbs lighter than stock & lets you accelerate faster. Light racing wheels that are less than 18 lbs like Enkei RPF1, Enkei PF01, & Motegi MR140 to name a few fall in that category even at 18x8.5 vs 20 lbs of 17x7 stock will not only help reduce weight but also improve the handling.
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12-22-2020, 09:18 AM | #22 |
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Weight reduction
Rear Total -57.5lbs Remove Spare/tools -30lbs DIY Rear seat delete kit - 25lbs and reduced in cabin noise Catback Exhaust -2.5lbs Middle Total -35lbs Driver/Passenger Bucket Seats -24lbs Carbon Fiber Driveshaft -12lbs Decat FP -1lbs Front Total -99.5lbs Wilwood BBK -32lbs Shorai Battery -24lbs JDM AC Delete -14.5lbs never used the AC until AFTER removing it just for the fans, worked well. Ace Header/OP -12lbs Mini windshield reservoir -8lbs Beatrush Crash bar -5lbs Verus Injector covers -4lbs Total Weight reduction -192lbs Wheels dropped 3lbs a corner but tires added 3lbs so it was a wash but more grip. |
12-22-2020, 09:26 AM | #23 |
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lightweight carbon driveshaft will have no improvement to acceleration (well technically .1%) aluminum one being much larger diameter will actually decrease acceleration and most people notice a noise at higher mph.
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12-22-2020, 01:26 PM | #24 |
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Nice weight reduction list. If you get the 12.7lbs exedy lightweight flywheel, you’d be at a nice -200 lbs.
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12-22-2020, 02:33 PM | #25 |
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12-25-2020, 06:01 PM | #26 |
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At 6'0 230 i know the easiest and yet hardest weight loss mod.
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12-25-2020, 10:03 PM | #27 |
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12-25-2020, 11:53 PM | #28 |
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Wilwood 4R are 32lbs lighter then stock. Not as good of brakes as AP, but also a lot cheaper and the lightest. Solid upgrade still like. Doesn’t change brake bias. For a DD it’s very good or an NA track build that’s had some solid weight reduction.
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